CN111007602A - Optical transceiver - Google Patents
Optical transceiver Download PDFInfo
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- CN111007602A CN111007602A CN201911361906.5A CN201911361906A CN111007602A CN 111007602 A CN111007602 A CN 111007602A CN 201911361906 A CN201911361906 A CN 201911361906A CN 111007602 A CN111007602 A CN 111007602A
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- optical
- lens
- optical fiber
- fiber adapter
- light
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
- G02B6/4207—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms with optical elements reducing the sensitivity to optical feedback
- G02B6/4208—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms with optical elements reducing the sensitivity to optical feedback using non-reciprocal elements or birefringent plates, i.e. quasi-isolators
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
- G02B6/4215—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms the intermediate optical elements being wavelength selective optical elements, e.g. variable wavelength optical modules or wavelength lockers
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
本发明公开一种光收发器件。其中，光收发器件包括：管壳，管壳的一端安装有光纤适配器；第一光发射组件，第一光发射组件安装于管壳远离光纤适配器的一端且与光纤适配器相对设置；隔离器，隔离器设于管壳内，并位于第一光发射组件和光纤适配器之间，隔离器对光纤适配器所接收的光信号和所发出的光信号进行隔离；第一C‑lens透镜，第一C‑lens透镜设于管壳内，并设于隔离器远离光纤适配器的一侧；以及第二C‑lens透镜，第二C‑lens透镜设于管壳内，第二C‑lens透镜邻近光纤适配器设置，第一C‑lens透镜、隔离器和第二C‑lens透镜于管壳的轴向依次间隔设置。本发明的光收发器件的光信号的耦合效率高。
The invention discloses an optical transceiver device. Wherein, the optical transceiver device includes: a tube case, an optical fiber adapter is installed at one end of the tube case; a first light emitting component, the first light emitting component is installed at one end of the tube case away from the optical fiber adapter and is opposite to the optical fiber adapter; an isolator, isolating The isolator is set in the tube casing and between the first light emitting component and the optical fiber adapter. The isolator isolates the optical signal received by the optical fiber adapter and the optical signal sent out; the first C-lens lens, the first C-lens lens, the first C-lens The lens is arranged in the tube casing and on the side of the isolator away from the optical fiber adapter; and a second C-lens lens, the second C-lens lens is arranged in the tube casing, and the second C-lens lens is arranged adjacent to the optical fiber adapter , the first C-lens lens, the isolator and the second C-lens lens are arranged at intervals in the axial direction of the tube casing. The optical transceiver device of the present invention has high coupling efficiency of optical signals.
Description
Technical Field
The invention relates to the technical field of optical fiber communication, in particular to an optical transceiver.
Background
The optical transceiver is an important photoelectric device in optical communication, namely, an optical receiving component and an optical transmitting component are packaged in the same photoelectric device, the optical transmitting component transmits laser signals, the optical receiving component receives the laser signals, and the transmitted and received optical signals are transmitted through an optical fiber. Light emitted by the light emitting assembly needs to transmit various optical elements, optical phenomena such as reflection, refraction and the like can occur, so that when light beams are converged into a fiber core of the optical fiber adapter through the lens, focal points cannot be all concentrated on the same point of the same section of the fiber core in the optical fiber adapter, and the light beams are converged into a beam spot, and the condition generates aberration, so that the efficiency of coupling light to the optical fiber adapter is low.
The above is only for the purpose of assisting understanding of the technical solutions of the present application, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention provides an optical transceiver, which aims to reduce aberration and improve the coupling efficiency of optical signals.
To achieve the above object, the present invention provides an optical transceiver comprising:
the optical fiber adapter comprises a tube shell, wherein one end of the tube shell is provided with an optical fiber adapter;
the first light emitting assembly is arranged at one end, far away from the optical fiber adapter, of the tube shell and is opposite to the optical fiber adapter;
the isolator is arranged in the tube shell and positioned between the first light emitting component and the optical fiber adapter, and isolates the optical signal received by the optical fiber adapter from the optical signal sent by the optical fiber adapter;
the first C-lens is arranged in the tube shell and arranged on one side of the isolator, which is far away from the optical fiber adapter; and
the second C-lens is arranged in the tube shell, the second C-lens is arranged close to the optical fiber adapter, and the first C-lens, the isolator and the second C-lens are sequentially arranged at intervals in the axial direction of the tube shell;
and the light rays emitted by the first light emitting assembly sequentially pass through the first C-lens and the second C-lens to be converged into the optical fiber of the optical fiber adapter.
Optionally, the aperture of the first C-lens is larger than the aperture of the second C-lens.
Optionally, the optical transceiver further includes a second light emitting module disposed on a sidewall of the package and a first optical filter disposed in the package, the first optical filter is disposed near the first light emitting module and the second light emitting module, and the first optical filter, the first C-lens, the isolator, and the second C-lens are sequentially disposed at intervals in an axial direction of the package;
the first optical filter is used for transmitting the light beams emitted by the first light emitting assembly and reflecting the light beams emitted by the second light emitting assembly, and the generated two parallel light beams with different wavelengths are converged into the optical fiber of the optical fiber adapter through the first C-lens and the second C-lens in sequence.
Optionally, the optical transceiver further includes an aspheric lens disposed in the housing, the first light emitting module emits a diverging light beam, and the aspheric lens is located between the first optical filter and the first light emitting module, so that the diverging light beam emitted by the first light emitting module forms a parallel light beam.
Optionally, the first optical filter is arranged at 45 ° to the axial direction of the tube housing.
Optionally, the optical transceiver further includes:
the first light receiving component is arranged on the side wall of the tube shell and is sequentially arranged with the second light emitting component at intervals along the axial direction of the tube shell;
a second optical filter disposed adjacent to the first light receiving element; and
a reflective sheet disposed opposite to the second light receiving member and adjacent to the second C-lens;
and the light beam emitted by the optical fiber adapter is reflected to the reflector plate through the second optical filter, and the reflector plate transmits the light beam to the first light receiving component.
Optionally, the reflector plate is arranged at an angle of 32 ° with the axial direction of the tube shell.
Optionally, the second filter is disposed at 13 ° from a vertical line of the central axis of the tube shell.
Optionally, the optical transceiver further includes a second light receiving module, where the second light receiving module is disposed on a sidewall of the package and spaced apart from the first light receiving module; and
a third optical filter, disposed adjacent to the isolator and on a side of the isolator away from the first C-lens, the third optical filter being disposed opposite to the second light receiving element;
and the light beam emitted by the optical fiber adapter is reflected to the second light receiving component through the third optical filter.
Optionally, the third optical filter is arranged at 45 ° to the axial direction of the tube housing.
The invention relates to an optical transceiver, which comprises a tube shell, a first light emitting component, an isolator, a first C-lens and a second C-lens, wherein the first light emitting component and an optical fiber adapter are respectively arranged at two ends of the tube shell, the isolator is arranged in the tube shell and positioned between the first light emitting component and the optical fiber adapter, the isolator isolates optical signals received by the optical fiber adapter and emitted optical signals, the first C-lens and the second C-lens are both arranged in the tube shell, the first C-lens and the second C-lens can convert light rays emitted by the optical fiber adapter into parallel light and reconverge the light rays emitted by the first light emitting component into optical fibers of the optical fiber adapter, the first C-lens is arranged at one side of the isolator far away from the optical fiber adapter, the second C-lens is arranged close to the optical fiber adapter, the first C-lens, the isolator and the second C-lens are sequentially arranged at intervals in the axial direction of the tube shell, light rays emitted by the first light emitting assembly sequentially pass through the first C-lens and the second C-lens to be converged into optical fibers of the optical fiber adapter, and through adjusting the positions of the first C-lens, the isolator and the second C-lens, aberration is reduced, so that more light rays can be converged at the end face of the optical fiber adapter, the intensity of light spots is enhanced, and the coupling efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic diagram of an embodiment of an optical transceiver of the present invention;
FIG. 2 is a schematic diagram of an optical path structure of an optical transmit signal of an optical transceiver according to the present invention;
fig. 3 is a schematic diagram of a partial optical path structure of a light emitting signal of the optical transceiver device in fig. 2;
fig. 4 is a schematic diagram of an optical path structure of an optical receiving signal of the optical transceiver of the present invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 1000 | |
170 | First |
| 100 | |
180 | |
| 110 | |
190 | First |
| 120 | First |
200 | Second |
| 130 | |
210 | |
| 140 | First C- |
220 | Second |
| 150 | Second C- |
230 | |
| 160 | Second light emitting module |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides an optical transceiver 1000.
Referring to fig. 1 to 4, in an embodiment of the present invention, the optical transceiver 1000 includes:
a package 100, said package 100 having a fiber optic adapter 110 mounted at one end;
a first light emitting component 120, wherein the first light emitting component 120 is mounted at one end of the case 100 far away from the fiber optic adapter 110 and is arranged opposite to the fiber optic adapter 110;
an isolator 130, said isolator 130 disposed within said package 100 and located between said first optical transmit assembly 120 and said fiber optic adapter 110, said isolator 130 isolating optical signals received by said fiber optic adapter 110 from optical signals transmitted therefrom;
a first C-lens 140, said first C-lens 140 being disposed inside said package 100 and on a side of said isolator 130 remote from said fiber optic adapter 110; and
a second C-lens 150, said second C-lens 150 being disposed inside said package 100, said second C-lens 150 being disposed adjacent to said fiber adapter 110, said first C-lens 140, said isolator 130 and said second C-lens 150 being sequentially disposed at intervals in an axial direction of said package 100;
the light emitted from the first light emitting assembly 120 sequentially passes through the first C-lens 140 and the second C-lens 150 and is converged into the optical fiber of the optical fiber adapter 110.
Specifically, the tube case 100 is a square tube base, and is made of metal, so that the durability is high. In order to converge the light emitted from the first light emitting assembly 120, the light is converged by disposing the first C-lens 140, and in order to reduce the cost, the aperture of the isolator 130 needs to be reduced, so when the first C-lens 140 is disposed in front of the isolator 130, the light beams emitted from the first light emitting assembly 120 are converged by the lens, because the incident angles of the light with the surface of the first C-lens 140 are not the same, resulting in the converging focuses not being completely converged at the same point of the same cross section. Therefore, the spot incident on the first C-lens 140 is relatively large, so that the aberration is relatively large when the light is converged by the first C-lens 140. In addition, in an actual optical module, the light emitted from the first light emitting element 120 is not necessarily completely symmetrical to the axis of the first C-lens 140, and when the light is converged by the first C-lens 140, an out-of-symmetry aberration is generated, which has a greater influence on the coupling of the light. In order to solve the aberration generated by the first C-lens 140, a second C-lens 150 is disposed in front of the fiber adapter 110 to compensate the aberration generated by the first C-lens 140, and finally, the light is converged into the fiber of the fiber adapter 110.
It is understood that, in order to ensure that the optical transceiver 1000 can achieve the target coupling efficiency, the aperture of the first C-lens 140 is larger than that of the second C-lens 150. That is, the curvatures, thicknesses, and refractive indexes of the first and second C- lens 140 and 150 can be optimized by an optical simulation software, and this processing method is well known to those skilled in the art and will not be discussed in detail herein.
The optical fiber adapter 110 can transmit light beams with wavelengths λ 1, λ 2, λ 3, and λ 4, and the first light emitting component 120 emits a light beam with a wavelength λ 1, in this embodiment, λ 1 is 1577nm laser light, and the light beam may be a parallel light beam or a divergent light beam, and if the light beam is a parallel light beam, the parallel light beam is converged by the first C-lens 140 and then converged into the optical fiber of the optical fiber adapter 110 by the second C-lens 150. If the light beam is a diverging light beam, a collimating lens may be disposed between the first light emitting assembly 120 and the first C-lens 140 to collimate the light beam to form a parallel light beam, and the parallel light beam passes through the first C-lens 140 and then is converged into the optical fiber of the optical fiber adapter 110 through the second C-lens 150.
The optical transceiver 1000 of the present invention comprises a housing 100, a first optical transmitter module 120, an isolator 130, a first C-lens 140 and a second C-lens 150, wherein the first optical transmitter module 120 and the optical fiber adapter 110 are respectively disposed at two ends of the housing 100, the isolator 130 is disposed in the housing 100 and located between the first optical transmitter module 120 and the optical fiber adapter 110, the isolator 130 isolates optical signals received by the optical fiber adapter 110 from optical signals transmitted therefrom, the first C-lens 140 and the second C-lens 150 are both disposed in the housing 100, the first C-lens 140 and the second C-lens 150 can convert light transmitted from the optical fiber adapter 110 into parallel light and reconverge light transmitted from the first optical transmitter module 120 into optical fibers of the optical fiber adapter 110, the first C-lens 140 is disposed at a side of the isolator 130 away from the optical fiber adapter 110, the second C-lens 150 is disposed adjacent to the optical fiber adapter 110, the first C-lens 140, the isolator 130 and the second C-lens 150 are sequentially disposed at intervals in the axial direction of the package 100, the light emitted by the first light emitting assembly 120 sequentially passes through the first C-lens 140 and the second C-lens 150 to be converged into the optical fiber of the optical fiber adapter 110, and by adjusting the positions of the first C-lens 140, the isolator 130 and the second C-lens 150, the aberration is reduced, so that more light can be converged at the end surface of the optical fiber adapter 110, the intensity of the light spot is enhanced, and the coupling efficiency is improved.
Further, the optical transceiver 1000 further includes a second light emitting module 160 disposed on the sidewall of the package 100 and a first filter 170 disposed in the package 100, wherein the first filter 170 is disposed near the first light emitting module 120 and the second light emitting module 160, and the first filter 170, the first C-lens 140, the isolator 130 and the second C-lens 150 are sequentially disposed at intervals in the axial direction of the package 100;
the first optical filter 170 is configured to transmit a light beam emitted by the first light emitting assembly 120 and reflect a light beam emitted by the second light emitting assembly 160, and the generated two parallel light beams with different wavelengths sequentially pass through the first C-lens 140 and the second C-lens 150 and are converged into an optical fiber of the optical fiber adapter 110.
In this embodiment, the first optical filter 170, the first C-lens 140, the isolator 130, and the second C-lens 150 are coaxially disposed, a central axis of the second light emitting assembly 160 is perpendicular to a central axis of the first light emitting assembly 120, the second light emitting assembly 160 emits a light beam with a wavelength λ 2, the light beam may be a parallel light beam or a divergent light beam, if the light beam is a parallel light beam, the parallel light beam is reflected by the first optical filter 170 to form a light beam parallel to the first light emitting assembly 120, and then the light beam is converged by the first C-lens 140 and then converged by the second C-lens 150 into the optical fiber of the optical fiber adapter 110. If the light beam is divergent, a collimating lens may be disposed between the second light emitting element 160 and the first optical filter 170 to collimate the light beam to form a parallel light beam, and the parallel light beam is reflected by the first optical filter 170 to form a light beam parallel to the first light emitting element 120, and then converged by the first C-lens 140, and then converged by the second C-lens 150 into the optical fiber of the optical fiber adapter 110. And are not intended to be limiting herein.
The first filter 170 is located at a junction of an optical path emitted from the first light emitting assembly 120 and an optical path emitted from the second light emitting assembly 160, and transmits a light beam having a wavelength λ 1 and reflects a light beam having a wavelength λ 2. The first C-lens 140 is configured to converge the parallel light beams with the wavelength λ 1 and the wavelength λ 2 to the second C-lens 150, the second C-lens 150 converges the parallel light beams with the wavelength λ 1 and the wavelength λ 2 to the optical fiber adapter 110, and the optical fiber of the optical fiber adapter 110 transmits the optical signals with the wavelengths λ 1 and λ 2 to the outside.
Referring to fig. 2 and 3 again, in an embodiment, the optical transceiver 100 further includes an aspheric lens 180 disposed in the housing 100, the first light emitting element 120 emits a diverging light beam, and the aspheric lens 180 is disposed between the first optical filter 170 and the first light emitting element 120, so that the diverging light beam emitted by the first light emitting element 120 forms a parallel light beam.
It will be appreciated that since the first light-emitting assembly 120 is disposed at the end of the housing 10, the first light-emitting assembly 120 emits a diverging beam of light in order to reduce the overall size of the optical transceiver 1000, which is small and easy to install. An aspheric lens 180 is arranged between the first optical filter 170 and the first light emitting component 120, the aspheric lens 180 is coaxial with the optical fiber adapter 110, the aspheric lens 180 is used for collimating divergent light emitted by the first light emitting component 120 to form parallel light beams, the parallel light beams reach the first optical filter 170, are filtered, then are converged by the first C-lens 140, and then are converged into an optical fiber of the optical fiber adapter 110 by the second C-lens 150, so that the coupling efficiency of light emitting signals is improved.
As shown in fig. 3, the complete light path emitted by the first light emitting assembly 120 is shown in a complete light path diagram, wherein the convergence point P 'on the near optical axis is located backward, the convergence point P on the far optical axis is located forward, the distance between the convergence point on the near optical axis and the second C-lens 150 is greater than the distance between the convergence point on the far optical axis and the second C-lens 150, and a larger distance between the convergence point P' on the near optical axis and the convergence point P on the far optical axis indicates a larger light spot of light. After the aberration compensation of the first C-lens 140 and the second C-lens 150, the convergence point P' of the paraxial region and the convergence point P of the paraxial region are closer, i.e., the convergence of the entire light beam is more concentrated, so that more light beams can be coupled into the optical fiber of the optical fiber adapter 110.
Further, the first filter 170 is disposed at 45 ° to the axial direction of the package 100.
In this embodiment, according to the transmission characteristics of the first filter 170, the divergence angle of the incident light beam affects the transmission characteristics of the first filter 170, the transmission pass band becomes smaller and the divergence loss becomes larger, and this phenomenon becomes more obvious as the incident angle increases, and generally, the polarization angle of the first filter 170 is 0 degree or 45 degrees, so the optimal incident angle of the incident light beam is 0 degree or 45 degrees. Since the central axes of the first light emitting module 120 and the second light emitting module 160 are vertically arranged, in order to reflect the light beam of the second light emitting module 160 to be parallel to the light beam of the first light emitting module 120, the first filter 170 is arranged at 45 ° to the axial direction of the package 100, and the reflecting surface of the first filter 170 faces the second light emitting module 160.
Referring to fig. 2 and 4, the optical transceiver 1000 further includes:
the first light receiving assembly 190 is disposed on the sidewall of the package 100, and the first light receiving assembly 190 and the second light emitting assembly 160 are sequentially spaced along the axial direction of the package 100;
a second optical filter 200, the second optical filter 200 being disposed adjacent to the first light receiving element 190; and
a reflective sheet 210, the reflective sheet 210 being disposed opposite to the second light receiving element 160 and adjacent to the second C-lens 150;
the light beam emitted from the fiber adapter 110 is reflected to the reflective sheet 210 through the second optical filter 200, and the reflective sheet 210 emits the light beam to the first light receiving assembly 190.
In this embodiment, the optical fiber adapter 110 further receives optical signals with wavelengths λ 3 and λ 4, the optical signals are collimated by the second C-lens 150 and then incident on the second optical filter 200, the second optical filter 200 is a small-angle optical filter, the design angle of the second optical filter 200 is 10 ° to 20 °, even if the wavelength of λ 3 and the wavelength of λ 4 are relatively close to each other, the second optical filter 200 can separate the two beams of light, the small-angle optical filter can effectively satisfy the passband range, and the device performance is improved.
The light beam λ 4 reflected by the second optical filter 200 is incident on the reflective sheet 210, the light beam is totally reflected by the reflective sheet 210 and then incident on the first light receiving assembly 190, and then the light beam is received by a detector inside the first light receiving assembly to be converted into an electrical signal, so that the receiving coupling of the first light receiving assembly 190 is realized.
In one embodiment, the second filter 200 is disposed at 13 ° to the perpendicular line of the central axis of the package 100. The reflector 210 is disposed at 32 ° to the axial direction of the package 100. The second filter 200 and the reflector 210 cooperate to change the direction of the light path by 90 degrees, so that the light beam entering the first light receiving element 190 is parallel light.
The second filter 200 is matched with the reflector 210, and can change the optical path of λ 4 by 90 degrees, and can better distinguish two adjacent receiving lights λ 3 and λ 4.λ 3 is 1310nm, λ 4 is 1270nm, the wavelengths of the two received lights are relatively close, crosstalk can be generated during receiving, the two lights are separated by the second optical filter 200 which transmits λ 3 and reflects λ 4, and the problem caused by optical crosstalk is reduced.
Further, the optical transceiver 1000 further includes a second optical receiving module 220, wherein the second optical receiving module 220 is disposed on a sidewall of the package 100 and spaced apart from the first optical receiving module 190; and
a third optical filter 230, wherein the third optical filter 230 is disposed adjacent to the isolator 130 and located on a side of the isolator 130 away from the first C-lens 140, and the third optical filter 230 is disposed opposite to the second light receiving element 220;
the light beam emitted from the fiber adapter 110 is reflected to the second light receiving element 220 through the third filter 230.
It can be understood that, after the light beam λ 3 transmitted from the second optical filter 200 is incident on the third optical filter 230, the light beam is reflected by the third optical filter 230 to the second light receiving element 220, and then is received by the detector inside the second optical filter to be converted into an electrical signal, so that the optical path completes the receiving coupling of the second light receiving element 220.
The first light receiving element 190 and the second light receiving element 220 are disposed on the sidewall of the package 100 for receiving light signals with different wavelengths, and it is understood that the first light receiving element 190 and the second light receiving element 220 may be disposed at intervals along the axial direction of the package 100, or the first light receiving element 190 and the second light receiving element 220 are disposed on two adjacent sides of the package 100, or the first light receiving element 190 and the second light receiving element 220 are disposed on two opposite sides of the package 100, in an embodiment, the first light receiving element 190 and the second light receiving element 220 are disposed on two opposite sides of the package 100, and the second light receiving element 220 and the second light emitting element 160 are disposed at intervals along the axial direction of the package 100, so that the overall structure is more compact.
The second filter 200 and the reflective sheet 210 transmit light beams having a wavelength of λ 4 to the first light receiving element 190, respectively, and the third filter 230 transmits light beams having a wavelength of λ 3 to the second light receiving element 220, respectively, according to the arrangement positions of the first light receiving element 190 and the second light receiving element 220. In this embodiment, the first light receiving element 190 and the second light receiving element 220 are preferably disposed on two opposite sides of the package 100 and between the first light emitting element 120 and the light adapter 110, so as to reduce the overall length of the package 100 and save the cost.
Further, the third filter 230 is disposed at 45 ° to the axial direction of the package 100. Since the second light receiving element 220 is disposed perpendicular to the central axis of the fiber adapter 110, in order to reflect the light beam emitted from the fiber adapter 110 into a parallel light beam, the third filter 230 is disposed at an angle of 45 ° with respect to the axial direction of the package 100, and the reflection surface of the third filter 230 faces the second light receiving element 220.
The optical transceiver 1000 of the present invention includes two transmitting terminals (the first optical transmitter module 120 and the second optical transmitter module 160) and two receiving terminals (the first optical receiver module 190 and the second optical receiver module 220), and the isolator 130 is located at a position between the focal points of the first filter 170 and the third filter 230, and is used for blocking the light passing through the third filter 230 from entering the first filter 170. When the two sets of optical signals received by the fiber adapter 110 are transmitted to the first optical receiving assembly 190 and the second optical receiving assembly 220, respectively, part of the optical signals will be reflected back to the first optical transmitting assembly 120 and the second optical transmitting assembly 160, thereby affecting the performance thereof, and the isolator 130 is used to isolate the optical signals received by the fiber adapter 110, so as to reduce the mutual crosstalk between the optical transmitting signals and the optical receiving signals.
The isolator 130 is suitable for dual-band (1270nm and 1310nm), the first light receiving component 190 receives 1310nm optical signals, the second light receiving component 220 receives 1270nm optical signals, return loss indexes of the light transceiving component 1000 at 1310nm wavelength ends are increased, light path insertion loss is small, and anti-reflection capacity of the light transceiving component 1000 is enhanced.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. An optical transceiver, comprising:
the optical fiber adapter comprises a tube shell, wherein one end of the tube shell is provided with an optical fiber adapter;
the first light emitting assembly is arranged at one end, far away from the optical fiber adapter, of the tube shell and is opposite to the optical fiber adapter;
the isolator is arranged in the tube shell and positioned between the first light emitting component and the optical fiber adapter, and isolates the optical signal received by the optical fiber adapter from the optical signal sent by the optical fiber adapter;
the first C-lens is arranged in the tube shell and arranged on one side of the isolator, which is far away from the optical fiber adapter; and
the second C-lens is arranged in the tube shell, the second C-lens is arranged close to the optical fiber adapter, and the first C-lens, the isolator and the second C-lens are sequentially arranged at intervals in the axial direction of the tube shell;
and the light rays emitted by the first light emitting assembly sequentially pass through the first C-lens and the second C-lens to be converged into the optical fiber of the optical fiber adapter.
2. The optical transceiver of claim 1 wherein the aperture of the first C-lens is larger than the aperture of the second C-lens.
3. The optical transceiver of claim 1, further comprising a second optical transmitter module disposed on a sidewall of the housing and a first optical filter disposed in the housing, wherein the first optical filter is disposed adjacent to the first optical transmitter module and the second optical transmitter module, and the first optical filter, the first C-lens, the isolator and the second C-lens are sequentially disposed at intervals in an axial direction of the housing;
the first optical filter is used for transmitting the light beams emitted by the first light emitting assembly and reflecting the light beams emitted by the second light emitting assembly, and the generated two parallel light beams with different wavelengths are converged into the optical fiber of the optical fiber adapter through the first C-lens and the second C-lens in sequence.
4. The optical transceiver of claim 3 further comprising an aspheric lens disposed within the housing, wherein the first optical transmit module emits a diverging beam, and wherein the aspheric lens is disposed between the first filter and the first optical transmit module such that the diverging beam emitted by the first optical transmit module forms a parallel beam.
5. The optical transceiver of claim 3, wherein the first filter is disposed at 45 ° to an axial direction of the housing.
6. The optical transceiver of any of claims 3-5, further comprising:
the first light receiving component is arranged on the side wall of the tube shell and is sequentially arranged with the second light emitting component at intervals along the axial direction of the tube shell;
a second optical filter disposed adjacent to the first light receiving element; and
a reflective sheet disposed opposite to the second light receiving member and adjacent to the second C-lens;
and the light beam emitted by the optical fiber adapter is reflected to the reflector plate through the second optical filter, and the reflector plate transmits the light beam to the first light receiving component.
7. The optical transceiver of claim 6 wherein the reflector plate is disposed at 32 ° to the axial direction of the housing.
8. The optical transceiver of claim 6, wherein the second filter is disposed at 13 ° from a perpendicular to a central axis of the housing.
9. The optical transceiver of claim 6, further comprising a second optical receiver module disposed on a sidewall of the housing and spaced apart from the first optical receiver module; and
a third optical filter, disposed adjacent to the isolator and on a side of the isolator away from the first C-lens, the third optical filter being disposed opposite to the second light receiving element;
and the light beam emitted by the optical fiber adapter is reflected to the second light receiving component through the third optical filter.
10. The optical transceiver of claim 9, wherein the third filter is disposed at 45 ° to an axial direction of the package.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911361906.5A CN111007602A (en) | 2019-12-24 | 2019-12-24 | Optical transceiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911361906.5A CN111007602A (en) | 2019-12-24 | 2019-12-24 | Optical transceiver |
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| CN111007602A true CN111007602A (en) | 2020-04-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911361906.5A Pending CN111007602A (en) | 2019-12-24 | 2019-12-24 | Optical transceiver |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111624714A (en) * | 2020-06-30 | 2020-09-04 | 深圳市亚派光电器件有限公司 | Optical path structure and optical device |
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| CN211293371U (en) * | 2019-12-24 | 2020-08-18 | 深圳市亚派光电器件有限公司 | Optical transceiver |
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| US20080101796A1 (en) * | 2006-10-25 | 2008-05-01 | Sumitomo Metal Mining Co., Ltd. | Bidirectional optical module |
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| CN109254355A (en) * | 2018-10-15 | 2019-01-22 | 深圳市亚派光电器件有限公司 | Light receiving element |
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