CN1461082A - Optical fibre lateral edge coupling method of pumping light source - Google Patents
Optical fibre lateral edge coupling method of pumping light source Download PDFInfo
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- CN1461082A CN1461082A CN 03128067 CN03128067A CN1461082A CN 1461082 A CN1461082 A CN 1461082A CN 03128067 CN03128067 CN 03128067 CN 03128067 A CN03128067 A CN 03128067A CN 1461082 A CN1461082 A CN 1461082A
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 173
- 238000010168 coupling process Methods 0.000 title claims abstract description 69
- 238000005086 pumping Methods 0.000 title claims abstract description 40
- 230000008878 coupling Effects 0.000 claims abstract description 35
- 238000005859 coupling reaction Methods 0.000 claims abstract description 35
- 239000000835 fiber Substances 0.000 claims description 98
- 230000011218 segmentation Effects 0.000 claims description 17
- 239000011241 protective layer Substances 0.000 claims description 16
- 230000005540 biological transmission Effects 0.000 claims description 3
- 239000000155 melt Substances 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 6
- 230000003287 optical effect Effects 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 12
- 238000005516 engineering process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000010147 laser engraving Methods 0.000 description 1
- 238000010330 laser marking Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The present invention relates to an optical fibre side edge coupling method for pumping light source, and includes the following steps: using MM optical fibre as pump input optical fibre, DC optical fibre as one fo producing amplifier or laser, removing protecting layer in the MM optical fibre and DC optical fibre coupled zone and coiling the coupled part of DC optical fibre. The coupling of the above-mentioned two optical fibres adopts chemical contact, i.e. they are mutually molten or mutually combined together. Said invention not only raises the coupling efficiency, but also can make DC optical fibre obtain uniformly pumping and can raise the conversion efficiency from pumping light source to optical fibre laser output.
Description
Technical field
The present invention relates to a kind of optical fiber side coupling process that is applicable to the even sectional pumping of having of fiber amplifier, fiber laser, it can be effectively be coupled to the light source (not being terminal) from any line segment of multimode double clad (DC) optical fiber of multiple die semiconductor laser the DC optical fiber, be used to make high-power output, the fiber amplifier of high conversion efficiency and optical-fiber laser.Its application comprises Networks of Fiber Communications, the processing of metal and nonmetallic materials and processing, laser engraving, laser marking, laser welding, weld seam is handled, accurate punching, laser detection and measurement, laser radar system, laser free-space communication, sensing technology and laser medicine etc.Its output wavelength from 0.8nm to 2000nm more than, output continuous light power from hundreds of milliwatts to thousands of watts.
Background technology
In fiber amplifier and optical-fiber laser technology, how high efficiency one of technology that it is crucial be exactly pump light source to be coupled in the DC optical fiber.The method for pumping of DC optical fiber has two big classes, the one, the termination pumping of optical fiber, promptly utilize optical element or optical fiber that pump light source directly is coupled into by the end of DC optical fiber, the 2nd, the side pumping of DC optical fiber, pumping soon is coupled along the line segment of DC optical fiber, and the side coupling technique of optical fiber has more superiority than end coupling technique: two terminations that 1, stay optical fiber are for other purposes; 2, can carry out the piecewise uniform pumping, improve the conversion efficiency of medium; 3, be convenient to more high-power light source is coupled in the DC optical fiber, can allow to design very high-power fiber amplifier of output or optical-fiber laser.
Gapontsev, people such as V.P (United States Patent (USP) U.S.5,999,673), invented limit coupling process between a kind of multimode fiber, as shown in Figure 1, touch on a DC optical fiber the multimode fiber (mm fiber) of drawing-down gradually is molten, this method can realize high coupling efficiency, but will realize the piecewise uniform pumping, need a plurality of side Coupling points and a plurality of pump light source, increase the difficulty that in fact realizes.
Grudimin.A.B. wait people's (international monopoly, WO 00/67350) to invent the limit coupling process that pumping optical fiber and DC optical fiber contact with each other, its principle because pumping optical fiber does not have drawing-down, is difficult to obtain high coupling efficiency as shown in Figure 2.
Summary of the invention
Technical problem to be solved by this invention is to provide to be had the pumping of high coupling efficiency sectional, can effectively control the limit coupling process of pump light source along the distribution of DC optical fiber between a kind of multimode fiber.Solve fiber amplifier, the pump light source coupled problem of optical-fiber laser is made high-power output, the fiber amplifier of high conversion efficiency and the needs of fiber laser to satisfy.
The present invention is as follows for the technical scheme that problem adopted of the above-mentioned proposition of solution: comprise that mm fiber (multimode fiber) is as the pumping input optical fibre; DC optical fiber (double clad multimode fiber) is as the optical fiber that produces amplifier or laser; protective layer is removed in the zone that it is characterized in that the coupling of mm fiber and DC optical fiber; coupled section coiled circle with DC optical fiber; with the coupling regime of mm fiber; DC optical fiber is to remove protective layer; the coupling of DC optical fiber and mm fiber is that optics contacts, and the optics contact refers to melt mutually and touches or abut against together mutually.
Press such scheme, can will remove the mm fiber drawing-down gradually of protective layer, make mm fiber have a cross section that diminishes at coupling regime.
DC optical fiber can make it be formed with a plurality of cross sections in coupled section around multi-turn to carry out optics with the mm fiber cross section and contact, to improve coupling efficiency.
In the molten zone of touching that DC optical fiber and mm fiber are coupled, realize that the concrete grammar of optics contact is as follows: (1) removes the molten protective layer that touches the zone of mm fiber; (2) draw the awl machine molten zone of touching of drawing-down mm fiber gradually with optical fiber, the fibre diameter of drawing-down is by formula: fibre diameter * numerical aperture=constant decision; (3) DC optical fiber pitch of the laps, the number of turns of pitch of the laps in the molten zone of touching of every circle, is removed the protective layer of DC optical fiber by using decision; (4) touch the zone molten, the mm fiber of tussle DC optical fiber and drawing-down makes good optics contact between them; (5) molten DC optical fiber and the mm fiber of touching of high temperature.
Press such scheme, the core structure of described DC optical fiber can be comprise single mode or other core structure such as annular core structure.
Described mm fiber drawing-down zone gradually is molten after touch with the zone that coiled circle DC optical fiber removes protective layer, mm fiber has two inputs and is used to introduce pump light source, can keep this two inputs, then light source is coupled in the DC optical fiber of pitch of the laps respectively along clockwise and transmission counterclockwise, forms two directional pump; Perhaps remove an input of mm fiber, only stay an input, form unidirectional pumping.
Press such scheme, the DC optical fiber of coiled circle can be molten the touching in a cross section that forms two cross sections and mm fiber around two circles, also can be to form three cross sections or melt around one or more cross sections that multi-turn forms a plurality of cross sections and mm fiber around three circles to touch, the number of pitch of the laps be to determine according to the needs of the length of DC optical fiber and application.
Described pitch of the laps DC optical fiber, the length of its every circle can be identical or different.
Press such scheme, mm fiber can be single, also can be many, if many mm fibers can be identical pumping optical fibers, also can be different.Simultaneously, DC optical fiber can be single, also can be many, and when adopting many DC optical fiber, many DC optical fiber can be identical, also can be different.
Press such scheme; if when adopting many DC optical fiber; or when adopting a plurality of pitch of the laps, mm fiber with the molten zone of touching of DC optical fiber, can be drawing-down gradually; or drawing-down a little; or only remove not drawing-down of protective layer, similarly, the DC optical fiber of coiled circle with the molten zone of touching of mm fiber; can not drawing-down, also drawing-down a little.
Described DC optical fiber can be by being coupled near near the zone the two ends and a mm fiber.
Press such scheme, if DC optical fiber is the segmentation pitch of the laps, then mm fiber can by unidirectional pumping or two directional pump respectively independently with the DC optical fiber coupling of a plurality of pitch of the laps of segmentation, at this moment, mm fiber has a plurality of pumping inputs, mm fiber also can be that pumping optical fiber has only two inputs like this by a plurality of DC optical fiber pitch of the laps couplings of a mm fiber to each segmentation simultaneously.
Press such scheme, on the DC of a plurality of pitch of the laps of segmentation optical fiber, introduce the fiber grating of high reflection and the output optical fibre coupler of low reflection, then can on DC optical fiber, set up a main oscillating system and a power amplifying system respectively by two segmentation pitch of the laps.
Beneficial effect of the present invention is DC optical fiber pitch of the laps is coupled with the mm fiber of importing as pumping to form a plurality of cross sections, because the efficient of side coupling depends primarily on the cross section of DC optical fiber and mm fiber and contacts, result of the test shows that coupling efficiency reaches as high as 96%.The present invention not only makes coupling efficiency be improved, and makes DC optical fiber obtain pumping equably, has improved the conversion efficiency that pump light source produces to optical-fiber laser.Thereby solved fiber amplifier, the high power pumping light source coupled problem of optical-fiber laser is made high-power output, the fiber amplifier of high conversion efficiency and the needs of fiber laser to satisfy.Simple and effective, the characteristics little, easy to implement that take up space that the present invention also has.
Description of drawings
Fig. 1 is the optical fiber limit coupling process schematic diagram of U.S. Pat .5999673.
Fig. 2 is the optical fiber limit coupling process schematic diagram of international monopoly WO 00/67350.
Fig. 3 is the optical fiber limit coupling process schematic diagram of one embodiment of the invention.
Fig. 4, Fig. 5 are the optics contacting section schematic diagram of mm fiber and DC optical fiber among the embodiment.
Fig. 6 is the optical fiber limit coupling process schematic diagram of second embodiment of the invention.
Fig. 7, Fig. 8, Fig. 9 are third embodiment of the invention, are respectively the optics contacting section schematic diagram of three kinds of mm fibers and DC optical fiber, and wherein the cross section number of DC optical fiber is 3,4,7.
Figure 10 is the limit coupling process optics contacting section schematic diagram of a plurality of mm fibers and a plurality of DC optical fiber in the four embodiment of the invention.
Figure 11 is the optical fiber limit coupling process schematic diagram of fifth embodiment of the invention, and wherein DC optical fiber is a plurality of segmentation pitch of the laps, has separate double to pumping optical fiber on each branch pitch of the laps.
Figure 12 is the optical fiber limit coupling process schematic diagram of sixth embodiment of the invention, and wherein DC optical fiber still is two segmentation pitch of the laps, and pumping optical fiber is a single optical fiber, touches in that coupling regime and segmentation pitch of the laps DC optical fiber are molten, but has only two inputs.
Figure 13 is the optical fiber limit coupling process schematic diagram of seventh embodiment of the invention, and DC optical fiber is coupled near the direct pumping optical fiber with a drawing-down in two zones of two ends.
Figure 14 forms the diagram of optical fiber main oscillations level and amplifying stage for utilizing the embodiment of the invention six.
Embodiment
Fig. 3 has shown a kind of limit of the present invention coupling process, and DC optical fiber 10 removes protective layer at coupling regime 7, and mm fiber 6 is multimode fibers, removes protective layer and drawing-down gradually at coupling regime 7.DC optical fiber comprises that length is the pitch of the laps part of L1 and the remainder of length L 2, total length is L1+L2, therefore, at coupling regime 7, have the cross section of 3 optical fiber, shown in Fig. 4,5, the cross section of DC optical fiber can be (as Fig. 4) that optics contacts with each other, or do not contact (as Fig. 5) mutually, two cross sections of DC optical fiber and the pumping optical fiber cross section of drawing-down gradually are that optics contacts with each other, optics contacts with each other to refer to by molten and touches, or contacts with each other and make pump light source transfer to DC optical fiber from mm fiber termination 8 to get on.
Fig. 6 has shown the schematic diagram of another embodiment of the optical fiber limit coupling process of pump light source of the present invention, as different from Example 1, in embodiment 1, when mm fiber 6 and DC optical fiber 10 after coupling regime 7 reaches best optics and contact, only keep the input on the left side and input on the right of removing.Pump light source is introduced from the termination 8 of the mm fiber on the left side in the present embodiment, be switched on the DC optical fiber and by clockwise along the DC Optical Fiber Transmission at coupling regime 7, another pump light source is introduced from the termination 9 of the right mm fiber, be switched on the DC optical fiber and by transferring along DC optical fiber counterclockwise at coupling regime 7, form two directional pump, this coupling process can further improve the pumping efficiency of DC optical fiber.
Embodiment 3
Fig. 7,8,9 has shown realization the third embodiment of the present invention, and in embodiment 1 and embodiment 2, DC optical fiber is coiled 2 circles, and a drawing-down cross section of 2 cross sections and mm fiber is molten touches so have only.In the present embodiment, but 3 circles of DC optical fiber coiled, 4 circles, 7 circles etc. just form the cross section of a plurality of DC optical fiber and molten the touching in cross section of a mm fiber at coupling regime 7, obviously like this, the DC optical fiber of coiled multi-turn, the length of each circle can equate, also can be unequal, and the distribution of therefore being coupled to the pump energy of whole DC optical fiber can be controlled along DC optical fiber.In this embodiment owing to adopted the pitch of the laps of a plurality of DC optical fiber, so mm fiber can be drawing-down also can not drawing-down.
Embodiment 4
Figure 10 has shown the 4th embodiment of optical fiber of the present invention limit coupling process, and among above-mentioned three kinds of embodiment, pumping optical fiber is to be undertaken by a mm fiber, although DC optical fiber is pitch of the laps, also is to be undertaken by a DC optical fiber.In the present embodiment, mm fiber 6 can be many, and the DC optical fiber 10 of pitch of the laps can be many, and Figure 10 has provided the cross section of nine mm fibers and the cross section of 16 DC optical fiber; Many mm fibers can be identical simultaneously, also can be different mm fibers; Many DC optical fiber can be identical optical fiber, also can be different optical fiber.
Embodiment 5
Figure 11 has shown the 5th kind of embodiment of optical fiber of the present invention limit coupling process, by the optical fiber of pumping is to carry out the segmentation pitch of the laps by a DC optical fiber 10, its total length L=L1+L2+L3+L4, wherein L1 is the length of first pitch of the laps, L2 is the distance between first pitch of the laps and second pitch of the laps, and L3 is the length of second pitch of the laps, and L4 is remaining DC light length, the method of pumping optical fiber is coupled at the Coupling point of each DC optical fiber pitch of the laps and the mm fiber 6 of a two-way pumping as embodiment 2.Embodiment 6
Figure 12 is the 6th kind of embodiment of the present invention, DC optical fiber and embodiment 5 are the same to be that a DC optical fiber carries out the segmentation pitch of the laps, pumping optical fiber is to be undertaken by a mm fiber, at each coupling regime, the mm fiber 6 of segmentation drawing-down melts at coupling regime 7 with the DC optical fiber 10 of segmentation pitch of the laps and touches, but mm fiber is continuous, does not cut off, and has only the leading-in end of two terminations of mm fiber as pump light source.
Figure 13 is the 7th kind of embodiment of the present invention; by the optical fiber of pumping is a DC optical fiber 10; removing protective layer near near the two ends of this optical fiber; optics contacts with each other the back as coupling regime; pumping light is undertaken by a mm fiber 6, removes protective layer and touches with the DC optical fiber with two cross sections is molten after the drawing-down gradually.
Embodiment 8
Figure 14 is the embodiment of pump light source of the present invention limit coupling process in the application of fiber amplifier, this embodiment is the basis at embodiment 6, introduce the fiber grating of high reflection and the output coupler of low reflection and form master oscillator on the pitch of the laps of first DC optical fiber, second DC optical fiber pitch of the laps is as fiber amplifier.
Claims (11)
1. the optical fiber side coupling process of a pump light source; comprise that mm fiber is as the pumping input optical fibre; DC optical fiber is as the optical fiber that produces amplifier or laser; protective layer is removed in the zone that it is characterized in that the coupling of mm fiber and DC optical fiber; with the coupled section coiled circle of DC optical fiber, with the coupling regime of mm fiber, DC optical fiber is to remove protective layer; the coupling of DC optical fiber and mm fiber is that optics contacts, and the optics contact refers to melt mutually and touches or abut against together mutually.
2. by the optical fiber side coupling process of the described pump light source of claim 1, it is characterized in that and to remove the mm fiber drawing-down gradually of protective layer, make mm fiber have zone and a cross section that diminishes of drawing-down gradually at coupling regime.
3. by the optical fiber side coupling process of claim 1 or 2 described pump light sources, it is characterized in that DC optical fiber makes it be formed with a plurality of cross sections in coupled section around multi-turn and carries out optics with the mm fiber cross section and contact.
4. by the optical fiber side coupling process of claim 1 or 2 described pump light sources, it is characterized in that the molten zone of touching that is coupled at DC optical fiber and mm fiber, realize that the concrete grammar of optics contact is as follows: (1) removes the molten protective layer that touches the zone of mm fiber; (2) draw the awl machine molten zone of touching of drawing-down mm fiber gradually with optical fiber, the fibre diameter of drawing-down is by formula: fibre diameter * numerical aperture=constant decision; (3) DC optical fiber pitch of the laps, the number of turns of pitch of the laps is by using decision, in the molten zone of touching of every circle; remove the protective layer of every DC optical fiber; (4) touch the zone molten, the mm fiber of tussle DC optical fiber and drawing-down makes good optics contact between them, molten DC optical fiber and the mm fiber of touching of (5) high temperature.
5. by the optical fiber side coupling process of claim 1 or 2 described pump light sources, the core structure that it is characterized in that described DC optical fiber comprises single mode or other core structure.
6. press the optical fiber side coupling process of claim 1 or 2 described pump light sources, it is characterized in that described mm fiber has two inputs and is used to introduce pump light source, keep this two inputs, then light source is coupled in the DC optical fiber of pitch of the laps respectively along clockwise and transmission counterclockwise, forms two directional pump.
7. by the optical fiber side coupling process of claim 1 or 2 described pump light sources, it is characterized in that removing an input of mm fiber, only stay an input, form unidirectional pumping.
8. by the optical fiber side coupling process of claim 1 or 2 described pump light sources, it is characterized in that the DC optical fiber of coiled circle forms molten the touching in one or more cross sections of a plurality of cross sections and mm fiber around multi-turn.
9. by the optical fiber side coupling process of claim 1 or 2 described pump light sources, it is characterized in that mm fiber is single or many, simultaneously, DC optical fiber is single or many.
10. by the optical fiber side coupling process of claim 1 or 2 described pump light sources, it is characterized in that DC optical fiber is the segmentation pitch of the laps, then mm fiber by unidirectional pumping or two directional pump respectively independently with the DC optical fiber coupling of a plurality of pitch of the laps of segmentation.
11. optical fiber side coupling process by claim 1 or 2 described pump light sources, it is characterized in that by the optical fiber of pumping it being to carry out the segmentation pitch of the laps by a DC optical fiber, pumping optical fiber is to be undertaken by a mm fiber, at each coupling regime, the DC optical fiber of the mm fiber of segmentation drawing-down and segmentation pitch of the laps melts at coupling regime and touches, but mm fiber is continuous, does not cut off, and has only the leading-in end of two terminations of mm fiber as pump light source.
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| CN 03128067 CN1210590C (en) | 2003-05-30 | 2003-05-30 | Optical fibre lateral edge coupling method of pumping light source |
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| CN 03128067 CN1210590C (en) | 2003-05-30 | 2003-05-30 | Optical fibre lateral edge coupling method of pumping light source |
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| CN1210590C CN1210590C (en) | 2005-07-13 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102081195A (en) * | 2010-11-18 | 2011-06-01 | 杭州华威药业有限公司 | Device and method for coupling double cladding optical fiber laser |
| CN102298173A (en) * | 2011-08-29 | 2011-12-28 | 武汉安扬激光技术有限责任公司 | Lateral pumped fiber structure and manufacturing method thereof |
| CN102436036A (en) * | 2011-12-16 | 2012-05-02 | 烽火通信科技股份有限公司 | Optical fiber beam combiner and manufacturing method thereof |
| CN102687353A (en) * | 2010-10-07 | 2012-09-19 | Ipg光子公司 | High power neodymium fiber lasers and amplifiers |
| CN102946045A (en) * | 2012-11-30 | 2013-02-27 | 清华大学 | Fiber laser pump coupler |
| CN103050882A (en) * | 2012-12-07 | 2013-04-17 | 中国科学院西安光学精密机械研究所 | Solid laser beam amplifier using side pumping of optical fiber light guide and laser |
| CN103185919A (en) * | 2011-12-30 | 2013-07-03 | 清华大学 | Coupling device of multimode optical fibers with cladding |
| CN103545704A (en) * | 2013-10-31 | 2014-01-29 | 中国电子科技集团公司第四十六研究所 | Implantable side-pumping coupling method |
| CN109188602A (en) * | 2018-11-16 | 2019-01-11 | 中聚科技股份有限公司 | A kind of annular rare-earth doped optical fibre and the optical-fiber laser therapeutic device using it |
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2003
- 2003-05-30 CN CN 03128067 patent/CN1210590C/en not_active Expired - Lifetime
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102687353B (en) * | 2010-10-07 | 2015-02-11 | Ipg光子公司 | High power neodymium fiber lasers and amplifiers |
| CN102687353A (en) * | 2010-10-07 | 2012-09-19 | Ipg光子公司 | High power neodymium fiber lasers and amplifiers |
| CN102081195A (en) * | 2010-11-18 | 2011-06-01 | 杭州华威药业有限公司 | Device and method for coupling double cladding optical fiber laser |
| CN102298173A (en) * | 2011-08-29 | 2011-12-28 | 武汉安扬激光技术有限责任公司 | Lateral pumped fiber structure and manufacturing method thereof |
| CN102436036A (en) * | 2011-12-16 | 2012-05-02 | 烽火通信科技股份有限公司 | Optical fiber beam combiner and manufacturing method thereof |
| CN103185919A (en) * | 2011-12-30 | 2013-07-03 | 清华大学 | Coupling device of multimode optical fibers with cladding |
| CN103185919B (en) * | 2011-12-30 | 2015-06-17 | 清华大学 | Coupling device of multimode optical fibers with cladding |
| CN102946045A (en) * | 2012-11-30 | 2013-02-27 | 清华大学 | Fiber laser pump coupler |
| CN102946045B (en) * | 2012-11-30 | 2015-01-14 | 清华大学 | Fiber laser pump coupler |
| CN103050882A (en) * | 2012-12-07 | 2013-04-17 | 中国科学院西安光学精密机械研究所 | Solid laser beam amplifier using side pumping of optical fiber light guide and laser |
| CN103545704A (en) * | 2013-10-31 | 2014-01-29 | 中国电子科技集团公司第四十六研究所 | Implantable side-pumping coupling method |
| CN103545704B (en) * | 2013-10-31 | 2016-07-13 | 中国电子科技集团公司第四十六研究所 | Implanted profile pump coupling process |
| CN109188602A (en) * | 2018-11-16 | 2019-01-11 | 中聚科技股份有限公司 | A kind of annular rare-earth doped optical fibre and the optical-fiber laser therapeutic device using it |
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|---|---|
| CN1210590C (en) | 2005-07-13 |
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Address after: 430074 East Lake science and technology zone, Wuhan province high tech Avenue, No. 999, the future of science and technology city of the city of Hubei Patentee after: WUHAN RAYCUS FIBER LASER TECHNOLOGIES Co.,Ltd. Address before: 430223 Wuhan Industrial Development Zone, East Lake hi tech Zone, Wuhan, Hubei, China Patentee before: Wuhan sharp optical laser technology Co.,Ltd. |
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