CN106908912A - For the single fiber bi-directional BOSA optical textures of high speed receive-transmit system - Google Patents
For the single fiber bi-directional BOSA optical textures of high speed receive-transmit system Download PDFInfo
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- CN106908912A CN106908912A CN201510974078.8A CN201510974078A CN106908912A CN 106908912 A CN106908912 A CN 106908912A CN 201510974078 A CN201510974078 A CN 201510974078A CN 106908912 A CN106908912 A CN 106908912A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 128
- 239000000835 fiber Substances 0.000 title claims abstract description 25
- 235000011449 Rosa Nutrition 0.000 claims abstract description 31
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 10
- 238000003780 insertion Methods 0.000 claims abstract description 9
- 230000037431 insertion Effects 0.000 claims abstract description 9
- 230000010287 polarization Effects 0.000 claims description 30
- QNRATNLHPGXHMA-XZHTYLCXSA-N (r)-(6-ethoxyquinolin-4-yl)-[(2s,4s,5r)-5-ethyl-1-azabicyclo[2.2.2]octan-2-yl]methanol;hydrochloride Chemical compound Cl.C([C@H]([C@H](C1)CC)C2)CN1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OCC)C=C21 QNRATNLHPGXHMA-XZHTYLCXSA-N 0.000 claims description 15
- 230000005540 biological transmission Effects 0.000 claims description 14
- 230000001419 dependent effect Effects 0.000 claims description 14
- 239000012528 membrane Substances 0.000 claims description 9
- 230000008033 biological extinction Effects 0.000 claims description 7
- 239000000919 ceramic Substances 0.000 claims description 6
- 239000003292 glue Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
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- 230000008878 coupling Effects 0.000 abstract description 4
- 238000010168 coupling process Methods 0.000 abstract description 4
- 238000005859 coupling reaction Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
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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
- G02B6/4206—Optical features
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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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Abstract
The invention discloses a kind of single fiber bi-directional BOSA optical textures for high speed receive-transmit system, using two-sided separate structure, transmitting terminal TOSA optical textures and receiving terminal ROSA optical textures are separated using the central dividing plate in housing.Closing light and light splitting are carried out to light beam using the Wave Decomposition multiplex optical structure in the wavelength-division multiplex closing light structure and ROSA optical textures in TOSA optical textures, TOSA structures and ROSA structures share refractive power PBS combined prisms, light splitting PBS combined prisms and optical port collimater, and will be reflected toward lower floor from the light beam of optical port collimater outgoing using refractive power PBS combined prisms, realization separates TOSA light beams and ROSA light beams.Using this design, realize that single fiber bi-directional is transmitted using a housing and an optical port so that the present invention has the advantages that simple structure, Insertion Loss are small, coupling efficiency is higher, is easily assembled debugging, volume is also smaller, cost-saved, with good application prospect.
Description
Technical field
The present invention relates to the optical transceiver module in Fibre Optical Communication Technology, more particularly to a kind of single fiber bi-directional BOSA optical textures for high speed receive-transmit system.
Background technology
It is growing with communication field, traditional transmission technology has been difficult to meet the requirement of transmission capacity and speed, in the typical application field such as field such as data center, network connection, search engine, high-performance calculation, to prevent the deficiency of broadband resource, common carrier and service suppliers are disposed to planning express network agreement of new generation, and this is accomplished by corresponding high speed transceiver module to meet the data transportation requirements of high density two-forty.In the information transmission system of high speed, need to substitute traditional optical module with highdensity optical module, using multichannel light transmit-receive technology, in more transponders and receiver being concentrated on smaller space, especially in the fiber solution of 40Gbps or 100Gbps, using the transmission technology of 4 passages, carried out data transmission with the speed of every passage 10Gbps or higher, its capacity can reach 4 times of even more highs of conventional one-channel transmission.And in such high speed transceiver module, its core component is BOSA structures in module.
Traditional BOSA structures are using the discrete frame mode of two housings, one of them is TOSA transmitter modules, another is ROSA receiver modules, this will make the bulky of BOSA modules, and cause the waste of resource, even if TOSA and ROSA is mounted in same module, two optical patchcord interfaces are also required to be launched and received, if need to launch and receive that an optical fiber is shared, need to access additional circulator, this undoubtedly increased the difficulty of operating cost and light path again.
The content of the invention
Regarding to the issue above, it is an object of the invention to provide a kind of simple structure, Insertion Loss is small, be easily assembled debugging, coupling efficiency is higher and volume also less single fiber bi-directional BOSA optical textures for high speed receive-transmit system.The BOSA optical textures directly can carry out uplink and downlink transmission on an optical fiber, without external device or equipment, enormously simplify system architecture, reduce operation cost.
To reach above-mentioned purpose, technical scheme proposed by the invention is：A kind of single fiber bi-directional BOSA optical textures for high speed receive-transmit system, including a housing, a central dividing plate is provided with the housing and by the separate transmitting terminal TOSA optical textures of the central dividing plate and receiving terminal ROSA optical textures, the transmitting terminal TOSA optical textures include the wave division multiplex laser group being set in turn in transmitting light path, collimation lens set, wavelength-division multiplex closing light structure, polarization-dependent isolator, 4th speculum, first half-wave plate, refractive power PBS combined prisms, second half-wave plate, Faraday rotation piece, light splitting PBS combined prisms and optical port collimater, also include being arranged at the magnetic patch on the left of Faraday rotation piece；The receiving terminal ROSA optical textures include the optical port collimater being set in turn in receiving light path, light splitting PBS combined prisms, Faraday rotation piece and the second half-wave plate, refractive power PBS combined prisms, the first half-wave plate, closing light PBS combined prisms, Wave Decomposition multiplex optical structure, focus lens group and receive PD groups, also including the magnetic patch being arranged on the left of Faraday rotation piece, the 3rd half-wave plate and optical path compensation piece that are arranged on the right side of Faraday rotation piece and the second half-wave plate；The transmitting terminal TOSA optical textures and receiving terminal ROSA optical textures share refractive power PBS combined prisms, light splitting PBS combined prisms and an optical port collimater, the optical port collimater ejecting end is connected with optical conenctor, the closing light PBS combined prisms from the light beam of optical port collimater outgoing in inciding receiving terminal ROSA optical textures by the through hole of central dividing plate again after light splitting PBS combined prisms and refractive power PBS combined prisms.
Further, wavelength-division multiplex closing light structure in the TOSA optical textures includes primary diaphragm group, speculum group, 45 degree of semi-transparent semi-reflecting light splitting pieces and extinction piece, the primary diaphragm group includes primary diaphragm and secondary diaphragm, and the speculum group includes the first speculum, the second speculum and the 3rd speculum；First speculum and the second speculum are respectively arranged in the first light path λ 1 and the second light path λ 2, are sequentially provided with primary diaphragm and the 3rd speculum, secondary diaphragm and 45 degree of semi-transparent semi-reflecting light splitting pieces in the 3rd light path λ 3 and the 4th light path λ 4 respectively；Primary diaphragm is used to reflect the light of the 3rd light path λ 3 of reflected light and transmission of the first speculum, 45 degree of semi-transparent semi-reflecting light splitting pieces are all reflected into by the 3rd speculum afterwards, secondary diaphragm be used for reflect the second speculum reflected light and transmission the 4th light path λ 4 light, after all enter 45 degree of semi-transparent semi-reflecting light splitting pieces.
Further, the primary diaphragm mutually be arranged in parallel with the first speculum, the secondary diaphragm and the second speculum and the 3rd speculum with 45 degree of semi-transparent semi-reflecting light splitting pieces.
Further, the extinction piece is located at 45 degree of sides of semi-transparent semi-reflecting light splitting piece, for absorbing from 45 degree of light beams of semi-transparent semi-reflecting light splitting piece side outgoing.
Further, the incidence end optical axis direction of the polarization-dependent isolator is horizontal direction, and its exit end optical axis direction is from the horizontal by 45 degree.
Further, Wave Decomposition multiplex optical structure in the ROSA optical textures includes rhombic prism and secondary diaphragm group, the secondary diaphragm group includes tertiary membrane piece, the 4th diaphragm, the 5th diaphragm and the 6th diaphragm, and the tertiary membrane piece, the 4th diaphragm, the 5th diaphragm and the 6th diaphragm are equally spacedly pasted and fixed on the outgoing end face of rhombic prism using corresponding light refractive index matching glue.
Further, the incoming position of the rhombic prism incident end face is coated with the anti-reflection film for all lambda1-wavelengths, and the highly reflecting films for the lambda1-wavelength for needing to be reflected are coated with the other positions of the incident end face.
Further, the transmitting terminal TOSA optical textures and receiving terminal ROSA optical textures realize launching and receiving the orthogonal transformation of light polarization using Faraday rotation piece and the second half-wave plate, transmitting light beam and reception light beam is produced different trends on refractive power PBS combined prisms, realize the function of single fiber bi-directional.
Further, the optical port collimater is made up of collimation lens, metal sleeve and ceramic insertion core, and the ceramic insertion core two ends carry oblique angle, it is to avoid the light beam spread out of from TOSA ends is reflected back to ROSA ends on the end face.
Further, the optical port collimater ejecting end is connected with optical conenctor using wire jumper.
Single fiber bi-directional BOSA optical textures of the present invention, laser beam is collimated by collimation lens set in transmitting terminal TOSA structures, then the light of four road different wave lengths is combined into by two-way light by wavelength-division multiplex closing light structure, again light all the way is combined into by 45 degree of semi-transparent semi-reflecting light splitting pieces, the 4th speculum, the first half-wave plate, refractive power PBS combined prisms, the second half-wave plate, Faraday rotation piece and light splitting PBS combined prisms are sequentially entered again, finally enter optical port collimater.In receiving terminal ROSA, light splitting PBS combined prisms are entered into from the light beam of optical port collimater outgoing, light beam is reflected toward lower floor using the polarization characteristic of PBS, so as to realize that receiving terminal ROSA receives light beam and transmitting terminal TOSA launches the separation of light beam, light beam is separately then oriented to by each self-corresponding PD by wavelength-division demux architecture and is received.The structure can be very good the length and width space using housing, compact conformation, and flexible and changeable, and coupling efficiency is high, there is good temperature performance, is conducive to the long range of optical signal to transmit, with practical feasibility.
Brief description of the drawings
Fig. 1 is the theory structure schematic diagram of transmitting terminal TOSA optical textures of the present invention.
Fig. 2 is the theory structure schematic diagram of receiving terminal ROSA optical textures of the present invention.
Fig. 3 is the theory structure schematic diagram of the single fiber bi-directional BOSA optical textures for high speed receive-transmit system of the present invention.
Wherein：100. wave division multiplex laser groups,101. collimation lens set,102. primary diaphragm,103. secondary diaphragm,104. first speculums,105. second speculums,106. the 3rd speculums,107.45 spend semi-transparent semi-reflecting light splitting piece,108. extinction pieces,109. polarization-dependent isolator,110. the 4th speculums,111. first half-wave plates,112. refractive power PBS combined prisms,113. second half-wave plates,114. Faraday rotation pieces,115. optical path compensation pieces,116. the 3rd half-wave plates,117. light splitting PBS combined prisms,118. magnetic patch,119. optical port collimaters,120. primary diaphragm groups,121. speculum group,122. secondary diaphragm groups,200. receive PD groups,201. focus lens group,202. tertiary membrane pieces,203. the 4th diaphragms,204. the 5th diaphragms,205. the 6th diaphragms,206. rhombic prism,207. closing light PBS combined prisms,208. housing,209. central dividing plate.
Specific embodiment
The single fiber bi-directional BOSA optical textures for high speed receive-transmit system, using two-sided separate structure, including a housing 208, a central dividing plate 209 with through hole is provided with the housing and by the separate transmitting terminal TOSA optical textures of the central dividing plate 209 and receiving terminal ROSA optical textures.
With reference to the accompanying drawings and detailed description, the present invention will be further described.
As shown in Figure 1, the transmitting terminal TOSA optical textures include the wave division multiplex laser group 100, collimation lens set 101, wavelength-division multiplex closing light structure, polarization-dependent isolator 109, the 4th speculum 110, the first half-wave plate 111, refractive power PBS combined prisms 112, the second half-wave plate 113, Faraday rotation piece 114, light splitting PBS combined prisms 117 and the optical port collimater 119 that are set in turn in transmitting light path, the also magnetic patch 118 including being arranged on the left of Faraday rotation piece.The wavelength-division multiplex closing light structure includes primary diaphragm group 120,121,45 degree of semi-transparent semi-reflecting light splitting pieces 107 of speculum group and extinction piece 108,120 groups of the primary diaphragm includes primary diaphragm 102 and secondary diaphragm 103, and the speculum group 121 includes the first speculum 104, the second speculum 105 and the 3rd speculum 106；First speculum 104 and the second speculum 105 are respectively arranged in the first light path λ 1 and the second light path λ 2, are sequentially provided with the speculum 106 of primary diaphragm 102 and the 3rd, secondary diaphragm 103 and 45 degree of semi-transparent semi-reflecting light splitting pieces 107 in the 3rd light path λ 3 and the 4th light path λ 4 respectively.
In Fig. 1, wave division multiplex laser group 100, including No. four lasers, each laser launch the laser of different wave length, and collimation lens set 101 is set in the exit end of laser, and the divergent beams for laser to be sent are collimated.Its closing light principle is described in detail below, the 4 first light of laser transmitting are all horizontal polarization state（P light）, the light of a length of λ 1 of the first light path medium wave through primary diaphragm 102 after collimation lens collimation by, into the first speculum 104, after reflection into primary diaphragm 102, then being reflected into the 3rd speculum 106, into 45 degree 50% after being reflected through the 3rd speculum 106：50% semi-transparent semi-reflecting light splitting piece 107 is reflected into polarization-dependent isolator 109；The light of a length of λ 3 of the 3rd light path medium wave is transmitted into the 3rd speculum 106, then enter 45 degree 50% after the reflection of the 3rd speculum 106 by entering primary diaphragm 102 after collimation lens collimation through primary diaphragm 102：50% semi-transparent semi-reflecting light splitting piece 107, polarization-dependent isolator 109 is entered after being reflected through 107；The light of a length of λ 2 of the second light path medium wave enters secondary diaphragm 103, then be reflected into 45 degree 50% through secondary diaphragm 103 by entering the second speculum 105 after collimation lens collimation after being reflected through the second speculum 105：50% semi-transparent semi-reflecting light splitting piece 107 is transmitted into polarization-dependent isolator 109；The light of a length of λ 4 of the 4th light path medium wave is transmitted into 45 degree 50% by entering secondary diaphragm 103 after collimation lens collimation through secondary diaphragm 103：50% semi-transparent semi-reflecting light splitting piece 107, polarization-dependent isolator 109 is transmitted into through light splitting piece 107；Therefore, λ 1, λ 2, λ 3, λ 4 is at 45 degree 50%：Closing light at 50% semi-transparent semi-reflecting light splitting piece 107, then enters polarization-dependent isolator 109, because 45 degree of semi-transparent semi-reflecting light splitting pieces 107 are 50% with horizontal state of polarization P light：50% semi-transparent semi-reflecting lens, therefore 4 light of wavelength intensity after by 45 degree of semi-transparent semi-reflecting light splitting pieces 107 only has original half, the light beam of another half intensity is exported from another direction of light splitting piece, and the extinction piece 108 for being arranged on 45 degree of sides of semi-transparent semi-reflecting light splitting piece 107 is absorbed.Because the incidence end optical axis direction of polarization-dependent isolator 109 is horizontal direction, its exit end optical axis direction is from the horizontal by 45 degree, so 4 light of wavelength retrodeviate polarization state through polarization-dependent isolator 109 being rotated into from the horizontal by 45 degree, then the first half-wave plate 111 is reflected into through the 4th speculum 110, it rotates to be the polarization state of 4 wavelength vertical with horizontal direction（S light）Enter refractive power PBS combined prisms 112 afterwards,Refractive power PBS combined prisms 112 are identical with the shape of light splitting PBS combined prisms 117,Simply putting position is mutually perpendicular to,Therefore polarization state 4 light of wavelength vertical with horizontal direction are directly transmitted through in refractive power PBS combined prisms 112,Subsequently into the second half-wave plate 113,The optical axis of the second half-wave plate 113 is from the horizontal by 67.5 degree,Therefore 4 light of wavelength vertical with horizontal direction pass through the rear polarizer direction of the second half-wave plate 113 from the horizontal by 45 degree,Subsequently into Faraday rotation piece 114,The direction of the light beam that the direction is propagated polarization state rotation in Faraday rotation piece 114 is identical with the direction of rotation in the second half-wave plate 113,The anglec of rotation is equally 45 degree,Therefore 4 light beams of wavelength of outgoing have rotated 90 degree altogether through the second half-wave plate 113 and the rear polarizer direction of Faraday rotation piece 114.Magnetic patch 118 is to provide enough magnetic field so that the change in light beam polarization direction is smoothly completed to 114.So, light beam enters into light splitting PBS combined prisms 117 with horizontal state of polarization, and PBS cemented surfaces are entered after first being reflected on the inclined-plane of light splitting PBS combined prisms 117, due to being incident P light, so being directly transmitted into optical port collimater 119.So far, transmitting terminal TOSA completes conjunction beam and the transmission of four road light.
Wherein primary diaphragm 102 is with the first speculum 104, secondary diaphragm 103 can be arranged in parallel with 45 degree of semi-transparent semi-reflecting light splitting pieces 107 with the second speculum 105 and the 3rd speculum 106.
As shown in Figure 2, the receiving terminal ROSA optical textures include the optical port collimater 119 being set in turn in receiving light path, light splitting PBS combined prisms 117, the half-wave plate 113 of Faraday rotation piece 114 and second, refractive power PBS combined prisms 112, the first half-wave plate 111, closing light PBS combined prisms 207, Wave Decomposition multiplex optical structure, focus lens group 201 and receive PD groups 200, also including the magnetic patch 118 being arranged on the left of Faraday rotation piece, the 3rd half-wave plate 116 and optical path compensation piece 115 that are arranged on the right side of Faraday rotation piece and the second half-wave plate.The decomposition multiplex optical texture includes rhombic prism 206 and secondary diaphragm group 122, the secondary diaphragm group 122 includes tertiary membrane piece 202, the 4th diaphragm 203, the 5th diaphragm 204 and the 6th diaphragm 205, and the tertiary membrane piece 202, the 4th diaphragm 203, the 5th diaphragm 204 and the 6th diaphragm 205 are equally spacedly pasted and fixed on the outgoing end face of rhombic prism 206 using corresponding light refractive index matching glue.
In Fig. 2, from the collimated light beam of the outgoing of optical port collimater 119, include light λ 1, λ 2, λ 3, the λ 4 of four road different wave lengths, when the light beam passes through light splitting PBS combined prisms 117（In corresponding diagram 1 117）, be divided into the different two-beam of polarization state, P light and S light, the wherein P light line transmission of horizontal polarization by light splitting PBS combined prisms 117, and S light is then reflected off and from other end outgoing.Because incident light direction is in opposite direction with the emergent light at TOSA ends, therefore, light beam direction of rotation in Faraday rotation piece 114 is opposite with the direction of rotation in the second half-wave plate 113, have rotated 45 degree, but because direction of rotation is opposite, light beam polarization direction is returned to horizontal direction, transmitted toward lower floor by after the reflection of refractive power PBS combined prisms 112, enter the first half-wave plate 111 from after lower floor's outgoing, because the optical axis of the first half-wave plate 111 is from the horizontal by 45 degree, therefore, light beam have rotated 90 degree by the rear polarizer direction of the first half-wave plate 111, enter Wave Decomposition multiplex optical structure after being reflected on the PBS cemented surfaces of closing light PBS combined prisms 207；From the other light beam of the outgoing of light splitting PBS combined prisms 117（S light）Incide on the 3rd half-wave plate 116, because the optical axis direction of the 3rd half-wave plate 116 is from the horizontal by 45 degree, so S light after the 3rd half-wave plate 116 by have rotated 90 degree, polarization direction becomes for horizontal direction, keep constant by light beam polarization direction after optical path compensation piece 115, transmitted toward lower floor by after the reflection of refractive power PBS combined prisms 112, enter closing light PBS combined prisms 207 from after lower floor's outgoing, Wave Decomposition multiplex optical structure is entered after PBS cemented surfaces are transmitted after first being reflected on the reflecting surface of closing light PBS combined prisms 207.The effect of wherein optical path compensation piece 115 is the equivalent optical path for making the two-beam separated by light splitting PBS combined prisms 117 reach two-beam process after the closing light of closing light PBS combined prisms 207.In fig. 2 for the convenience of principle narration, do not have strict to draw hierarchical diagram according to practical structures, receiving terminal ROSA optical textures can be more intuitively found out in the side view of Fig. 3, actually refractive power PBS combined prisms 112 reflect light beam toward lower floor, as shown in Figure 3.
In fig. 2, from the two-beam of the bottom outgoing of refractive power PBS combined prisms 112, light beam is reunited into again on closing light PBS combined prisms 207, but the light beam has gone to lower layer space transmission from the upper sheaf space of housing, can't interfere with the emitting module of transmitting terminal TOSA structures.Again the light beam after closing light includes the light λ 1 of four road different wave lengths, λ 2, λ 3, λ 4, the light beam is incided on rhombic prism 206, it is coated with the incoming position of the incident end face of rhombic prism 206 for the different light wavelength lambda 1 in four tunnels, λ 2, λ 3, the anti-reflection film of λ 4, it is to be coated with the highly reflecting films for the lambda1-wavelength for needing to be reflected in remaining position of the incident end face, it is coated with incident end face such as relative with the 5th diaphragm 204 for Different lightwave λ 2 long, λ 3, the highly reflecting films of λ 4, it is coated with the incident end face relative with the 4th diaphragm 203 for Different lightwave λ 3 long, the highly reflecting films of λ 4, highly reflecting films for light wavelength lambda 4 etc. are coated with the incident end face relative with tertiary membrane piece 202.When the light for entering rhombic prism 206 reaches six diaphragms 205,Because the diaphragm only allows wavelength to pass through for the light of λ 1 is lossless,And other wavelength Xs 2,λ3,The light of λ 4 can then be reflected,Then light beam has been divided into two-beam,Wherein a branch of wavelength passes through the 6th diaphragm 205 for the light of λ 1,It is a branch of in addition to contain wavelength X 2,λ3,On the incident end face that the light of λ 4 reflexes to rhombic prism 206 on the 6th diaphragm 205,The highly reflecting films of corresponding optical wavelength are coated with due to the incident end face,Therefore reflex on the 5th diaphragm 204 light beam,The light beam is also divided into two-beam by the 5th diaphragm 204 simultaneously,Its medium wavelength is transmitted for the light of λ 2,And wavelength is then reflected on the incident end face of rhombic prism 206 for the light of λ 3 and λ 4,It is transmitted on the 4th diaphragm 203 by the end face afterwards,Similarly,4th diaphragm 203 has transmitted the light that wavelength is λ 3,Reflect the light that wavelength is λ 4,Tertiary membrane piece 202 has transmitted the light that wavelength is λ 4.So far, separated one by one after different diaphragms selection during four light beams of wavelength are contained by secondary diaphragm group 122, and parallel incide focus lens group 201, be focused for each collimated light beam by focus lens group 201, and incide reception PD groups 200, wherein incided on each self-corresponding reception PD per Shu Guang, so far complete the decomposition and reception of light beam.
Fig. 3 is the theory structure schematic diagram of the single fiber bi-directional BOSA optical textures for high speed receive-transmit system, wherein 208 is housing, 209 is housing central dividing plate, for transmitting terminal TOSA optical textures and receiving terminal ROSA optical textures to be separated, such that it is able to more reasonably utilize the height and width spaces of housing.Upper strata is transmitting terminal TOSA optical textures, successively including wave division multiplex laser group 100, collimation lens set 101, primary diaphragm group 120,121,45 degree of semi-transparent semi-reflecting light splitting pieces 107 of speculum group, polarization-dependent isolator 109, refractive power PBS combined prisms 112, light splitting PBS combined prisms 117 etc..Enter light inlet collimater 119 simultaneously from after four road laser ECDC beams of the transmitting of wave division multiplex laser group 100, the exit end of optical port collimater 119 is connected with optical conenctor using wire jumper.Lower floor is receiving terminal ROSA optical textures, include receiving PD groups 200 successively, focus lens group 201, secondary diaphragm group 122, rhombic prism 206, closing light PBS combined prisms 207, refractive power PBS combined prisms 112, light splitting PBS combined prisms 117 and optical port collimater 119, the light beam from the incidence of optical port collimater 119 after refractive power PBS combined prisms 112 by, toward lower floor's direction refraction, realizing ROSA light beams and the separate purpose of TOSA light beams.Transmitting terminal TOSA optical textures and receiving terminal ROSA optical textures share refractive power PBS combined prisms 112, light splitting PBS combined prisms 117 and an optical port collimater 119 so that structure is more simple, more easily assembled debugging.
Optical port collimater 119 is made up of collimation lens, metal sleeve and ceramic insertion core, and the ceramic insertion core two ends in optical port collimater 119 carry oblique angle, can so avoid the light beam spread out of from transmitting terminal TOSA from being reflected back to ROSA ends in the end face.
The present invention uses micro-optics principle design, can greatly reduce Insertion Loss, improves coupling efficiency, and assembly and adjustment process simple and fast, with good temperature performance, is conducive to the long range of optical signal to transmit.
Although specifically showing and describing the present invention with reference to preferred embodiment; but those skilled in the art should be understood that; do not departing from the spirit and scope of the present invention that appended claims are limited; the present invention is made a variety of changes in the form and details, is protection scope of the present invention.
Claims (10)
1. a kind of single fiber bi-directional BOSA optical textures for high speed receive-transmit system, including a housing, a central dividing plate with through hole is provided with the housing and by the separate transmitting terminal TOSA optical textures of the central dividing plate and receiving terminal ROSA optical textures, it is characterized in that, the transmitting terminal TOSA optical textures include the wave division multiplex laser group being set in turn in transmitting light path, collimation lens set, wavelength-division multiplex closing light structure, polarization-dependent isolator, 4th speculum, first half-wave plate, refractive power PBS combined prisms, second half-wave plate, Faraday rotation piece, light splitting PBS combined prisms and optical port collimater, also include being arranged at the magnetic patch on the left of Faraday rotation piece；The receiving terminal ROSA optical textures include the optical port collimater being set in turn in receiving light path, light splitting PBS combined prisms, Faraday rotation piece and the second half-wave plate, refractive power PBS combined prisms, the first half-wave plate, closing light PBS combined prisms, Wave Decomposition multiplex optical structure, focus lens group and receive PD groups, also including the magnetic patch being arranged on the left of Faraday rotation piece, the 3rd half-wave plate and optical path compensation piece that are arranged on the right side of Faraday rotation piece and the second half-wave plate；The transmitting terminal TOSA optical textures and receiving terminal ROSA optical textures share refractive power PBS combined prisms, light splitting PBS combined prisms and an optical port collimater, the optical port collimater ejecting end is connected with optical conenctor, the closing light PBS combined prisms from the light beam of optical port collimater outgoing in inciding receiving terminal ROSA optical textures by the through hole of central dividing plate again after light splitting PBS combined prisms and refractive power PBS combined prisms.
2. a kind of single fiber bi-directional BOSA optical textures for high speed receive-transmit system as claimed in claim 1, it is characterized in that, wavelength-division multiplex closing light structure in the TOSA optical textures includes primary diaphragm group, speculum group, 45 degree of semi-transparent semi-reflecting light splitting pieces and extinction piece, the primary diaphragm group includes primary diaphragm and secondary diaphragm, and the speculum group includes the first speculum, the second speculum and the 3rd speculum；First speculum and the second speculum are respectively arranged in the first light path λ 1 and the second light path λ 2, are sequentially provided with primary diaphragm and the 3rd speculum, secondary diaphragm and 45 degree of semi-transparent semi-reflecting light splitting pieces in the 3rd light path λ 3 and the 4th light path λ 4 respectively；Primary diaphragm is used to reflect the light of the 3rd light path λ 3 of reflected light and transmission of the first speculum, 45 degree of semi-transparent semi-reflecting light splitting pieces are all reflected into by the 3rd speculum afterwards, secondary diaphragm be used for reflect the second speculum reflected light and transmission the 4th light path λ 4 light, after all enter 45 degree of semi-transparent semi-reflecting light splitting pieces.
3. a kind of single fiber bi-directional BOSA optical textures for high speed receive-transmit system as claimed in claim 2, characterized in that, the primary diaphragm mutually be arranged in parallel with the first speculum, the secondary diaphragm and the second speculum and the 3rd speculum with 45 degree of semi-transparent semi-reflecting light splitting pieces.
4. a kind of single fiber bi-directional BOSA optical textures for high speed receive-transmit system as claimed in claim 2, it is characterised in that the extinction piece located at 45 degree of sides of semi-transparent semi-reflecting light splitting piece, for absorbing from 45 degree of light beams of semi-transparent semi-reflecting light splitting piece side outgoing.
5. a kind of single fiber bi-directional BOSA optical textures for high speed receive-transmit system as claimed in claim 1 or 2, it is characterised in that the incidence end optical axis direction of the polarization-dependent isolator is horizontal direction, and its exit end optical axis direction is from the horizontal by 45 degree.
6. a kind of single fiber bi-directional BOSA optical textures for high speed receive-transmit system as claimed in claim 1, it is characterized in that, Wave Decomposition multiplex optical structure in the ROSA optical textures includes rhombic prism and secondary diaphragm group, the secondary diaphragm group includes tertiary membrane piece, the 4th diaphragm, the 5th diaphragm and the 6th diaphragm, and the tertiary membrane piece, the 4th diaphragm, the 5th diaphragm and the 6th diaphragm are equally spacedly pasted and fixed on the outgoing end face of rhombic prism using corresponding light refractive index matching glue.
7. a kind of single fiber bi-directional BOSA optical textures for high speed receive-transmit system as claimed in claim 6, it is characterized in that, the incoming position of the rhombic prism incident end face is coated with the anti-reflection film for all lambda1-wavelengths, and the highly reflecting films for the lambda1-wavelength for needing to be reflected are coated with the other positions of the incident end face.
8. a kind of single fiber bi-directional BOSA optical textures for high speed receive-transmit system as any one of claim 1,2 or 6, it is characterized in that, the transmitting terminal TOSA optical textures and receiving terminal ROSA optical textures realize launching and receiving the orthogonal transformation of light polarization using Faraday rotation piece and the second half-wave plate, transmitting light beam and reception light beam is produced different trends on refractive power PBS combined prisms, realize the function of single fiber bi-directional.
9. a kind of single fiber bi-directional BOSA optical textures for high speed receive-transmit system as any one of claim 1,2 or 6, it is characterized in that, the optical port collimater is made up of collimation lens, metal sleeve and ceramic insertion core, the ceramic insertion core two ends carry oblique angle, it is to avoid the light beam spread out of from TOSA ends is reflected back to ROSA ends on the end face.
10. a kind of single fiber bi-directional BOSA optical textures for high speed receive-transmit system as claimed in claim 1, it is characterised in that the optical port collimater ejecting end is connected with optical conenctor using wire jumper.
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