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WO2006009191A1 - Dispositif de bascule de parcours lumineux - Google Patents

Dispositif de bascule de parcours lumineux Download PDF

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Publication number
WO2006009191A1
WO2006009191A1 PCT/JP2005/013354 JP2005013354W WO2006009191A1 WO 2006009191 A1 WO2006009191 A1 WO 2006009191A1 JP 2005013354 W JP2005013354 W JP 2005013354W WO 2006009191 A1 WO2006009191 A1 WO 2006009191A1
Authority
WO
WIPO (PCT)
Prior art keywords
mirror
optical path
light beam
switching device
light
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2005/013354
Other languages
English (en)
Japanese (ja)
Inventor
Masayuki Togawa
Morio Kobayashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nabtesco Corp
Original Assignee
Nabtesco Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nabtesco Corp filed Critical Nabtesco Corp
Publication of WO2006009191A1 publication Critical patent/WO2006009191A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • G02B6/26—Optical coupling means
    • G02B6/35—Optical coupling means having switching means
    • G02B6/351—Optical coupling means having switching means involving stationary waveguides with moving interposed optical elements
    • G02B6/3512—Optical coupling means having switching means involving stationary waveguides with moving interposed optical elements the optical element being reflective, e.g. mirror
    • G02B6/3514—Optical coupling means having switching means involving stationary waveguides with moving interposed optical elements the optical element being reflective, e.g. mirror the reflective optical element moving along a line so as to translate into and out of the beam path, i.e. across the beam path
    • 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
    • G02B6/26—Optical coupling means
    • G02B6/35—Optical coupling means having switching means
    • G02B6/354—Switching arrangements, i.e. number of input/output ports and interconnection types
    • G02B6/3544—2D constellations, i.e. with switching elements and switched beams located in a plane
    • G02B6/3548—1xN switch, i.e. one input and a selectable single output of N possible outputs
    • G02B6/355—1x2 switch, i.e. one input and a selectable single output of two possible outputs

Definitions

  • the present invention relates to an optical path switching device that is used in the optical communication field such as an optical information network and an optical LAN and switches an optical path.
  • an optical path switching device that switches an optical path
  • an apparatus that displaces an optical path of a light beam using a parallelogram prism is known (for example, see Patent Document 1).
  • the non-reflective film is coated on the incident surface and the exit surface that transmit the light beam among the four surfaces of the parallelogram prism, and the two reflective surfaces that reflect the light beam are coated. Each reflective film is coated.
  • Patent Document 1 Japanese Unexamined Patent Publication No. 2003-21756 (Page 4, Figure 3)
  • Patent Document 2 discloses a technique for switching the optical path by a pair of facing mirrors instead of the parallelogram prism.
  • Each mirror has a reflective surface formed by a reflective coating on the surface of a substrate such as a plate glass.
  • This optical path switching device using a pair of mirrors does not require the light beam to pass through an anti-reflection film or the inside of the prism as in the case of using a prism, so that it is possible to prevent unnecessary reduction in transmittance, and polarization dependent loss.
  • the It is also suitable for suppressing.
  • this conventional apparatus switches the optical path by inserting and removing only one of the pair of mirrors on the optical path, the mirrors can be moved with high accuracy so that the relative positions of the mirrors are not shifted. It is necessary to move on the optical path.
  • the relative displacement of each mirror occurs, the reflection characteristics of the mirror change, and the connection state of the input / output when the optical path is switched deteriorates, resulting in an increase in light loss.
  • Patent Document 2 JP-A-5-110180 (Page 2 and Figure 4)
  • the present invention has been made to solve the conventional problems, and by using the reflection of a mirror to switch the optical path (as compared to the case of using a prism), the transmittance is unnecessarily reduced and the light is reduced.
  • An object of the present invention is to provide an optical path switching device which can eliminate the need for highly accurate movement of the mirror while effectively preventing loss.
  • the optical path switching device of the present invention comprises an input means for inputting a light beam from the outside, an output means for outputting the light beam to the outside, and a reflecting surface for displacing the light path of the light beam by reflecting the light beam.
  • a first mirror having a second mirror having a reflecting surface that displaces the optical path of the light beam by further reflecting the light beam reflected by the first mirror, and from the input unit to the output unit
  • Moving means for moving the first mirror and the second mirror on the optical path of the light beam until the first mirror and the second mirror have reflecting surfaces parallel to each other. In this state, it is fixed to the mirror fixing member.
  • the optical path switching device of the present invention switches the optical path by reflection of the first mirror and the second mirror, thereby comparing the light path switching device with the conventional device using a parallelogram prism.
  • the optical path can be switched by moving the pair of mirrors onto the optical path while holding the reflecting surfaces of the first mirror and the second mirror in parallel by the mirror fixing member.
  • the angle deviation of the optical axis to the light output means Is allowed up to ⁇ 1.0 degree.
  • setting the angle deviation of the optical axis within this allowable range can be achieved relatively easily without the mirror moving by the moving means with high accuracy. Since it is not necessary to move the mirror with high accuracy, the apparatus cost can be reduced and the assembly process can be simplified.
  • the mirror moving means in the present invention may be any means that moves the mirror fixing member that fixes each mirror. That is, each mirror moves via the mirror fixing member.
  • these mirrors can be moved on the optical path in a stable state in which the relative positions of the first and second mirrors do not change.
  • the mirror fixing member has a first surface portion and a second surface portion parallel to each other, fixes the first mirror along the first surface portion, and fixes the second mirror to the first surface portion. It can be configured to be fixed along the two face portions.
  • the first surface portion and the second surface portion of the mirror fixing member can be processed in parallel relatively easily by an existing machining facility or the like. If the first and second mirrors are fixed along these surface portions, the reflecting surfaces of the mirrors can be arranged in parallel relatively easily and with high accuracy.
  • the mirror fixing member may be formed of a material force, such as ceramics, glass, silicon, or metal, which is relatively easy to machine and easily confirms the parallelism of the first and second surface portions.
  • the reflection surface of the first mirror is aligned with the first surface portion of the mirror fixing member, and the reflection surface of the second mirror is fixed to the mirror fixing member. It is preferable to match with the second surface portion of the member.
  • the reflecting surfaces of the mirrors are aligned with the first and second surface portions of the mirror fixing member processed and processed in parallel, so that the reflecting surfaces of the mirrors can be more easily and in parallel. It can be obtained with high accuracy.
  • first mirror and the second mirror are fixed to the mirror fixing member with their respective reflecting surfaces facing each other.
  • the incident light ray directly hits the reflection surface and is reflected (for example, it is not necessary to transmit through a material such as a plate glass that supports the mirror reflection film). Reduction can be achieved, and the compatibility with a large amount of light can also be improved.
  • the first mirror and the second mirror are opposed to the first surface portion and the second surface portion of the mirror fixing member.
  • a fusion welding method fusion or welding
  • a brazing method can be employed.
  • the reflection surface of the first mirror has a lower reflectance for light rays having a wavelength within the predetermined range than that for light rays having wavelengths outside the predetermined range. It can be set.
  • the reflecting surface of the first mirror transmits a light beam having a wavelength within a predetermined range.
  • the optical path switching device of the present invention can switch the optical path by taking out only a light beam having an arbitrary wavelength.
  • the first mirror can set the thickness in the light transmission direction (thickness of the substrate such as plate glass and the reflection film) to be thinner than that of the prism, so that the polarization dependent loss due to the transmission of the light can be kept extremely small. .
  • the optical path switching device of the present invention by using the reflection of the mirror for switching the optical path (as compared with the case of using a prism), it is possible to effectively prevent unnecessary reduction in transmittance and light loss.
  • the mirror can be moved with high accuracy.
  • an optical path switching apparatus 10 includes a fiber collimator 20 as input means for receiving a light beam 11, and a fiber collimator support plate 30 that supports the fiber collimator 20. , Fiber collimators 40 and 50 as output means for outputting the light beam 11, a fiber collimator support plate 60 that supports the fiber collimators 40 and 50, and a first mirror that displaces the optical path of the light beam 11 by reflecting the light beam 11.
  • Collime 1-input, 2-output IX 2 equipped with a drive actuator 76 such as a solenoid actuator as a moving means for moving the mirrors 71 and 72 on the optical path of the light beam 11 from the data 20 to the fiber collimator 50 It is an optical path switching device.
  • a drive actuator 76 such as a solenoid actuator as a moving means for moving the mirrors 71 and 72 on the optical path of the light beam 11 from the data 20 to the fiber collimator 50 It is an optical path switching device.
  • These mirrors 71 and 72 are fixed to a mirror fixing member (not appearing in FIGS. 1 and 2) with their reflecting surfaces 71r and 72r being parallel to each other.
  • the drive actuator 76 is connected to the mirror support plate 75.
  • the pair of mirrors 71 and 72 are moved on the optical path by the drive actuator 76 with their reflecting surfaces held in parallel by the mirror fixing member, so that high accuracy is required for the movement. And not.
  • the movement can be performed in a stable state in which the relative positions of the mirrors 71 and 72 do not change.
  • the fiber collimator 20 includes an optical fiber 21 and a lens 22.
  • the optical fiber 21 is formed with an input port 21a for inputting the light beam 11 as an external force.
  • the light beam 11 output from the lens 22 of the fiber collimator 20 is a parallel beam.
  • the fiber collimator 40 includes an optical fiber 41 and a lens 42.
  • the optical fiber 41 is formed with an output port 41a for outputting the light beam 11 to the outside.
  • the fiber collimator 50 includes an optical fiber 51 and a lens 52.
  • the optical fiber 51 is formed with an output port 51a for outputting the light beam 11 to the outside.
  • the mirrors 71 and 72 are arranged in parallel to each other at an angle at which the light beam 11 is incident at about 45 °.
  • a substrate 71b or 72b made of a sheet glass cover is coated with a reflective film for forming the reflecting surfaces 71r and 72r.
  • plastic, ceramics, metal, or the like can be used in addition to the force using glass here.
  • the optical path switching device 10 switches the optical path of the light beam 11 by inserting and removing the mirrors 71 and 72 with respect to the optical path of the light beam 11.
  • the displacement of the optical path of the light beam 11 uses reflection on the reflection surface 71r of the mirror 71 and reflection on the reflection surface 72r of the mirror 72. Therefore, in principle, the width 70a of the mirrors 71 and 72 (the width of the fiber collimator 20 in the light emitting direction) may be slightly longer than the beam diameter of the light beam 11. Considering the ease of assembly and handling of the optical path switching device 10, the width 70a is, for example, 3 mm. Further, the width 70b of the mirrors 71 and 72 (the width in the direction perpendicular to the light emitting direction of the fiber collimator 20) is determined by the required displacement 11a (see FIG. 1) of the optical path of the light beam 11, and is, for example, 5 mm.
  • the pair of mirrors 71 and 72 are installed in a state where the reflecting surfaces 71r and 72r face each other.
  • the light beam 11 is reflected by directly hitting the reflecting surfaces 71r and 72r that do not pass through the substrates 71b and 72b. Therefore, it is possible to effectively prevent unnecessary reduction in transmittance and light loss compared to the conventional case where light passes through the antireflection film or the inside of the prism.
  • the optical path switching device 10 allows the light beam 11 to pass through the air instead of transmitting the inside of the prism formed of glass or the like to the light beam 11 as in the prior art.
  • the insertion loss can be reduced as compared with the conventional case.
  • the optical path switching device 10 does not need to be provided with a small and highly accurate parallelogram prism as in the prior art, the manufacturing cost can be reduced as compared with the prior art.
  • the configuration of the optical path switching device includes a mirror fixing member 80 having a surface portion 81 as a first surface portion and a surface portion 82 as a second surface portion.
  • the configuration is the same as that of the optical path switching device 10.
  • the surface portions 81 and 82 of the mirror fixing member 80 are formed in parallel to each other by cutting using an existing machining facility. By fixing the mirrors 71 and 72 along the surface portions 81 and 82, the reflecting surfaces 71r and 72r of the mirrors 71 and 72 can be installed in parallel.
  • the surface portions 81 and 82 of the mirror fixing member 80 face outward, and are configured to face the surfaces of the mirrors 71 and 72 (incident surface of the light beam 11).
  • the reflecting surfaces 71r and 72r are installed in parallel with respect to the surfaces of the mirrors 71 and 72, respectively.
  • each of the surface portions 81 and 82 may be formed inward (for example, on the inner surface having a concave cross section) so as to face the back surface of each of the mirrors 71 and 72.
  • the reflecting surfaces 71r and 72r are installed in parallel with the back surfaces of the mirrors 71 and 72 as a reference.
  • the mirrors 71 and 72 have their respective surfaces as reflecting surfaces 7 lr and 72 r, and the reflecting surfaces 71 r and 72 r are aligned with the surface portions 81 and 82 of the mirror fixing member 80 (that is, each other).
  • each mirror 71 and 72 It is fixed so that the faces face each other.
  • the reflective surfaces 71r and 72r as a reference, the parallelism between the front and back surfaces of each mirror 71 and 72 is considered.
  • the reflecting surfaces 71r and 72r of the mirrors 71 and 72 can be installed in parallel with higher accuracy in accordance with the parallel of the surface portions 81 and 82 to be engaged.
  • the mirrors 71 and 72 have their respective reflecting surfaces 71r and 72r in direct contact with the surface portions 81 and 82 of the mirror fixing member 80 (with a foreign substance such as an adhesive in between). It is fixed without any intervention. According to this, the reflecting surfaces 71r and 72r of the mirrors 71 and 72 can be arranged in parallel with higher accuracy in accordance with the surface portions 81 and 82 of the mirror fixing member 80 formed in parallel. If the mirror fixing member 80 is made of glass, the mirrors 71 and 72 having the same glass material capacity can be relatively easily fixed by welding.
  • the mirror support plate 75 supports the mirrors 71 and 72 via the mirror fixing member 80.
  • the moving means 76 moves the pair of mirrors 71 and 72 via the mirror support plate 75 and the mirror fixing member 80.
  • the pair of mirrors 71 and 72 can be moved on the optical path in a stable state where the relative positions of the mirrors 71 and 72 do not change.
  • the mirrors 71 and 72 are fixed to the mutually parallel surface portions 81 and 82 of the mirror fixing member 80, respectively.
  • the work of making the reflecting surfaces 71r and 72r parallel to each other can be facilitated.
  • the configuration of the optical path switching device 310 according to the third embodiment will be described.
  • FIG. 4 shows the overall configuration of the optical path switching device 310.
  • the first mirror 371 is basically different from the first embodiment.
  • the mirror 371 in the present embodiment is set to have a low reflectance relative to a light beam having a wavelength within a predetermined range compared to a reflectivity for a light beam having a wavelength outside that range. That is, the reflecting surface 371r of the mirror 371 has a filter function, and is basically set to transmit only light having a wavelength within a predetermined range.
  • the other mirror 72 is a total reflection mirror as in the first embodiment.
  • FIG. 6 shows the relationship between the reflectance and wavelength of the first mirror 371 in the present embodiment.
  • the first mirror 371 has a reflectance of 80% or more of light with a high wavelength ⁇ 1 within a specific range, and a reflectance of light with a low wavelength ⁇ 2 within another specific range of 30% or less.
  • the input means fiber collimator 20
  • the output means fiber collimator 40
  • the light with the wavelength ⁇ 2 is always output from the output port 41a regardless of the movement of the mirrors 71 and 72, and the light with the wavelength ⁇ 1 is moved by the mirrors 71 and 72. Depending on the output, it is output from either output port 41a or 51a.
  • an optical switch for an optical communication system (OADM system) that allocates an optical signal for each wavelength can be realized.
  • the switching means including a mirror having a filter function as shown in the third embodiment can be used by incorporating a plurality of switching means in one optical path switching device.
  • the switching means here includes a pair of mirrors, a mirror fixing member for fixing these mirrors, a mirror support plate for moving the mirrors, and a drive actuator, and is responsible for switching the optical path in the optical path switching device. It is a partial element.
  • FIG. 7 is a view of the optical path switching device 410 according to the fourth embodiment as well.
  • symbol is attached
  • the optical path switching device 410 is also a 1 ⁇ 2 optical path switching device with 1 input and 2 outputs, as in the other embodiments.
  • One input means (fiber collimator 20) is provided with a pair of mirrors (first mirror 711 and second mirror 721) as the first switching means 491, and the other output means (fiber collimators 40, 50).
  • Side as second switching means 492 A pair of mirrors (first mirror 712 and second mirror 722) are arranged.
  • Each pair of mirrors 711, 721 and 712, 722 is fixed to a mirror fixing member (not shown), and can be moved by a drive actuator via a mirror support plate.
  • FIG. 8 is a characteristic diagram showing the relationship between the reflectance and wavelength of each of the first mirrors 711 and 712.
  • the first mirror 711 in the first switching means 491 has a reflectance of light having a high wavelength ⁇ 1 within a specific range of 80% or more, and an intermediate wavelength ⁇ 2 and a low wavelength ⁇ 3 within another specific range.
  • the reflectance of light is 30% or less.
  • the first mirror 712 in the second switching means 492 has a reflectance of 80% or more for the light of the intermediate wavelength 2 and a reflectance of 30% for the light of the other high wavelength ⁇ 1 and low wavelength ⁇ 3. It is as follows.
  • Each of the second mirrors 721 and 722 is a total reflection mirror.
  • Table 1 shows the wavelength of light emitted from the output port 41a
  • Table 2 shows the wavelength of light emitted from the output port 51a. Each is shown.
  • a fiber collimator 20 as an input means emits a light beam 11 including each wavelength 1, ⁇ 2 and 3.
  • the state where each mirror has moved onto the light beam is indicated as “ ⁇ ”
  • the state where each mirror is retracted from the light beam is indicated as “OFF”.
  • the optical path switching device 410 shown in the present embodiment it becomes possible to divide light according to the three types of wavelengths ⁇ 1 to 3.
  • two switching means are provided in series.
  • the present invention is not limited to this, and a plurality of (two or more) switching means are provided in series or in parallel. It can also be provided. Even when a plurality of switching means are provided, the mirrors need not be moved with high accuracy because the reflecting surfaces of the pair of mirrors in each switching means are kept parallel. In addition, since it is not necessary to match the positions of the switching means with high accuracy, the assembly process of the apparatus can be simplified and the manufacturing cost can be reduced.
  • the optical path switching device uses the reflection of the mirror for switching the optical path, thereby reducing unnecessary transmission loss and light transmission (as compared to the case of using a prism).
  • an optical path switching device used in the optical communication field such as optical information network and optical LAN (Local Area Network)
  • it has the effect of eliminating the need for high-precision movement of this mirror while effectively preventing loss. Useful.
  • FIG. 1 (a) is a perspective view of an optical path switching device 10 according to the first embodiment of the present invention
  • FIG. 1 (b) is a perspective view showing a state in which the optical path is switched in (a).
  • FIG. 2 is a top view of the vicinity of a mirror of the optical path switching device 10 shown in FIG. 1 (b).
  • FIG. 3 (a) is a perspective view of the vicinity of a mirror of an optical path switching device according to a second embodiment of the present invention, and (b) is a top view of (a).
  • FIG. 4 (a) is a perspective view of an optical path switching device 310 according to a third embodiment of the present invention, and (b) is this view.
  • FIG. 6 (a) is a perspective view showing a state where the optical path is switched.
  • FIG. 5 is a top view of the vicinity of a mirror of the optical path switching device 310 shown in FIG. 4 (b).
  • FIG. 6 is a characteristic diagram of the first mirror 371 shown in FIG.
  • FIG. 7 is a top view of an optical path switching device 410 according to a fourth embodiment of the present invention.
  • FIG. 8 is a characteristic diagram of first mirrors 711 and 712 shown in FIG.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Light Control Or Optical Switches (AREA)

Abstract

[PROBLÈMES] Dispositif de bascule de parcours lumineux pour lequel une réduction indésirable d’un facteur de transmission de la lumière et une perte de l’éclairage peuvent être évitées plus efficacement que dans le cas où un prisme est utilisé pour basculer d'un parcours lumineux à un autre. [RÉSOLUTION DES PROBLÈMES] Le dispositif de bascule du parcours lumineux (10) décrit utilise la réflexion de la lumière d’une paire de miroirs (71, 72) pour faire basculer un parcours lumineux d’un faisceau lumineux (11). Les miroirs (71, 72) sont déplacés sur le parcours lumineux par un actionneur d’entraînement (76) avec leurs surfaces de réflexion (71r, 72r) maintenues parallèles les unes aux autres par un élément de fixation de miroir, de sorte que le déplacement ne nécessite pas de précision.
PCT/JP2005/013354 2004-07-21 2005-07-21 Dispositif de bascule de parcours lumineux Ceased WO2006009191A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2004-213046 2004-07-21
JP2004213046 2004-07-21

Publications (1)

Publication Number Publication Date
WO2006009191A1 true WO2006009191A1 (fr) 2006-01-26

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PCT/JP2005/013354 Ceased WO2006009191A1 (fr) 2004-07-21 2005-07-21 Dispositif de bascule de parcours lumineux

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009198828A (ja) * 2008-02-21 2009-09-03 Toshiba Corp 光ロータリジョイント
CN114353961A (zh) * 2021-12-01 2022-04-15 北京仿真中心 一种红外宽波段大动态复杂成像目标与干扰仿真装置
CN119757218A (zh) * 2025-02-14 2025-04-04 无锡迅杰光远科技有限公司 一种固定光路五工位切换光谱采集系统

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5525023A (en) * 1978-08-09 1980-02-22 Kokusai Denshin Denwa Co Ltd <Kdd> Photo switch
JPS6457225A (en) * 1987-08-28 1989-03-03 Matsushita Electric Industrial Co Ltd Optical switch

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5525023A (en) * 1978-08-09 1980-02-22 Kokusai Denshin Denwa Co Ltd <Kdd> Photo switch
JPS6457225A (en) * 1987-08-28 1989-03-03 Matsushita Electric Industrial Co Ltd Optical switch

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009198828A (ja) * 2008-02-21 2009-09-03 Toshiba Corp 光ロータリジョイント
CN114353961A (zh) * 2021-12-01 2022-04-15 北京仿真中心 一种红外宽波段大动态复杂成像目标与干扰仿真装置
CN119757218A (zh) * 2025-02-14 2025-04-04 无锡迅杰光远科技有限公司 一种固定光路五工位切换光谱采集系统

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