CN201054460Y - Medium infrared high-power laser light source based on erbium-ytterbium co-doped double-clad fiber - Google Patents
Medium infrared high-power laser light source based on erbium-ytterbium co-doped double-clad fiber Download PDFInfo
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- CN201054460Y CN201054460Y CNU2007200714350U CN200720071435U CN201054460Y CN 201054460 Y CN201054460 Y CN 201054460Y CN U2007200714350 U CNU2007200714350 U CN U2007200714350U CN 200720071435 U CN200720071435 U CN 200720071435U CN 201054460 Y CN201054460 Y CN 201054460Y
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- double clad
- clad fiber
- erbium ytterbium
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- 239000000835 fiber Substances 0.000 title claims abstract description 134
- KWMNWMQPPKKDII-UHFFFAOYSA-N erbium ytterbium Chemical compound [Er].[Yb] KWMNWMQPPKKDII-UHFFFAOYSA-N 0.000 title claims abstract description 59
- 239000004065 semiconductor Substances 0.000 claims abstract description 27
- 239000013078 crystal Substances 0.000 claims abstract description 22
- 238000002310 reflectometry Methods 0.000 claims abstract description 7
- 238000005253 cladding Methods 0.000 claims description 11
- 239000013307 optical fiber Substances 0.000 claims description 11
- 238000003466 welding Methods 0.000 claims description 10
- 229910013641 LiNbO 3 Inorganic materials 0.000 claims description 7
- 230000003287 optical effect Effects 0.000 claims description 7
- 238000005520 cutting process Methods 0.000 claims description 5
- 241000931526 Acer campestre Species 0.000 claims description 4
- 238000003491 array Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 230000000295 complement effect Effects 0.000 claims description 2
- 229910003327 LiNbO3 Inorganic materials 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 7
- 230000005540 biological transmission Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 11
- 239000008710 crystal-8 Substances 0.000 description 7
- 230000003595 spectral effect Effects 0.000 description 4
- 229910052691 Erbium Inorganic materials 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 229910052769 Ytterbium Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- UYAHIZSMUZPPFV-UHFFFAOYSA-N erbium Chemical compound [Er] UYAHIZSMUZPPFV-UHFFFAOYSA-N 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- NAWDYIZEMPQZHO-UHFFFAOYSA-N ytterbium Chemical compound [Yb] NAWDYIZEMPQZHO-UHFFFAOYSA-N 0.000 description 1
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Abstract
An erbium ytterbium co-doped double-clad fiber-based mid-infrared high-power laser source comprises: the laser comprises a high-power semiconductor laser, and an energy transmission fiber, a first fiber grating, a second fiber grating, an erbium-ytterbium co-doped double-clad fiber, a collimating lens, a focusing lens, a nonlinear crystal and a collimating output lens which are sequentially arranged from the output end of the high-power semiconductor laser. The erbium ytterbium co-doped double-clad fiber is welded with a wavelength lambda near 1.06 mu m1And for a wavelength λ around 1.56 μm2The end faces of the other ends of the first fiber grating, the second fiber grating and the erbium ytterbium co-doped double-clad fiber with high reflectivity form a resonant cavity, so that the wavelength is lambda1And λ2The high-power laser is output and focused on the nonlinear crystal through the achromatic lens, the difference frequency is carried out in the nonlinear crystal, and the mid-infrared high-power laser is output through the collimation output lens. The utility model has the advantages of laser conversion efficiency is high, simple structure, small, light in weight, system stability are high.
Description
Technical field
The utility model relates to high power mid-infrared laser light source, and is particularly a kind of based on infrared high power laser sources in the erbium ytterbium co doped double clad fiber.
Background technology
In recent years, infraredly during the output wavelength of laser expands to be subjected to increasing concern, be not only because gas molecule in the absorption line strengths in middle infrared wavelength zone than the high several magnitudes of near infrared band, thereby the mid-infrared laser spectral technique has very important application prospect, also because are window wave bands of atmosphere at 3～5 mu m wavebands, at this wave band inner laser dense fog, flue dust had stronger penetration power, it is little to transmit the body molecular scattering of being bullied on the sea level, therefore is fit to be used in fields such as laser radar, electrooptical countermeasures.At present, the technology that obtains mid-infrared laser in this wave-length coverage mainly contains, and fluorine deuterate laser directly produces, and several different methods such as optical parametric oscillator (OPO) and difference frequency (DFG) generation obtain the laser in this wave-length coverage.The Energy distribution of chemical laser is in the spectral region of broad, but structure is huge, involves great expense; The optical parametric oscillator light energy output is low, and beam quality is relatively poor; And difference frequency has many good qualities with respect to optical parametric oscillator and chemical laser, as tunable range flexibly, full consolidated structures compactness, output energy be high.
Adopt difference frequency to produce in the technology formerly of mid-infrared laser, need the Nd:YAG laser of two different output wavelengths, to produce the mid-infrared laser of 4 mu m wavebands.Referring to technology [optics and photoelectric technology .3:26-28,2005] formerly, solid Nd: the efficient of YAG laser is relatively low, and laser beam quality is low during the high power running, causes the difference frequency conversion efficiency low; In addition, owing to adopted two lasers, the cost height of system, stability is not high.Formerly in the technology, use erbium-ytterbium co-doped fiber as laser medium, obtain the laser of 1.5 mum wavelengths by the laser generation of taking to suppress 1.06 μ m, the spectral bandwidth of output laser is bigger.Referring to technology [OPTICSEXPRESS.14:3936-3941,2006] formerly, in this technology,, can not realize the full fiberize of laser owing to adopt plated film chamber sheet to constitute resonant cavity, it is applied and is subjected to certain limitation.
Summary of the invention
The technical problems to be solved in the utility model is to overcome the deficiency of above-mentioned technology formerly, provide a kind of based on infrared high power laser sources in the erbium ytterbium co doped double clad fiber, to improve the conversion efficiency and the output stability of LASER Light Source, obtain the mid-infrared laser output of high power, high light beam quality, the implementation structure fiberize is beneficial to the miniaturization of LASER Light Source.
Basic thought of the present utility model is: adopt high-power semiconductor laser pumping welding that the erbium ytterbium co doped double clad fiber of two fiber gratings is arranged, output when having realized near near the dual-wavelength laser that 1.06 μ m are and 1.56 μ m are, utilize nonlinear crystal to realize the difference frequency of two wavelength lasers then, obtain high-power mid-infrared laser output.
Technical solution of the present utility model is as follows:
A kind of based on infrared high power laser sources in the erbium ytterbium co doped double clad fiber, its formation comprises: high-power semiconductor laser and certainly the output of this high-power semiconductor laser set gradually: energy-transmission optic fibre, first fiber grating, second fiber grating, erbium ytterbium co doped double clad fiber, collimating lens, condenser lens, nonlinear crystal and collimation output lens, the output of described erbium ytterbium co doped double clad fiber is positioned at the front focus of described collimating lens, the front focus of the back focus of described condenser lens and collimation output lens is confocal, this focus is positioned among the described nonlinear crystal, the pump light that described high-power semiconductor laser sends is coupled to erbium ytterbium co doped double clad fiber by energy-transmission optic fibre, between described energy-transmission optic fibre and erbium ytterbium co doped double clad fiber, welding has respectively to central wavelength lambda
1And central wavelength lambda
2High anti-first fiber grating and second fiber grating are made the λ of erbium ytterbium co doped double clad fiber laser respectively
1And λ
2The resonator mirror of optical maser wavelength, the other end vertical axis cutting of erbium ytterbium co doped double clad fiber is as the outgoing mirror of resonant cavity.
The fibre core of described erbium ytterbium co doped double clad fiber is circular, and diameter is 20 μ m, and the fibre core numerical aperture is 0.07; Its inner cladding is hexagon or octangle, and diameter is 200 μ m or 400 μ m, and the inner cladding numerical aperture is 0.46.
Described first fiber grating is a central wavelength lambda
1=1.06 μ m have the doubly clad optical fiber grating of high reflectance, and its fiber grating only is scribed at the circular core zone, and reflectivity is greater than 90%; The diameter of its fibre core and inner cladding is identical with the relevant parameter of described erbium ytterbium co doped double clad fiber with numerical aperture.
Described second fiber grating is a central wavelength lambda
2=1.56 μ m have the doubly clad optical fiber grating of high reflectance, and its fiber grating only is scribed at the circular core zone, and reflectivity is greater than 90%; The diameter of its fibre core and inner cladding is identical with the parameter of described erbium ytterbium co doped double clad fiber with numerical aperture.
The centre wavelength of described high-power semiconductor laser is complementary with the absorbing wavelength of erbium ytterbium co doped double clad fiber, be 975nm or 915nm, described high-power semiconductor laser is the combination of a plurality of semiconductor laser arraies or the combination of a plurality of single tube semiconductor lasers
Described collimating lens be by a spherical lens group constitute to wavelength X
1And λ
2Achromatic collimating lens, its each face all is coated with the anti-reflection film of these two wavelength, realizes the high efficiency collimation output of two wavelength lasers.
Described condenser lens be by a spherical lens group constitute to wavelength X
1And λ
2Achromatic condenser lens, or the achromatic lens that constitutes by non-spherical lens, and its each face all is coated with the anti-reflection film of these two wavelength.The dual-wavelength laser that erbium ytterbium co doped double clad fiber is produced more effectively focuses in the nonlinear crystal, realizes difference frequency conversion efficiently.
Described nonlinear crystal is LiNbO
3Crystal, MgO:LiNbO
3Crystal or other nonlinear crystal.Described nonlinear crystal has higher laser damage threshold and big non linear coefficient, it can realize phase matched by adjusting the control of angle or temperature in 1 μ m～4 mum wavelength scopes, by its difference frequency conversion, obtain high efficiency, the output of high-power mid-infrared laser to wavelength X 1 and λ 2.
Technique effect of the present utility model:
The utility model adopts high-power semiconductor laser pumping welding that the erbium ytterbium co doped double clad fiber of two fiber gratings is arranged, realized that the high power of the dual-wavelength laser of 1.06 μ m and 1.56 μ m, the laser of high light beam quality exports simultaneously, and technology formerly, obtain the laser output of two wavelength, must adopt two lasers, thereby, the utlity model has the advantage that system configuration is simple, efficient is high, and can reduce system cost greatly.
The utility model adopts two fiber gratings respectively as the resonator mirror of two different wave length laser, output when realizing two wavelength lasers, the employing of fiber grating makes dual wavelength fibre laser realize full fiberize, and help the output of narrow spectral line laser, improve the nonlinear difference conversion efficiency.
In the utility model, adopt LiNbO
3Crystal or MgO:LiNbO
3Crystal carries out difference frequency to two wavelength lasers of high light beam quality, can realize the high-power mid-infrared laser output of wavelength about 3.3 μ m.
Description of drawings
Fig. 1 is the structural representation based on infrared high power laser sources in the erbium ytterbium co doped double clad fiber of the present utility model.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further described.
See also Fig. 1 earlier, Fig. 1 is the structural representation of the utility model based on infrared high power laser sources in the erbium ytterbium co doped double clad fiber.As seen from the figure, the utility model based on the formation of infrared high power laser sources in the erbium ytterbium co doped double clad fiber comprise high-power semiconductor laser 1 and certainly the output of this high-power semiconductor laser 1 set gradually: energy-transmission optic fibre 2, first fiber grating 3, second fiber grating 4, erbium ytterbium co doped double clad fiber 5, collimating lens 6, condenser lens 7, nonlinear crystal 8 and collimation output lens 9, the output 10 of described erbium ytterbium co doped double clad fiber 5 is positioned at the front focus of described collimating lens 6, the front focus of the back focus of described condenser lens 7 and collimation output lens 9 is confocal, this focus is positioned among the described nonlinear crystal 8, the pump light that described high-power semiconductor laser 1 sends is coupled to erbium ytterbium co doped double clad fiber 5 by energy-transmission optic fibre 2, between described energy-transmission optic fibre 2 and erbium ytterbium co doped double clad fiber 5, welding has respectively to central wavelength lambda
1And central wavelength lambda
2High anti-first fiber grating 3 and second fiber grating 4 are made the λ of erbium ytterbium co doped double clad fiber laser respectively
1And λ
2The resonator mirror of optical maser wavelength, the other end 10 vertical axis cutting of erbium ytterbium co doped double clad fiber 5 is as the outgoing mirror of resonant cavity.
The pump light that described high-power semiconductor laser 1 sends is coupled to erbium ytterbium co doped double clad fiber 5 by energy-transmission optic fibre 2, the population inversion of erbium ytterbium co doped double clad fiber fibre core is provided, between energy-transmission optic fibre 2 and erbium ytterbium co doped double clad fiber 5, welding has respectively to wavelength X
1And λ
2First fiber grating and 4 with high reflectance is respectively as λ
1And λ
2The resonator mirror of optical maser wavelength, λ
1Near 1.06 μ m, λ
2Near 1.56 μ m, the cutting of the other end vertical axis of optical fiber is as the outgoing mirror 10 of laser; From the wavelength of perpendicular cuts fiber end face 10 outputs is λ
1And λ
2Laser by behind the collimating lens collimation, by the difference frequency effect, the generation wavelength is (λ to the laser that focuses on 8, two wavelength of nonlinear crystal jointly by condenser lens in nonlinear crystal 8 again
1* λ
2)/(λ
2-λ
1) mid-infrared laser, and by the output of collimation output lens realization collimation.
Be the physical parameter of a specific embodiment of the utility model below:
As shown in Figure 1, the centre wavelength of described high-power semiconductor laser 1 is at 975nm, and behind beam shaping, by energy-transmission optic fibre 2 coupling outputs, the output laser power reaches 300W by a plurality of semiconductor laser arrays for it.The core diameter of energy-transmission optic fibre 2 is 400 μ m, and numerical aperture is 0.44.Energy-transmission optic fibre 2 and the 3 direct weldings of first fiber grating, the central wavelength lambda of first fiber grating 3
1=1064nm, reflectivity are 97%, are the doubly clad optical fiber grating, and grating only is scribed at core region, and core diameter is 20 μ m, and numerical aperture is 0.06, and the horizontal interface of inner cladding is circular, diameter 400 μ m, and numerical aperture is 0.46.The other end of first fiber grating 3 and 4 weldings of second fiber grating, the central wavelength lambda of second fiber grating 4
2=1565nm, reflectivity are that 97%, the second fiber grating 4 also is the doubly clad optical fiber grating, and its inner cladding is identical with the parameter of first fiber grating 3 with core parameters.The other end of second fiber grating 4 and erbium ytterbium co doped double clad fiber 5 weldings.
Erbium ytterbium co doped double clad fiber 5 is the doubly clad optical fiber of big mode field area, and erbium ion and ytterbium ion mix jointly according to certain ratio in the fibre core, Yb
3+Concentration be 1wt%, Er
3+Concentration be 0.125wt%.Doped core is circular, and diameter is 20 μ m, and numerical aperture is about 0.06, and inner cladding is shaped as octangle, diameter 400 μ m, and numerical aperture is about 0.46; One end and fiber grating 4 weldings, the direct vertical fiber axis cutting of the other end is as the output 10 of laser.The small-signal of 5 couples of 975nm of erbium ytterbium co doped double clad fiber absorbs and is about 2dB/m, and the length of optical fiber is 6.5m.The pump light of the 975nm that high-power semiconductor laser 1 sends is through energy-transmission optic fibre 2, first fiber grating 3 and second fiber grating 4 are coupled in the erbium ytterbium co doped double clad fiber 5 expeditiously, for the population inversion in the doped core provides energy, second fiber grating 4 and fiber end face 10 constitute λ
2The a pair of laserresonator of=1565nm, first fiber grating 3 and fiber end face 10 constitute λ
1Another right laserresonator of=1064nm, thereby can realize 1064nm and two wavelength lasers of 1565nm time running.
From the dual-wavelength laser of fiber end face 10 output by compound collimating lens 6 collimations of the achromatism of focal distance f=8mm after, achromatism complex focusing lens 7 by focal distance f=40mm focus on nonlinear crystal 8 again, and each face of collimating lens 6 and condenser lens 7 all plates wavelength X
1And λ
2Anti-reflection film.Nonlinear crystal 8 is LiNbO
3, its non linear coefficient d
Eff=0.88 * 10
-8Esu, corresponding crystal-cut angle is θ=48.5 °,
The length of nonlinear crystal 8 is 12mm.Inject the wavelength X of nonlinear crystal 8
1The laser of=1064nm and wavelength X
2The laser of=1565nm is at LiNbO
3In carry out difference frequency, be the mid-infrared laser of (λ 1 * λ 2)/(λ 2-λ 1)=3.3 μ m thereby obtain wavelength, collimation output lens 9 is 40mm for the focal length of 3.3 mum wavelengths, realization is to the collimation of mid-infrared laser.The mid-infrared laser light source based on erbium ytterbium co doped double clad fiber of present embodiment when the power output of high-power semiconductor laser is 300W, can realize that wavelength is the high power of the nearly 20W of 3.3 μ m, the mid-infrared laser output of high light beam quality.
In sum, the utility model swashs based on infrared high power in the erbium ytterbium co doped double clad fiber Radiant, the fiber grating that adopts two high reflectances respectively as near the wavelength 1.06 μ m and 1.56 the resonator mirror of wavelength adopts a high-power semiconductor laser as pumping near the μ m Source, the doubly clad optical fiber of one section erbium and ytterbium codoping be as gain medium, from a full fiberize Realized the high power laser light output of two wavelength in the optical fiber laser; Two ripples of high light beam quality Long laser carries out difference frequency by nonlinear crystal, with red in acquisition high power, the high light beam quality Outer Laser output. Compare with technology formerly, the utlity model has simple in structure, good stability, The characteristics that conversion efficiency is high, and it is defeated to obtain the mid-infrared laser of high power, high light beam quality Go out.
Claims (8)
1. one kind based on infrared high power laser sources in the erbium ytterbium co doped double clad fiber, be characterised in that its formation comprise high-power semiconductor laser (1) and certainly the output of this high-power semiconductor laser (1) set gradually: energy-transmission optic fibre (2), first fiber grating (3), second fiber grating (4), erbium ytterbium co doped double clad fiber (5), collimating lens (6), condenser lens (7), nonlinear crystal (8) and collimation output lens (9), the output (10) of described erbium ytterbium co doped double clad fiber (5) is positioned at the front focus of described collimating lens (6), the front focus of the back focus of described condenser lens (7) and collimation output lens (9) is confocal, this focus is positioned among the described nonlinear crystal (8), the pump light that described high-power semiconductor laser (1) sends is coupled to erbium ytterbium co doped double clad fiber (5) by energy-transmission optic fibre (2), between described energy-transmission optic fibre (2) and erbium ytterbium co doped double clad fiber (5), welding has respectively to central wavelength lambda
1And central wavelength lambda
2High anti-first fiber grating (3) and second fiber grating (4) are made the λ of erbium ytterbium co doped double clad fiber laser respectively
1And λ
2The resonator mirror of optical maser wavelength, the other end (10) the vertical axis cutting of erbium ytterbium co doped double clad fiber (5) is as the outgoing mirror of resonant cavity.
2. according to claim 1 based on infrared high power laser sources in the erbium ytterbium co doped double clad fiber, the fibre core that it is characterized in that described erbium ytterbium co doped double clad fiber (5) is for circular, and diameter is 20 μ m, and the fibre core numerical aperture is 0.07; Its inner cladding is hexagon or octangle, and diameter is 200 μ m or 400 μ m, and the inner cladding numerical aperture is 0.46.
3. according to claim 1 based on infrared high power laser sources in the erbium ytterbium co doped double clad fiber, it is characterized in that described first fiber grating (3) is a central wavelength lambda
1=1.06 μ m have the doubly clad optical fiber grating of high reflectance, and its fiber grating only is scribed at the circular core zone, and reflectivity is greater than 90%; The diameter of its fibre core and inner cladding is identical with the relevant parameter of described erbium ytterbium co doped double clad fiber (5) with numerical aperture.
4. according to claim 1 based on infrared high power laser sources in the erbium ytterbium co doped double clad fiber, it is characterized in that described second fiber grating (4) is a central wavelength lambda
2=1.56 μ m have the doubly clad optical fiber grating of high reflectance, and its fiber grating only is scribed at the circular core zone, and reflectivity is greater than 90%; The diameter of its fibre core and inner cladding is identical with the relevant parameter of described erbium ytterbium co doped double clad fiber (5) with numerical aperture.
5. according to claim 1 based on infrared high power laser sources in the erbium ytterbium co doped double clad fiber, the absorbing wavelength that it is characterized in that the same erbium ytterbium co doped double clad fiber of centre wavelength (7) of described high-power semiconductor laser (1) is complementary, be 975nm or 915nm, described high-power semiconductor laser (1) is the combination of a plurality of semiconductor laser arraies or the combination of a plurality of single tube semiconductor lasers.
6. according to claim 1 based on infrared high power laser sources in the erbium ytterbium co doped double clad fiber, it is characterized in that described collimating lens (6) be by a spherical lens group constitute to wavelength X
1And λ
2Achromatic collimating lens, its each face all plates the anti-reflection film of two wavelength, realizes the high efficiency collimation output of two wavelength lasers.
7. according to claim 1 based on infrared high power laser sources in the erbium ytterbium co doped double clad fiber, it is characterized in that described condenser lens (7) be by a spherical lens group constitute to wavelength X
1And λ
2Achromatic condenser lens, or the achromatic lens that constitutes by non-spherical lens, and its each face is all plated the anti-reflection film of two wavelength.
8. according to claim 1 based on infrared high power laser sources in the erbium ytterbium co doped double clad fiber, it is characterized in that described nonlinear crystal (8) is LiNbO3 crystal, MgO:LiNbO
3Crystal or other nonlinear crystal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200714350U CN201054460Y (en) | 2007-06-22 | 2007-06-22 | Medium infrared high-power laser light source based on erbium-ytterbium co-doped double-clad fiber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200714350U CN201054460Y (en) | 2007-06-22 | 2007-06-22 | Medium infrared high-power laser light source based on erbium-ytterbium co-doped double-clad fiber |
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|---|---|
| CN201054460Y true CN201054460Y (en) | 2008-04-30 |
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|---|---|---|---|
| CNU2007200714350U Expired - Lifetime CN201054460Y (en) | 2007-06-22 | 2007-06-22 | Medium infrared high-power laser light source based on erbium-ytterbium co-doped double-clad fiber |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100452572C (en) * | 2007-06-22 | 2009-01-14 | 中国科学院上海光学精密机械研究所 | Medium infrared high-power laser light source based on erbium-ytterbium co-doped double-clad fiber |
| CN106356702A (en) * | 2015-07-17 | 2017-01-25 | 高值光电股份有限公司 | Ultrashort pulse fiber amplifier using rare-earth doped gain fibers |
-
2007
- 2007-06-22 CN CNU2007200714350U patent/CN201054460Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100452572C (en) * | 2007-06-22 | 2009-01-14 | 中国科学院上海光学精密机械研究所 | Medium infrared high-power laser light source based on erbium-ytterbium co-doped double-clad fiber |
| CN106356702A (en) * | 2015-07-17 | 2017-01-25 | 高值光电股份有限公司 | Ultrashort pulse fiber amplifier using rare-earth doped gain fibers |
| CN106356702B (en) * | 2015-07-17 | 2020-01-21 | 高值光电股份有限公司 | Ultrashort pulse optical fiber amplifier |
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|---|---|---|---|
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| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20070622 |
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| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20070622 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |