CN2899204Y - Dual-wavelength pulse fiber laser system - Google Patents
Dual-wavelength pulse fiber laser system Download PDFInfo
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- CN2899204Y CN2899204Y CN 200620041589 CN200620041589U CN2899204Y CN 2899204 Y CN2899204 Y CN 2899204Y CN 200620041589 CN200620041589 CN 200620041589 CN 200620041589 U CN200620041589 U CN 200620041589U CN 2899204 Y CN2899204 Y CN 2899204Y
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- Prior art keywords
- optical fiber
- seed light
- light source
- fiber
- double
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- 239000000835 fiber Substances 0.000 title claims abstract description 37
- 239000013307 optical fiber Substances 0.000 claims abstract description 74
- 238000005086 pumping Methods 0.000 claims abstract description 24
- 230000003287 optical effect Effects 0.000 claims abstract description 22
- 230000009977 dual effect Effects 0.000 claims abstract description 18
- 238000005253 cladding Methods 0.000 claims abstract description 10
- 230000008878 coupling Effects 0.000 claims abstract description 10
- 238000010168 coupling process Methods 0.000 claims abstract description 10
- 238000005859 coupling reaction Methods 0.000 claims abstract description 10
- 239000011162 core material Substances 0.000 claims description 18
- 229910052769 Ytterbium Inorganic materials 0.000 claims description 12
- NAWDYIZEMPQZHO-UHFFFAOYSA-N ytterbium Chemical compound [Yb] NAWDYIZEMPQZHO-UHFFFAOYSA-N 0.000 claims description 12
- 229910052691 Erbium Inorganic materials 0.000 claims description 11
- UYAHIZSMUZPPFV-UHFFFAOYSA-N erbium Chemical compound [Er] UYAHIZSMUZPPFV-UHFFFAOYSA-N 0.000 claims description 11
- 238000003466 welding Methods 0.000 claims description 7
- 238000009738 saturating Methods 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 230000000295 complement effect Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000005498 polishing Methods 0.000 claims description 3
- KWMNWMQPPKKDII-UHFFFAOYSA-N erbium ytterbium Chemical compound [Er].[Yb] KWMNWMQPPKKDII-UHFFFAOYSA-N 0.000 abstract 1
- 239000012510 hollow fiber Substances 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000010183 spectrum analysis Methods 0.000 description 1
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Abstract
A dual-wavelength pulse optical fiber laser system is characterized by comprising a section of erbium-ytterbium co-doped double-clad optical fiber with a large mode area, a fiber cap of a hollow fiber which is ground and polished to a certain angle is welded on the output end face of the double-clad optical fiber, a pumping light source which consists of a plurality of laser diodes with tail fiber output is coupled into the inner cladding of the input end of the double-clad optical fiber through a pumping coupler, seed light emitted by a first seed light source and a second seed light source which are vertically arranged is combined into a beam through a 45-degree double-color plate, the beam is coupled into a fiber core of the input end of the double-clad optical fiber through an optical coupling system, and a first optical isolator and a second optical isolator which have corresponding wavelengths are respectively arranged between the first seed light source and the 45-degree double-color plate and between the second seed light source and the 45-degree double-color plate. The utility model has the characteristics of the system is stable, compact structure, pumping are efficient, can obtain high energy, the good dual wavelength pulse laser output of light beam quality.
Description
Technical field
The utility model relates to fiber laser, particularly a kind of dual wavelength pulse optical fiber laser system.
Background technology
Multi-wavelength optical fiber laser has crucial effect in Fibre Optical Sensor, spectrum analysis and dense wave division multipurpose optical fiber telecommunications system.Formerly in the technology, adopt seed pulse main oscillations amplifying technique, gain media is the long-pending doubly clad optical fiber of the big die face of erbium and ytterbium codoping, amplifies through two-stage, and the bait ytterbium co-doped fiber amplifier of cladding pumping has been realized the single-frequency amplifying laser output of the 87W at 1563nm wavelength place.Referring to technology [Electron.Lett.39:1717-1719,2003] formerly, but light path is complicated, and the stability of whole system is not high, implements difficulty.Improve the power output of pulse optical fiber or amplifier, key be how efficiently to be coupled pumping light and improve draw power.Formerly in the technology, pulse optical fiber or amplifier are to make pump light enter the two ends of optical fiber by focusing, by using double color plate to realize that pump light and seed light enter doubly clad optical fiber, referring to technology [Electron.Lett.35:1158-1160,1999] formerly.Because an optical fiber has only two end faces, enter inner cladding than the large-power semiconductor pumping laser from end face, cause the fire damage of end face easily, this has just limited the increase of the pumping light power that enters inner cladding, thereby has limited the further raising of fiber laser power output.Enter when utilizing double color plate to realize pump light and seed light, referring to technology [CLEO2002,591-592] formerly, have high requirements to realizing the high anti-and saturating double color plate of pump light height of seed light, and must realize simultaneously that seed light enters fibre core and pump light enters inner cladding, technical difficulty is bigger.
Summary of the invention
The technical problems to be solved in the utility model is to overcome the deficiency of technology formerly, a kind of dual wavelength pulse optical fiber laser system is provided, with stability, compactedness and the power output that improves this system, to obtain the double-wavelength pulse laser output of high-energy, good beam quality.
Concrete technical solution of the present utility model is as follows:
A kind of dual wavelength pulse optical fiber laser system, it is characterized in that comprising the doubly clad optical fiber that one section big die face of erbium and ytterbium codoping is long-pending, " the optical fiber cap " of the hollow-core fiber that one section grinding and polishing of this doubly clad optical fiber output end face welding is angled, the pump light source of forming by the laser diode of the fine output of a plurality of magnetic tape trailers, this pump light source is coupled into pump light by pumping coupler the inner cladding of described doubly clad optical fiber input, the seed light that two vertical first seed light sources of placing and second seed light source send synthesizes a branch of through 45 ° of double color plates, be coupled into the fibre core of described doubly clad optical fiber input by an optical coupling system, respectively between described first seed light source and described 45 ° of double color plates, respectively place first optical isolator and second optical isolator of a corresponding wavelength between second seed light source and the 45 ° of double color plates.
Core diameter＞10 μ the m of the long-pending doubly clad optical fiber of the big die face of described erbium and ytterbium codoping, numerical aperture is 0.05～0.06.
Described first seed light source is the Nd:YAG laser of accent Q, or pulse optical fiber.Q's mix the bait pulse optical fiber to described second seed light source in order to transfer.
Described pump light source is made up of the laser diode of the fine output of a plurality of magnetic tape trailers, and the absorbing wavelength of its wavelength and doubly clad optical fiber core material is complementary.
Described pumping coupler by many independently multimode fiber and 1 monomode fiber form, wherein many independently multimode fiber be used for the tail optical fiber welding with a plurality of laser diodes as pumping optical fiber, described monomode fiber is used for the injection of seed light.
Described optical coupling system is the achromatic coupled system that is made of the spherical lens group, or the achromatic coupled system that constitutes by non-spherical lens, realization focuses on to first seed light and second seed light time, and these two wavelength are all plated anti-reflection film.
Described 45 ° of double color plates are that the seed light that first seed light source is sent is high saturating, and the seed light that second seed light source is sent is high anti-and be the double color plate of 45 ° of placements with the seed light beam that described seed light source sends.
Technique effect of the present utility model:
The utility model adopts the gain media of seed optical pulse to adopt the long-pending doubly clad optical fiber of the big die face of erbium and ytterbium codoping, only needs single-stage to amplify, and just can realize the double-wavelength pulse laser output of the nearly hectowatt of average power, good beam quality.
The utility model adopts a plurality of laser diode LDs, by pumping coupler to system's pumping that is coupled, optical element greatly reduces, and has broken through the restriction of traditional end face coupling pump mode to pumping light power, thereby can further improve the power output of pulse optical fiber laser system.
In addition, adopt a plurality of laser diodes to make pumping source, therefore single laser diode need not semiconductor refrigerating, only needs simple air-cooled getting final product, therefore be easy to realize complete machineization, can be made into the pulse optical fiber laser system that volume is little, in light weight, compact conformation is firm, stability is good.
Pump light in the utility model is through pumping coupler, inject the inner cladding of the long-pending doubly clad optical fiber of the big die face of erbium and ytterbium codoping, the seed light that the seed source pulse laser of vertical two different wave lengths placing sends focuses on through optical coupling system, inject the fibre core of doubly clad optical fiber, need not priority of use technology [CLEO2002,591-592] in double color plate, technical being easier to realized.
Below in conjunction with accompanying drawing and embodiment the utility model is further described.
Description of drawings
Fig. 1 is the structural representation of dual wavelength pulse optical fiber laser system of the present utility model.
Embodiment
See also Fig. 1 earlier, Fig. 1 is the structural representation of the utility model dual wavelength pulse optical fiber laser system.As seen from the figure, the utility model dual wavelength pulse optical fiber laser system, its formation comprises the doubly clad optical fiber 9 that one section big die face of erbium and ytterbium codoping is long-pending, " the optical fiber cap 10 " of the hollow-core fiber that one section grinding and polishing of these doubly clad optical fiber 9 output end face weldings is angled, the pump light source of forming by the laser diode of the fine output of a plurality of magnetic tape trailers 7, this pump light source 7 is coupled into pump light by pumping coupler 8 inner cladding of described doubly clad optical fiber 9 inputs, the seed light that two vertical first seed light sources of placing 1 and second seed light source 4 send synthesizes a branch of through 45 ° of double color plates 5, be coupled into the fibre core of described doubly clad optical fiber 9 inputs by an optical coupling system 6, between described first seed light source 1 and described 45 ° of double color plates 5, place first optical isolator 2 and second optical isolator 3 of a corresponding wavelength between second seed light source 4 and the 45 ° of double color plates 5 respectively.
Core diameter＞10 μ the m of the long-pending doubly clad optical fiber 9 of the big die face of said erbium and ytterbium codoping, numerical aperture is 0.05～0.06.
Described first seed light source 1 is the Nd:YAG laser of accent Q, or pulse optical fiber.
Q's mix the bait pulse optical fiber to described second seed light source 4 in order to transfer.
Described pump light source 7 is made up of the laser diode of the fine output of a plurality of magnetic tape trailers, and the absorbing wavelength of its wavelength and doubly clad optical fiber 9 core materials is complementary.
Described pumping coupler 8 by many independently multimode fiber and 1 monomode fiber form, wherein many independently multimode fiber be used for the tail optical fiber welding with a plurality of laser diodes as pumping optical fiber, described monomode fiber is used for the injection of seed light.
Described optical coupling system 6 is the achromatic coupled systems that are made of the spherical lens group, or the achromatic coupled system that constitutes by non-spherical lens, realization focuses on to first seed light and second seed light time, and these two wavelength are all plated anti-reflection film.
Described 45 ° of double color plates 5 are that the seed light that first seed light source 1 is sent is high saturating, and the seed light that second seed light source 4 is sent is high anti-and be the double color plate of 45 ° of placements with the seed light beam that described seed light source sends.
In the present embodiment, also have lens 11 always in optical fiber cap 10 backs of the hollow-core fiber of doubly clad optical fiber 9 outputs, to obtain directional light output.
Its course of work is as follows: first seed light source pulse laser 1 of vertical two different wave lengths placing and the seed light that the second seed light source pulse laser 4 sends synthesize a branch of through 45 ° of double color plates 5, are coupled into the fibre core of amplifying fiber 9 by optical coupling system 6.Wherein in order to guarantee that the unidirectional of flashlight passes through; the protection seed light source is respectively placed first optical isolator 2 and second optical isolator 3 of a corresponding wavelength respectively between the first seed light source pulse laser 1, the second seed light source pulse laser 4 and 45 ° of double color plates 5.At last, amplifying laser is collimated by collimating lens 11.Adopt this system, just can obtain the double-wavelength pulse output of high-average power.
The physical parameter of enumerating a specific embodiment is as follows:
As shown in Figure 1, described first seed light source 1 is the Nd:YAG micro-slice laser of accent Q, wavelength 1064nm, and repetition rate 10～100kHz, average power can reach 1W.Second seed light source 4 is mixed the bait pulse optical fiber for what transfer Q, wavelength 1540nm, and repetition rate 10～100kHz, average power can reach 1W.Seed light that the first seed light source pulse laser 1 of 5 couples of 1064nm of 45 ° of double color plates sends is high saturating, and is high anti-to the seed light that the second seed light source pulse laser 4 of 1540nm sends.Pump light source 7 is made up of the multimode laser diode that 6 centre wavelengths are positioned at the magnetic tape trailer fibre (200 μ m/0.22) of 975nm, and the power output of single laser diode is 25W～30W, and total peak power output is 150～180W.Pumping coupler 8 by 6 independently multimode fiber and 1 monomode fiber form, the numerical aperture of multimode fiber is 0.22.6 root multimode fibers are used for the tail optical fiber welding with 6 laser diodes, and 1 monomode fiber is used for the injection of seed light.The core material of the long-pending doubly clad optical fiber 9 of the big die face of erbium and ytterbium codoping is doping Er
3+Ion and Yb
3+The quartz glass of ion, the small-signal at 975nm wavelength place is absorbed as～2.5dB/m.Long-pending doubly clad optical fiber 9 length of the big die face of erbium and ytterbium codoping are 4m, core diameter 24 μ m, and numerical aperture 0.20, inner cladding is D shape (400 μ m/360 μ m), numerical aperture 0.48.The high-average power dual wavelength pulse optical fiber laser system of present embodiment can obtain the double-wavelength pulse laser output of high-energy, good beam quality, and average power can reach nearly hectowatt.
In sum, the utility model dual wavelength pulse optical fiber laser system is compared with technology formerly, has compact conformation, pumping is even, pumping efficiency is higher characteristics, can obtain the double-wavelength pulse laser output of high-energy, good beam quality.
Claims (8)
1, a kind of dual wavelength pulse optical fiber laser system, it is characterized in that comprising the doubly clad optical fiber (9) that one section big die face of erbium and ytterbium codoping is long-pending, the optical fiber cap (10) of the hollow-core fiber that one section grinding and polishing of this doubly clad optical fiber (9) output end face welding is angled, the pump light source of forming by the laser diode of the fine output of a plurality of magnetic tape trailers (7), this pump light source (7) is coupled into pump light by pumping coupler (8) inner cladding of described doubly clad optical fiber (9) input, the seed light that two vertical first seed light sources of placing (1) and second seed light source (4) send synthesizes a branch of through 45 ° of double color plates (5), be coupled into the fibre core of described doubly clad optical fiber (9) input by an optical coupling system (6), respectively between described first seed light source (1) and described 45 ° of double color plates (5), respectively place first optical isolator (2) and second optical isolator (3) of a corresponding wavelength between second seed light source (4) and the 45 ° of double color plates (5).
2, dual wavelength pulse optical fiber laser system according to claim 1 is characterized in that the core diameter＞10 μ m of the long-pending doubly clad optical fiber (9) of the big die face of said erbium and ytterbium codoping, and numerical aperture is 0.05～0.06.
3, dual wavelength pulse optical fiber laser system according to claim 1 is characterized in that the Nd:YAG laser of described first seed light source (1) for accent Q, or pulse optical fiber.
4, dual wavelength pulse optical fiber laser system according to claim 1 is characterized in that Q's mix the bait pulse optical fiber to described second seed light source (4) in order to transfer.
5, dual wavelength pulse optical fiber laser system according to claim 1 is characterized in that described pump light source (7) is made up of the laser diode of the fine output of a plurality of magnetic tape trailers, and the absorbing wavelength of its wavelength and doubly clad optical fiber (9) core material is complementary.
6, dual wavelength pulse optical fiber laser system according to claim 1, it is characterized in that independently form by multimode fiber and 1 monomode fiber by many for described pumping coupler (8), wherein many independently multimode fiber as pumping optical fiber, be used for the tail optical fiber welding with a plurality of laser diodes, described monomode fiber is used for the injection of seed light.
7, dual wavelength pulse optical fiber laser system according to claim 1, it is characterized in that described optical coupling system (6) is the achromatic coupled system that is made of the spherical lens group, or the achromatic coupled system that constitutes by non-spherical lens, realization focuses on to first seed light and second seed light time, and these two wavelength are all plated anti-reflection film.
8, according to each described dual wavelength pulse optical fiber laser system of claim 1 to 7, it is characterized in that described 45 ° of double color plates (5) are that seed light that first seed light source (1) is sent is high saturating, the seed light that second seed light source (4) is sent is high anti-and be the double color plate of 45 ° of placements with the seed light beam that described seed light source sends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620041589 CN2899204Y (en) | 2006-05-08 | 2006-05-08 | Dual-wavelength pulse fiber laser system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620041589 CN2899204Y (en) | 2006-05-08 | 2006-05-08 | Dual-wavelength pulse fiber laser system |
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|---|---|
| CN2899204Y true CN2899204Y (en) | 2007-05-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200620041589 Expired - Lifetime CN2899204Y (en) | 2006-05-08 | 2006-05-08 | Dual-wavelength pulse fiber laser system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100428585C (en) * | 2006-05-08 | 2008-10-22 | 中国科学院上海光学精密机械研究所 | Dual-wavelength pulse fiber laser system |
| CN102891424A (en) * | 2011-08-25 | 2013-01-23 | 清华大学 | Amplifying system of parallel injection fibre power |
| CN112068247A (en) * | 2020-09-21 | 2020-12-11 | 上海无线电设备研究所 | Multi-wavelength laser coaxial transmitting system |
-
2006
- 2006-05-08 CN CN 200620041589 patent/CN2899204Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100428585C (en) * | 2006-05-08 | 2008-10-22 | 中国科学院上海光学精密机械研究所 | Dual-wavelength pulse fiber laser system |
| CN102891424A (en) * | 2011-08-25 | 2013-01-23 | 清华大学 | Amplifying system of parallel injection fibre power |
| CN102891424B (en) * | 2011-08-25 | 2015-02-18 | 清华大学 | Amplifying system of parallel injection fibre power |
| CN112068247A (en) * | 2020-09-21 | 2020-12-11 | 上海无线电设备研究所 | Multi-wavelength laser coaxial transmitting system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20081022 |
|
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20081022 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |