CN102621643A - Single-core bidirectional optical communication module and manufacturing method thereof - Google Patents
Single-core bidirectional optical communication module and manufacturing method thereof Download PDFInfo
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Abstract
The invention aims to provide a single-core bidirectional optical communication module (1), so as to achieve light output with high precision by adjusting an incident angle of lights that are emitted to a wavelength limiting filter (21) to be lower than an allowable error angle. An angle formed by the wavelength limiting filter (21) and an optical axis of a first lens (71) is adjusted by arranging the wavelength limiting filter (21) at a prescribed angle relative to a plane orthogonal to the optical axis of the first lens (71). In addition, the wavelength limiting filter (21) is adjusted around the optical axis of the first lens (71) by rotating the wavelength limiting filter (21) around the optical axis of the first lens (71). In this way, the incident angle of lights that are emitted to the wavelength limiting filter (21) is adjusted to be lower than an allowable error angle.
Description
Technical field
The present invention relates to a kind of uni-core bidirectional optical communications module and manufacturing approach thereof of using an optical fiber bidirectional transmitting-receiving light signal.
Background technology
Increase along with the information communication amount; In the field of optical communication system; Popularize wavelength division multiplexing communications (WDM:Wavelength Division Multiplexing), further promoted the high capacity of the traffic as high-speed high capacity communication with a plurality of wavelength optical signals of Optical Fiber Transmission.
The uni-core bidirectional optical communications module that is used in wavelength division multiplexing communications is disclosed in patent documentation 1.Be optical module a kind of and a fiber optics coupling, optical fiber, luminescent device, sensitive device, wave-division multiplexer filter and wavelength restriction filter (wavelength system limit Off イ Le タ: wavelength limitingfilter) interfix by housing.
In above-mentioned housing, be formed with first endoporus, second endoporus and wave filter and use endoporus.End at first endoporus that connects along the central axis direction of above-mentioned housing is equipped with above-mentioned optical fiber, at the other end above-mentioned luminescent device is installed, and at an end of above-mentioned second endoporus that intersects with above-mentioned first endoporus above-mentioned sensitive device is installed.And, be formed with above-mentioned wave filter across with above-mentioned first endoporus and above-mentioned second endoporus and use endoporus.
Above-mentioned luminescent device penetrates the light of first wavelength, the above-mentioned wave-division multiplexer filter of above-mentioned light transmission and incide above-mentioned optical fiber.The light of second wavelength that penetrates from above-mentioned optical fiber in addition, is by above-mentioned wave-division multiplexer filter reflection and see through above-mentioned wavelength restriction filter and received by above-mentioned sensitive device.
At the front end of cylinder roughly anchor clamps are arranged, these anchor clamps are formed with along its central axis direction and cut above-mentioned cylinder and the plane (wave filter carries the face of putting) that obtains, carry at above-mentioned wave filter and carry above-mentioned wave-division multiplexer filter on the face of putting.
And above-mentioned anchor clamps are inserted into above-mentioned wave filter and use endoporus, and above-mentioned wave-division multiplexer filter is configured in above-mentioned first endoporus, above-mentioned second endoporus and above-mentioned wave filter with the cross one another position of endoporus.Then, rotate around central shaft, adjust its angle and make each optical axis of light of light and above-mentioned second wavelength of reflecting surface and above-mentioned first wavelength of above-mentioned wave-division multiplexer filter form the angle (for example 45 °) of regulation through making above-mentioned anchor clamps.
In addition, above-mentioned wavelength restriction filter is configured to stop up above-mentioned second endoporus between above-mentioned wave-division multiplexer filter and above-mentioned sensitive device, interdicts the light of above-mentioned first wavelength and makes the light transmission of above-mentioned second wavelength.
Patent documentation 1: TOHKEMY 2010-91824 communique
The problem that invention will solve
The wavelength restriction filter has the incident angle dependence of light.When light vertical incidence (incident angle ± 0 °) during, the light transmission of the wavelength band of regulation to above-mentioned wavelength restriction filter, the optical attenuation of wavelength band in addition and almost can not seeing through.But, when the incident angle of light deviates from vertically (incident angle ± 0 °), seeing through the wavelength band that band deviates from above-mentioned expectation, sensitive device receives the light beyond the wavelength band of above-mentioned expectation.
In addition, the reflection characteristic of wave-division multiplexer filter and see through characteristic and have the incident angle dependence of light.Thereby, need critically adjust the reflecting surface of above-mentioned wave-division multiplexer filter with respect to the optical axis of light (penetrate light, incident light).
The interval of a plurality of different wavelengths of sending in the wavelength division multiplexing communications is narrow.Particularly in dense wave division multipurpose (DWDM:Dense Wavelength Division Multiplexing) communication; Corresponding with the frequency interval of 100GHz or 50GHz; Therefore the interval of a plurality of wavelength very narrow (approximately 0.8nm) incides the very strictness of requirement of precision of the angle (incident angle) of wavelength restriction filter and wave-division multiplexer filter for light.
In patent documentation 1 disclosed prior art, rotate around central shaft through making the anchor clamps that carried wave-division multiplexer filter, adjust the angle (incident angle) that light incides above-mentioned wave-division multiplexer filter.But, though in this adjustment, can adjust angle, can't carry out adjustment around optical axis with respect to optical axis, therefore insufficient.
Light beyond the wavelength band of the expectation of therefore, penetrating from optical fiber is incided above-mentioned wavelength restriction filter by above-mentioned wave-division multiplexer filter reflection.
In addition; In patent documentation 1 disclosed prior art; Do not carry out the adjustment of the incident angle of above-mentioned wavelength restriction filter; Can't carry out above-mentioned adjustment, the above-mentioned wavelength restriction filter of above-mentioned light transmission beyond the wavelength band of the expectation of therefore on above-mentioned wave-division multiplexer filter, reflecting and being received by sensitive device around optical axis.
Therefore, in patent documentation 1 disclosed prior art, have following problem: sensitive device receives the above-mentioned light beyond the wavelength band of expecting and becomes noise, can't obtain high-precision signal output.
Summary of the invention
The present invention accomplishes in view of this problem, and its purpose is to provide a kind of uni-core bidirectional optical communications module, and the incident angle that incides the light of wavelength restriction filter through adjustment critically can access high-precision signal output.
The scheme that is used to deal with problems
Uni-core bidirectional optical communications module of the present invention is characterised in that to have the optical module of receiving, and this is comprised by optical module: sensitive device receives light; The wavelength restriction filter limits the above-mentioned light that sees through according to wavelength; And first lens; To arrive above-mentioned sensitive device through the above-mentioned optical convergence of above-mentioned wavelength restriction filter; Above-mentioned first lens are arranged between above-mentioned wavelength restriction filter and the above-mentioned sensitive device; Above-mentioned wavelength restriction filter is configured to respect to the angle that becomes regulation with the planar shaped of the light shaft positive cross of above-mentioned first lens, through the optical axis rotation of above-mentioned wavelength restriction filter around above-mentioned first lens, adjusts the incident angle of the above-mentioned light that incides above-mentioned wavelength restriction filter.
Be configured to adjust the formed angle of optical axis of above-mentioned wavelength restriction filter and above-mentioned first lens through the wavelength restriction filter with respect to the angle that becomes regulation with the planar shaped of the light shaft positive cross of above-mentioned first lens.In addition, through making of the optical axis rotation of above-mentioned wavelength restriction filter, adjust above-mentioned wavelength restriction filter around the optical axis of above-mentioned first lens around above-mentioned first lens.
Like this, can critically adjust the incident angle of the light that incides above-mentioned wavelength restriction filter.
Therefore,, can critically adjust the above-mentioned incident angle of the light that incides above-mentioned wavelength restriction filter, therefore the uni-core bidirectional optical communications module that can access high-precision signal output can be provided according to the present invention.
Have first housing of accommodating above-mentioned wavelength restriction filter, the rotation through said first shell realizes the optical axis rotation of above-mentioned wavelength restriction filter around above-mentioned first lens.
Under the situation of this mode; Can directly utilize high performance measurement mechanism to measure on one side and adjust on one side, therefore can adjust above-mentioned wavelength restriction filter easily and critically around the optical axis of above-mentioned first lens from above-mentioned wave-division multiplexer filter reflection and through the light of said first shell.
Have first housing of accommodating above-mentioned wavelength restriction filter and accommodate above-mentioned sensitive device and second housing of above-mentioned first lens, rotate through the one of said first shell and above-mentioned second housing and realize of the optical axis rotation of above-mentioned wavelength restriction filter around above-mentioned first lens.
Under the situation of this mode; Said first shell and above-mentioned second housing are rotated with being integral; Utilize above-mentioned sensitive device to measure the light that reflects and see through above-mentioned wavelength restriction filter from above-mentioned wave-division multiplexer filter on one side, Yi Bian adjust, therefore easy and efficient.
Preferably, have: first linking part links an optical fiber; Second lens make the light that penetrates from above-mentioned optical fiber become directional light; Wave-division multiplexer filter reflects above-mentioned directional light to above-mentioned wavelength restriction filter; And the 3rd housing; Accommodate above-mentioned second lens and above-mentioned wave-division multiplexer filter; Be provided with in interior all sides of the outer wall of said first shell and first of above-mentioned wavelength restriction filter be set face is set; Outer circumferential side at the outer wall of said first shell is provided with first installed surface, and above-mentioned first is provided with the angle that face and above-mentioned first installed surface form afore mentioned rules, is provided with second installed surface at the outer circumferential side of the outer wall of above-mentioned the 3rd housing; Above-mentioned second installed surface is and the plane of the light shaft positive cross of above-mentioned first lens, makes above-mentioned first installed surface and above-mentioned second installed surface carry out the rotation of said first shell abreast.
The angle that above-mentioned first of above-mentioned wavelength restriction filter is provided with face and above-mentioned first installed surface formation afore mentioned rules is set; Above-mentioned first installed surface is that above-mentioned second installed surface is relative with the plane that is orthogonal to the optical axis of above-mentioned first lens, and therefore above-mentioned wavelength restriction filter is configured to form with respect to the optical axis of above-mentioned first lens angle of regulation.
In addition, the rotation that makes above-mentioned first installed surface and above-mentioned second installed surface carry out said first shell abreast is meant the optical axis rotation of above-mentioned wavelength restriction filter around above-mentioned first lens.
Therefore, under the situation of this mode, can critically adjust the incident angle that reflects and incide the light of above-mentioned wavelength restriction filter from above-mentioned wave-division multiplexer filter.
Preferably, a plurality of above-mentioned optical modules that receive are coupled through above-mentioned wave-division multiplexer filter and above-mentioned second lens and above-mentioned fiber optics respectively, and a plurality of above-mentioned optical modules that receive are installed on above-mentioned the 3rd housing.
Under the situation of this mode,, can realize receiving the uni-core bidirectional optical communications module of a plurality of light signals through a plurality of above-mentioned optical modules that receive are installed.
The manufacturing approach of uni-core bidirectional optical communications module of the present invention is characterised in that; Above-mentioned uni-core bidirectional optical communications module has: the 3rd housing, and accommodating the light that makes from an optical fiber becomes second lens of directional light and the wave-division multiplexer filter of the above-mentioned directional light of reflection; With first housing; Accommodate according to wavelength and limit incident light wavelength restriction filter; The manufacturing approach of above-mentioned uni-core bidirectional optical communications module is characterised in that, comprises following operation: the interior all sides that above-mentioned second lens and above-mentioned wave-division multiplexer filter are fixed on the outer wall of above-mentioned the 3rd housing; Measurement is in the formed angle of working direction of the above-mentioned directional light that normal and above-mentioned wave-division multiplexer filter reflected of the second set installed surface of the outer circumferential side of the outer wall of above-mentioned the 3rd housing; The following said first shell of preparing; Outer circumferential side at the outer wall of said first shell is provided with first installed surface; Be provided with first in interior all sides of this outer wall face be set, above-mentioned first installed surface and above-mentioned first angle and the measured above-mentioned angle of the formed regulation of face is set or the difference of angle that measured above-mentioned angle is obtained with proofreading and correct the angle addition little; And make above-mentioned first installed surface and above-mentioned second installed surface make the said first shell rotation in parallel; Angle with the output that obtains expecting for the above-mentioned directional light that incides above-mentioned wavelength restriction filter is fixed on said first shell on above-mentioned the 3rd housing.
Under the situation of this mode, adjust the formed angle of optical axis of above-mentioned wavelength restriction filter and above-mentioned first lens, in addition, adjust around the optical axis of above-mentioned first lens.
Like this, can critically adjust the incident angle of the light that incides above-mentioned wavelength restriction filter.
Like this, a kind of manufacturing approach of uni-core bidirectional optical communications module can be provided, critically adjust from reflection of above-mentioned wave-division multiplexer filter and the incident angle that incides the light of above-mentioned wavelength restriction filter and can access high-precision signal output.
The effect of invention
Be configured to adjust the formed angle of optical axis of wavelength restriction filter and above-mentioned first lens through the wavelength restriction filter with respect to the angle that becomes regulation with the planar shaped of the light shaft positive cross of first lens.In addition, be rotated around the optical axis of above-mentioned first lens, carry out adjustment around the angle of the optical axis of above-mentioned first lens through above-mentioned wavelength restriction filter.
Like this, can critically adjust the incident angle that reflects and incide the light of above-mentioned wavelength restriction filter from wave-division multiplexer filter.
Therefore,, can critically adjust the incident angle of the light that incides the wavelength restriction filter, therefore a kind of uni-core bidirectional optical communications module that can access high-precision signal output can be provided according to the present invention.
Description of drawings
Fig. 1 is the cross section sketch map as the uni-core bidirectional optical communications module 1 of first embodiment.
Fig. 2 is the key diagram of the manufacturing approach of first embodiment.
Fig. 3 is the key diagram of incident angle method of adjustment of the wavelength restriction filter 21 of first embodiment.
Fig. 4 is the key diagram of incident angle method of adjustment of the wavelength restriction filter 21 of first embodiment.
Fig. 5 is the key diagram that sees through characteristic of the wavelength restriction filter 21 of expression first embodiment.
Fig. 6 is the enlarged drawing of Fig. 5.
Fig. 7 is the key diagram of manufacturing approach of first housing 81 of first embodiment.
Fig. 8 is the key diagram of incident angle method of adjustment of the wavelength restriction filter 21 of first embodiment.
Fig. 9 is the cross section sketch map as the uni-core bidirectional optical communications module 2 of the 3rd embodiment.
Figure 10 is the cross section sketch map as the uni-core bidirectional optical communications module 3 of the 4th embodiment.
Description of reference numerals
1: the uni-core bidirectional optical communications module; 21: the wavelength restriction filter; 22: the second wavelength restriction filters; 31: wave-division multiplexer filter; 32: the second wave-division multiplexer filters; 41: sensitive device; 42: the second sensitive devices; 50: luminescent device; 60: optical fiber; 71: the first lens; 72: the second lens; 73: the three lens; 74: the four lens; 81: the first housings; 81a: protuberance; 81b: first installed surface; 81c: first is provided with face; 82: the second housings; 83: the three housings; 83a: recess; 83b: second installed surface; 83c: second is provided with face; 83d: first through hole; 83e: second through hole; 83f: the 3rd through hole; 83g: sensitized paper; 83h: colour developing point; 83i: take measurement of an angle; 84: the four housings; 85: the five housings; 86: the six housings; 87: the seven housings; 91: the first linking parts; 92: the second linking parts; 99: optical sensor.
Embodiment
< first embodiment >
Below, first embodiment of the present invention is described.Fig. 1 is the cross section sketch map as the uni-core bidirectional optical communications module 1 of first embodiment of the present invention.Uni-core bidirectional optical communications module 1 possesses optical fiber 60, second lens 72, wave-division multiplexer filter 31, wavelength restriction filter 21, first lens 71, sensitive device 41, the 3rd lens 73 and luminescent device 50.
Linking in a side of the relative face of the 3rd housing 83 has first linking part 91, and linking at opposite side has second linking part 92.Optical fiber 60 is embedded into first linking part 91 and is bonded, and luminescent device 50 is embedded into second linking part 92 and is bonded.And the 3rd housing 83 contains second lens 72, wave-division multiplexer filter 31 and the 3rd lens 73 between optical fiber 60 and luminescent device 50.
At this moment, link the 3rd housing 83, first linking part 91 and second linking part 92 with the mode of luminescent device 50, the 3rd lens 73, wave-division multiplexer filter 31, second lens 72 and optical fiber 60 optical coupled.
And, first housing 81 and second housing 82 and second linking part 92, the 3rd housing 83 and first linking part, 91 cross-over configuration.
Wave-division multiplexer filter 31 is configured to and each optical axis formation desired angle (for example 45 °) in the position that the optical axis of the optical axis of the optical axis of second lens 72 and optical fiber 60, first lens 71 and sensitive device 41 and the 3rd lens 73 and luminescent device 50 intersects.
In addition, wave-division multiplexer filter 31 has following characteristic: the laser of above-mentioned first wavelength is seen through, reflect the laser of above-mentioned second wavelength.
The manufacturing approach of instruction book core bidirectional optical module 1 and the incident angle method of adjustment that incides the laser of wavelength restriction filter 21.
Shown in Fig. 2 (a), prepare the 3rd housing 83, second lens 72, the 3rd lens 73 and wave-division multiplexer filter 31.
Shown in Fig. 2 (b); Interior all sides at the outer wall of the 3rd housing 83; Part through the outer wall inside surface of pruning forms second of inclination face 83c is set, and at the outer wall of the 3rd housing 83, the first through hole 83d, the second through hole 83e and the 3rd through hole 83f connect outer wall and form.
Shown in Fig. 2 (c), be provided with on the face 83c that coating adhesive is provided with and fixing wave-division multiplexer filter 31 second.In addition, on the second through hole 83e of relatively configuration and the 3rd through hole 83f through fixing respectively second lens 72 and the 3rd lens 73 such as laser bonding.
Shown in Fig. 2 (d), in first linking part 91, embed optical fiber 60 and wait and fix through laser bonding, in second linking part 92, embed luminescent device 50 and wait and fix through laser bonding.Then, on the 3rd housing 83, fix first linking part 91 and second linking part 92 through laser bonding etc.
As shown in Figure 3, the laser of second wavelength is incided optical fiber 60, penetrate towards second lens 72 from optical fiber 60.The laser of above-mentioned second wavelength becomes directional light through second lens 72,, and is penetrated to the outside of the 3rd housing 83 from the first through hole 83d to the direction reflection that roughly becomes 90 ° with respect to incident direction by wave-division multiplexer filter 31.At this moment, the beam diameter of the laser of above-mentioned second wavelength is 0.5mm～1.0mm.
As shown in Figure 4, under the surface of the sensitized paper 83g that develops the color with the laser reactive of above-mentioned second wavelength and the back side state parallel, move sensitized paper 83g with mode away from the second installed surface 83b with the second installed surface 83b of the 3rd housing 83.Then; Use tan (tan (θ)); According to move from the second installed surface 83b distance (V) of sensitized paper 83g and the colour developing point 83h of sensitized paper 83g (distance (L) that diameter: 0.5mm～1.0mm) laterally moves, calculate the normal of the second installed surface 83b with by the formed angle of working direction of the laser of above-mentioned second wavelength of wave-division multiplexer filter 31 reflections.This angle is called the 83i that takes measurement of an angle.In addition, so that the second installed surface 83b becomes with the mode of the face of the light shaft positive cross of first lens 71 first lens 71 are installed in subsequent handling.
If the fixing etc. of bonding, the wave-division multiplexer filter 31 of the 3rd housing 83 that the second installed surface 83b and second of the 3rd housing 83 is provided with the processing of face 83c, carry out through laser bonding etc. and first linking part 91, second lens 72 and optical fiber 60 accomplished by design error freely, the 83i that then takes measurement of an angle is 0 °.
Be designed to: wavelength restriction filter 21 sees through the laser of second wavelength, and the laser that sensitive device 41 receives above-mentioned second wavelength obtains signal output.But wavelength restriction filter 21 has the incident angle dependence of laser.When the incident angle of laser deviates from vertically (incident angle ± 0 °), see through wavelength restriction filter 21 with the laser of the laser different wavelengths of above-mentioned second wavelength.
In the wavelength division multiplexing communications as the application of uni-core bidirectional optical communications module, the interval of a plurality of different wavelengths of transmission is narrow.Particularly in dense wave division multipurpose communication, corresponding with the frequency interval of 100GHz or 50GHz, therefore the interval of a plurality of wavelength very narrow (approximately 0.8nm).
The restriction filter of wavelength shown in Fig. 5 21 see through characteristic.Transverse axis is wavelength (nm), and the longitudinal axis is transmitance (%).A, B, C represent respectively 0 ° of incident angle, 0.5 °, 1.0 ° see through characteristic.In addition, E, D represent that centre wavelength is the wavelength band of the channel of 1551.72nm or 1552.52nm.Respectively with centre wavelength ± 0.3nm is set at wavelength band.
The figure that shown in Fig. 6 the part of Fig. 5 is amplified.The transmitance of the light of in the first embodiment, adjacent channel (%) allows to 0.1%.Observe Fig. 5, centre wavelength is that the transmitance (%) of the end (channeling side of centre wavelength 1552.52nm) of the channel of 1551.72nm is respectively 0.018%, 0.027% in A, B, all is below 0.1%, is 0.12% among the C, surpasses 0.1%.
Hence one can see that, if the incident angle of laser to wavelength restriction filter 21 is set at below 0.5 °, then can the transmitance (%) of the light of adjacent channel be set at below 0.1% with having surplus.In view of the above, laser is set to 0.5 ° to the allowable error angle of the incident angle of wavelength restriction filter 21.
Therefore; If the incident angle of laser becomes greatly to allowable error angle more than 0.5 °; When then second wavelength being made as 1552.52nm, adjacent with the channel that is centre wavelength with above-mentioned second wavelength, its centre wavelength is that the laser of the channel of 1553.32nm or 1551.72nm sees through wavelength restriction filter 21 with transmitance (%) more than 0.1%.Sensitive device 41 receives this laser that sees through, and produces signal output, and generation receives the corresponding noise of light intensity with it thus.
Shown in Fig. 7 (a), be formed with protuberance 81a in the outside of the outer wall of first housing 81, be formed with the first installed surface 81b in the periphery of protuberance 81a.And in the inboard of the above-mentioned outer wall of first housing 81, the part of the inside surface through the above-mentioned outer wall of pruning forms to be had the face and outstanding first that forms the angle of regulation with the first installed surface 81b face 81c is set.
And the angle of preparing afore mentioned rules in advance is a plurality of first housings 81 of 0 °, 0.5 °, 1.0 °, 1.5 °, 2.0 °, and selecting the absolute value of the difference of the angle of afore mentioned rules and the 83i that takes measurement of an angle is first housing 81 of allowable error angle below 0.5 °.Therefore, the angle of afore mentioned rules can be the value of 0.5 ° of the 83i that takes measurement of an angle ± allowable error angle.And, shown in Fig. 7 (b), be provided with first that coating adhesive fixes wavelength restriction filter 21 on the face 81c.
As for by the countermeasure of the back light of wavelength restriction filter 21 reflections, the situation that makes wavelength restriction filter 21 slant correction angles is arranged.At this moment; A plurality of first housings 81 of the value that the angle of preparing in advance afore mentioned rules obtains for high-ranking officers' positive-angle and 0 °, 0.5 °, 1.0 °, 1.5 °, 2.0 ° additions, the angle of selecting afore mentioned rules is first housing 81 of allowable error angle below 0.5 ° with the absolute value of the difference of the 83i angle that addition obtains with the correction angle that will take measurement of an angle.Then, shown in Fig. 7 (b), first be provided with that coating adhesive fixes wavelength restriction filter 21 on the face 81c at this.Like this, the angle of afore mentioned rules becomes the value that the 83i+ that takes measurement of an angle proofreaies and correct 0.5 ° of angle ± allowable error angle.Like this, incided wavelength restriction filter 21 by wave-division multiplexer filter 31 laser light reflected for 0.5 ° to proofread and correct angle ± allowable error angle.
Like this, wavelength restriction filter 21 is configured to respect to the second installed surface 83b, promptly form with the plane of the light shaft positive cross of first lens 71 angle of afore mentioned rules.
In foregoing, explained that first is provided with face 81c and has the face that forms the angle of afore mentioned rules with the first installed surface 81b.It is not necessary having this face.As long as be arranged on first the angle that wavelength restriction filter 21 on the face 81c can form afore mentioned rules with the first installed surface 81b being set, can be other structure also just.
But, when first housing 81 is attached to the 3rd housing 83 through the first installed surface 81b and the second installed surface 83b being offseted fetch, need adjusts first housing 81, be wavelength restriction filter 21 around the normal of the second installed surface 83b.In fact, through carrying out this adjustment, by wave-division multiplexer filter 31 laser light reflected with vertical (incident angle ± 0 °) ± 0.5 ° of allowable error angle or proofread and correct angle ± allowable error angle and incide wavelength restriction filter 21 for 0.5 °.Carry out this explanation below.
As shown in Figure 8, with the laser of second wavelength (for example 1552.52nm) (seeing through wavelength), incide optical fiber 60 as the 1551.72nm (blocking wavelength) of the wavelength adjacent and the laser of 1553.32nm (blocking wavelength) with second wavelength.Then, the above-mentioned laser that penetrates from optical fiber 60 is reflected by wave-division multiplexer filter 31.Above-mentioned laser sees through wavelength restriction filter 21, and (ア De バ Application ス テ ス ト system for example: Q82215) receives, the generation signal is exported thereby be set at the optical sensor 99 in the outside of wavelength restriction filter 21.ア De バ Application ス テ ス ト system optical sensor (Q82215) can detect the light of the wavelength coverage of 800nm～1750nm.
As shown in Figure 8; The process of measuring the above-mentioned laser that sees through wavelength restriction filter 21 through optical sensor 99 is following: the protuberance 81a that will be formed on first housing 81 is inserted into the recess 83a that is formed on the 3rd housing 83; The first installed surface 81b that is formed on around the protuberance 81a and the second installed surface 83b that is formed on around the recess 83a are connected; First housing 81 is rotated on one side, Yi Bian measure.Obtain maximum output and be to stop the rotation in the angle place that the laser of 1551.72nm (blocking wavelength) and 1553.32nm (blocking wavelength) obtains minimum output at the laser through second wavelength (seeing through wavelength), first housing 81 is fixed to the 3rd housing 83 through laser bonding etc. through its wavelength.
Like this, through making the optical axis rotation of wavelength restriction filter 21, adjusted the incident angle of laser around first lens 71.
In sum; In the first embodiment; Wavelength restriction filter 21 is configured to respect to the angle that becomes regulation with the planar shaped of the light shaft positive cross of first lens 71; Wavelength restriction filter 21 is rotated through the optical axis around first lens 71, adjusts the incident angle of the laser that incides wavelength restriction filter 21.
More than, incide the angle of the light of wavelength restriction filter 21 around the optical axis adjustment of first lens 71 from wave-division multiplexer filter 31 with respect to the optical axis of first lens 71, therefore can carry out accurate adjustment.In addition, through said method, above-mentioned incident angle is adjusted to perpendicular to wavelength restriction filter 21 (incident angle ± 0 °) in the scope of allowable error angle below 0.5 ° or proofreaies and correct angle.
Like this, can critically adjust the incident angle of the laser that incides wavelength restriction filter 21, therefore the uni-core bidirectional optical communications module 1 and the manufacturing approach thereof that can access high-precision signal output can be provided.At this, high-precision signal output is meant the output of the high S/N ratio that noise is few.
In patent documentation 1 disclosed prior art, rotate around central shaft through making the anchor clamps that carried wave-division multiplexer filter, adjust the angle (incident angle) that light incides above-mentioned wave-division multiplexer filter.But, though this method can be adjusted the angle with respect to optical axis, can't carry out adjustment around optical axis, therefore insufficient.Above-mentioned wave-division multiplexer filter has the laser of reflection second wavelength and makes the characteristic that sees through with the adjacent laser of above-mentioned second wavelength.But because the incident angle adjustment is insufficient, therefore adjacent with above-mentioned second wavelength above-mentioned laser is to the reflection of wavelength restriction filter and incide above-mentioned wavelength restriction filter.
In addition, in patent documentation 1 disclosed prior art, be directed against the adjustment of above-mentioned wavelength restriction filter of the incident angle of light.Therefore, seen through above-mentioned wavelength restriction filter, received and produce noise by sensitive device by the above-mentioned laser adjacent of above-mentioned wave-division multiplexer filter reflection with second wavelength.
In patent documentation 1 disclosed prior art, the wave-division multiplexer filter of the substantial middle through being positioned at housing carries out the adjustment of incident angle of the light of incident.Therefore, above-mentioned wave-division multiplexer filter is installed, above-mentioned wave-division multiplexer filter is adjusted with the substantial middle that endoporus is inserted into housing from wave filter at the front end of the anchor clamps of cylinder roughly.Therefore, therefore the adjustment that above-mentioned anchor clamps are rotated around central shaft does not carry out the adjustment of light around optical axis.
In view of this, in the first embodiment, the wavelength restriction filter 21 of the side through being installed in the 3rd housing 83 incides the adjustment of incident angle of the laser of wavelength restriction filter 21.Wavelength restriction filter 21 is installed in the side of the 3rd housing 83; Can utilize optical sensor 99 to measure the laser that sees through thus on one side; Make the optical axis rotation of wavelength restriction filter 21 on one side, can adjust easily and critically around the optical axis of first lens 71 around first lens 71.
After first housing 81 was attached to the 3rd housing 83, second housing 82 of accommodating first lens 71 and sensitive device 41 was attached to first housing 81.At this moment, so that the second installed surface 83b becomes the mode with the plane of the light shaft positive cross of first lens 71, the 3rd housing 83 that is formed with the second installed surface 83b is connected with linearity with second housing 82 of accommodating first lens 71.
In addition, make it possible to utilize high performance optical sensor 99 to measure the above-mentioned laser that sees through through following mode: wavelength restriction filter 21 and first lens 71 and sensitive device 41 are housed in first housing 81 and second housing 82 respectively.
< second embodiment >
Then, the manufacturing approach of second embodiment and the incident angle method of adjustment that incides the laser of wavelength restriction filter 21 are described.
On the 3rd housing 83, link first linking part 91 and second linking part 92, in first linking part 91, embed optical fiber 60, embedding luminescent device 50 and fixing in second linking part 92.Then, the 83i that takes measurement of an angle, select to possess with the 83i that takes measurement of an angle suitable corresponding first face 81c is set first housing 81, first fixed wave length restriction filter 21 on the face 81c is set.Manufacturing approach so far is identical with first embodiment.
Then, second housing 82 of accommodating first lens 71 and sensitive device 41 is attached to first housing 81.Like this, first housing 81 and second housing 82 are linked to form receive optical module.
The protuberance 81a that is formed on first housing 81 is inserted into the recess 83a that is formed on the 3rd housing 83, the first installed surface 81b that is formed on around the protuberance 81a and the second installed surface 83b that is formed on around the recess 83a are connected.At this moment, the laser with second wavelength (for example 1552.52nm) incides optical fiber 60.The above-mentioned laser of second wavelength penetrates from optical fiber 60, and is seen through wavelength restriction filter 21 by wave-division multiplexer filter 31 reflections, is converged to the light accepting part of sensitive device 41 through first lens 71.Then, from sensitive device 41 output signal outputs.
At this moment, under the state that the first installed surface 81b and the second installed surface 83b are connected, make above-mentionedly to receive optical module rotation and stop being output as maximum angle place from sensitive device 41, the above-mentioned optical module that receives is fixed to the 3rd housing 83 through laser bonding etc.
Under the situation of this mode; First housing 81 and second housing 82 are rotated with being integral; Utilize sensitive device 41 to measure on one side and also see through the light of wavelength restriction filter 21 from wave-division multiplexer filter 31 incidents, Yi Bian adjust, therefore easy and efficient.
< the 3rd embodiment >
Then, the 3rd embodiment is described.Shown in Fig. 9 as the cross section sketch map of the uni-core bidirectional optical communications module 2 of the 3rd embodiment.As shown in Figure 9, linking in a side of the long axis direction of the 6th housing 86 has first linking part 91, and linking at opposite side has second linking part 92.Optical fiber 60 is embedded into first linking part 91 and is bonded, and luminescent device 50 is embedded into second linking part 92 and is bonded.And the 6th housing 86 contains second lens 72, wave-division multiplexer filter 31, second wave-division multiplexer filter 32 and the 3rd lens 73 between optical fiber 60 and luminescent device 50.
Side at the 6th housing 86 links first housing 81 of accommodating wavelength restriction filter 21, on first housing 81, links second housing 82 of accommodating first lens 71 and sensitive device 41.
In addition, link the 4th housing 84 of accommodating the second wavelength restriction filter 22, on the 4th housing 84, link the 5th housing 85 of accommodating the 4th lens 74 and second sensitive device 42 in the side of the 6th housing 86.
Second sensitive device 42 is photo detectors such as photodiode.Second sensitive device 42 receives the laser that penetrates from optical fiber 60.And this Wavelength of Laser is different with second wavelength (for example 1552.52nm) that sensitive device 41 receives, and for example is three-wavelength.Three-wavelength for example is 1551.72nm or 1553.32nm.
Become directional light from the laser of the three-wavelength of optical fiber 60 incidents through second lens 72; See through wave-division multiplexer filter 31 and seen through the second wavelength restriction filter 22, converged to the light accepting part of second sensitive device 42 through the 4th lens 74 by 32 reflections of second wave-division multiplexer filter.
At this moment, wavelength restriction filter 21 has that the laser that makes second wavelength sees through and the characteristic of laser of interdicting the laser and the three-wavelength of first wavelength.In addition, the second wavelength restriction filter 22 has that the laser that makes three-wavelength sees through and the laser and second characteristic of laser of interdicting first wavelength.
Wave-division multiplexer filter 31 has the laser of reflection second wavelength and makes the laser of first wavelength and the characteristic that the 3rd laser sees through.In addition, second wave-division multiplexer filter 32 has the laser of reflection three-wavelength and makes the laser of first wavelength and the characteristic that second laser sees through.
The sensitive device 41 and second sensitive device 42 are in the relative side alternate configurations of the 6th housing 86, respectively through the wave-division multiplexer filter 31 and second wave-division multiplexer filter 32 and optical fiber 60 optical coupled.
And, with the relative side of a plurality of sensitive device alternate configurations, can carry a plurality of sensitive devices as stated with this at housing.
The 3rd embodiment is except having appended second wave-division multiplexer filter 32, the second wavelength restriction filter 22, the 4th lens 74 and second sensitive device 42 etc., and is identical with first embodiment or second embodiment on incident angle method of adjustment that incides the wavelength restriction filter 21 and the laser of the second wavelength restriction filter 22 etc.
< the 4th embodiment >
The 4th embodiment is described below.Shown in Figure 10 as the cross section sketch map of the uni-core bidirectional optical communications module 3 of the 4th embodiment.Shown in figure 10, linking in a side of the long axis direction of the 7th housing 87 has first linking part 91, and linking at opposite side has second linking part 92.Optical fiber 60 is embedded into first linking part 91 and is fixed, and luminescent device 50 is embedded into second linking part 92 and is fixed.And the 7th housing 87 contains second lens 72, wave-division multiplexer filter 31, second wave-division multiplexer filter 32 and the 3rd lens 73 between optical fiber 60 and luminescent device 50.
The sensitive device 41 and second sensitive device 42 are in the same side alternate configurations of the 7th housing 87, respectively through the wave-division multiplexer filter 31 and second wave-division multiplexer filter 32 and optical fiber 60 optical coupled.
The 4th embodiment is except the allocation position of second sensitive device 42, the 4th lens 74, the second wavelength restriction filter 22 and second wave-division multiplexer filter 32 etc., and is roughly the same with the 3rd embodiment.
And, as stated with a plurality of sensitive device alignment arrangements in the same side of housing, can carry a plurality of sensitive devices with this.
In the 3rd embodiment and the 4th embodiment, respectively with a plurality of sensitive device alignment arrangements in relative side or same side.The configuration of a plurality of sensitive devices is not limited to this configuration, also can be that other disposes arbitrarily.
Claims (7)
1. a uni-core bidirectional optical communications module is characterized in that,
Have the optical module of receiving, this is comprised by optical module: sensitive device receives light; The wavelength restriction filter limits the above-mentioned light that sees through according to wavelength; And first lens, will be through the above-mentioned optical convergence of above-mentioned wavelength restriction filter to above-mentioned sensitive device,
Above-mentioned first lens are arranged between above-mentioned wavelength restriction filter and the above-mentioned sensitive device; Above-mentioned wavelength restriction filter is configured to respect to the angle that becomes regulation with the planar shaped of the light shaft positive cross of above-mentioned first lens; Through of the optical axis rotation of above-mentioned wavelength restriction filter, adjust the incident angle of the above-mentioned light that incides above-mentioned wavelength restriction filter around above-mentioned first lens.
2. uni-core bidirectional optical communications module according to claim 1 is characterized in that,
Have first housing of accommodating above-mentioned wavelength restriction filter,
Rotation through said first shell realizes the optical axis rotation of above-mentioned wavelength restriction filter around above-mentioned first lens.
3. uni-core bidirectional optical communications module according to claim 1 is characterized in that,
Have first housing of accommodating above-mentioned wavelength restriction filter and accommodate above-mentioned sensitive device and second housing of above-mentioned first lens,
Rotate through the one of said first shell and above-mentioned second housing and to realize that above-mentioned wavelength restriction filter is around the rotation of the optical axis of above-mentioned first lens.
4. uni-core bidirectional optical communications module according to claim 2 is characterized in that having:
First linking part links an optical fiber;
Second lens make the light that penetrates from above-mentioned optical fiber become directional light;
Wave-division multiplexer filter reflects above-mentioned directional light to above-mentioned wavelength restriction filter; And
The 3rd housing is accommodated above-mentioned second lens and above-mentioned wave-division multiplexer filter,
Be provided with in interior all sides of the outer wall of said first shell and first of above-mentioned wavelength restriction filter be set face is set; Outer circumferential side at the outer wall of said first shell is provided with first installed surface; Above-mentioned first is provided with the angle of face and above-mentioned first installed surface formation afore mentioned rules
Outer circumferential side at the outer wall of above-mentioned the 3rd housing is provided with second installed surface, and above-mentioned second installed surface is and the plane of the light shaft positive cross of above-mentioned first lens, makes above-mentioned first installed surface and above-mentioned second installed surface carry out the rotation of said first shell abreast.
5. uni-core bidirectional optical communications module according to claim 3 is characterized in that having:
First linking part links an optical fiber;
Second lens make the light that penetrates from above-mentioned optical fiber become directional light;
Wave-division multiplexer filter reflects above-mentioned directional light to above-mentioned wavelength restriction filter; And
The 3rd housing is accommodated above-mentioned second lens and above-mentioned wave-division multiplexer filter,
Be provided with in interior all sides of the outer wall of said first shell and first of above-mentioned wavelength restriction filter be set face is set; Outer circumferential side at the outer wall of said first shell is provided with first installed surface; Above-mentioned first is provided with the angle of face and above-mentioned first installed surface formation afore mentioned rules
Outer circumferential side at the outer wall of above-mentioned the 3rd housing is provided with second installed surface, and above-mentioned second installed surface is and the plane of the light shaft positive cross of above-mentioned first lens, makes above-mentioned first installed surface and above-mentioned second installed surface carry out the rotation of said first shell abreast.
6. according to claim 4 or 5 described uni-core bidirectional optical communications modules, it is characterized in that,
A plurality of above-mentioned optical modules that receive are coupled through above-mentioned wave-division multiplexer filter and above-mentioned second lens and above-mentioned fiber optics respectively, and a plurality of above-mentioned optical modules that receive are installed on above-mentioned the 3rd housing.
7. the manufacturing approach of a uni-core bidirectional optical communications module, above-mentioned uni-core bidirectional optical communications module has: the 3rd housing, accommodating the light that makes from an optical fiber becomes second lens of directional light and the wave-division multiplexer filter of the above-mentioned directional light of reflection; With first housing, to accommodate according to wavelength and limit incident light wavelength restriction filter, the manufacturing approach of above-mentioned uni-core bidirectional optical communications module is characterised in that, comprises following operation:
Above-mentioned second lens and above-mentioned wave-division multiplexer filter are fixed on interior all sides of the outer wall of above-mentioned the 3rd housing;
Measurement is in the formed angle of working direction of the above-mentioned directional light that normal and above-mentioned wave-division multiplexer filter reflected of the second set installed surface of the outer circumferential side of the outer wall of above-mentioned the 3rd housing;
The following said first shell of preparing; Outer circumferential side at the outer wall of said first shell is provided with first installed surface; Be provided with first in interior all sides of this outer wall face be set, above-mentioned first installed surface and above-mentioned first angle and the measured above-mentioned angle of the formed regulation of face is set or the difference of angle that measured above-mentioned angle is obtained with proofreading and correct the angle addition little; And
Make above-mentioned first installed surface and above-mentioned second installed surface make the said first shell rotation in parallel; Angle with the output that obtains expecting for the above-mentioned directional light that incides above-mentioned wavelength restriction filter is fixed on said first shell on above-mentioned the 3rd housing.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
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| JP018576/2011 | 2011-01-31 | ||
| JP2011018576A JP2012159640A (en) | 2011-01-31 | 2011-01-31 | Single core bidirectional optical communication module and manufacturing method thereof |
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| CN102621643A true CN102621643A (en) | 2012-08-01 |
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| CN102854583A (en) * | 2012-09-29 | 2013-01-02 | 索尔思光电（成都）有限公司 | Single-fiber two-way light transceiver |
| CN102854584A (en) * | 2012-10-09 | 2013-01-02 | 索尔思光电（成都）有限公司 | Single-fiber two-way optical transceiver |
| CN106353861A (en) * | 2016-10-31 | 2017-01-25 | 成都优博创通信技术股份有限公司 | Intensive wavelength division multiplexing optical transceiver assembly based on PON system |
| CN114002777A (en) * | 2021-11-15 | 2022-02-01 | 中山大学 | Multi-core multi-mode optical fiber multiplexer |
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| KR101285766B1 (en) * | 2012-05-18 | 2013-07-19 | 에스케이텔레콤 주식회사 | Bidirectional optical transmitting/receiving module |
| CN102843197B (en) * | 2012-09-29 | 2015-05-06 | 索尔思光电（成都）有限公司 | Duplexing light transceiving device body |
| KR101473651B1 (en) * | 2013-01-08 | 2014-12-17 | 주식회사 옵토웰 | Coarse wavelength division multiplexing optical subassembly moudle and manufacturing method therof |
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| KR101660958B1 (en) * | 2014-06-13 | 2016-09-29 | 주식회사 오이솔루션 | Bi-directional optical module |
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| JP2012159640A (en) | 2012-08-23 |
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Application publication date: 20120801 |