CN109407440A - A kind of single-mode high-power amplifying device based on large mode field optical fiber - Google Patents
A kind of single-mode high-power amplifying device based on large mode field optical fiber Download PDFInfo
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- CN109407440A CN109407440A CN201710703460.4A CN201710703460A CN109407440A CN 109407440 A CN109407440 A CN 109407440A CN 201710703460 A CN201710703460 A CN 201710703460A CN 109407440 A CN109407440 A CN 109407440A
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 34
- 239000000835 fiber Substances 0.000 claims abstract description 111
- 230000003321 amplification Effects 0.000 claims abstract description 25
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 25
- 230000005540 biological transmission Effects 0.000 claims abstract description 21
- 238000005086 pumping Methods 0.000 claims abstract description 17
- 230000003287 optical effect Effects 0.000 claims abstract description 13
- 239000007787 solid Substances 0.000 claims description 10
- 230000000694 effects Effects 0.000 claims description 8
- 230000000644 propagated effect Effects 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 claims description 3
- 239000004065 semiconductor Substances 0.000 claims description 3
- 238000009738 saturating Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 6
- 230000009471 action Effects 0.000 abstract description 4
- 230000002401 inhibitory effect Effects 0.000 abstract 1
- 239000004038 photonic crystal Substances 0.000 description 5
- 239000013078 crystal Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
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- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009022 nonlinear effect Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229910052691 Erbium Inorganic materials 0.000 description 1
- 229910052689 Holmium Inorganic materials 0.000 description 1
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- 229910052775 Thulium Inorganic materials 0.000 description 1
- 229910052769 Ytterbium Inorganic materials 0.000 description 1
- 206010061592 cardiac fibrillation Diseases 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
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- 238000001228 spectrum Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
- G02F1/39—Non-linear optics for parametric generation or amplification of light, infrared or ultraviolet waves
- G02F1/395—Non-linear optics for parametric generation or amplification of light, infrared or ultraviolet waves in optical waveguides
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/10—Beam splitting or combining systems
- G02B27/1006—Beam splitting or combining systems for splitting or combining different wavelengths
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/02004—Optical fibres with cladding with or without a coating characterised by the core effective area or mode field radius
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/02033—Core or cladding made from organic material, e.g. polymeric material
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
- G02B6/4215—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms the intermediate optical elements being wavelength selective optical elements, e.g. variable wavelength optical modules or wavelength lockers
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Lasers (AREA)
Abstract
The present invention provides a kind of single-mode high-power amplifying device based on large mode field optical fiber, including pumping source, coupled lens group, the first dichroic mirror and the seed source set gradually along seed optical path direction, collimation lens set and the second dichroic mirror set gradually along pumping optical path direction, optical path overlaps at large mode field gain fibre.Seed light collimates not rebuffed propagation in the fibre core for being able to satisfy the large mode field gain fibre under certain length after collimation lens set collimates, and pump light forms waveguide under the action of coupled lens group in the fibre core of large mode field gain fibre, seed light not will form waveguide transmission in fibre core, good mode amplification output can be kept, while the waveguide transmission of pump light is capable of forming to the great gain of seed light；The heavy caliber large mode field gain fibre of use, to reduce the peak power of unit area, plays the role of inhibiting nonlinear fiber so that laser has biggish mode field area in amplification process.
Description
Technical field
The present invention relates to technical field of optical fiber, put more particularly, to a kind of single-mode high-power based on large mode field optical fiber
Big device.
Background technique
In power amplifier technology field, existing doubly clad optical fiber takes welding mode to realize full light in amplification process
Fibrillation, but since pump light and seed light are respectively formed waveguide transmission and lower mode field area in optical fiber, it can bring serious
Nonlinear effect and the output of poor mode.
In order to overcome above-mentioned limitation to obtain high-power and energy optical fiber output, rodlike photonic crystal fiber is adopted extensively
With especially in femtosecond fiber laser field.Rodlike photonic crystal fiber possesses compared with big mode field area and special construction is so that swash
Light keeps basic mode to transmit in amplification process, but prevents rodlike photonic crystal fiber from being bent without single mode cut-off characteristics, space
Compactedness be very restricted, and photonic crystal price is also fairly expensive.
Compared to rodlike photonic crystal fiber, single crystal fiber has bigger gain diameter and shorter length, single crystal fiber
It is good laser gain material due to can guarantee seed light straight-through be not rebuffed transmission and pump light waveguide transmission.But it is limited to
Single crystal fiber spectrum gain range is relatively narrow, and manufacture craft difficulty is big, the single crystal fiber of high quality not yet domestic at present.To monocrystalline
The research of optical fiber laser is also only limited to lower-wattage and smaller energy, and only there is more mature production in a small number of foreign studies mechanism
Product.
Summary of the invention
The present invention provide it is a kind of overcome the above problem or at least be partially solved the above problem based on large mode field optical fiber
Single-mode high-power amplifying device.
The present invention provides a kind of single-mode high-power amplifying device based on large mode field optical fiber, including along pumping optical path direction
Pumping source, coupled lens group, the first dichroic mirror and the seed source set gradually along seed optical path direction, the collimation set gradually
Lens group and the second dichroic mirror, optical path overlap at large mode field gain fibre；The pump light of pumping source transmitting passes through coupled lens
Group transmits the first dichroic mirror after focusing, and propagates to form waveguide into large mode field gain fibre, and seed source, which emits seed light, to be passed through
The second dichroic mirror is transmitted after collimation lens set collimation, and enters large mode field gain fibre collimation and propagates, and forms the pump light of waveguide
With the seed light of collimation in large mode field gain fibre collective effect, the amplification of power is carried out to seed light, after power amplification
Seed light is exported by the reflection of the first dichroic mirror, completes the amplification to seed light.
The invention has the benefit that seed light be able to satisfy after collimation lens set collimates it is big under certain length
Collimation not rebuffed propagation in the fibre core of mould field gain fibre, and pump light under the action of coupled lens group in large mode field gain
Waveguide is formed in optical fiber, under this transmission mode, seed light, which not will form waveguide transmission, can keep good mode amplification defeated
Out, while the waveguide transmission of pump light is capable of forming to the great gain of seed light, combines the biggish amplification of fiber amplifier
Function and the preferable zlasing mode of solid amplifier and beam quality；The heavy caliber large mode field gain fibre of use, so that laser
There is biggish mode field area in amplification process, inhibits nonlinear fiber to make so that the peak power for reducing unit area plays
With.
Based on the above technical solution, the present invention can also improve as follows.
It further, further include isolator, the isolator is arranged between the second dichroic mirror and collimation lens set, with resistance
Only pump light or reflection after seed light transmission.
Further, the pumping source uses semiconductor laser, solid state laser or optical fiber laser.
Further, the coupled lens group using two panels focal length be respectively 40mm and 150mm condenser lens combination and
At the coupled lens group is coated with the anti-reflection film of 976nm.
Further, the collimation lens set is combined using the condenser lens that two panels focal length is 500mm.
Further, first dichroic mirror and the second dichroic mirror are all made of plated film lens or fiber grating or optical fiber end
Mirror, first dichroic mirror and the second dichroic mirror to greater than 1000nm wavelength high pass, lower than the wavelength cut-off of 1000nm.
Further, the seed source uses the optical fiber or Solid State Laser light source of different wave length.
Further, the large mode field gain fibre includes large mode field gain fibre fibre core, is wrapped in the large mode field increasing
Covering on the outside of beneficial fiber core and the coat being wrapped on the outside of large mode field gain fibre covering, wherein the large mode field
The matrix of gain fibre is using quartz glass or multicomponent glass or multicomponent polymeric.
Further, the seed source is core diameter D0For the single mode optical fiber of 6um, numerical aperture NA is 0.12, collimation
2 ω of hot spot Gauss beam waist diameter is 500um；The diameter D1 of large mode field gain fibre fibre core is 800um, and the diameter of covering is
900um, the diameter of coat are 1200um.
Further, the maximum length of large mode field gain fibre can be calculated by following formula:
The of length no more than 33cm for the large mode field gain fibre then chosen by calculating.
Detailed description of the invention
Fig. 1 is the single-mode high-power amplifying device structural schematic diagram based on large mode field optical fiber of one embodiment of the invention；
Fig. 2 is large mode field gain fibre cross-sectional view；
Fig. 3 is the light path schematic diagram that seed light and pump light pass through large mode field gain fibre.
In attached drawing, component names representated by each label are as follows:
101, pumping source, 102, coupled lens group, the 103, first dichroic mirror, 104, large mode field gain fibre, 105, second
Dichroic mirror, 106, isolator, 107, collimation lens set, 108, seed source, 201, large mode field gain fibre fibre core, 202, large mode field
Gain fibre covering, 203, large mode field gain fibre coat, 204, the pump light propagated in large mode field gain fibre, 205,
The seed light propagated in large mode field gain fibre.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiments of the present invention will be described in further detail.Implement below
Example is not intended to limit the scope of the invention for illustrating the present invention.
Referring to Fig. 1, the single-mode high-power amplifying device based on large mode field optical fiber of one embodiment of the invention is provided, is wrapped
Include pumping source 101, coupled lens group 102, the first dichroic mirror 103 and along seed optical path set gradually along pumping optical path direction
Seed source 108, collimation lens set 107 and the second dichroic mirror 105 that direction is set gradually, optical path is in large mode field gain fibre 104
Place is overlapping.The entire working principle of whole device are as follows: the pump light that pumping source 101 emits is after the focusing of coupled lens group 102
The first dichroic mirror 103 is transmitted, and enters the propagation of large mode field gain fibre 104 and forms waveguide, seed source 108, which emits seed light, to be passed through
Collimation lens set 107 transmits the second dichroic mirror 105 after collimating, and enters the collimation of large mode field gain fibre 104 and propagate, and passes through to be formed
The collective effect of the pump light of waveguide and the seed light of collimation in large mode field optical fiber carries out the amplification of power, function to seed light
The amplified seed light of rate is exported by the reflection of the first dichroic mirror 103, completes the amplification of seed light.
Seed light is being able to satisfy the large mode field increasing under certain length after the collimation of collimation lens set 107 in the present embodiment
Collimation not rebuffed propagation in beneficial fiber core 201, and pump light under the action of coupled lens group 102 in large mode field gain light
Waveguide is formed in long and slender core 201 and large mode field gain fibre covering 202, under this transmission mode, seed light not will form wave
It leads transmission and collimates and propagate in large mode field gain fibre 104, good mode amplification output, while the wave of pump light can be kept
Transmission is led to be capable of forming to the great gain of seed light, combine the biggish enlarging function of fiber amplifier and solid amplifier compared with
Good zlasing mode and beam quality；In addition, using large mode field gain fibre 104, it is suppressed that present in superpower laser
Nonlinear effect.
It on the basis of the above embodiments, further include isolator 106, the isolator in one embodiment of the present of invention
106 are arranged between the second dichroic mirror 105 and collimation lens set 107, to prevent the seed light transmission after pump light or reflection.
Wherein, isolator 106 is set between the second dichroic mirror 105 and collimation lens set 107, setting isolator 106
Main function is to prevent pump light double-colored by second by the incident seed source 108 of large mode field gain fibre 104 and seed light
The reflection incidence seed source 108 of mirror 105, pump light and seed light can damage seed source 108 to the irradiation of seed source 108, therefore,
Isolator 106 is set between the second dichroic mirror 105 and collimation lens set 107, plays the role of protecting seed source 108.
On the basis of above-mentioned each embodiment, in another embodiment of the invention, pumping source 101 is swashed using semiconductor
Light device, solid state laser or optical fiber laser.
On the basis of above-mentioned each embodiment, in one embodiment of the present of invention, coupled lens group 102 and collimation lens
Group 107 can for the different lens combinations of single, two or more all kinds of face type curvature into can reach coupling or
The lens group of collimating effect.When concrete configuration, it is respectively the focusing of 40mm and 150mm that coupled lens group 102, which uses two panels focal length,
Lens combination forms, and the anti-reflection film of 976nm is coated with outside coupled lens group 102, to increase the transmission of coupled lens group 102
Ability.Collimation lens set 107 is combined using the condenser lens that two panels focal length is 500mm, can also take other differences
Combination, collimation requirements can be reached.
On the basis of above-mentioned each embodiment, in one embodiment of the present of invention, the first dichroic mirror 103 and second is double-colored
Mirror 105 is all made of plated film lens or fiber grating or optical fiber end mirror, and the first dichroic mirror 103 and the second dichroic mirror 105 are to being greater than
Wavelength high pass, the wavelength cut-off lower than 1000nm of 1000nm.
In the present embodiment, the first dichroic mirror 103 and the second dichroic mirror 105 can serve as high-pass filter, i.e. wavelength is big
Wave can pass through, the small wave of wavelength cannot pass through.
On the basis of above-mentioned each embodiment, in another embodiment of the invention, reference can be made to Fig. 2, large mode field gain
Optical fiber 104 includes large mode field gain fibre fibre core 201, the large mode field gain for being wrapped in 201 outside of large mode field gain fibre fibre core
Fibre cladding 202 and the large mode field gain fibre coat 203 for being wrapped in 202 outside of large mode field gain fibre covering.
Wherein, the matrix of large mode field gain fibre 104 uses quartz glass or multicomponent glass or multicomponent polymeric,
The Doped ions of 104 fibre core of large mode field gain fibre are one or more of Yb, Nd, Er, Ho, Tm combination.
On the basis of the various embodiments described above, in one embodiment of the present of invention, seed source 108 uses the light of different wave length
Fine or Solid State Laser light source.Seed source 108 uses single mode optical fiber, the core diameter D of seed source 1080For 6um, numerical aperture
NA is 0.12, and collimation 2 ω of hot spot Gaussian beam waist diameter is 500um.The diameter D1 of 104 fibre core of large mode field gain fibre is 800um,
The diameter of 104 covering of large mode field gain fibre is 900um, and the diameter of the coat is 1200um.
It should be noted that the seed light that seed source 108 generates is passed through after collimation lens set 107, although having carried out standard
Directly, but only enter after the large mode field gain fibre of certain length, can just be maintained at entire large mode field gain fibre 104
Collimation passes through in fibre core, if the length of large mode field gain fibre 104 is too big, not can guarantee seed light can collimate wherein
It propagates.Therefore, it is necessary to design the parameter of the optical fiber parameter of seed source 108 and large mode field gain fibre 104, the parameter coordination of the two
It can be only achieved good effect.Wherein, after being configured to the parameter of seed source 108, joined according to the optical fiber of seed source 108
Several and large mode field gain fibre 104 parameter can determine the appropriate length of large mode field gain fibre 104, specifically, can lead to
Cross the maximum length that following formula calculates large mode field gain fibre 104:
Large mode field gain fibre 104 is configured according to the length calculated, and meets seed light only in large mode field gain light
Not rebuffed requirement is propagated in the fibre core of fibre 104.On the basis of above-mentioned each embodiment, it is calculated greatly according to above-mentioned formula
Of length no more than 33cm of mould field gain fibre 104.
Wherein, the transmission path of seed light and pump light in large mode field gain fibre is as shown in figure 3, pumping source 101 is sent out
The 976nm pump light penetrated enters large mode field gain fibre 104 by 45 ° of dichroic mirrors 103 after the focusing of coupled lens group 102
It is interior, it is formed in the pump light 204 propagated in large mode field gain fibre 104.Large mode field gain fibre 104 absorbs pump light, provides
Enough population inversion.The seed light of 108 transmitting of seed light member simultaneously is collimated by collimation lens set 107, and isolator 106 rises
To the effect for preventing backlight from protecting seed source.Seed light filters out the pump light of seed photodoping by the second dichroic mirror 105.Kind
Sub-light is formed in the seed light 205 propagated in large mode field gain fibre 104, in particle after entering large mode field gain fibre 104
Cause stimulated radiation on the basis of number reversion, upper energy level particle drops to lower energy level, carries out gain amplification to seed signal light.Amplification
Seed signal light afterwards reflects output under the effect of the first dichroic mirror 103, completes the amplification to seed signal light.
A kind of single-mode high-power amplifying device based on large mode field optical fiber provided by the invention, seed light is saturating by collimation
It is able to satisfy after microscope group collimation and collimates not rebuffed propagation in the large mode field gain fibre fibre core under certain length, and pump light exists
Waveguide is formed in large mode field gain fibre under the action of coupled lens group, under this transmission mode, seed light not will form
Waveguide transmission can keep good mode amplification output, while the waveguide transmission of pump light is capable of forming and greatly increases to seed light
Benefit combines the biggish enlarging function of fiber amplifier and the preferable zlasing mode of solid amplifier and beam quality；It uses
Heavy caliber large mode field gain fibre, so that laser has biggish mode field area in amplification process, to reduce unit area
Peak power play the role of inhibit nonlinear fiber；Seed light is similar to the amplification transmission of not being rebuffed in solid amplification, makes defeated
Possess preferable zlasing mode and beam quality out；Pump light is similar to the waveguide transmission in fiber amplifier, and biggish light path makes
Laser obtains biggish gain coefficient, plays and improves the fiber pulse chirp amplification that fiber amplifier is especially in ultrafast field
The effect of device output power.
The travelling-wave amplifier of one way backward pump structure is had chosen in the embodiment of the present invention, the traveling wave of other working methods is put
Big device such as one way forward pumping or one way two directional pump, multi-way amplifier, for example contains resonant cavity, the laser such as regenerative amplifier
Device structure can all apply the technology of the present invention.In above-mentioned different structure amplifier, by seed source optical fiber parameter, large mode field increasing
The single-mode high-power amplification based on large mode field optical fiber equally may be implemented in beneficial optical fiber parameter, the rational design for amplifying optical path.
Finally, the present processes are only preferable embodiment, it is not intended to limit the scope of the present invention.It is all
Within the spirit and principles in the present invention, any modification, equivalent replacement, improvement and so on should be included in protection of the invention
Within the scope of.
Claims (10)
1. a kind of single-mode high-power amplifying device based on large mode field optical fiber, which is characterized in that including along pumping optical path direction according to
Pumping source, coupled lens group, the first dichroic mirror and the seed source set gradually along seed optical path direction, the collimation of secondary setting are saturating
Microscope group and the second dichroic mirror, optical path overlap at large mode field gain fibre；
The pump light of pumping source transmitting transmits the first dichroic mirror after the focusing of coupled lens group, and enters large mode field gain fibre
Propagation forms waveguide, and seed source transmitting seed light transmits the second dichroic mirror after collimation lens set collimates, and enters large mode field
Gain fibre collimation is propagated, and the seed light of the pump light and collimation that form waveguide collective effect in large mode field gain fibre is right
Seed light carries out the amplification of power, and the seed light after power amplification is exported by the reflection of the first dichroic mirror, completes to seed light
Amplification.
2. single-mode high-power amplifying device as described in claim 1, which is characterized in that it further include isolator, the isolator
It is arranged between the second dichroic mirror and collimation lens set, to prevent the seed light transmission after pump light or reflection.
3. single-mode high-power amplifying device as described in claim 1, which is characterized in that the pumping source uses semiconductor laser
Device, solid state laser or optical fiber laser.
4. single-mode high-power amplifying device as described in claim 1, which is characterized in that the coupled lens group is burnt using two panels
Condenser lens away from respectively 40mm and 150mm combines, and the coupled lens group is coated with the anti-reflection film of 976nm.
5. single-mode high-power amplifying device as claimed in claim 2, which is characterized in that the collimation lens set is burnt using two panels
It is combined away from the condenser lens for being 500mm.
6. single-mode high-power amplifying device as claimed in claim 2, which is characterized in that first dichroic mirror and second double-colored
Mirror is all made of plated film lens or fiber grating or optical fiber end mirror, and first dichroic mirror and the second dichroic mirror are to greater than 1000nm's
Wavelength high pass, the wavelength cut-off lower than 1000nm.
7. single-mode high-power amplifying device as described in claim 1, which is characterized in that the seed source is using different wave length
Optical fiber or Solid State Laser light source.
8. single-mode high-power amplifying device as described in claim 1, which is characterized in that the large mode field gain fibre includes big
Mould field gain fibre fibre core, the covering being wrapped on the outside of the large mode field gain fibre fibre core and it is wrapped in large mode field gain light
Coat on the outside of fine covering, wherein the matrix of the large mode field gain fibre using quartz glass or multicomponent glass or
Multicomponent polymeric.
9. single-mode high-power amplifying device as claimed in claim 8, which is characterized in that the seed source is core diameter D0For
The single mode optical fiber of 6um, numerical aperture NA are 0.12, and collimation 2 ω of hot spot Gaussian beam waist diameter is 500um；Large mode field gain fibre
The diameter D1 of fibre core is 800um, and the diameter of covering is 900um, and the diameter of coat is 1200um.
10. single-mode high-power amplifying device as claimed in claim 9, which is characterized in that big mould can be calculated by following formula
The maximum length of field gain fibre:
The of length no more than 33cm for the large mode field gain fibre then chosen by calculating.
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| CN201710703460.4A CN109407440B (en) | 2017-08-16 | 2017-08-16 | Single-mode high-power amplification device based on large-mode-field optical fiber |
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| CN109407440B CN109407440B (en) | 2020-09-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110707516A (en) * | 2019-10-11 | 2020-01-17 | 中国船舶重工集团公司第七0七研究所 | Erbium-doped optical fiber light source outputting high power after single pass |
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| CN107045248A (en) * | 2017-06-14 | 2017-08-15 | 上海朗研光电科技有限公司 | A kind of nonlinear optical fiber amplified broad band four-wave mixing generation device |
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2017
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|---|---|---|---|---|
| US6282016B1 (en) * | 1997-12-08 | 2001-08-28 | Sdl, Inc. | Polarization maintaining fiber lasers and amplifiers |
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| CN110707516A (en) * | 2019-10-11 | 2020-01-17 | 中国船舶重工集团公司第七0七研究所 | Erbium-doped optical fiber light source outputting high power after single pass |
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| CN109407440B (en) | 2020-09-25 |
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