CN1261158A - Coupling device of laser diode and optical fiber - Google Patents
Coupling device of laser diode and optical fiber Download PDFInfo
- Publication number
- CN1261158A CN1261158A CN99116935A CN99116935A CN1261158A CN 1261158 A CN1261158 A CN 1261158A CN 99116935 A CN99116935 A CN 99116935A CN 99116935 A CN99116935 A CN 99116935A CN 1261158 A CN1261158 A CN 1261158A
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- Prior art keywords
- optical fiber
- shell
- heat sink
- coupling
- copper billet
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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.)
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 95
- 230000008878 coupling Effects 0.000 title claims abstract description 68
- 238000010168 coupling process Methods 0.000 title claims abstract description 68
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 68
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 41
- 229910052802 copper Inorganic materials 0.000 claims abstract description 41
- 239000010949 copper Substances 0.000 claims abstract description 41
- 230000005855 radiation Effects 0.000 claims abstract description 10
- 239000004065 semiconductor Substances 0.000 claims abstract description 10
- 239000000835 fiber Substances 0.000 claims description 17
- 239000002184 metal Substances 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000000565 sealant Substances 0.000 claims description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 230000017525 heat dissipation Effects 0.000 abstract 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 238000005057 refrigeration Methods 0.000 description 7
- 230000003287 optical effect Effects 0.000 description 6
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 5
- 239000003822 epoxy resin Substances 0.000 description 4
- 239000003292 glue Substances 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 229920000647 polyepoxide Polymers 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010891 electric arc Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 229910000833 kovar Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000001465 metallisation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229920006335 epoxy glue Polymers 0.000 description 1
- 229920002313 fluoropolymer Polymers 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 229920001206 natural gum Polymers 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 210000005239 tubule Anatomy 0.000 description 1
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- Optical Couplings Of Light Guides (AREA)
Abstract
A coupling device of laser diode and optical fiber comprises a tube shell with a tube shell seat, a semiconductor refrigerator in the tube shell, and a heat sink copper block and a heat radiation copper block which are connected into a whole. The heat sink copper block is provided with a coupling fixing head fixed by a fixing clip, and the coupling fixing head fixes an optical fiber coupling head with a hemispherical micro lens at the front end on the heat sink copper block. The heat sink copper block is also provided with a thermistor. The photoelectric detector is arranged on the heat dissipation copper block. The outer of the extending tube shell is provided with a connector with a tail end provided with a connector core and a plurality of lead electrodes. The invention has compact and reasonable structure, small size, portability, temperature control and light control functions, and the output coupling rate is as high as 80-90%.
Description
The invention relates to the coupled apparatus of high power CW (1～6 watt) semiconductor laser and optical fiber, be specially adapted to the efficient coupling of high-power laser diode and special optical fiber, it is a kind ofly to have efficient coupling and contain semiconductor microactuator refrigeration, temperature sensing temperature controlling function and to the laser diode of laser diode light monitoring function and the coupled apparatus of optical fiber.
Watt level high-power semiconductor laser (or claim laser diode, abbreviate LD as) is paid attention in many Military Application such as medical treatment and space laser communication, laser fuze, infrared illumination, search tracking deeply.For it can be used, people are seeking a kind ofly have little refrigeration, temperature sensing temperature controlling function and to the small and light compact device of optical fiber coupling of the light monitoring function of laser diode.The manufacturer that this several years U.S. SDL INC are representative competitively releases this device products (prior art [1] U.S. SDL INC ' .96/ ' 97PRODUCT CATALOG, A.2, A.3, A.4, A.5) this device is except costing an arm and a leg, and the tail optical fiber output couple efficiency of product is not high, mostly is 50～60% (prior art [2]) U.S. SDL INC. ' 93-＂ 98PRODUCT CATALOG), and have only 1～2 watt LD coupled apparatus to have little refrigeration temperature control light control functionality.LD coupled apparatus for laser power P 〉=3,4 watt does not possess refrigeration temperature control light control functionality, and the yet difficult coupling of seeking of driving power.So use inconvenience is arranged, do not satisfy application requirements.
Purpose of the present invention is for overcoming existing deficiency in the above-mentioned prior art, provide a kind of coupled apparatus of high power (1～6 watt) LD and special optical fiber that makes all to have built-in semiconductor microactuator refrigeration temperature control light control functionality, and make coupling efficiency bring up to 70～85%, and it is easy to use, satisfy various (comprising military affairs) and use, compact conformation is reasonable.
The coupled apparatus of laser diode of the present invention and optical fiber contains the shell 26 that has stationary housing screw 7 on the shell seat 17.Be equipped with semiconductor cooler 18 on the shell seat 7 in the shell 26, the heat sink copper billet 4 and the heat radiation copper billet 21 that on semiconductor cooler 18, have both to fuse.The groove 27 that moves towards to have on the centrosymmetric position smaller part circle at the upper surface upper edge of heat sink copper billet 4 optical fiber (14).On the heat sink copper billet 4 of groove 27 both sides, vest fixing threaded hole 3 is arranged, on heat sink copper billet, put the circular hole (10) of thermistor in addition.Front end has the lenticular optical fiber coupling head of hemisphere (13) and is fixed on the heat sink copper billet 4 by the coupling fixed head 1 in the groove 27 that places on the heat sink copper billet 4.Be stamped fixedly vest 2 above the coupling fixed head 1.Fixedly vest 2 is vest fixing threaded hole 3 interior the fixing that are threaded onto groove 27 both sides by fixed screw 19.In order to fix better, between the groove 27 on fixing vest 2, coupling fixed head 1 and the heat sink copper billet 4, fill up the packed layer 12 of inserts formation.Place on the heat sink copper billet 4 of heat radiation copper billet 21 1 sides with the center of heat sink 20 laser diode 5 and the central axis OO of optical fiber coupling head 13 and coincide.Place that there is photodetector 6 in the space on the heat radiation copper billet 21 in the shell 26.Just a shell 26 seals, and is filled with dried nitrogen in the shell 26.As shown in Figure 1.
The other end of the optical fiber 14 front end band optical fiber coupling heads 13 at coupling fixed head 1 center in the shell 26 reaches outside the shell 26, and an end of close shell 26 is with copper pipe 16 on optical fiber 14 cylindricals, between optical fiber 14 cylindricals and copper pipe 16 heat-shrink tube 15 is arranged.The connector 9 that band connector core 8 is arranged on the tail end of the optical fiber 14 that reaches shell 26 lateral surfaces.As shown in Figure 1 and Figure 2.
There is being optical fiber 14 to stretch out that (leading flank) has and shell 26 insulation on the other side of shell 26 sides, and many lead-in wire electrodes 11 of mutually insulated.As shown in Figure 1.Stationary housing screw 7 on the shell seat 7 outside shell 26 has four to be used for shell 26 is fixed on heating radiator usually.Shell 26 leading flanks have mutually insulated and with many lead-in wire electrodes 11 of shell 26 insulation, have 1～10 usually, wherein second vacancy is standby.Stretch out shell 26 infrared optical fibers 14 at a end, on copper pipe 16 and optical fiber 14 cylindricals, be with heat-shrink tube 15 in order that buffer protection optical fiber 14 near shell 26.Stretching out shell 26 outer optical fiber 14 tail ends also is optical fiber 14 output terminals, therefore has connector 9, and the connection core print 8 of its connector 9 (also being called for short tail optical fiber) the present invention has multiple coupling connector core 8 by the special design of different core diameters.
Said coupling fixed head 1 is optical fiber 14 on the center.On optical fiber 14 cylindricals, be with thin sleeve pipe 24.On the cylindrical of thin sleeve pipe 24, be with metal sleeve 23.Between the cylindrical and thin sleeve pipe 24 of optical fiber 14, and between thin sleeve pipe 24 cylindricals and metal sleeve 23, fixing seal layer 22 is arranged all.Between fibre core that exposes in the optical fiber coupling head 13 on optical fiber 14 front ends and the thin sleeve pipe 24 sealant layer 25 is arranged.In order to obtain high coupling efficiency, require the refractive index n of sealant layer 25
25Equal or be approximately equal to the refractive index n of optical fiber 14 coverings
14, promptly
Said fixing seal layer 22 between optical fiber 14 cylindricals and thin sleeve pipe 24 and between thin sleeve pipe 24 cylindricals and metal sleeve 23 is made of scolding tin and epoxide-resin glue.
Said fixedly vest 2 is that kovar is made, or other metal materials are made.
Said fixedly vest 2, packed layer 12 is scolding tin and epoxy glue layer between the groove 27 on coupling fixed head 1 and the heat sink copper billet 4.
Said thin sleeve pipe 24 is glass capillaries, or quartzy tubule etc.
Heat radiation copper billet 21 usefulness screws are fixed on the right side of heat sink copper billet 4.Like this, the heat sink copper billet 4 of fixed fiber coupling head 13 and the heat radiation copper billet 21 of fixed L D5 are fused, do not produce any relative displacement.And the surface of emission that optical fiber coupling head 13 is aimed at LD5 by the multidimensional micropositioning stage is aimed at coupling, and promptly the central axis OO of optical fiber coupling head 13 overlaps with the center of LD5 is strict.When obtaining high coupling efficiency, by fixedly filling tin solder (metallization is fixing) and the fixing encapsulation of epoxide-resin glue between vest 2, optical fiber coupling head 13 and the fixing heat sink copper billet 4.The photodetector 6 that is used for the light monitoring places LD exiting surface front upper side, in the upper space of heat radiation copper billet 4, gets the monitor optical electric current in the light leak mode.
Optical fiber coupling head 13 forms integrated hemisphere lenticule at the fibre core head, and its diameter is the best to be slightly larger than (20%～30%) core diameter, and coupling efficiency is the highest.
Coupling fixed head 1 of the present invention, fixing in order to be coupled, coupling fixed head 1 is made structure as shown in Figure 3, almost with unguyed the same during coupling before fixed, promptly the fixed sturcture of optical fiber 14 is not introduced coupling loss for coupling loss minimum, tail optical fiber output light function.
Coupled apparatus of the present invention.When the laser diode emitted light beams, be placed in the hemisphere lenticule that is total to optical fiber coupling head 13 front ends of central axis OO with it and receive.Because the lenticular diameter of hemisphere greater than the diameter of optical fiber 14 fibre cores, so the light beam that lenticule the receives overwhelming majority is exported by optical fiber 14 to tail end, has high coupling efficiency, generalized case is issued to η 〉=70%, and coupling efficiency reaches η under the optimum coupling state
Max〉=85～90%, and tail optical fiber luminous power output is stable fine, Δ p/p＞0.5%.
Coupling of the present invention is fixing to adopt which floor metal (kovar) sleeve pipe of big or small a chain of rings to replace the glass capillary of prior art, and its effect is identical, but is good with structure of the present invention, convenient, simple.Epoxy natural gum glue-line should approach between sleeve pipe, so that make the core centre degree good.
Advantage of the present invention: under high power (1～6 watt) LD optical fiber coupling situation, inside has semiconductor microactuator refrigerator 18 and places the thermistor of 10 li of circular holes on the heat sink copper billet 4 is the temperature sensor temperature control, photodetector monitoring optical power function, compact conformation is reasonable, small portable, easy to operate during coupling.The tail optical fiber end has added connector 9 standard FC of extraordinary core diameter of the present invention again, is convenient to docking of device and application system.This has enlarged the range of application of this coupled apparatus greatly.
Adopt high strength in the device of the present invention, bending resistance is good, for adaptable special optical fiber 14 under the various severe environmental conditions, adopts the 3M Co TECS of the U.S.
TMTECS wherein
TMThe high digital aperture N of optical fiber
A=0.39 ± 0.02 single core silica fibre more can be applicable to the application that requires high output couple efficiency and the output of high tail optical fiber luminous power.In addition, at the ask for something high coupling efficiency and than small value aperture (N
A=0.22 ± 0.02), tail optical fiber is exported in the application with high brightness and is then selected TECS for use
TMThe optical fiber 14 of the quartzy covering of quartzy core, this a kind of optical fiber in back because quartzy covering outside also has one deck TECS high strength fluorinated polymer covering (low-refraction), has just more improved coupling efficiency.
The fibre core head of optical fiber coupling head 13 of the present invention has the hemisphere lenticule of slightly larger in diameter in core diameter, and the manufacture craft of this structure is simple, comprises the fiber stripping core, and corrosion conical head and arc process and fibre core head form integral lens, and original standard can both be arranged.
Success ratio is very high, does according to this configuration, and coupling efficiency generally can both reach 60～70%, even reaches 80～90%.Prior art all only is suitable for the standard quartz cladded-fiber, with optical fiber coupling head structure of the present invention very big-difference is arranged, and manufacture craft is difficult to standard.
The coupling fixed head that the present invention adopts is to the fixedly (see figure 3) of optical fiber coupling head, generally held standard optical fiber is that fibre core and covering all are quartzy, is the refractive index difference, when electric arc burns till integral micro-lens, (～7mm) quartzy covering is by scorification, the effect of intact maintenance covering at lens contiguous position.Therefore, can be when added metal sleeve pipe or glass bushing optical fiber appearance metallization, also can make inserts and not influence the luminous power coupling efficiency and the light transmission of optical fiber 14 with scolding tin with refractive index height such as epoxy resin (n～1.55).And now at the light-emitting area of hundreds of μ m * 1 μ m of several watts of level high power LD, the special optical fiber that must adopt core diameter to be complementary with it.The present invention selects TECS for use
TMSingle silica fibre, when forming integral micro-lens with arc process, head has the long optical fiber TECS covering of 8mm～10mm must shell clearly approximately, not so also can be burnt by electric arc and destroy.Fixing (stable for tail optical fiber output, as must to avoid the fibre core head to rock) of the exposed fibre core that such 8～10mm is long is exactly a difficult problem, the metal packing absorbing light, and scolding tin etc. can not be used.Common cementation glue such as epoxy resin, its refractive index is higher than 1.48, all is higher than fibre core n
14=1.457, the laser of LD just can't be coupled in the optical fiber 14 and go like this.As shown in Figure 3, only find the viscose glue of a kind of refractive index, just can not influence the efficient of coupling and transmission light near the refractive index (n=1.404) of TECS covering.So refractive index n of sealant layer 25 of the present invention
25Equal or closely equal the refractive index n of optical fiber 14 coverings
14, promptly
Refractive index n as the corresponding TECS covering of the present invention
14The refractive index n of=1.404 usefulness sealant layers
25=1.406 organic silica gel, this be optimal almost be perfect solution, this head ruggedized construction does not influence the transmission of coupling efficiency and light, success ratio reaches 100%.
Description of drawings:
Fig. 1 is the top view structural drawing of coupled apparatus of the present invention
Fig. 2 is the A-A cross-sectional schematic of Fig. 1
Fig. 3 is the synoptic diagram of coupling fixed head 1 structure during B-B analyses and observe among Fig. 2.
Embodiment: as the structure of Fig. 1, Fig. 2, Fig. 3.Listed in the optical fiber 14 of the formation embodiment of the invention and the parameter of laser diode (LD) such as the following table.
| Example 1 | Example 2 | |
| The optical fiber feature | 3MCo?TECS
TM46 ° of (N of Hard Roll layer | 3MCo?TECS
TM46 ° of (N of Hard Roll layer |
| The | 4 watts of CW LD surface of emission W * H:300 μ m * 1 μ m beam divergence angle: θ ⊥～45°，θ ∥～10° | 1 watt of CW LD surface of emission W * H:200 μ m * 1 μ m beam divergence angle: θ ⊥～45°，θ ∥～10° |
| The coupled apparatus performance | Be provided with in the | |
Said tail optical fiber is exactly the connector core 8 of the connector 9 of optical fiber 14 tail ends that stretch out shell 26 lateral surfaces of the optical fiber 14 described in Fig. 1, Fig. 2 in the last table.
Claims (3)
1. the coupled apparatus of laser diode and optical fiber, contain:
＜1〉has the shell (26) of stationary housing screw (7) on the shell seat (17), be equipped with semiconductor cooler (18) on the shell seat (17) in the shell (26), place the laser diode (5) that also has optical fiber coupling head (13) in the shell (26) and have heat sink (20);
＜2〉reach the optical fiber (14) of the connector (9) that tail end band connector core (8) is arranged of shell (26) lateral surface, be with copper pipe (16) near on end optical fiber (14) cylindrical of shell (26) lateral surface, between copper pipe (16) and optical fiber (14) cylindrical heat-shrink tube (15) is arranged, reach shell (26) lateral surface and also have many lead-in wire electrodes (11);
It is characterized in that:
＜3〉heat sink copper billet (4) and the heat radiation copper billet (21) that has both to fuse above the semiconductor cooler (18) in shell (26);
＜4〉move towards to have on the centrosymmetric position groove (27) of smaller part circle at the upper surface upper edge of heat sink copper billet (4) optical fiber (14), on the heat sink copper billet (4) of groove (27) both sides vest fixing threaded hole (3) is arranged, put the circular hole (10) of thermistor on the heat sink copper billet (4) in addition;
＜5〉front end has the lenticular optical fiber coupling head of hemisphere (13) by placing the interior coupling fixed head (1) of groove (27) on the heat sink copper billet (4) to be fixed on the heat sink copper billet (4), be stamped fixedly vest (2) above the coupling fixed head (1), fixedly vest (2) is threaded onto interior the fixing of vest fixing threaded hole (3) of groove (27) both sides by fixed screw (19), fixedly vest (2) has packed layer (12) between the groove (27) on coupling fixed head (1) and the heat sink copper billet (4);
＜6〉place on the heat sink copper billet (4) of heat radiation copper billet (21) one sides with the center of the laser diode (5) of heat sink (20) and the central axis (OO) of optical fiber coupling head (13) and coincide;
＜7〉place the heat radiation copper billet (21) in the shell (26) upward photodetector (6) to be arranged the space, shell (26) seals, and shell is filled with dried nitrogen in (26).
2. the coupled apparatus of laser diode according to claim 1 and optical fiber, it is characterized in that being with thin sleeve pipe (24) on optical fiber (14) cylindrical on coupling fixed head (1) center of said fixed fiber coupling head (13), the outer metal sleeve (23) that is with of thin sleeve pipe (24), between optical fiber (14) and the thin sleeve pipe (24) and between thin sleeve pipe (24) and the metal sleeve (23) fixedly sealed layer (22) is being arranged, at fibre core that optical fiber coupling head (13) exposes and carefully between the sleeve pipe (24) sealant layer (25) is arranged.
3. the coupled apparatus of laser diode according to claim 1 and 2 and optical fiber is characterized in that the refractive index n of said sealant layer (25)
25Equal or be approximately equal to the refractive index n of optical fiber (14) covering
14, promptly
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99116935A CN1095549C (en) | 1999-09-30 | 1999-09-30 | Coupling device of laser diode and optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99116935A CN1095549C (en) | 1999-09-30 | 1999-09-30 | Coupling device of laser diode and optical fiber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1261158A true CN1261158A (en) | 2000-07-26 |
| CN1095549C CN1095549C (en) | 2002-12-04 |
Family
ID=5279599
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99116935A Expired - Fee Related CN1095549C (en) | 1999-09-30 | 1999-09-30 | Coupling device of laser diode and optical fiber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1095549C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1299409C (en) * | 2005-03-02 | 2007-02-07 | 中国科学院上海光学精密机械研究所 | Laser diode with single mode fiber coupling and spatial filter |
| CN102333495A (en) * | 2009-03-05 | 2012-01-25 | 株式会社藤仓 | The dental probe |
| CN110226268A (en) * | 2016-11-29 | 2019-09-10 | 莱瑟特尔公司 | Binode fibre coupled laser diode and correlation technique |
| CN112346180A (en) * | 2019-08-09 | 2021-02-09 | 汇聚科技（惠州）有限公司 | Method for packaging optical fiber and metal part |
-
1999
- 1999-09-30 CN CN99116935A patent/CN1095549C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1299409C (en) * | 2005-03-02 | 2007-02-07 | 中国科学院上海光学精密机械研究所 | Laser diode with single mode fiber coupling and spatial filter |
| CN102333495A (en) * | 2009-03-05 | 2012-01-25 | 株式会社藤仓 | The dental probe |
| CN110226268A (en) * | 2016-11-29 | 2019-09-10 | 莱瑟特尔公司 | Binode fibre coupled laser diode and correlation technique |
| CN112346180A (en) * | 2019-08-09 | 2021-02-09 | 汇聚科技（惠州）有限公司 | Method for packaging optical fiber and metal part |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1095549C (en) | 2002-12-04 |
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