CN101666890B - High-power optical fiber collimator and manufacturing method thereof - Google Patents
High-power optical fiber collimator and manufacturing method thereof Download PDFInfo
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- CN101666890B CN101666890B CN2008101508063A CN200810150806A CN101666890B CN 101666890 B CN101666890 B CN 101666890B CN 2008101508063 A CN2008101508063 A CN 2008101508063A CN 200810150806 A CN200810150806 A CN 200810150806A CN 101666890 B CN101666890 B CN 101666890B
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Abstract
The invention discloses a high-power optical fiber collimator and a manufacturing method thereof. The high-power optical fiber collimator comprises a capillary tube, a glass tube and a copper sleeve, wherein the capillary tube, the glass tube and the copper sleeve are sheathed layer by layer from inside to outside; the capillary tube and the glass tube are adhered by an epoxy adhesive A; and the glass tube and the copper sleeve are adhered by the epoxy adhesive A. The high-power optical fiber collimator also comprises a doubly clad optical fiber, wherein the doubly clad optical fiber is fixed in the capillary tube and adhered by an epoxy adhesive B. The refractive index of the epoxy adhesive B is lower than that of an internal clad optical fiber; the doubly clad optical fiber and the capillary tube which are fixed together have an emergent end face which is ground and polished; a coupling lens is also arranged at an emergent place of the emergent end face; the doubly clad optical fiber, the capillary tube, the emergent end face and the coupling lens which are fixed together are positioned in the glass tube; and the coupling lens and the glass tube are adhered by the epoxy adhesive A. The high-power optical fiber collimator and the manufacturing method thereof greatly improve the bearing peak value power of the optical fibers and can be applied in a high-power optical fiber isolator and a high-power optical fiber laser around a 1,064nm waveband.
Description
Technical field
The present invention relates to a kind of optical fiber collimator and manufacture method thereof, be specifically related to a kind of optical fiber collimator and the manufacture method thereof that can carry the high power laser light input and output.
Background technology
In recent years, near realize single-mode fiber output laser the 1064nm wave band high-capacity optical fiber laser was used rapidly in fields such as optical communication, materials processing, medical science, information stores, laser printing, monitoring and laser spectrums.Along with improving constantly of laser output power, must use focusing or the output that high-power optical fiber collimator is realized high power laser light in the light path.The optical fiber collimator of using in traditional optical fiber telecommunications system all is a low power devices, its load power is usually below 500mW, and its application band mostly is near the communication window 1310nm and the 1550nm, and this type optical fiber collimating apparatus can not be applied in the 1064nm laser output system.And the single-mode fiber core diameter that existing 1064nm optical fiber collimator adopts is about 6.2um, and the laser power that optical fiber collimator can carry is subjected to the restriction of fiber core at superficial film place laser damage threshold.
Chinese patent application 02154783.1, " high-power fiber coupling ", the method at one section no cladding glass optical fiber of single-mode fiber exit end welding of proposition, and adopt GRIN Lens to realize collimation output.There is following shortcoming in the implementation of this patent:
1) core material of single-mode fiber is a quartz material, and its softening temperature is about 1750 ℃, and glass optical fiber will be softened at 1000 ℃, and the welding between them is not easy to realize;
2) GRIN Lens is to be made of a variety of materials, and its refractive index radially changes in gradient, high power laser light incident, and easier generation self-focusing phenomenon, this phenomenon can make the light beam temperature of regional area increase several magnitude, have limited the peak power of laser output;
3) contain the platinum snotter usually in the GRIN Lens material, these snotteres can absorb luminous energy and be heated, and along with absorbing increasing of heat, snotter will be vaporized, and cause the lens cracking.
Summary of the invention
The objective of the invention is to propose a kind of optical fiber collimator and the manufacture method thereof that can carry the high power laser light input and output, can be applied in 1064nm the wave band neighbouring high-power fiber optic isolator and high-capacity optical fiber laser.
Technical solution of the present invention is:
A kind of high-power optical fiber collimator comprises the kapillary 102 of layer overlaps from inside to outside, glass tube 105 and copper sleeve 107, and described kapillary 102 is all bonding by epoxy glue A106 with copper sleeve 107 with glass tube 105 and glass tube 105,
Its special character is:
Also comprise doubly clad optical fiber 101, described doubly clad optical fiber 101 is fixed in the kapillary 102, and it is bonding by epoxy glue B103, the refractive index of described epoxy glue B103 is lower than the refractive index of inner cladding optical fiber 101, can effectively reduce the light leakage phenomena that optical fiber transmits like this in kapillary 102, improve transfer efficiency;
Described doubly clad optical fiber 101 and the outgoing end face 108 of kapillary 102 that is fixed in together with a grinding and polishing, described outgoing end face 108 outgoing place also are provided with coupled lens 104, described doubly clad optical fiber 101, kapillary 102, outgoing end face 108 and the coupled lens 104 that is fixed in together all is positioned at glass tube 105, and described coupled lens 104 is bonding by epoxy glue A106 with glass tube 105.Wherein epoxy glue A106 and epoxy glue B103 can adopt the glue of 353ND glue or other similar performance.
Above-mentioned doubly clad optical fiber 101 sandwich layer diameters are 15～30um, and the inner cladding diameter is 130～400um, and the coat diameter is 250um～550um.
Above-mentioned outgoing end face 108 has been coated with the antireflecting film of anti-the high power.
Above-mentioned outgoing end face 108 is planar end surface or angled end-face; When it was angled end-face, the oblique angle was 2～10 degree, can reduce the return loss of emergent light.。
Above-mentioned kapillary 102 is quartz glass capillary or borate glass kapillary.
Above-mentioned coupled lens 104 both sides have been coated with the antireflecting film of anti-the high power.
Above-mentioned glass tube 105 is quartz glass tube or borate glass pipe.
Above-mentioned copper sleeve 107 surfaces are gold-plated surface, are convenient to the welding encapsulation with other parts like this.
A kind of method of making high-power optical fiber collimator, its special character are that this manufacture method may further comprise the steps:
1) removes the part surface coat of doubly clad optical fiber 101 1 ends, and clean totally standby with alcohol;
2) kapillary 102 of selected and used doubly clad optical fiber 101 diameters coupling is clean through ultrasonic cleaning kapillary 102, places stationary fixture, and stationary fixture keeps 70～110 ℃ of steady temperatures;
3) an amount of epoxy glue B103 on kapillary 102 hydraucone place's points, epoxy glue B103 melts fast, the part that doubly clad optical fiber 101 has been shelled coat is inserted in the endoporus of kapillary 102 and exposes a part outside the unflared end face of kapillary 102 immediately, after a few minutes, doubly clad optical fiber 101 is fixed among the kapillary 102;
4) doubly clad optical fiber 101 that is fixed together is taken out from stationary fixture with kapillary 102, remove doubly clad optical fiber 101 unnecessary outside the unflared end face of kapillary 102, grind, polish;
5) glass tube 105 is placed stationary fixture again, stationary fixture keeps 70～110 ℃ of steady temperatures, coupled lens 104 is inserted in the end of glass tube 105, and an amount of epoxy glue A106 on the point, this epoxy glue solidified within 3 minutes.
6) kapillary 102 of band doubly clad optical fiber 101 is inserted the glass tube other end, tail optical fiber connects the light source of power greater than 20W, at 70～110 ℃ of relative position and relative angles of regulating kapillary 102 and coupled lens 104 down of temperature, after treating that the relative position of kapillary 102 and coupled lens 104 and relative angle regulate, locate an amount of epoxy glue on the point in the kapillary 102 and the slit of glass tube 105, epoxy glue is in minutes by being melted to curing;
7) after the kapillary 102 of magnetic tape trailer fibre and coupled lens 104 are fixed by glass tube 105, from stationary fixture, take out, inserting and placing temperature is in 70～110 ℃ the copper sleeve 107 of anchor clamps, an amount of epoxy glue A106 on copper sleeve 107 inboard points, this epoxy glue is after solidifying within 3 minutes, placing temperature again is 70～110 ℃ oven for baking 2 hours, must this high-power optical fiber collimator.
70～110 ℃ of steady temperatures realize by heating arrangement and sensor in the above steps, promptly use the sensor reading temperature data, if temperature is lower than 70～110 ℃ scope heating arrangement heat temperature raising,, temperature closes the heating arrangement cooling if being higher than 70～110 ℃ scope.
In above-mentioned steps 6) in, locate also to comprise before an amount of epoxy glue on the point that in the kapillary 102 and the slit of glass tube 105 one detects step, this detection step is specially at the opposite side of coupled lens 104 and places standard fiber collimating apparatus and power meter, but detects the parameter of insertion loss, operating distance and the bearing peak value power of the optical fiber collimator of manufacturing; When these parameters meet the requirements, carry out locating the step of an amount of epoxy glue on the point again in the kapillary 102 and the slit of glass tube 105.
The invention has the advantages that:
1) adopt doubly clad optical fiber to realize the single mode input and output, can improve the bearing peak value power of optical fiber greatly, this doubly clad optical fiber is that the power density of the single-mode fiber carrying of 6.2um has improved 6～23 times than traditional core diameter.
2) adopt a kind of refractive index to fix naked fibre in kapillary, can effectively reduce the light leakage phenomena that optical fiber transmits in kapillary, improve transfer efficiency a little less than the epoxy glue of inner cladding refractive index.
3) adopt the high temperature method that is heating and curing, only adopt a kind of epoxy glue, technological process is simply orderly, has significantly reduced manufacturing time.The method complexity that traditional employing epoxy glue solidifies, technological process is many, manufacturing time is long, such as optical fiber and intercapillary fixing, fixing between coupled lens and the glass tube, fixing between the kapillary of magnetic tape trailer fibre and the glass tube, fixing between glass tube and the copper sleeve, all be that point is gone up an amount of epoxy glue earlier, and then some ultra-violet curing glue, after ultra-violet curing glue solidifies with ultraviolet source irradiation, again optical fiber and kapillary, coupled lens and glass tube, the kapillary of magnetic tape trailer fibre and glass tube, glass tube and copper sleeve, take oven for baking respectively about 2 hours, the baking of reciprocation cycle like this, not only can influence the performance parameter of product, and consume production time greatly.
4) method of test package under the employing high temperature, the optimizing performance parameters that can make high-power optical fiber collimator is at high temperature, and this environment for use with high-power optical fiber collimator is consistent.Because high-power optical fiber collimator is applied in the high power laser light transmission system, can produce certain high temperature at incident outgoing interface, its performance parameter can be more reliable in use for the optical fiber collimator that performance parameter is effectively guaranteed under the high temperature like this.
5) method that adopts high temperature in time to encapsulate down can be finely tuned the kapillary of magnetic tape trailer fibre in encapsulation process, can make the performance parameter of high-power optical fiber collimator reach best.Because be heating and curing after a few minutes with epoxy glue, its performance parameter can settle out, and toasts 2 hours again, just removes the micro-moisture in the epoxy glue, increases reliability of products and serviceable life, to the almost not influence of its optical performance parameter.Epoxy glue solidifies the stress relief that produces and causes the little of sticky object position to move in first few minutes, be to make the product main cause that performance parameter changes after baking, and traditional employing ultra-violet curing glue is fixing earlier, toast the method for epoxy glue again, can not in the first few minutes of baking, finely tune, make that the performance parameter of toasting the back product takes place to worsen and can't revise again the position of sticky object.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Drawing reference numeral explanation: 101-doubly clad optical fiber; 102-kapillary; 103-epoxy glue B; 104-coupled lens; 105-glass tube; 106-epoxy glue A; 107-copper sleeve; 108-outgoing end face.
Embodiment
Referring to Fig. 1, a kind of high-power optical fiber collimator, comprise that a kind of core diameter is that 15um, inner cladding are that 130um, coat are the doubly clad optical fiber 101 of 250um, kapillary 102 with doubly clad optical fiber 101 couplings, epoxy glue B103, coupled lens 104, glass tube 105, plant epoxy glue A106, copper sleeve 107, bonding between doubly clad optical fiber 101 and the kapillary 102 by epoxy glue B103, between coupled lens 104 and the glass tube 105, between kapillary 102 and the glass tube 105, all be bonding between glass tube 105 and the copper sleeve 107 by epoxy glue A106.
Wherein doubly clad optical fiber 101 can be that core diameter is that 20um, inner cladding are that 400um and coat are the doubly clad optical fiber of 550um, can be that core diameter is that 30um, inner cladding are that 250um and coat are the doubly clad optical fiber of 400um, can also be that core diameter is that 30um, inner cladding are that 400um, coat are the doubly clad optical fiber of 550um.
A kind of method of making above-mentioned high-power optical fiber collimator may further comprise the steps:
1) removes the part surface coat of doubly clad optical fiber 101 1 ends, and clean totally standby with alcohol;
2) kapillary 102 of selected and used doubly clad optical fiber 101 diameters coupling is clean through ultrasonic cleaning kapillary 102, places stationary fixture, and stationary fixture keeps 70～110 ℃ of steady temperatures;
3) an amount of epoxy glue B103 on kapillary 102 hydraucone place's points, epoxy glue B103 melts fast, the part that doubly clad optical fiber 101 has been shelled coat is inserted in the endoporus of kapillary 102 and exposes a part outside the unflared end face of kapillary 102 immediately, epoxy glue B103 solidifies within 3 minutes, and doubly clad optical fiber 101 is fixed among the kapillary 102;
4) doubly clad optical fiber 101 that is fixed together is taken out from stationary fixture with kapillary 102, remove doubly clad optical fiber 101 unnecessary outside the unflared end face of kapillary 102, grind, polish;
5) glass tube 105 is placed stationary fixture again, stationary fixture keeps 70～110 ℃ of steady temperatures, coupled lens 104 is inserted in the end of glass tube 105, and an amount of epoxy glue A106 on the point, this epoxy glue A106 solidified within 3 minutes.
6) kapillary 102 of band doubly clad optical fiber 101 is inserted glass tube 105 other ends, tail optical fiber connects the light source of power greater than 20W, at 70～110 ℃ of relative position and relative angles of regulating kapillary 102 and coupled lens 104 down of temperature, after treating that the relative position of kapillary 102 and coupled lens 104 and relative angle regulate, opposite side at coupled lens 104 is placed standard fiber collimating apparatus and power meter, but detects the parameter of insertion loss, operating distance and the bearing peak value power of the optical fiber collimator of manufacturing; When these parameters meet the requirements, an amount of epoxy glue A106 on place, the slit point of kapillary 102 and glass tube 105, this epoxy glue A106 within 3 minutes by being melted to curing;
7) after the kapillary 102 of magnetic tape trailer fibre and coupled lens 104 are fixed by glass tube 105, from stationary fixture, take out, inserting and placing temperature is in 70～110 ℃ the copper sleeve 107 of anchor clamps, an amount of epoxy glue A106 on copper sleeve 107 inboard points, this epoxy glue A106 is after solidifying within 3 minutes, placing temperature again is 70～110 ℃ oven for baking 2 hours, must this high-power optical fiber collimator.
70～110 ℃ of steady temperatures realize by heating arrangement and sensor in each step, promptly use the sensor reading temperature data, if temperature is lower than 70～110 ℃ scope heating arrangement heat temperature raising,, temperature closes the heating arrangement cooling if being higher than 70～110 ℃ scope.
Claims (10)
1. high-power optical fiber collimator, comprise the kapillary of layer overlaps (102) from inside to outside, glass tube (105) and copper sleeve (107), described kapillary (102) is all bonding by epoxy glue A (106) with copper sleeve (107) with glass tube (105) and glass tube (105)
It is characterized in that:
Also comprise doubly clad optical fiber (101), described doubly clad optical fiber (101) is fixed in the kapillary (102), and bonding by epoxy glue B (103), and the refractive index of described epoxy glue B (103) is lower than the refractive index of the inner cladding optical fiber of doubly clad optical fiber (101);
Described doubly clad optical fiber (101) and the outgoing end face (108) of kapillary (102) that is fixed in together with a grinding and polishing, described outgoing end face (108) outgoing place also is provided with coupled lens (104), described doubly clad optical fiber (101), kapillary (102), outgoing end face (108) and the coupled lens (104) that is fixed in together all is positioned at glass tube (105), and described coupled lens (104) is bonding by epoxy glue A (106) with glass tube (105).
2. according to the described high-power optical fiber collimator of claim 1, it is characterized in that: described doubly clad optical fiber (101) sandwich layer diameter is 15～30um, and the inner cladding diameter is 130～400um, and the coat diameter is 250um～550um.
3. according to the described high-power optical fiber collimator of claim 1, it is characterized in that: described outgoing end face (108) has been coated with the antireflecting film of anti-the high power.
4. according to the arbitrary described high-power optical fiber collimator of claim 1～3, it is characterized in that: described outgoing end face (108) is planar end surface or angled end-face; When it was angled end-face, the oblique angle was 2～10 degree.
5. according to the described high-power optical fiber collimator of claim 4, it is characterized in that: described kapillary (102) is quartz glass capillary or borate glass kapillary.
6. according to the described high-power optical fiber collimator of claim 5, it is characterized in that: described coupled lens (104) both sides have been coated with the antireflecting film of anti-the high power.
7. according to the described high-power optical fiber collimator of claim 6, it is characterized in that: described glass tube (105) is quartz glass tube or borate glass pipe.
8. according to the described high-power optical fiber collimator of claim 7, it is characterized in that: described copper sleeve (107) surface is gold-plated surface.
9. a method of making the described high-power optical fiber collimator of claim 1 is characterized in that, this manufacture method may further comprise the steps:
1) removes the part surface coat of doubly clad optical fiber (101) one ends, and clean totally standby with alcohol;
2) the selected kapillary (102) that mates with used doubly clad optical fiber (101) diameter is clean through ultrasonic cleaning kapillary (102), places stationary fixture, and stationary fixture keeps 70～110 ℃ of steady temperatures;
3) go up an amount of epoxy glue B (103) at kapillary (102) hydraucone place's point, epoxy glue B (103) melts fast, the part that doubly clad optical fiber (101) has been shelled coat is inserted in the endoporus of kapillary (102) and exposes a part outside the unflared end face of kapillary (102) immediately, epoxy glue B (103) solidifies within 3 minutes, and doubly clad optical fiber (101) is fixed among the kapillary (102);
4) doubly clad optical fiber that is fixed together (101) and kapillary (102) are taken out from stationary fixture, remove doubly clad optical fiber (101) unnecessary outside the unflared end face of kapillary (102), grind, polish;
5) glass tube (105) is placed stationary fixture again, stationary fixture keeps 70～110 ℃ of steady temperatures, coupled lens (104) is inserted in the end of glass tube (105), and an amount of epoxy glue A (106) on the point, this epoxy glue solidified within 3 minutes;
6) kapillary (102) of band doubly clad optical fiber (101) is inserted glass tube (105) other end, tail optical fiber connects the light source of power greater than 20W, at 70～110 ℃ of relative position and relative angles of regulating kapillary (102) and coupled lens (104) down of temperature, after treating that the relative position of kapillary (102) and coupled lens (104) and relative angle regulate, point is gone up an amount of epoxy glue A (106) at the place, slit of kapillary (102) and glass tube (105), this epoxy glue A (106) within 3 minutes by being melted to curing;
7) after kapillary of magnetic tape trailer fibre (102) and coupled lens (104) are fixed by glass tube (105), from stationary fixture, take out, inserting and placing temperature is in the copper sleeve (107) of 70～110 ℃ anchor clamps, go up an amount of epoxy glue A (106) at the inboard point of copper sleeve (107), this epoxy glue A (106) is after solidifying within 3 minutes, placing temperature again is 70～110 ℃ oven for baking 2 hours, must this high-power optical fiber collimator.
10. according to the method for the described manufacturing high-power optical fiber collimator of claim 9, it is characterized in that: in described step 6), before going up an amount of epoxy glue, the kapillary (102) and place, the slit point of glass tube (105) comprise that also one detects step, this detection step is specially at the opposite side of coupled lens (104) and places standard fiber collimating apparatus and power meter, but detects the parameter of insertion loss, operating distance and the bearing peak value power of the optical fiber collimator of manufacturing; When these parameters meet the requirements, carry out going up the step of an amount of epoxy glue A (106) again at the kapillary (102) and place, the slit point of glass tube (105).
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| CN107991773A (en) * | 2017-11-30 | 2018-05-04 | 上海伟钊光学科技股份有限公司 | The production method of optical fiber optical path pool |
| CN109870826A (en) * | 2017-12-01 | 2019-06-11 | 福州高意通讯有限公司 | A kind of collimator structure and preparation method thereof |
| CN111308400A (en) * | 2019-12-02 | 2020-06-19 | 哈尔滨工程大学 | Optical fiber vector magnetic field sensing probe based on magnetic fluid and manufacturing method thereof |
| CN110989089A (en) * | 2019-12-27 | 2020-04-10 | 光越科技(深圳)有限公司 | Polarization maintaining optical fiber head and collimator |
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