CN201243158Y - Medium-infrared thulium doped optical fiber laser amplifier - Google Patents
Medium-infrared thulium doped optical fiber laser amplifier Download PDFInfo
- Publication number
- CN201243158Y CN201243158Y CNU200820151903XU CN200820151903U CN201243158Y CN 201243158 Y CN201243158 Y CN 201243158Y CN U200820151903X U CNU200820151903X U CN U200820151903XU CN 200820151903 U CN200820151903 U CN 200820151903U CN 201243158 Y CN201243158 Y CN 201243158Y
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- optical fiber
- thulium doped
- laser
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- fiber
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 64
- 229910052775 Thulium Inorganic materials 0.000 title claims abstract description 52
- FRNOGLGSGLTDKL-UHFFFAOYSA-N thulium atom Chemical compound [Tm] FRNOGLGSGLTDKL-UHFFFAOYSA-N 0.000 title claims abstract description 51
- 239000000835 fiber Substances 0.000 claims abstract description 62
- 238000005086 pumping Methods 0.000 claims abstract description 36
- 230000003287 optical effect Effects 0.000 claims abstract description 9
- 239000007787 solid Substances 0.000 claims description 14
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 238000005253 cladding Methods 0.000 abstract 4
- 238000005516 engineering process Methods 0.000 description 6
- 238000001816 cooling Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 229910052689 Holmium Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- KJZYNXUDTRRSPN-UHFFFAOYSA-N holmium atom Chemical compound [Ho] KJZYNXUDTRRSPN-UHFFFAOYSA-N 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
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Abstract
The utility model relates to a mid-infrared thulium doped fiber laser amplifier, being composed of a seed light source, an optical isolator, a focusing lens, a pumping light source, a multi-path optical fiber coupler, a double cladding thulium doped fiber, a collimating lens and a beam splitting sheet; the position relation is that: the optical isolator, the focusing lens, the multi-path optical fiber coupler, the double cladding thulium doped fiber, the collimating lens and the beam splitting sheet are sequentially arranged at the laser outputting direction of the seed light source, the input end of the seed optical fiber of the multi-path optical fiber coupler is arranged at the focal point of the focusing lens, and the output end of the seed optical fiber is welded with the double cladding thulium doped fiber, the other end of the double cladding thulium doped fiber is arranged at the front focal point of the collimating lens, and the beam splitting sheet and the outputting light beam of the collimating lens are arranged by taking a 45 degrees of included angle. The mid-infrared thulium doped fiber laser amplifier has better heat radiating property, thus improving the pumping power and being capable of obtaining mid-infrared laser outputting with high power.
Description
Technical field
The utility model relates to laser, particularly a kind of in the infrared thulium laser fiber amplifier of mixing.
Background technology
After fiber laser came out in 1963, developed into the fine technology of light harvesting, coupling technique and semiconductor laser technique in the emerging technology of one, and become research focus in the last few years with its compact conformation, high efficiency, small size, long-life, advantage such as non-maintaining easy to use.High power 2 micron waveband lasers all have important use in industry, biomedicine and military affairs, realize that more effectively the method for this wave band of laser has at present: 1, all solid state pumping singly mixes solid state laser (HO:YAG, Tm:YAG, Tm:YAP etc.); 2, two solid state lasers (Ho:Tm:YAG, Ho:Tm:LuLiF, Er:Tm:YAG, Tm:Ho:YLF etc.) of mixing of all solid state pumping; 3, a micron waveband laser obtains by the OPO technology; 4, all solid state pumping mixes thulium or mixes the holmium fiber laser; Above-mentioned first three methods or because problem such as the thermal effect of solid laser crystal or pump absorption band be narrow causes slope efficiency not high; Some can't realize tunable laser output; The pumping source that has needs 1.9 micron wavebands; The not high deficiency of OPO efficient.The thulium-doped fiber laser of all solid state pumping is owing to adopt fiber medium, and has the cross relaxation characteristic, obtains the laser output of high tiltedly efficient easily; Output laser is wideband adjustable; Pumping source is ripe 790nm wave band diode; But need by frequency-selecting or diode pumping technology, this causes the problem of inefficiency usually.Obtaining at present infrared thulium doped optical fiber laser output in the high power is how to reduce the heat problem of thulium doped fiber and how more pump power is transported in the thulium doped fiber and go.The heat problem of thulium doped fiber mainly concentrates on optic fibre input end face place, and method commonly used is that the optic fibre input end face portion is adopted conduction or direct water-cooling but, but because fiber end face only is the tens of centimeter length of hundreds of micron core diameter usually, is difficult to take into account cooling and pumping; We propose infrared thulium doped fiber amplifier in a kind of novel high-power for this reason, utilize the advantage of thulium-doped fiber laser, the mode of injecting by the exocoel seed obtains the space-time characterisation of mid-infrared laser simultaneously, and the use power of avoiding frequency-selecting and diode pumping to produce reduces problem; Adopt the multiple-path coupler mode to improve pumping to the power of optical fiber and take into account the cooling problem that solved.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, provide a kind of in infrared thulium doped optical fiber laser amplifier, this optical fiber laser amplifier should have heat dissipation characteristics preferably, improves pump power, to obtain the output of high power mid-infrared laser.
The technical scheme that the utility model adopted is:
Infrared thulium doped optical fiber laser amplifier in a kind of, the mode that adopts the exocoel seed to inject, N laser diode (LD) done pumping source, adopts the N+1 multiple-path coupler that pump light is introduced pumping double clad thulium doped fiber, and this double clad thulium doped fiber is done amplification medium.
Concrete structure of the present utility model:
Infrared thulium doped optical fiber laser amplifier in a kind of, this optical fiber laser amplifier is by seed light source, optical isolator, condenser lens, pump light source, the multi-channel optical fibre coupler, the double clad thulium doped fiber, collimating lens and beam splitting chip constitute, its position relation is: the laser outbound course at described seed light source is optical isolator successively, condenser lens, the multi-channel optical fibre coupler, the double clad thulium doped fiber, collimating lens and beam splitting chip, described multi-channel optical fibre coupler, be written as the N+1 fiber coupler, combine by coupler and a seed optical fiber by N root pumping optical fiber, described pump light source is connected with described many pumping optical fibers respectively, the input of described seed optical fiber and the focus that is positioned at described condenser lens, the output of this seed optical fiber welds mutually with described double clad thulium doped fiber, the other end of this double clad thulium doped fiber is positioned at the front focus of described collimating lens, described beam splitting chip is to be coated with 45 ° of pump lights are all-trans and to the anti-reflection deielectric-coating of seed light wavelength, the output beam of this beam splitting chip and described collimating lens is 45 ° of settings.
The input end face of described seed optical fiber is coated with the anti-reflection film to seed light.
Described pump light source is the 793nm laser diode, and perhaps 1568nm's mixes the Er fiber laser.
Described seed light source is the thulium-doped fiber laser of the small-sized continuous solid body laser of 2 micron wavebands or small-sized pulsed solid stale laser of 2 micron wavebands or gain modulation.
The utility model is compared with conventional art, has following advantage and good effect:
1, compare with common solid state laser, fiber amplifier has excellent heat dissipation characteristics;
2, adopt multiterminal N+1 pumping structure for amplifying, alleviating the thermal power density that the simple optical fiber fibre core is born, and can increase pumping effectively to as the power in the thulium doped fiber of amplification medium;
3, adopt the seed injection mode, the time response of control amplifier, spatial character and directivity, solve the inefficiency and the damage problem of the frequency-selecting of high power mid-infrared laser grating, during simultaneously as the pumping source of 3-12 laser micrometer, needing to have avoided diode pumping obtain problems such as pulsed light;
4, the pumping coupled modes that adopt pumping optical fiber and thulium doped fiber directly to weld, the problem that the high heat that produces in the time of can avoiding pump-coupling to the thulium doped fiber end face is difficult to cool off;
Description of drawings
Fig. 1 is the structural representation of infrared thulium doped fiber amplifier in the utility model high power;
Fig. 2 is a 8+1 road fiber coupler structural representation;
Among the figure: 1-seed source; 2-isolator; 3-condenser lens; 4-pump light source; 5-8+1 road fiber coupler; 6-double clad thulium doped fiber; 7-collimating lens; 8-beam splitting chip; 9-pumping optical fiber; 10-pumping optical fiber; 11-pumping optical fiber; 12-pumping optical fiber; 13-coupler; 14-seed optical fiber; 15-pumping optical fiber; 16-pumping optical fiber; 17-pumping optical fiber; 18-pumping optical fiber.
Embodiment
The utility model is described in further detail below in conjunction with embodiment and accompanying drawing, but should not limit protection range of the present utility model with this.
See also Fig. 1 and Fig. 2 earlier, Fig. 1 is the structural representation of infrared thulium doped fiber amplifier in the utility model high power, is the structural representation of a specific embodiment of the present utility model.Fig. 2 is a 8+1 road fiber coupler structural representation.As seen from the figure, infrared thulium doped optical fiber laser amplifier in the utility model, by seed light source 1, optical isolator 2, condenser lens 3, pump light source 4, multi-channel optical fibre coupler 5, double clad thulium doped fiber 6, collimating lens 7 and beam splitting chip 8 constitute, its position relation is: the laser outbound course at described seed light source 1 is optical isolator 2 successively, condenser lens 3, multi-channel optical fibre coupler 5, double clad thulium doped fiber 6, collimating lens 7 and beam splitting chip 8, described multi-channel optical fibre coupler 5 is by many pumping optical fibers 9,10,1,12,15,16,17,18 constitute by coupler 13 and a seed optical fiber 14, described pump light source 4 is made up of a plurality of laser diodes, respectively with described many pumping optical fibers 9,10,1,12,15,16,17,18 connect, the input of described seed optical fiber 14 and the focus that is positioned at described condenser lens 3, the output of this seed optical fiber 14 welds mutually with described double clad thulium doped fiber 6, the other end of this double clad thulium doped fiber 6 is positioned at the front focus of described collimating lens 7, described beam splitting chip 8 is to be coated with pump light 45 degree is all-trans and to the anti-reflection deielectric-coating of seed light wavelength, this beam splitting chip 8 is 45 ° of settings with the output beam of described collimating lens 7.The input end face of described seed optical fiber 14 is coated with the anti-reflection film to seed light.Described pump light source is the 793nm laser diode, and perhaps 1568nm's mixes the Er fiber laser.
Described seed light source 1 is the thulium-doped fiber laser of the small-sized continuous solid body laser of 2 micron wavebands or small-sized pulsed solid stale laser of 2 micron wavebands or gain modulation.
As shown in Figure 2 be 8+1 road fiber coupler 5, can import 8 road pump lights in optical fiber, with the seed light B end output from seed optical fiber 14 through coupler 13 coupling backs by seed optical fiber 14, B holds and welds mutually with an end of double clad thulium doped fiber 6; 6 is the double clad thulium doped fiber; 7 is collimating lens; 8 is beam splitting chip, is coated with pump light 45 degree are all-trans and 2 microns anti-reflection deielectric-coating.
Wherein the course of work is that seed light 1 and multichannel pump light 4 carry out pumping and seed light injection through 5 pairs of double clad thulium doped fibers of multi-channel optical fibre coupler 6; Wherein inject time response, spatial character and the directivity of control amplifier by seed; Because the special construction of multi-channel optical fibre coupler 5 can effectively reduce the pump power density that the fiber end face unit are is born, reduce influence of thermal effect, accept more pump light; The B end of double clad thulium doped fiber 14 welds mutually with an end of double clad thulium doped fiber 6, can carry out the integral body cooling to double clad thulium doped fiber 6 like this, effectively solves the problem that the thulium doped fiber input end face is difficult to fine cooling, can solve the heat problem of medium optical fiber.Double clad thulium doped fiber 6 is as the gain amplifier medium and transmit laser.The mid-infrared laser that produces through after the collimating lens 7 collimation outputs by beam splitting chip 8 beam split after as the pumping source of high power 3-12 laser micrometer or directly apply on biomedicine, remote sensing technology, optical communication, the radar.
Different pump powers can obtain different capacity laser output, select different seed sources can obtain different output spectrums, continuously or the mid-infrared laser of pulse.If adopt the optical fiber seed source, can also realize infrared thulium doped fiber amplifier in the full fiberize.In a word, the utility model laser has heat dissipation characteristics preferably, has improved pump power, can obtain the output of high power mid-infrared laser.
Claims (4)
1, infrared thulium doped optical fiber laser amplifier in a kind of, it is characterized in that by seed light source (1), optical isolator (2), condenser lens (3), pump light source (4), multi-channel optical fibre coupler (5), double clad thulium doped fiber (6), collimating lens (7) and beam splitting chip (8) constitute, its position relation is: the laser outbound course at described seed light source (1) is optical isolator (2) successively, condenser lens (3), multi-channel optical fibre coupler (5), double clad thulium doped fiber (6), collimating lens (7) and beam splitting chip (8), described multi-channel optical fibre coupler (5) is by many pumping optical fibers (9,10,1,12,15,16,17,18) constitute by coupler (13) and a seed optical fiber (14), described pump light source (4) respectively with described many pumping optical fibers (9,10,1,12,15,16,17,18) connect, the input of described seed optical fiber (14) and the focus that is positioned at described condenser lens (3), the output of this seed optical fiber (14) welds mutually with described double clad thulium doped fiber (6), the other end of this double clad thulium doped fiber (6) is positioned at the front focus of described collimating lens (7), described beam splitting chip (8) is to be coated with pump light 45 degree is all-trans and to the anti-reflection deielectric-coating of seed light wavelength, this beam splitting chip (8) is 45 ° of settings with the output beam of described collimating lens (7).
2, infrared thulium doped optical fiber laser amplifier in according to claim 1, the input end face that it is characterized in that described seed optical fiber (14) is coated with the anti-reflection film to seed light.
3, infrared thulium doped optical fiber laser amplifier in according to claim 1 is characterized in that described pump light source is the 793nm laser diode, and perhaps 1568nm's mixes the Er fiber laser.
4, infrared thulium doped optical fiber laser amplifier in according to claim 1 is characterized in that described seed light source (1) is the thulium-doped fiber laser of the small-sized continuous solid body laser of 2 micron wavebands or small-sized pulsed solid stale laser of 2 micron wavebands or gain modulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820151903XU CN201243158Y (en) | 2008-08-13 | 2008-08-13 | Medium-infrared thulium doped optical fiber laser amplifier |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820151903XU CN201243158Y (en) | 2008-08-13 | 2008-08-13 | Medium-infrared thulium doped optical fiber laser amplifier |
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| CN201243158Y true CN201243158Y (en) | 2009-05-20 |
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| CNU200820151903XU Expired - Lifetime CN201243158Y (en) | 2008-08-13 | 2008-08-13 | Medium-infrared thulium doped optical fiber laser amplifier |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102332673A (en) * | 2011-08-05 | 2012-01-25 | 厦门大学 | Mid-infrared light source based on acousto-optic effect and optical fibre amplifier |
| CN102332672A (en) * | 2011-08-05 | 2012-01-25 | 厦门大学 | Tunable mid-infrared light source based on micro-chip laser and optical fibre amplifier |
| CN102332670A (en) * | 2011-08-05 | 2012-01-25 | 厦门大学 | Tunable mid-infrared light source based on electrooptic effect and optical fiber amplifier |
| CN103855596A (en) * | 2012-12-06 | 2014-06-11 | 清华大学 | Ytterbium-mixed optical fiber amplification system |
-
2008
- 2008-08-13 CN CNU200820151903XU patent/CN201243158Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102332673A (en) * | 2011-08-05 | 2012-01-25 | 厦门大学 | Mid-infrared light source based on acousto-optic effect and optical fibre amplifier |
| CN102332672A (en) * | 2011-08-05 | 2012-01-25 | 厦门大学 | Tunable mid-infrared light source based on micro-chip laser and optical fibre amplifier |
| CN102332670A (en) * | 2011-08-05 | 2012-01-25 | 厦门大学 | Tunable mid-infrared light source based on electrooptic effect and optical fiber amplifier |
| CN103855596A (en) * | 2012-12-06 | 2014-06-11 | 清华大学 | Ytterbium-mixed optical fiber amplification system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: NAIJING ZHONGKE SHENGUANG TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: SHANGHAI OPTICAL PRECISION MACHINERY INST., CHINESE ACADEMY OF SCIENCES Effective date: 20130306 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 201800 JIADING, SHANGHAI TO: 210038 NANJING, JIANGSU PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20130306 Address after: 210038 No. 19, Heng Fei Road, Nanjing economic and Technological Development Zone, Jiangsu, Nanjing Patentee after: Naijing Zhongke Shenguang Technology Co., Ltd. Address before: 201800 Shanghai 800-211 post office box Patentee before: Shanghai Optical Precision Machinery Inst., Chinese Academy of Sciences |
|
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Nanjing Zhongke Raycham Technology Co., Ltd. Assignor: Naijing Zhongke Shenguang Technology Co., Ltd. Contract record no.: 2015320000256 Denomination of utility model: Medium-infrared thulium doped optical fiber laser amplifier Granted publication date: 20090520 License type: Common License Record date: 20150417 |
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| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090520 |