CN2899205Y - Dobule-wrapping optical fiber laser of adjusting pulse length acousto-opic modulated Q - Google Patents
Dobule-wrapping optical fiber laser of adjusting pulse length acousto-opic modulated Q Download PDFInfo
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- CN2899205Y CN2899205Y CN 200620042598 CN200620042598U CN2899205Y CN 2899205 Y CN2899205 Y CN 2899205Y CN 200620042598 CN200620042598 CN 200620042598 CN 200620042598 U CN200620042598 U CN 200620042598U CN 2899205 Y CN2899205 Y CN 2899205Y
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- fiber laser
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Abstract
A double-wrapping optical fiber laser of adjusting pulse length acousto-optic modulated Q comprises a resonance cavity mirror arranged on the same light axis, a double-wrapping optical fiber, a light bind adjusting coupler, an acousto-optic modulator and an output coupling mirror. The light bind adjusting coupler consists of a changeable diaphragm and a lens, and the output coupling mirror output the laser impulse width and adjusted by the changeable diaphragm. The utility model realizes the adjustability of output impulse width, and reduces the switch time selection of acousto-optic modulator according to the output impulse width to a great degree. The utility model has the advantages of simple structure, small volume, wide adjustable range of impulse width and strong practicability.
Description
Technical field
The utility model relates to acoustooptic switch and acoustic-optic Q-switched double cladded fiber laser, the adjustable acoustic-optic Q-switched double cladded fiber laser of particularly a kind of pulsewidth.
Background technology
The doubly clad optical fiber of doped with rare-earth elements has brought revolutionary variation for the lightwave technology field.The favor that the double-clad optical fiber laser of acousto-optic Q modulation is can be more compact, output laser pulse easily and effectively is subjected to people day by day.Its application need in industrial circle and various aspects is effectively controlled the output laser pulse width.
Summary of the invention
The acoustic-optic Q-switched double cladded fiber laser that provides a kind of pulsewidth adjustable is provided the purpose of this utility model, characteristics such as that this laser has is simple in structure, volume is little, the pulse duration adjustable extent is big and practical.
Technical solution of the present utility model is as follows:
The acoustic-optic Q-switched double cladded fiber laser that a kind of pulsewidth is adjustable, be characterised in that its structure comprises resonator mirror, doubly clad optical fiber, light beam regulation coupler, acousto-optic modulator, the output coupling mirror that sets gradually with optical axis, described light beam is adjusted coupler and is made up of iris diaphgram, lens, by the laser pulse width of described output coupling mirror output, regulate by iris diaphgram.
Described lens are einzel lens or set of lenses.
Described resonator mirror is plated film chamber mirror or the Fiber Bragg Grating FBG that optical maser wavelength is had high reflectance.
The logical light face of described lens, acousto-optic modulator all has the anti-reflection film to optical maser wavelength.
The iris diaphgram that described light beam is adjusted in the coupler is adjustable continuously in the light beam scope, and adjustable precision is 0.1mm.
The front/rear end of described doubly clad optical fiber has an inclination angle.
The relation of each several part is that acousto-optic modulator is when opening, laser in the resonant cavity is set out through doubly clad optical fiber by resonator mirror, pass through the light beam regulation coupling device of forming by iris diaphgram and lens then, laser is collimated in the acousto-optic modulator afterwards, arrive output coupling mirror at last, laser is through coming and going resonance gain, by output coupling mirror output pulse in the chamber.The laser pulse width of output carries out regulating and controlling by the adjusting of iris diaphgram.
Description of drawings
Fig. 1 is the structural representation of the adjustable acoustic-optic Q-switched double cladded fiber laser embodiment 1 of the utility model pulsewidth.
Fig. 2 is the structural representation of the adjustable acoustic-optic Q-switched double cladded fiber laser embodiment 2 of the utility model pulsewidth.
Embodiment
See also Fig. 1 earlier, Fig. 1 is the structural representation of the adjustable acoustic-optic Q-switched double cladded fiber laser embodiment 1 of the utility model pulsewidth.As seen from Figure 1, the acoustic-optic Q-switched double cladded fiber laser that the utility model pulsewidth is adjustable, its structure comprise with optical axis the resonant cavity completely reflecting mirror 1, doubly clad optical fiber 2, light beam regulation coupler 3, acousto-optic modulator 7, the output coupling mirror 8 that set gradually, described light beam is adjusted coupler 3 and is made up of the iris diaphgram 4 and first lens 5, by the laser pulse width of described output coupling mirror 8 outputs, regulate by iris diaphgram 4.
Consult Fig. 2, Fig. 2 is the structural representation of the adjustable acoustic-optic Q-switched double cladded fiber laser embodiment 2 of the utility model pulsewidth.As seen from the figure, embodiment 2 is that with the difference of embodiment 1 described lens are the set of lenses that formed by first lens 5 and second lens 6.
Described resonator mirror 1 is plated film chamber mirror or the Fiber Bragg Grating FBG that optical maser wavelength is had high reflectance.
The logical light face of described first lens 5, second lens 6, acousto-optic modulator 7 all has the anti-reflection film to optical maser wavelength.
The iris diaphgram 4 that described light beam is adjusted in the coupler 3 is adjustable continuously in the beam size scope, and adjustable accuracy is 0.1mm.
The front/rear end of described doubly clad optical fiber 2 has an inclination angle.
The parameter of lifting a specific embodiment below is described below:
Adopting the length of doubly clad optical fiber 2 is 7.5m, and Yb mixes in the fibre core
3+Inner cladding is of a size of 100 * 200um (NA=0.47), and core diameter is 10um (NA=0.16), acousto-optic modulator 7 operating frequency 10kHz, the aperture variable range of iris diaphgram 4 is 1-8mm, and the focal length of first lens (5), second lens (6) is respectively 10mm, 6mm.The output laser pulse width that obtains is adjustable at 60ns-120ns, if suitably select the relevant parameter coupling, pulse duration can be adjustable in a wider context.
Experiment shows, the utlity model has characteristics such as simple in structure, that volume is little, the pulse duration adjustable extent is big and practical.
Claims (6)
1, the adjustable acoustic-optic Q-switched double cladded fiber laser of a kind of pulsewidth, be characterised in that its structure comprise with optical axis the resonant cavity completely reflecting mirror (1), doubly clad optical fiber (2), light beam regulation coupler (3), acousto-optic modulator (7), the output coupling mirror (8) that set gradually, described light beam is adjusted coupler (3) and is made up of iris diaphgram (4) and lens, by the laser pulse width of described output coupling mirror (8) output, regulate by iris diaphgram (4).
2, the adjustable acoustic-optic Q-switched double cladded fiber laser of pulsewidth according to claim 1 is characterized in that described lens are einzel lens or set of lenses.
3, the adjustable acoustic-optic Q-switched double cladded fiber laser of pulsewidth according to claim 1 is characterized in that described resonator mirror (1) is plated film chamber mirror or the Fiber Bragg Grating FBG that optical maser wavelength is had high reflectance.
4, the adjustable acoustic-optic Q-switched double cladded fiber laser of pulsewidth according to claim 1, the logical light face that it is characterized in that described first lens (5), second lens (6), acousto-optic modulator (7) all has the anti-reflection film to optical maser wavelength.
5, the adjustable acoustic-optic Q-switched double cladded fiber laser of pulsewidth according to claim 1 is characterized in that described iris diaphgram (4) is adjustable continuously in the beam size scope, and adjustable precision is 0.1mm.
6,, it is characterized in that the front/rear end of described doubly clad optical fiber (2) has an inclination angle according to the adjustable acoustic-optic Q-switched double cladded fiber laser of each described pulsewidth of claim 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620042598 CN2899205Y (en) | 2006-06-09 | 2006-06-09 | Dobule-wrapping optical fiber laser of adjusting pulse length acousto-opic modulated Q |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620042598 CN2899205Y (en) | 2006-06-09 | 2006-06-09 | Dobule-wrapping optical fiber laser of adjusting pulse length acousto-opic modulated Q |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2899205Y true CN2899205Y (en) | 2007-05-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620042598 Expired - Fee Related CN2899205Y (en) | 2006-06-09 | 2006-06-09 | Dobule-wrapping optical fiber laser of adjusting pulse length acousto-opic modulated Q |
Country Status (1)
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| CN (1) | CN2899205Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100384035C (en) * | 2006-06-09 | 2008-04-23 | 中国科学院上海光学精密机械研究所 | Pulse width adjustable acoustic-optic Q-switched double cladded fiber laser |
-
2006
- 2006-06-09 CN CN 200620042598 patent/CN2899205Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100384035C (en) * | 2006-06-09 | 2008-04-23 | 中国科学院上海光学精密机械研究所 | Pulse width adjustable acoustic-optic Q-switched double cladded fiber laser |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070509 |