CN201966920U - Laser launch module for fiber-optical communication - Google Patents
Laser launch module for fiber-optical communication Download PDFInfo
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- CN201966920U CN201966920U CN2011200850633U CN201120085063U CN201966920U CN 201966920 U CN201966920 U CN 201966920U CN 2011200850633 U CN2011200850633 U CN 2011200850633U CN 201120085063 U CN201120085063 U CN 201120085063U CN 201966920 U CN201966920 U CN 201966920U
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- fiber
- lock pin
- laser
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Abstract
The utility model discloses a laser launch module for fiber-optical communication, which belongs to the fiber-optical communication technical field. The laser launch module comprises a laser transmitter used for transmitting laser beam, a first adapter, a second adapter, a third adapter, a multi-module pushing core, a ceramic bushing and a fiber-optical connector, wherein the left end of the first adapter is connected with the laser transmitter in a matching way; the left end surface of the second adapter is matched with the right end surface of the first adapter; the second adapter is provided with a multi-module pushing core hole, a first step cavity and a second step cavity; the left end of the fiber-optical connector is inserted in the ceramic bushing in a matching way, the right end of the fiber-optical connector stretches out of the third adapter; for the third adapter, the left end is inserted in the second step cavity in a matching way, the right end stretches out of the second adapter; for the ceramic bushing, the left end is inserted in the first step cavity in a matching way, the right end is inserted in the third adapter in a matching way; and for the multi-module pushing core, the left end is inserted and arranged in the multi-module pushing core hole, the right end is inserted in the ceramic bushing in a matching way. The utility model has the advantages that: the optical connection between the central hole of the multi-module pushing core and the 9 Mum fiber core of the external jumper wire can be guaranteed, the optical coupling efficiency can be improved, and the requirement on the Wiggle performance test can be met.
Description
Technical field
The utility model belongs to technical field of optical fiber communication, be specifically related to the laser emitting module that a kind of optical fiber communication is used, this laser emitting module can reduce the optical power change that caused by the external carbuncle effect owing to the light coupling assembling in actual environment for use, thereby can detect by the Wiggle index of IEC draft standard regulation
Background technology
The laser emitting module that known optical communication is used comprises generating laser, adapter, single mode lock pin, porcelain bushing and fiber connector.Generating laser matches with adapter, and single mode lock pin and fiber connector coaxial accommodate are in porcelain bushing, and porcelain bushing is contained in the adapter.Generating laser emitted laser bundle focuses on by optical microlens on the single mode lock pin of 9 μ m, is that the optical fiber of 9 μ m is connected output by fiber connector and as outer wire jumper and core diameter again.
The laser emitting module that optical fiber communication is used can be seen in disclosed Chinese patent literature, as the direct integrated light emission module of CN2411626Y(), CN256783Y(semiconductor laser transmitter module and for example), also as publication number CN101178447A(transmitter module and Optical Receivers), the parallel light emission module and the manufacture method of publication number CN1530681A(vertical cavity surface generating laser array for another example, or the like).
How above-mentioned patent documentation makes laser emitting module make optical power change be no more than the technology enlightenment of 1.5db under the condition of applied stress if all not providing.Yet, International Electrotechnical Commission (IEC) formulates the testing standard draft (full name: IEC-Wiggle Standard Draft SubimittedVer), standard criterion be connected between the optical fiber because the method for testing of the optical power change that stress produces by fiber connector from optical transmitting set.This method adopts stepping motor to drive laser emitting module rotation, and 0.1,0.25 and 0.5 pound of load-carrying on external optical fiber, surveys a point, the variable power mean value≤1.5db of each point for per 2.5 °.Industry claims this test to be the Wiggle Characteristics Detection, and this Characteristics Detection is the harsh detection method of the open-air various environments for use of simulation.
But, the laser emitting module that optical fiber communication that the applicant mentions in the above that known is is used often is difficult to by aforementioned Wiggle Characteristics Detection (also claiming index to detect), thereby restricted China's laser emitting module to the high-end product development and to the expansion of overseas market.
The applicant thinks, be difficult to mainly contain following two aspects by the reason of Wiggle Characteristics Detection: the one, the coupling efficiency problem, according to mode coupling theory, be coupled to the numerical aperture that luminous energy in the optical fiber depends on optical fiber, optical fiber only can receive those light in the light cone that is limited by the numerical aperture of optical fiber and core diameter.Wherein, the numerical aperture of light source and optical fiber, the size of light source and these parameters of core diameter have determined coupling efficiency, and the amassing of the size of light source and the numerical aperture of light source is a constant.Because the emission field pattern of semiconductor laser is not circular but oval, though the emitted laser line focus, but for the single mode lock pin of 9 μ m still as big light source, its beam diameter is greater than the numerical aperture of optical fiber.According to the aperture diffraction theory, the light beam that enters into optical fiber is the part of basic mode energy, still has portion of energy not to be injected in the optical fiber.The 2nd, structure problem, the generating laser emitted laser through the single mode lock pin of 9 μ m after again through fiber connector with as outside 9 μ m optical fiber of wire jumper be connected, must on mechanical structure, guarantee the axiality of single mode lock pin and fiber connector, coaxial to guarantee light beam with the light between the optical fiber, yet because the size and Orientation of the applied stress in the actual environment for use changes, it is coaxial that aforesaid single mode lock pin and fiber connector objectively are difficult to guarantee, thereby can't guarantee that light is coaxial.
Structural factor (producing angle and transversion malposition between two fibre cores because the external force effect makes) can produce substantial influence to coupling efficiency as shown in the above description, that is to say, the latter in aforementioned two aspects influences in the former, therefore the light export structure that very is necessary laser emitting module that the optical fiber communication in the prior art is used is improved, for this reason, the applicant has done useful exploration, and technical scheme described below produces under this background
Summary of the invention
Task of the present utility model is to provide a kind of axiality that helps to solve by laser beam between generating laser and light coupling assembling, the laser emitting module of avoiding the optical fiber communication of the luminous power fluctuations that angle and transversion malposition cause between 360 ° scope internal cause two fibre cores to use.
Task of the present utility model is finished like this, the laser emitting module that a kind of optical fiber communication is used, comprise the generating laser that is used to launch laser beam, first, second, the 3rd adapter, the multimode lock pin, porcelain bushing and fiber connector, the left end and the generating laser of first adapter connect, and generating laser probes in the cavity volume of first adapter, the left end end face of second adapter matches with the right-hand member end face of first adapter, this second adapter has multimode lock pin hole, first step chamber and second step chamber, the left end of fiber connector and porcelain bushing inserting, right-hand member leans out the 3rd adapter, the left end of the 3rd adapter and the chamber inserting of described second step, right-hand member leans out second adapter, the left end of porcelain bushing and the inserting of first step chamber, right-hand member and the 3rd adapter inserting, the left end of multimode lock pin is inserted in the multimode lock pin hole, right-hand member and porcelain bushing inserting, wherein: described multimode lock pin is coaxial with described fiber connector, and the right-hand member end face of multimode lock pin matches with the left end end face of fiber connector, and it is the medium pore of multimode lock pin is coaxial with described generating laser emission laser beam, and coaxial with the fiber optic hub of fiber connector.
The fibre core aperture of medium pore described in the utility model is 50 μ m, 62.5 μ m or 100 μ m.
The technical scheme that the utility model provides can ensure that the medium pore of multimode lock pin is connected with the light that 9 μ m fibre cores of outer wire jumper are remained valid, avoid scope internal cause light coupling assembling to cause the situation of optical power change under the stress outside greater than 1.5db at 360 °, improve coupling efficiency, satisfy Wiggle characteristic test requirement.
Description of drawings
Fig. 1 is an assembling assumption diagram of the present utility model.
Fig. 2 is the cutaway view of Fig. 1.
Embodiment
Ask for an interview Fig. 1 and Fig. 2, the laser emitting module that the optical fiber communication that the utility model provides is used can be applicable to TOSA, the BOSA of single fiber bi-directional and three-dimensional and single mode use all light signals outputs with the promptness optical communication field.Comprise generating laser 1, first, second, third adapter 2,3,4, multimode lock pin 5, porcelain bushing 6 and fiber connector 7, promptly on the inwall of an end of generating laser 1, constitute several at the left end of the cavity volume 21 of first adapter 2 and connect step chamber 211, connect connecting step 11 tight fits and first adapter 2 is connected with generating laser 1 on step chamber 211 and the generating laser 1 by this.The right-hand member end face of the left end end face of second adapter 3 and first adapter 2 is matched, and docked mode is preferably used laser welding, but does not repel otherwise that second adapter 3 and first adapter 2 is fixing.Second adapter 3 has a multimode lock pin hole 31, a first step chamber 32 and a second step chamber 33, and multimode lock pin hole 31, first step chamber 32 and second step chamber 33 form each other by little and big gradient relation.The axial central authorities of fiber connector 7 have a fiber optic hub 71, to be inserted in the fiber optic hub 71 by the optical fiber 9 of wire jumper outside the conduct of Fig. 2 signal in use, the right-hand member inserting of the tube chamber of the left end of this fiber connector 7 and porcelain bushing 6, and the right side end of fiber connector 7 is stuck in porcelain bushing 6, and is stuck in the 3rd adapter 4.The left end of the 3rd adapter 4 is inserted in the aforesaid second step chamber 33, and right-hand member leans out second adapter 3.The left end of porcelain bushing 6 and 32 insertings of aforesaid first step chamber, and the right-hand member of porcelain bushing 6 and 4 insertings of the 3rd adapter.The left end of multimode lock pin 5 is inserted in the aforesaid multimode lock pin hole 31, and right-hand member and porcelain bushing 6 insertings.The aperture of the medium pore 51 of multimode lock pin 5 is 50 μ m, 62.5 μ m or bigger for example 100 μ m even bigger.The right-hand member end face of multimode lock pin 5 and the left end end face of fiber connector 7 fit, both form coaxial relation, and, the fiber optic hub 71 of fiber connector 7 and the medium pore of multimode lock pin 5 51 keeps coaxial, the medium pore 51 of multimode lock pin 5 with show by aforesaid generating laser 1 emission laser beam 8(Fig. 2) coaxial.
The installation of above-mentioned parts belongs to the precision optical machinery assembling, debugging is by means of anchor clamps, and under powering state, adjust between X, Y and the Z three, when received signal is maximum, adopt adhesive to fix and dry, aforesaid first adapter 2 and generating laser 1 are adjusted on two dimensional surface powering up under (energising) state too, when making the signal that receives maximum, just adopt laser welding to fix.
The left side that the applicant mentions in an embodiment and right notion all are according at present by the location status of Fig. 1 and Fig. 2 signal in order to help to understand, therefore not binding to the utility model scheme, promptly can not and think that the utility model of taking off category is arranged with the direction change.
Theoretical foundation mode coupling theory design of the present utility model, and a plurality of pattern detection of process have proved the correctness of design.
In view of the multimode fiber of 62.5/125 μ m at first is adopted as how tame industry standard by the U.S., because the above multimode fiber core diameter of 50 μ m is big, the numerical aperture height can be coupled into more promptly bigger luminous power from laser emitting source.Again in view of being coupled to the numerical aperture that luminous energy in the optical fiber depends on optical fiber, optical fiber only can receive those light in the light cone that is limited by the numerical aperture of optical fiber and core diameter.Also adopt refraction index profile control in view of internationally famous Corning Incorporated, releases have only the characteristic that monomode fiber just can provide before this and also can in network, use before to the supporting low-cost system of multimode fiber.
Based on above three factors, the applicant designs the multimode lock pin 5 that has adopted 50 μ m, 62.5 μ m or 100 μ m, make its end face near or greater than the spot diameter of footpath lens focus to its end face.And because curtailment 4 ㎜ of multimode lock pin 5, according to mode coupling theory, coupling ratio can be ignored, and depends primarily on signal wavelength.Therefore the utility model scheme can ensure that the light energy (power) that enters in the multimode lock pin 5 increases.Again, because the medium pore 51(of multimode lock pin 5 is actual is the above fibre cores of multimode 50 μ m, now abbreviate medium pore 51 as) to increase be 50 μ m, 62.5 μ m or more than the 100 μ m, compare, spot diameter at (and on the contact jaw between the optical fiber 9) on the right side of multimode lock pin 5 increases, although optical fiber 9 exists by the factor that patches the variation that connected mode or applied stress cause, but the core diameter that all can guarantee the optical fiber 9 of 9 μ m is in the spot diameter on the end face of coupling multimode lock pin 5, even if optical fiber 9 uses the core diameter of 50 μ m, the luminous power that cause is injected in the multimode lock pin 5 is big, so the variable power scope can be ignored.Thereby the technical scheme that the utility model is provided is satisfied aforesaid Wiggle characteristic test requirement
Claims (2)
1. laser emitting module that optical fiber communication is used, it is characterized in that comprising the generating laser (1) that is used to launch laser beam, first, second, the 3rd adapter (2,3,4), multimode lock pin (5), porcelain bushing (6) and fiber connector (7), the left end of first adapter (2) and generating laser (1) connect, and generating laser (1) probes in the cavity volume (21) of first adapter (2), the left end end face of second adapter (3) matches with the right-hand member end face of first adapter (2), this second adapter (3) has multimode lock pin hole (31), first step chamber (32) and second step chamber (33), the left end of fiber connector (7) and porcelain bushing (6) inserting, right-hand member leans out the 3rd adapter (4), the left end of the 3rd adapter (4) and described second step chamber (33) inserting, right-hand member leans out second adapter (3), the left end of porcelain bushing (6) and first step chamber (32) inserting, right-hand member and the 3rd adapter (4) inserting, the left end of multimode lock pin (5) is inserted in the multimode lock pin hole (31), right-hand member and porcelain bushing (6) inserting, wherein: described multimode lock pin (5) is coaxial with described fiber connector (7), and the right-hand member end face of multimode lock pin (5) matches with the left end end face of fiber connector (7), and it is the medium pore (51) of multimode lock pin (5) is coaxial with described generating laser (1) emission laser beam, and coaxial with the fiber optic hub (71) of fiber connector (7).
2. the laser emitting module that optical fiber communication according to claim 1 is used, the fibre core aperture that it is characterized in that described medium pore (51) are 50 μ m, 62.5 μ m or 100 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200850633U CN201966920U (en) | 2011-03-28 | 2011-03-28 | Laser launch module for fiber-optical communication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200850633U CN201966920U (en) | 2011-03-28 | 2011-03-28 | Laser launch module for fiber-optical communication |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201966920U true CN201966920U (en) | 2011-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200850633U Expired - Fee Related CN201966920U (en) | 2011-03-28 | 2011-03-28 | Laser launch module for fiber-optical communication |
Country Status (1)
| Country | Link |
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| CN (1) | CN201966920U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102111216A (en) * | 2011-03-28 | 2011-06-29 | 常熟市宝源光电科技有限公司 | Laser transmission module for fibre-optical communication |
-
2011
- 2011-03-28 CN CN2011200850633U patent/CN201966920U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102111216A (en) * | 2011-03-28 | 2011-06-29 | 常熟市宝源光电科技有限公司 | Laser transmission module for fibre-optical communication |
| CN102111216B (en) * | 2011-03-28 | 2012-11-21 | 常熟市宝源光电科技有限公司 | Laser transmission module for fibre-optical communication |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110907 Termination date: 20140328 |