CN105068182A - Polarized light transmission device with high polarization maintaining performance - Google Patents

Polarized light transmission device with high polarization maintaining performance Download PDF

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Publication number
CN105068182A
CN105068182A CN201510479258.9A CN201510479258A CN105068182A CN 105068182 A CN105068182 A CN 105068182A CN 201510479258 A CN201510479258 A CN 201510479258A CN 105068182 A CN105068182 A CN 105068182A
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CN
China
Prior art keywords
fiber
optical
leading
polarized light
light transmission
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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.)
Pending
Application number
CN201510479258.9A
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Chinese (zh)
Inventor
何在新
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Vlink Optics Corp
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Vlink Optics Corp
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Filing date
Publication date
Application filed by Vlink Optics Corp filed Critical Vlink Optics Corp
Priority to CN201510479258.9A priority Critical patent/CN105068182A/en
Publication of CN105068182A publication Critical patent/CN105068182A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B6/00Light guides
    • G02B6/04Light guides formed by bundles of fibres
    • G02B6/06Light guides formed by bundles of fibres the relative position of the fibres being the same at both ends, e.g. for transporting images
    • G02B6/08Light guides formed by bundles of fibres the relative position of the fibres being the same at both ends, e.g. for transporting images with fibre bundle in form of plate

Abstract

The invention provides a polarized light transmission device with high polarization maintaining performance. The polarized light transmission device comprises basic components, a cover plate and an optical fiber array, is provided with a front end part for optical communication connection, and is characterized in that: the front end part is provided with a positioning structure of an optical fiber array, a plurality of parallel optical fiber positioning grooves for positioning optical fibers in the optical fiber array one by one are formed in the positioning structure in the front end part, the optical fibers are fixed at the optical fiber positioning grooves by using a first adhesive so as to satisfy optical fiber fixing requirements of the front end part in surface optical grinding, and a main body part behind the front end part is a public part of all optical fibers in the optical fiber array, the public part is filled with a second adhesive for fixing the optical fibers, and the hardness of the first adhesive is greater than that of the second adhesive. The polarized light transmission device ensures the optical input/output characteristics of the optical fiber end surface, effectively enhances the extinction ratio of polarization maintaining optical fibers, and guaranteeing the high polarization-maintaining degree transmission quality feature of the polarization maintaining optical fibers.

Description

A kind of polarized light transmission apparatus of high guarantor's bias
Technical field
The present invention relates to a kind of new design of polarization maintaining optical fibre array, especially a kind of polarized light transmitting device of high guarantor's bias, belongs to the technical field of coherent optical-fiber communication device.
Background technology
For coherent optical communication system, at transmitting terminal, adopt external modulation mode to modulate the signal on light carrier and transmit.When flashlight transmission arrives receiving end, first carry out Coherent coupling with a local oscillator light signal, then detected by balanced reciver.Coherent light communication, according to local oscillator light frequency and flashlight frequency not grade or equal, can be divided into Heterodyne detect and homodyne detection.What the former light signal obtained after opto-electronic conversion is intermediate-freuqncy signal, also needs secondary demodulation just can be converted into baseband signal.The latter's light signal is directly changed into baseband signal after opto-electronic conversion, and without secondary demodulation, but it requires that local oscillator light frequency is strictly mated with flashlight frequency, and requires the PGC demodulation of local oscillator light and flashlight.
In coherent light communication, coherent detection requires that signal beams must have identical polarization direction with local beam, and that is, both electric vector directions must be identical, could obtain the high sensitivity that coherent reception can provide.Otherwise, coherent detection sensitivity can be made to decline.Because in this case, only have the projection of signal light-wave electric vector on local oscillator light-wave electric direction vector, just real have contribution to the IF signal current that mixing produces.If mismatched angles is more than 60 °, then the sensitivity of receiver almost can not get any improvement, thus loses the superiority of coherent reception.Therefore, in order to give full play to the superiority of coherent reception, the measure of light wave polarization-stable should be taked in coherent light communication.Mainly contain two kinds of methods: one is adopt " polarization maintaining optical fibre " to make light wave in transmitting procedure, keep the polarization state of light wave constant.And common single-mode fiber can make the polarization state of light wave change due to factors such as the mechanical vibration of optical fiber or temperature variation." polarization maintaining optical fibre " has at fiber end face guarantor deflection polarity compared with single-mode fiber, and it is not symmetrical structure, so to external stress sensitive.But as shown in Figure 5,6, traditional optical signal transmission device positions optical fiber with long V groove on its substrate, with same bonding agent fixed fiber in length range, stress is large, destroys the polarization property of " polarization maintaining optical fibre ".Two is use common single-mode fiber, polarization diversity technology is adopted at receiving end, first flashlight is divided into two-way as balance reception after mixing with local oscillator light, to often-the two paths of signals that road signal adopts again polarizing beam splitter mirror to be divided into cross polarization detects respectively, then a square summation is carried out, finally two-way balance reception signal is adjudicated, selects preferably-road is as output signal.Output signal now has nothing to do with the polarization state of Received signal strength, thus eliminates the random variation of signal polarization state in transmitting procedure.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of polarized light transmission apparatus with high guarantor's bias.For this reason, the present invention is by the following technical solutions:
A kind of polarized light transmission apparatus of high guarantor's bias, comprise basic components, cover plate, fiber array, described polarized light transmission apparatus has the leading section connected for optical communication, it is characterized in that, the location structure of fiber array is set in described leading section, described fiber orientation structure is provided with the fiber orientation groove multiple arranged side by side of the optical fiber in positioning optical waveguides array one by one in described leading section, and at fiber orientation groove place the first bonding agent fixed fiber, needs are fixed for optical fiber when meeting leading section surface optics grinding, main part after leading section is the public part of all optical fiber of fiber array, fill at public part the second bonding agent to fix these optical fiber, and the hardness of the first bonding agent is greater than the hardness of the second bonding agent.
On the basis adopting technique scheme, the present invention also can adopt following further technical scheme:
Described basic components arrange fiber orientation groove in described leading section, do not have fiber orientation groove in the part of the described public part of correspondence.
The position of the corresponding described public part of described cover plate be female parts on cover plate.
Described basic components also have rear support portion, described rear support portion is provided with the fiber orientation groove corresponding with the fiber orientation groove of front end, make to collimate during the fiber orientation groove of same optical fiber by the fiber orientation groove of leading section and rear support portion, described cover plate support is in the fiber orientation groove cell wall top of described basic components in leading section and rear support portion, and the part of described basic components between described leading section and rear support portion is the part of corresponding described public part.
The position of described cover plate between corresponding leading section and rear support portion is the female parts of corresponding described public part.
At fiber orientation groove place the 3rd bonding agent fixed fiber in rear support portion, the hardness that the hardness of the 3rd bonding agent is more than or equal to the second bonding agent is less than the hardness of the first bonding agent.
Owing to adopting technical scheme of the present invention, basic components are divided into two parts by the present invention, and Part I is for locating, and another part is the part ensureing optical fibre polarization-maintaining degree.As long as the fiber orientation groove of Part I meets optical grinding needs, Part II is public to fibre luminous in fiber array, and fill fixing with the bonding agent lower than the bonding agent hardness of Part I, Stress Profile for Polarization-Maintaining can be greatly reduced, both ensure that the optics I/O characteristic of fiber end face, effectively improve again the extinction ratio of polarization maintaining optical fibre.Ensure that the height of polarization maintaining optical fibre protects degree of bias transmission quality characteristic.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of embodiment provided by the present invention.
Fig. 2 is the longitudinal sectional view of embodiment described in Fig. 1.
Fig. 3 is the transverse sectional view at the public domain place at basic components embodiment illustrated in fig. 1.
Longitudinal sectional block diagram that Fig. 4 is embodiment described in Fig. 1.
Fig. 5 is the stereographic map of traditional optical signal transmission device.
Fig. 6 is the longitudinal sectional view of traditional optical signal transmission device.
Embodiment
With reference to accompanying drawing.Height provided by the present invention protects the polarized light transmission apparatus of bias, and comprise basic components 1, cover plate 2, fiber array, the optical fiber 3 in described fiber array adopts polarization maintaining optical fibre.
Described polarized light transmission apparatus has the leading section connected for optical communication, the location structure of fiber array is set in described leading section, described fiber orientation structure is provided with the fiber orientation groove multiple arranged side by side of the optical fiber in positioning optical waveguides array one by one in described leading section, fiber orientation groove can be V-type groove or U-type groove, namely on the cover board fiber orientation groove is not formed yet, and be only formed in the leading section of described basic components 1, represent with drawing reference numeral 11.Fiber orientation groove can be double V-shaped groove or double-U-shaped groove Position Design, and also namely not only the leading section of described basic components 1 has V-type groove or U-type groove, and the leading section of cover plate also has V-type groove or U-type groove, thus is combined as double V-shaped or double-U-shaped fiber orientation groove up and down.
At fiber orientation groove 11 place first bonding agent 4 fixed fiber of leading section, fiber orientation groove 11 the best of described leading section is more short better, when only need carry out optical grinding in leading section, optical fiber is fixed, main part after leading section is the public part 100 of all optical fiber of fiber array, fill to fix these optical fiber at public part 100 second bonding agent 5, and the hardness of the first bonding agent is greater than the hardness of the second bonding agent, transmission apparatus is made only to form region of high stress A and be low stress area B in public part 100 or the other parts except fore-end at fore-end, the stress of optical fiber suffered by the B of low stress area is less than the stress suffered by the region of high stress.
Described basic components 1 arrange fiber orientation groove 11 in described leading section and do not have fiber orientation groove in the part 12 of the described public part 100 of correspondence.
Described basic components also have rear support portion 13, described rear support portion 13 is provided with the fiber orientation groove 14 corresponding with the fiber orientation groove 11 of front end, collimation when making the fiber orientation groove 14 of same optical fiber by the fiber orientation groove 11 of leading section and rear support portion, fiber orientation groove 14 can be V-type groove or U-type groove.
Described cover plate 2 is supported in the cell wall top of described basic components 1 at the fiber orientation groove 11,14 in leading section and rear support portion, and the part of described basic components between described leading section and rear support portion is the part 12 of corresponding described public part.The position of described cover plate 2 between corresponding leading section and rear support portion is the female parts 21 of corresponding described public part.Described cover plate 2 also can arrange V-type groove or U-type groove at place of corresponding rear support portion, and the fiber orientation groove formed in place, rear support portion so is also double V-shaped or double-U-shaped fiber orientation groove.
At fiber orientation groove place the 3rd bonding agent 6 fixed fiber in rear support portion, the hardness that the hardness of the 3rd bonding agent 6 is more than or equal to the second bonding agent 5 is less than the hardness of the first bonding agent 4, fixed length effect can be played, have buffer action again, the polarization property of polarization maintaining optical fibre can not be destroyed simultaneously.
Drawing reference numeral 7 is protecting glue, also can adopt the bonding agent identical with the second bonding agent 5 or the 3rd bonding agent 6.
The present invention is forward position, coherent communications field high-tech Primary Component as polarized light input terminal, it is the micro-optical device at present with polarization function in high speed device, the key Design of this product ensures that device has high performance of protecting the degree of bias, solves the High Extinction Ratio technical barrier that the guarantor in coherent communication inputs partially.Substantially increase interference signal detection sensitivity.
The foregoing is only specific embodiments of the invention, but architectural feature of the present invention is not limited thereto, any those skilled in the art is in the field of the invention, and the change done or modification are all encompassed among protection scope of the present invention.

Claims (6)

1. the polarized light transmission apparatus of one kind high guarantor's bias, comprise basic components, cover plate, fiber array, described polarized light transmission apparatus has the leading section connected for optical communication, it is characterized in that, the location structure of fiber array is set in described leading section, described fiber orientation structure is provided with the fiber orientation groove multiple arranged side by side of the optical fiber in positioning optical waveguides array one by one in described leading section, and at fiber orientation groove place the first bonding agent fixed fiber, needs are fixed for optical fiber when meeting leading section surface optics grinding, main part after leading section is the public part of all optical fiber of fiber array, fill at public part the second bonding agent to fix these optical fiber, and the hardness of the first bonding agent is greater than the hardness of the second bonding agent.
2. the polarized light transmission apparatus of a kind of high guarantor's bias as claimed in claim 1, is characterized in that described basic components arrange fiber orientation groove in described leading section, does not have fiber orientation groove in the part of the described public part of correspondence.
3. the polarized light transmission apparatus of a kind of high guarantor's bias as claimed in claim 1, is characterized in that the position of the corresponding described public part of described cover plate is the female parts on cover plate.
4. as claim 1, the polarized light transmission apparatus of a kind of high guarantor's bias described in 2 or 3, it is characterized in that described basic components also have rear support portion, described rear support portion is provided with the fiber orientation groove corresponding with the fiber orientation groove of front end, make to collimate during the fiber orientation groove of same optical fiber by the fiber orientation groove of leading section and rear support portion, described cover plate support is in the fiber orientation groove cell wall top of described basic components in leading section and rear support portion, the part of described basic components between described leading section and rear support portion is the part of corresponding described public part.
5. the polarized light transmission apparatus of a kind of high guarantor's bias as claimed in claim 4, is characterized in that the position of described cover plate between corresponding leading section and rear support portion is the female parts of corresponding described public part.
6. the polarized light transmission apparatus of a kind of high guarantor's bias as claimed in claim 5, it is characterized in that fiber orientation groove place the 3rd bonding agent fixed fiber in rear support portion, the hardness that the hardness of the 3rd bonding agent is more than or equal to the second bonding agent is less than the hardness of the first bonding agent.
CN201510479258.9A 2015-08-03 2015-08-03 Polarized light transmission device with high polarization maintaining performance Pending CN105068182A (en)

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Application Number Priority Date Filing Date Title
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Publications (1)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020003933A1 (en) * 2000-03-16 2002-01-10 Sherrer David W. Fiber array with wick-stop trench for improved fiber positioning
CN101398513A (en) * 2007-09-26 2009-04-01 博创科技股份有限公司 Optical fiber array device of cramped construction and method for manufacturing same
CN203786322U (en) * 2014-04-11 2014-08-20 冯岳忠 Optical fiber array used for polarization maintaining optical fiber
CN204832573U (en) * 2015-08-03 2015-12-02 深圳加华微捷科技有限公司 High polarization optical transmission apparatus who protects bias

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020003933A1 (en) * 2000-03-16 2002-01-10 Sherrer David W. Fiber array with wick-stop trench for improved fiber positioning
CN101398513A (en) * 2007-09-26 2009-04-01 博创科技股份有限公司 Optical fiber array device of cramped construction and method for manufacturing same
CN203786322U (en) * 2014-04-11 2014-08-20 冯岳忠 Optical fiber array used for polarization maintaining optical fiber
CN204832573U (en) * 2015-08-03 2015-12-02 深圳加华微捷科技有限公司 High polarization optical transmission apparatus who protects bias

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Application publication date: 20151118