CN207021503U - A kind of single frequency optical fiber laser nonlinear effect restraining device - Google Patents
A kind of single frequency optical fiber laser nonlinear effect restraining device Download PDFInfo
- Publication number
- CN207021503U CN207021503U CN201720944817.3U CN201720944817U CN207021503U CN 207021503 U CN207021503 U CN 207021503U CN 201720944817 U CN201720944817 U CN 201720944817U CN 207021503 U CN207021503 U CN 207021503U
- Authority
- CN
- China
- Prior art keywords
- optical fiber
- single frequency
- restraining device
- nonlinear effect
- fiber laser
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Lasers (AREA)
Abstract
The utility model provides one kind and is directed to single frequency optical fiber laser nonlinear effect restraining device, is made up of plane fiber reel, optical fiber channel, slit, inflation port, optical fiber cover plate, TEC refrigerators；The optical fiber channel of racetrack is carved with the plane fiber reel, place TEC refrigerators in centre, four slits pass through optical fiber channel from four angles respectively, four inflation ports pass through four slits, and avoid the position of optical fiber channel, optical fiber cover plate is located at four bent angles of optical fiber channel respectively, for fixing optical fiber.Optical fiber channel filling heat-conducting glue is radiated.The utility model can effectively lift the stimulated Brillouin scattering threshold value in high power single frequency optical fiber laser, realize that the high-power of single frequency fiber laser, high light beam quality, stabilization export, its apparatus structure is simple, compact.
Description
Technical field
Fiber laser technology field is the utility model is related to, more particularly to it is a kind of non-linear for single frequency optical fiber laser
Effect restraining device.
Background technology
High power single frequency optical fiber laser has unique advantage, its extensive use in power level and line width characteristic etc.
In fields such as laser radar, nonlinear frequency conversion, coherently combineds.Small-power narrow-linewidth single frequency laser is generally basede on as kind
Component, using seed source master oscillation power amplification (MOPA) structure, to realize its high-power and narrow linewidth output performance.But by
The line width of seed source laser is very narrow in the structure, and the relatively limited core size of doping double-cladding optical fiber and longer
Action length, the power output of single frequency optical fiber laser is caused to lift the main very big restriction for receiving stimulated Brillouin scattering.
Non-linear process of this generation in optical fiber, is that it has caused by incident pump light is modulated by optical fiber by molecular vibration
Obvious gain and threshold trait.When once reach Brillouin scattering threshold value, stimulated Brillouin scattering is by most signal light
Power is converted to reverse stokes light, that is, causes the reduction of laser output power or light-light conversion efficiency.Therefore, it is excited cloth
In deep pool scattering significantly limit the lifting of single frequency fiber laser output power.
At present, suppress optical fiber laser in stimulated Brillouin scattering common methods have it is following several：
(1) the highly doped big core diameter doping double-cladding optical fiber of short length is used, that is, increases the mode field area of optical fiber and improves it
Doping with rare-earth ions concentration, this method is possible to influence whole optical fiber laser device architecture, and the optical fiber of special requirement is not
Easily customization.
(2) mode such as temperature or stress gradient distribution is being applied along doubly clad optical fiber axial direction to reduce stimulated Brillouin scattering
Effective g-factor, and then suppress stimulated Brillouin scattering.But only by being distributed not along doubly clad optical fiber axial direction heat
Uniformity (passive mode) is realized, does not provide the realization rate of specific stress distribution.In addition, Chinese patent：
The single-mode fiber that 201010104948.3 pairs of length are 50m applies thermograde and longitudinal pressure or tension force simultaneously, to realize suppression
The purpose of stimulated Brillouin scattering processed.But this method does not provide specific technological means, and it is suitable only for undoped dilute
The single-mode fiber of native ion, be not suitable for the situation of doping double-cladding optical fiber.Also there are the U of Chinese patent CN 205212166, using post
Shape optical fiber dish structure realizes the suppression of stimulated Brillouin scattering, but its column optical fiber disk for using, inapplicable high power laser are put
Big device, excessive height, the small size for being also unfavorable for laser integrate；
(3) Fiber Bragg Grating FBG is used, i.e., is passed through the paired fl transmission pump light of Grating Design, and is based on being excited cloth
In deep pool scattering caused by Stokes frequency spectrum then fall in its stopband, stokes light by optical grating reflection and and pump light it is past together
Preceding transmission.
The content of the invention
For the above, the utility model provides a kind of single frequency optical fiber laser nonlinear effect restraining device, gram
Take the shortcomings of existing apparatus is complicated, integrated level is relatively low, volume is big.By by the high-power single frequency optical fiber laser
Doping double-cladding optical fiber, coil on by plane fiber reel, doping double-cladding optical fiber produces heat in itself, freezes plus TEC
Device is in plane fiber reel center so that doping double-cladding optical fiber produces the temperature field of uneven distribution.Described doping is double
Cladded-fiber is embedded in being fixed on inside the uneven optical fiber channel of metal cylinder body side surface, to form its stress distribution not
Uniformity, the size of slit can be adjusted by inflation port, further enhance the inhomogeneities of doped fiber stress field.Using upper
The inhomogeneities along doping double-cladding optical fiber axially or radially temperature and stress distributions is stated, the brillouin gain of optical fiber can be extended
Bandwidth, significantly increase the stimulated Brillouin scattering threshold value of laser system.In addition, using the mode of winding bending, can filter out
Higher order mode in doubly clad optical fiber, high-power, high light beam quality, the output of stable single frequency fiber laser may finally be realized.
Particular technique solution of the present utility model is as follows：
A kind of single frequency optical fiber laser nonlinear effect restraining device, by plane fiber reel, optical fiber channel, slit, swollen
Swollen hole, optical fiber cover plate, TEC refrigerators are formed；The optical fiber channel of racetrack is carved with the plane fiber reel, centre is placed
TEC refrigerators, it adhere well on plane fiber reel, four slits pass through optical fiber channel, four expansions from four angles respectively
Hole passes through four slits, and avoids the position of optical fiber channel, and optical fiber cover plate is located at four bent angles of optical fiber channel respectively, with plane
Type fiber reel has screw to fix.
Further, the material of described plane fiber reel is metallic copper, aluminium.
Further, the minimum diameter of described optical fiber channel is 12cm.
Further, described slit runs through optical fiber channel, and crack width is less than 0.5mm, the minimum range of each crack
More than 5cm.
Further, angle is 80 ° to 120 ° between described slit.
Further, described optical fiber channel width and uniform depth or not of uniform size, its width of thread and depth point
Wei not be 50~5000 μm, 50~5000 μm.
Further, described optical fiber channel coils the doping double-cladding optical fiber in high-power single frequency optical fiber laser, and
And filling heat-conducting cream.
Further, described inflation port dilation dimension is 0~1000 μm.
Further, the installation site of described optical fiber cover plate circumvents crack.
Brief description of the drawings
Fig. 1 single frequency optical fiber laser nonlinear effect restraining devices
Fig. 2 is optical fiber channel schematic shapes
1 plane fiber reel
2 optical fiber channels
3 optical fiber cover plates
4 TEC refrigerators
5 inflation ports
6 slits
Embodiment：
Embodiment 1：
As shown in figure 1, a kind of single frequency optical fiber laser nonlinear effect restraining device, by plane fiber reel, optical fiber duct
Road, slit, inflation port, optical fiber cover plate, TEC refrigerators are formed；The optical fiber channel of racetrack is carved with the plane fiber reel,
TEC refrigerators are placed in centre, adhere well on plane fiber reel, and four slits pass through optical fiber channel from four angles respectively,
Four inflation ports pass through four slits, and avoid the position of optical fiber channel, and optical fiber cover plate is curved positioned at four of optical fiber channel respectively
Angle, there is screw to fix with plane fiber reel.
As shown in Fig. 2 optical fiber channel can be different shape in the utility model embodiment, it is shaped as not of uniform size
Rectangle, it is alternately arranged and forms.Optical fiber channel width and uniform depth are not of uniform size, and its width of thread and depth are respectively 50
~5000 μm, 50~5000 μm.
Wherein, the material of plane fiber reel is the preferable metals of thermal conductivity such as metallic copper, aluminium, to meet beam quality
Demand, the minimum diameter of optical fiber channel is 12cm, can effectively filter out caused high-order mode in amplification process.Slit runs through optical fiber
Conduit, crack width are less than 0.5mm, and the minimum range of each crack is more than 5cm, and angle is more than 80 °, and less than 120 °, slit leads to
Linear cutter is crossed to form.
To meet the needs of high power is using radiating, optical fiber channel coils the doping pair in high-power single frequency optical fiber laser
After cladded-fiber, filled with heat-conducting cream.Inflation port has expansion screw to carry out expansion change greatly, so as to change the size of slit sizes,
The varying dimensions of expansion are 0~1000 μm.The installation site of optical fiber cover plate circumvents crack, and in expansion process, optical fiber cover plate is used
It will not be ejected in guarantee optical fiber.
Preferred embodiment of the present utility model is the foregoing is only, is not limited to the utility model, for this
For the technical staff in field, the utility model can have various modifications and variations.It is all in the spirit and principles of the utility model
Within, any modification, equivalent substitution and improvements made etc., it should be included within the scope of protection of the utility model.
Claims (9)
- A kind of 1. single frequency optical fiber laser nonlinear effect restraining device, by plane fiber reel, optical fiber channel, slit, expansion Hole, optical fiber cover plate, TEC refrigerators are formed；The optical fiber channel of racetrack is carved with the plane fiber reel, TEC is placed in centre Refrigerator, it adhere well on plane fiber reel, four slits pass through optical fiber channel from four angles respectively, and four inflation ports are worn Four slits are crossed, and avoid the position of optical fiber channel, optical fiber cover plate is located at four bent angles of optical fiber channel respectively, with plane light Fine disk has screw to fix.
- A kind of 2. single frequency optical fiber laser nonlinear effect restraining device as claimed in claim 1, it is characterised in that：Described The material of plane fiber reel is metallic copper or aluminium.
- A kind of 3. single frequency optical fiber laser nonlinear effect restraining device as claimed in claim 1, it is characterised in that：Described The minimum diameter of optical fiber channel is 12cm.
- A kind of 4. single frequency optical fiber laser nonlinear effect restraining device as claimed in claim 1, it is characterised in that：Described Slit runs through optical fiber channel, and crack width is less than 0.5mm, and the minimum range of each crack is more than 5cm.
- A kind of 5. single frequency optical fiber laser nonlinear effect restraining device as claimed in claim 1, it is characterised in that：Described Angle is 80 ° to 120 ° between slit.
- A kind of 6. single frequency optical fiber laser nonlinear effect restraining device as claimed in claim 1, it is characterised in that：Described Optical fiber channel width and uniform depth are not of uniform size, and its width of thread and depth are each independently 50~5000 μm.
- A kind of 7. single frequency optical fiber laser nonlinear effect restraining device as claimed in claim 1, it is characterised in that：Described Optical fiber channel coils the doping double-cladding optical fiber in high-power single frequency optical fiber laser, and fills heat-conducting cream.
- A kind of 8. single frequency optical fiber laser nonlinear effect restraining device as claimed in claim 1, it is characterised in that：Described Inflation port dilation dimension is 0~1000 μm.
- A kind of 9. single frequency optical fiber laser nonlinear effect restraining device as claimed in claim 1, it is characterised in that：Described The installation site of optical fiber cover plate circumvents crack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720944817.3U CN207021503U (en) | 2017-07-31 | 2017-07-31 | A kind of single frequency optical fiber laser nonlinear effect restraining device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720944817.3U CN207021503U (en) | 2017-07-31 | 2017-07-31 | A kind of single frequency optical fiber laser nonlinear effect restraining device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207021503U true CN207021503U (en) | 2018-02-16 |
Family
ID=61482570
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720944817.3U Active CN207021503U (en) | 2017-07-31 | 2017-07-31 | A kind of single frequency optical fiber laser nonlinear effect restraining device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207021503U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115113353A (en) * | 2022-06-21 | 2022-09-27 | 中国人民解放军国防科技大学 | Device for assisting optical fiber plane winding |
-
2017
- 2017-07-31 CN CN201720944817.3U patent/CN207021503U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115113353A (en) * | 2022-06-21 | 2022-09-27 | 中国人民解放军国防科技大学 | Device for assisting optical fiber plane winding |
| CN115113353B (en) * | 2022-06-21 | 2023-10-03 | 中国人民解放军国防科技大学 | Device for assisting optical fiber plane winding |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Su et al. | 2.43 kW narrow linewidth linearly polarized all-fiber amplifier based on mode instability suppression | |
| CN101752779B (en) | Combined large-diameter neodymium glass disk laser amplifier of gradient doping component | |
| CN103151682B (en) | Anti-Strokes Raman fiber laser achieving multi-wavelength output | |
| Kotov et al. | Record-peak-power all-fiber single-frequency 1550 nm laser | |
| CN111541138B (en) | Device for inhibiting stimulated Brillouin scattering in high-power narrow-linewidth optical fiber laser | |
| CN103825169A (en) | Fiber laser based on doped fiber random phase shift raster | |
| CN207021503U (en) | A kind of single frequency optical fiber laser nonlinear effect restraining device | |
| CN112018587B (en) | Method for realizing high-power single-frequency fiber laser output by inhibiting SBS (styrene butadiene styrene) | |
| CN102684045A (en) | High-power broadband ASE (Amplified Spontaneous Emission) light source in 1064 nm waveband | |
| CN104009380A (en) | 1.6-micron wave band pulse type single-frequency linear polarization laser | |
| CN103944043A (en) | In-band pumping 975-nanometer single-frequency fiber laser with ytterbium-doped silica optical fiber | |
| CN105140762B (en) | A kind of pulse optical fiber of semiconductor laser seed source | |
| CN105322431A (en) | Device for inhibiting stimulated brillouin scattering in high-power single-frequency optical fiber laser | |
| CN205212166U (en) | Improve device of stimulated brillouin scattering threshold value among high -power single -frequency fiber laser | |
| Zhou et al. | Core-pumped mode-locked ytterbium-doped fiber laser operating around 980 nm | |
| Liu | Novel SBS suppression scheme for high-power fiber amplifiers | |
| CN100392449C (en) | Broadband light source | |
| CN204905648U (en) | Optic fibre - mixed laser instrument of diode pumped solid | |
| CN202616595U (en) | High power broadband amplified spontaneous emission (ASE) light source of 1064 nm wave band | |
| CN103236631A (en) | Active Q-switching single-frequency optical fiber laser using rare earth-doped quartz optical fiber as gain medium | |
| CN105322421B (en) | Improve the device of stimulated Brillouin scattering threshold value in high-power single frequency optical fiber laser | |
| CN103311783A (en) | Single-frequency Raman optical fiber laser | |
| CN202997294U (en) | Single-frequency fiber laser of tunable narrow linewidth array format | |
| Berkdemir et al. | On the temperature-dependent gain and noise figure analysis of C-band high-concentration EDFAs with the effect of cooperative upconversion | |
| Panjeta et al. | Gain Optimization of EDF Optical Amplifier by Stages Enhancement and Variation in Input Pumping Power |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |