CN104966982A - Output-isolation-free acoustic-optic Q-switched pulse fiber laser - Google Patents
Output-isolation-free acoustic-optic Q-switched pulse fiber laser Download PDFInfo
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- CN104966982A CN104966982A CN201510473382.4A CN201510473382A CN104966982A CN 104966982 A CN104966982 A CN 104966982A CN 201510473382 A CN201510473382 A CN 201510473382A CN 104966982 A CN104966982 A CN 104966982A
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Abstract
The invention discloses an output-isolation-free acoustic-optic Q-switched pulse fiber laser. The output-isolation-free acoustic-optic Q-switched pulse fiber laser comprises a seed source oscillation laser path and an amplifying laser path. The seed source oscillation laser path comprises a high-reflection grating, a ytterbium-doped optical fiber, a low-reflection grating and an acoustic-optic Q switch. The high-reflection grating, the ytterbium-doped optical fiber and the low-reflection grating form a linear resonant cavity to be used for generating laser oscillation. The acoustic-optic Q switch is located inside the linear resonant cavity. The output of the low-reflection grating is connected with the amplifying laser path. The output-isolation-free acoustic-optic Q-switched pulse fiber laser is characterized in that a delay optical fiber is additionally arranged between the seed source oscillation laser path and the amplifying laser path, and the length of the delay optical fiber allows the acoustic-optic Q switch to be in the closed state at the time point when returned lasers pass through the delay optical fiber to enter the acoustic-optic Q switch.
Description
Technical field
The present invention relates to pulse optical fiber, specifically refer to the acousto-optic Q modulation pulse optical fiber of a kind of no-output isolation.
Background technology
Pulse optical fiber light path part is made up of two parts: Part I: seed source vibration (MO); Part II: amplify (PA).The pulsed light that laser seed source produces exports after amplifying, and wherein back light will along the reverse transmission of original optical path, and exaggerated equally after amplifying light path, therefore back light just have passed through two-stage amplification, has higher peak power.The fibre-optic mode field diameter adopted due to seed source is general less, holds the pulse laser that can't stand high peak power, when the peak power of back light exceedes the ability to bear of seed source optical fiber, burning of seed source optical fiber will occur.
At present, in order to prevent back light in laser works process on the impact of prime light path, to be usually all connected to laser isolator at the output of laser, back light will partly be isolated by during laser isolator.The segregate how many isolation with isolator of back light has much relations, and isolation is good, and back light is just weak, otherwise back light is just strong.Once the isolation index of laser isolator goes wrong, burning of prime light path can be caused equally.
Summary of the invention
For prior art above shortcomings, the object of the present invention is to provide a kind of pulse optical fiber, this pulse optical fiber fundamentally can solve the impact of back light on prime light path, and without exporting isolator specially, cost is lower.
To achieve these goals, the technical solution used in the present invention is such:
A kind of acousto-optic Q modulation pulse optical fiber of no-output isolation, comprise seed source vibration light path and amplify light path, seed source vibration light path comprises high reflective grid, Yb dosed optical fiber, low reflective grid and acoustooptic Q-switching, high reflective grid, Yb dosed optical fiber and low reflective grid form linear resonant cavity, in order to produce laser generation, it is inner that acoustooptic Q-switching is positioned at this linear resonant cavity, the output of low reflective grid connects amplification light path, it is characterized in that: between seed source vibration light path and amplification light path, have additional one section postpone optical fiber, the length postponing optical fiber makes back light acoustooptic Q-switching on the time point entering acoustooptic Q-switching through postponing optical fiber be in closed condition.
The present invention utilizes optical fiber acoustooptic Q-switching as isolated component, between seed source vibration light path and amplification light path, add one section postpone optical fiber, make back light through delay optical fiber laggard enter acoustooptic Q-switching time point on acoustooptic Q-switching be in closed condition, like this, back light is just blocked by acoustooptic Q-switching, ensure that the steady operation of seed source.
Simultaneously, the present invention can remove the laser isolator that output is arranged, only retain and export collimation camera lens, because the cost of laser isolator is higher, and volume and weight is comparatively large, and to postpone optical fiber be ordinary optic fibre, and cost is very low, therefore not only reduce product cost, and make laser delivery more light small and exquisite.
Accompanying drawing explanation
Fig. 1-seed source oscillation light line structure schematic diagram of the present invention.
Fig. 2-the present invention amplifies light channel structure schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
See Fig. 1 and Fig. 2, upper as can be seen from figure, the acousto-optic Q modulation pulse optical fiber of no-output isolation of the present invention, comprise seed source vibration light path and amplify light path, seed source vibration light path comprises high reflective grid, Yb dosed optical fiber, low reflective grid and acoustooptic Q-switching, and high reflective grid, Yb dosed optical fiber and low reflective grid form linear resonant cavity, in order to produce laser generation, it is inner that acoustooptic Q-switching is positioned at this linear resonant cavity, and the output of low reflective grid connects amplification light path.Its improvement is, between seed source vibration light path and amplification light path, have additional one section postpone optical fiber, postpone optical fiber and return for extending back light the time arriving acoustooptic Q-switching, the length postponing optical fiber makes back light acoustooptic Q-switching on the time point entering acoustooptic Q-switching through postponing optical fiber be in closed condition.Upper as can be seen from figure, actual is have additional this delay optical fiber between the low reflective grid and amplification light path of seed source vibration light path.
The present invention utilizes optical fiber acoustooptic Q-switching as isolated component, between seed source vibration light path and amplification light path, add one section postpone optical fiber, make back light through delay optical fiber laggard enter acoustooptic Q-switching time point on acoustooptic Q-switching be in closed condition, like this, back light is just blocked by acoustooptic Q-switching, ensure that the steady operation of seed source.
The basic functional principle of this structure forms a linear resonant cavity by the reflective grid of height, Yb dosed optical fiber and low reflective grid, and in order to produce laser generation, acoustooptic Q-switching (i.e. optical fiber acousto-optic modulator) is positioned at the inside of this resonant cavity.Acoustooptic Q-switching close state under, set up very strong laser generation in resonant cavity, there is very high Q value, laser not by.Under acoustooptic Q-switching opening, the laser energy of storage in resonant cavity exports from low reflective grid end, thus the Q impulse realizing laser exports.
Adopt the program can remove the laser isolator of output setting, only retain and export collimation camera lens, because the cost of laser isolator is higher, and volume and weight is larger, and to postpone optical fiber be ordinary optic fibre, cost is very low, therefore not only reduces product cost, and makes laser delivery more light small and exquisite.
What finally illustrate is, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not departing from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (1)
1. the acousto-optic Q modulation pulse optical fiber of a no-output isolation, comprise seed source vibration light path and amplify light path, seed source vibration light path comprises high reflective grid, Yb dosed optical fiber, low reflective grid and acoustooptic Q-switching, high reflective grid, Yb dosed optical fiber and low reflective grid form linear resonant cavity, in order to produce laser generation, it is inner that acoustooptic Q-switching is positioned at this linear resonant cavity, the output of low reflective grid connects amplification light path, it is characterized in that: between seed source vibration light path and amplification light path, have additional one section postpone optical fiber, the length postponing optical fiber makes back light acoustooptic Q-switching on the time point entering acoustooptic Q-switching through postponing optical fiber be in closed condition.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510473382.4A CN104966982A (en) | 2015-08-05 | 2015-08-05 | Output-isolation-free acoustic-optic Q-switched pulse fiber laser |
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| CN201510473382.4A CN104966982A (en) | 2015-08-05 | 2015-08-05 | Output-isolation-free acoustic-optic Q-switched pulse fiber laser |
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| CN104966982A true CN104966982A (en) | 2015-10-07 |
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| CN201510473382.4A Pending CN104966982A (en) | 2015-08-05 | 2015-08-05 | Output-isolation-free acoustic-optic Q-switched pulse fiber laser |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106785837A (en) * | 2016-12-15 | 2017-05-31 | 吉林大学 | One kind eliminates the Q impulse optical fiber laser output rough control method of pulse |
| CN108098148A (en) * | 2017-12-28 | 2018-06-01 | 北京工业大学 | A kind of laser cleaner |
| CN111106513A (en) * | 2019-12-12 | 2020-05-05 | 北京航天控制仪器研究所 | Narrow nanosecond initiative Q-switched fiber laser |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203631970U (en) * | 2013-10-09 | 2014-06-04 | 深圳市创鑫激光技术有限公司 | High-power Q-switched pulse optical fiber laser |
| CN104733988A (en) * | 2015-03-31 | 2015-06-24 | 深圳市创鑫激光股份有限公司 | MOPA pulse fiber laser based on pulse drive superluminescent diodes |
| CN204441699U (en) * | 2015-02-16 | 2015-07-01 | 深圳市欧凌镭射科技有限公司 | A kind of pulse optical fiber |
-
2015
- 2015-08-05 CN CN201510473382.4A patent/CN104966982A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203631970U (en) * | 2013-10-09 | 2014-06-04 | 深圳市创鑫激光技术有限公司 | High-power Q-switched pulse optical fiber laser |
| CN204441699U (en) * | 2015-02-16 | 2015-07-01 | 深圳市欧凌镭射科技有限公司 | A kind of pulse optical fiber |
| CN104733988A (en) * | 2015-03-31 | 2015-06-24 | 深圳市创鑫激光股份有限公司 | MOPA pulse fiber laser based on pulse drive superluminescent diodes |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106785837A (en) * | 2016-12-15 | 2017-05-31 | 吉林大学 | One kind eliminates the Q impulse optical fiber laser output rough control method of pulse |
| CN108098148A (en) * | 2017-12-28 | 2018-06-01 | 北京工业大学 | A kind of laser cleaner |
| CN111106513A (en) * | 2019-12-12 | 2020-05-05 | 北京航天控制仪器研究所 | Narrow nanosecond initiative Q-switched fiber laser |
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Application publication date: 20151007 |
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