CN208571218U - A kind of acousto-optic Q-switching for optical fiber laser - Google Patents
A kind of acousto-optic Q-switching for optical fiber laser Download PDFInfo
- Publication number
- CN208571218U CN208571218U CN201821350271.XU CN201821350271U CN208571218U CN 208571218 U CN208571218 U CN 208571218U CN 201821350271 U CN201821350271 U CN 201821350271U CN 208571218 U CN208571218 U CN 208571218U
- Authority
- CN
- China
- Prior art keywords
- acousto
- optical fiber
- optic
- reflecting mirror
- light
- 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
- Optical Couplings Of Light Guides (AREA)
Abstract
The utility model discloses a kind of acousto-optic Q-switching for optical fiber laser, including optical fiber collimator, acousto-optic modulator, condenser lens, the reflecting mirror being set in sequence, wherein, optical fiber collimator goes out light with the Bragg angle of acousto-optic modulator, it is projected inside the acousto-optic crsytal with a tight waist in acousto-optic modulator of laser, and reflecting mirror is placed in the near focal point of condenser lens and reflecting mirror is adjustable.The first-order diffraction light of acousto-optic modulator is converged by condenser lens, then by reflecting mirror reflection coupling to optical fiber collimator, with structure is simple, overall efficiency is high, stability is good and high reliability.
Description
Technical field
The utility model relates to laser technology field, especially a kind of acousto-optic Q-switching for optical fiber laser.
Background technique
Optical fiber laser is a kind of novel high-performance laser, has line width, good beam quality, is easy to and transmission fiber
The advantages that coupling, has a very wide range of applications in fields such as laser scanning, laser processing, fiber optic communications.Currently, most of light
Mainly realized using fiber coupling acousto-optic modulator on fibre laser and adjust Q, i.e. acousto-optic Q-switching, basic structure as shown in Figure 1,
Including the first optical fiber collimator 101, acousto-optic modulator 102, the second optical fiber collimator 103, fiber bragg grating 104.First
Optical fiber collimator 101 goes out light and is incident on acousto-optic modulator 102 with Bragg angle, by the one of the output of 102 diffraction of acousto-optic modulator
Grade is realized optically coupling to the second optical fiber collimator 103 using in 104 reflected light fibre laser of fiber bragg grating
Laser Q-switching output.Since optical fiber collimator goes out the Gaussian beam characteristic of light, which is usually all to make girdling the waist for optical fiber collimator
Just at the acousto-optic crsytal in acousto-optic modulator 102, it not only can guarantee that the work of acousto-optic modulator 102, but also can be in optimum state
So that the coupling effect of two optical fiber collimators is optimal, thus make that integrally-built stability is good, high reliablity, but disadvantage is just
It is higher cost.
J. article, patent 200810047688.3 and the patent that A. Alvarez-Chavez et al. is delivered
The acousto-optic Q-switching of another structure is all referred in 201110004288.6, basic structure is as shown in Fig. 2, include band angle
Input optical fibre 201, lens 202, acousto-optic modulator 203, reflecting mirror 204, the input optical fibre 201 with angle and 202 structure of lens
At input collimator, the level-one light of reflecting mirror 204 and the output of 203 diffraction of acousto-optic modulator vertically forms feedback, which realizes
Identical with double fiber coupling acousto-optic modulators function, and can make the volume of optical fiber laser is smaller, structure more
It is compact.But due to the working characteristics of acousto-optic modulator, to reach highest diffraction efficiency, inputting the with a tight waist of collimator need to be in sound
At acousto-optic crsytal in optical modulator, this structure can not make input the with a tight waist of collimator fall on the mirror, i.e., reflecting mirror with
It inputting between collimator and is coupled for defocus, so that coupling efficiency reduces, system is very sensitive to the angle change of reflecting mirror for this meeting,
When minor changes such as temperature change, erection stress variations, the unstable of coupling efficiency will cause, so that the performance of whole system
It reduces.And if as Fig. 3 will input the with a tight waist of collimator and put on the mirror, and can make to input the with a tight waist not in acousto-optic of collimator
In acousto-optic crsytal in modulator, the need that spot size of the laser in acousto-optic crsytal is all satisfied maximum diffraction efficiency are not can guarantee
It asks, diffraction efficiency is caused to reduce, therefore the structure has larger limitation in practical applications.
Summary of the invention
In order to solve the above technical problems, the purpose of this utility model is to provide a kind of acousto-optic Q for optical fiber laser
Switch has the advantages that small in size, compact-sized, overall efficiency is high, high reliablity and at low cost.
In order to realize above-mentioned technical purpose, the technical solution adopted in the utility model are as follows:
A kind of acousto-optic Q-switching for optical fiber laser comprising the optical fiber collimator that is set in sequence, acousto-optic modulator,
Condenser lens and reflecting mirror, the optical fiber collimator go out light with the Bragg angle of the acousto-optic modulator.
Further, the optical fiber collimator issues inside the acousto-optic crsytal with a tight waist in the acousto-optic modulator of laser.
Further, the reflecting mirror is set to the focal point of condenser lens.
A kind of optical fiber laser, should be by there is the acousto-optic Q-switching for optical fiber laser described above.
Using above-mentioned technical solution, the utility model compared to the prior art, has the beneficial effect that this programme
The function that acousto-optic Q-switching is realized by the way of condenser lens and arrangement of mirrors, compared to optical fiber collimator and optical fiber cloth
The composite structure of glug grating is simpler and cost is lower；It is poly- by increasing compared to the structure of simple reflector reflection coupling
Focus lens reduce the sensibility of optical path, improve overall efficiency, and reliability is higher, and simple process is easily achieved.
Detailed description of the invention
The utility model is further elaborated with reference to the accompanying drawings and detailed description:
Fig. 1 is the Q-switch basic structure schematic diagram of one of prior art；
Fig. 2 is two Q-switch basic structure schematic diagram of the prior art；
Fig. 3 is three Q-switch basic structure schematic diagram of the prior art；
Fig. 4 is the brief implementation structural schematic diagram of the utility model；
Fig. 5 is the schematic shapes of the reflecting mirror coating film area of the utility model.
Specific embodiment
As shown in figure 4, the utility model is used for the acousto-optic Q-switching of optical fiber laser comprising the optical fiber being set in sequence is quasi-
Straight device 301, acousto-optic modulator 302, condenser lens 303 and reflecting mirror 304, the optical fiber collimator 301 is with the acousto-optic tune
The Bragg angle of device 302 processed goes out light and the optical fiber collimator 301 issues the with a tight waist in the acousto-optic modulator of laser beam
Inside 302 acousto-optic crsytal.Wherein, the reflecting mirror 304 can be whole face plated film, be also possible to a specific region size
Partial coatings, the size in Partial coatings region 305 are that basement membrane waist radius size is exported according to optical fiber laser by certain ratio
Example amplification.It is general to can be 1~2 times, preferably 1.5~1.7 times.
As shown in Figure 5 a, the reflecting mirror 304 is whole face plated film.
As shown in Figure 5 b, the Partial coatings region 305 is circular film.According to actual needs, the Partial coatings area
Domain 305 is also possible to square or rectangular or polygon.
As shown in Figure 5 c, the Partial coatings region 305 except circular membrane there are a circle ring area not plated film, except again
Continue to be coated with film layer.
Embodiment 1
As shown in Figure 5 a, the reflecting mirror 304 is whole face plated film.The 301 incident laser mode of optical fiber collimator is base
Mould, when the acousto-optic modulator 302 work, diffraction occurs for incident light, and the acousto-optic modulator 302 exports zero order light and level-one
Diffraction light, zero order light and level-one light are all basement membrane, and certain deflection has occurred relative to the angle of zero order light for level-one light；Zero order light
It is incident on the condenser lens 303 simultaneously with level-one light, is converged by the condenser lens 303, adjusts the condenser lens 303
With the reflecting mirror 304, make zero order light and level-one light while reflecting, keeps its emerging beam with a tight waist by the condenser lens 303
It also is located inside the acousto-optic crsytal of the acousto-optic modulator 302, is then return to the optical fiber collimator 301, can make to couple at this time
Efficiency reaches maximum value, and is an entirety by the condenser lens 303 and 304 fixing assembling of reflecting mirror.Because diffraction light
Energy is distributed mainly on level-one light, and there are certain angles again between zero order light and level-one light, so only level-one is optically coupling to institute
Optical fiber collimator 301 is stated, zero order light can not be coupled in the optical fiber collimator 301.
When the acousto-optic modulator 302 does not work, the acousto-optic modulator is incident on from the optical fiber collimator 301
Diffraction does not occur for 302 light, i.e., the only zero order light exported from the acousto-optic modulator 302, and zero order light is described by fixation
After condenser lens 302 and the reflecting mirror 304 reflect, still it can not be coupled in the optical fiber collimator 301.
Embodiment 2
As shown in Fig. 5 b or 5c, the Partial coatings region 305 of the reflecting mirror 304 is circular film.The fiber optic collimator
There are high-order modes for 301 incident laser mode of device, and when the acousto-optic modulator 302 work, diffraction, the acousto-optic occur for incident light
Modulator 302 exports zero order light and first-order diffraction light, zero order light and level-one light also all have high-order film, and level-one light is relative to zero level
Certain deflection has occurred in the angle of light；Zero order light and level-one light are incident on the condenser lens 303 simultaneously, by the focusing
Lens 303 converge to the reflecting mirror 304, and the border circular areas size in the Partial coatings region 305 on the reflecting mirror 304 is base
Basic mode can only be reflected, filter out other high-order modes by 1.5 times of mould waist radius, and the zero order light and level-one light of reflection are all basic mode,
The condenser lens 303 and the reflecting mirror 304 are adjusted, makes to make its emerging beam also position with a tight waist by the condenser lens 303
Inside the acousto-optic crsytal of the acousto-optic modulator 302, it is then return to the optical fiber collimator 301, coupling efficiency can be made at this time
Reach maximum value, and is an entirety by the condenser lens 303 and 304 fixing assembling of reflecting mirror.Because of the energy of diffraction light
It is distributed mainly on level-one light, there are certain angles again between zero order light and level-one light, so only level-one is optically coupling to the light
Fine collimator 301, zero order light can not be coupled in the optical fiber collimator 301.
When the acousto-optic modulator 302 does not work, the acousto-optic modulator is incident on from the optical fiber collimator 301
Diffraction does not occur for 302 light, i.e., the only zero order light exported from the acousto-optic modulator 302, and zero order light is described by fixation
After condenser lens 302 and the reflecting mirror 304 reflect, still it can not be coupled in the optical fiber collimator 301.
The foregoing describe specific embodiment of the present utility model, it will be appreciated by those of skill in the art that this is only
Be for example, those skilled in the art is under the premise of without departing substantially from the principles of the present invention and essence, can be to this reality
The mode of applying makes various changes or modifications, but these change and modification each fall within the protection scope of the utility model.
Claims (4)
1. a kind of acousto-optic Q-switching for optical fiber laser, it is characterised in that: it includes the optical fiber collimator being set in sequence, sound
Optical modulator, condenser lens and reflecting mirror, the optical fiber collimator go out light with the Bragg angle of the acousto-optic modulator.
2. a kind of acousto-optic Q-switching for optical fiber laser according to claim 1, it is characterised in that: the optical fiber is quasi-
Straight device issues inside the acousto-optic crsytal with a tight waist in the acousto-optic modulator of laser beam.
3. a kind of acousto-optic Q-switching for optical fiber laser according to claim 1, it is characterised in that: the reflecting mirror
Set on the focal point of the condenser lens.
4. a kind of optical fiber laser, it is characterised in that: it includes as described in one of claims 1 to 3 for optical fiber laser
Acousto-optic Q-switching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821350271.XU CN208571218U (en) | 2018-08-21 | 2018-08-21 | A kind of acousto-optic Q-switching for optical fiber laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821350271.XU CN208571218U (en) | 2018-08-21 | 2018-08-21 | A kind of acousto-optic Q-switching for optical fiber laser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208571218U true CN208571218U (en) | 2019-03-01 |
Family
ID=65450770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821350271.XU Active CN208571218U (en) | 2018-08-21 | 2018-08-21 | A kind of acousto-optic Q-switching for optical fiber laser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208571218U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110364925A (en) * | 2018-04-10 | 2019-10-22 | 福州高意光学有限公司 | A kind of high performance fiber coupling acousto-optic modulator |
-
2018
- 2018-08-21 CN CN201821350271.XU patent/CN208571218U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110364925A (en) * | 2018-04-10 | 2019-10-22 | 福州高意光学有限公司 | A kind of high performance fiber coupling acousto-optic modulator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7068890B2 (en) | Optical receiver with high dynamic range | |
| CN101222115A (en) | Semiconductor laser module | |
| CN107436437B (en) | Laser active detection device based on tunable liquid crystal variable refractive index | |
| CN109244811B (en) | A kind of anti-gauss hollow laser light source of Great Dark Spot | |
| CN104020566B (en) | The extensive laser beam array duty cycle adjustment device of two dimension | |
| CN208571218U (en) | A kind of acousto-optic Q-switching for optical fiber laser | |
| CN205004612U (en) | Brief three routes holmium laser | |
| CN205004613U (en) | Brief four ways holmium laser | |
| CN108521068B (en) | The adjusting device of laser device of adjustable wavelength, pulse width and power | |
| CN111722421A (en) | Optical isolator and laser | |
| CN207457619U (en) | A kind of device for being used to generate class bessel beam based on metal parallel flat | |
| CN203787763U (en) | External cavity laser device | |
| CN109510056B (en) | A kind of while output the hollow laser of dual wavelength | |
| CN208384176U (en) | A kind of optical transmission module and device with backlight monitoring | |
| CN208488564U (en) | A kind of on piece integration section reflector based on fractional transmission formula corner reflection microscope group | |
| CN103887707B (en) | A kind of semiconductor laser with high-power high light beam quality laser | |
| CN111505833A (en) | Multiband laser coupling technology | |
| US5946140A (en) | Fiber lens for use with a confocal lens system | |
| CN203561768U (en) | Optical collimator | |
| CN208753720U (en) | A kind of big folding angles laser resonator | |
| CN109254336A (en) | Non-completety symmetry micro medium axial cone mirror phase place | |
| US6600767B1 (en) | Free space laser with self-aligned fiber output | |
| CN111045156B (en) | Multimode optical fiber attenuator | |
| CN101183771A (en) | High power dual-cladding fiber laser end-pumped method and device | |
| CN111562686B (en) | Space light self-adaptive coupling device based on crystal electro-optic effect |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 350100 floor 5, building 19, phase II, innovation park, No. 7, middle wulongjiang Avenue, Shangjie Town, Minhou County, Fuzhou City, Fujian Province Patentee after: Fujian Haichuang Photoelectric Technology Co.,Ltd. Address before: 350005 floor 27, Chuangye building, Haixi high tech Industrial Park, high tech Zone, Minhou County, Fuzhou City, Fujian Province Patentee before: FUJIAN HAICHUANG PHOTOELECTRIC CO.,LTD. |