CN207265403U - The Raman suppression system of optical-fiber laser - Google Patents
The Raman suppression system of optical-fiber laser Download PDFInfo
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- CN207265403U CN207265403U CN201721222742.4U CN201721222742U CN207265403U CN 207265403 U CN207265403 U CN 207265403U CN 201721222742 U CN201721222742 U CN 201721222742U CN 207265403 U CN207265403 U CN 207265403U
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Abstract
A kind of Raman suppression system of optical-fiber laser is the utility model is related to, the system comprises optical fiber laser, for producing and launching laser；First Raman wave filter, is arranged at the output terminal of optical fiber laser, the Raman diffused light in laser for filtering out optical fiber laser transmitting.In having the fiber laser system of laser amplifier, the input terminal and output terminal of laser amplifier are both provided with the second Raman wave filter.The setting that the utility model passes through the first Raman wave filter and the second Raman wave filter, optical-fiber laser can be filtered out in the Raman diffused light for producing, being formed in transmission and amplification process, it is reduced as far as or even avoid Raman diffused light to be exported together with optical-fiber laser, and then reduce performance influence of the Raman diffused light on optical-fiber laser, ensure the quality and characteristic of optical-fiber laser, compared compared to Raman wave filter is not provided with, laser-quality is significantly improved.
Description
Technical field
It the utility model is related to Fiber laser technology field, the Raman suppression system of more particularly to a kind of optical-fiber laser.
Background technology
Optical-fiber laser is widely used, such as laser fiber communication, laser space remote communication, industrial shipbuilding, automobile system
Make, laser engraving laser marking laser cutting, printing roller processed, military and national defense safety, medical instrument instrument and equipment, other lasers
Pumping source etc..Optical-fiber laser output is generally divided into directly vibration output and vibration+amplification and exports two classes.Should in current optical fiber
In, no matter which kind of way of output, higher-wattage output laser all there is spectral energy concentration degree caused by Ramam effect
Phenomena such as decline, Raman wavelength red shift aggravation fibre core thermic Index distortion trigger pattern unstability, these phenomenons are serious
It has impact on the output laser-quality (including power, spectrum, beam quality etc.) of optical-fiber laser.Therefore, output laser how is improved
Quality is a technical problem to be solved urgently.
Utility model content
The purpose of this utility model is to provide a kind of Raman suppression system of optical-fiber laser, and laser matter is exported to improve
Amount.
In order to realize above-mentioned purpose of utility model, the utility model embodiment provides following technical scheme：
A kind of Raman suppression system of optical-fiber laser, including：Optical fiber laser, for producing and launching laser；First draws
Graceful wave filter, is arranged at the output terminal of optical fiber laser, the Raman diffused light in laser for filtering out optical fiber laser transmitting.
In said system, due to there is provided Raman wave filter, can filter out the laser of optical fiber laser transmitting producing and
The Raman diffused light of formation in transmitting procedure, so that lacking in laser after Raman wave filter even without Raman
Light is scattered, reducing Raman diffused light influences the characteristic of optical-fiber laser.
In said system, laser amplifier is further included, is arranged at the output terminal of the first Raman wave filter, for amplifying from drawing
The laser of graceful wave filter output.Further, the second Raman wave filter is further included, is arranged at the output terminal of laser amplifier, is used
In filter out after laser amplifier export laser in Raman diffused light.
The application scenario for arranging laser amplifier is directed to, the second Raman is set by the output terminal in laser amplifier
Wave filter, can filter out the Raman diffused light exported after laser amplifier in laser, and then can reduce in laser amplifier
During the influence of the Raman diffused light that produces to optical-fiber laser.
Further, in said system, the laser amplifier to be two or more, the quantity of the second Raman wave filter with
The quantity of laser amplifier is identical, and the output terminal of each laser amplifier sets a second Raman wave filter.Put for multistage
Big situation, by all setting the second Raman wave filter in every level-one, can farthest reduce Raman diffused light to optical fiber
The influence of laser, ensures the quality and characteristic of optical-fiber laser.
In any of the above-described system, the first Raman wave filter includes：Optic fibre input end, for receiving from optical-fiber laser
The laser exported in device；Filtering device, the drawing in laser for reflecting and/or absorbing and/or scattering optical fiber laser transmitting
Graceful scattering light；Fiber-optic output, for exporting the laser after filtered device.Further, the filtering device is filter
Wave plate or grating, or the isolator containing filter plate.
Meanwhile the embodiment of the present invention additionally provides the Raman suppression system of another optical-fiber laser, including：Optical-fiber laser
Device, for producing and launching laser；Laser amplifier, is arranged at the output terminal of optical fiber laser, for amplifying from optical-fiber laser
The laser of device output；Raman wave filter, is arranged at the output terminal of laser amplifier, is exported from laser amplifier for filtering out light
Raman diffused light in laser.
It is that Raman wave filter only is set in the output terminal of laser amplifier in the system, can effectively filters out from laser amplifier
Raman diffused light in the laser of device output.The first Raman simply is set compared to input terminal of the above-mentioned raising in laser amplifier
Wave filter, or first, second Raman wave filter is set respectively in the input terminal and output terminal of laser amplifier, Raman suppresses
Effect is not as good as above two scheme.
Compared with prior art, the utility model is by the setting of Raman wave filter, due to Raman wave filter to Raman into
The filter effect divided, can limit and filter out Raman component present in optical-fiber laser or the output of optical-fiber laser seed, so that significantly
Improve the Raman inhibition of optical-fiber laser.By the Raman suppression system, the Raman that can improve optical-fiber laser output suppresses
Than that can suppress the thermic pattern unstability in optical-fiber laser amplification process, improve the high-quality output characteristics (bag of optical-fiber laser
Include power, spectrum, beam quality etc.).
Brief description of the drawings
, below will be to required use in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
Attached drawing be briefly described, it will be appreciated that the following drawings illustrate only some embodiments of the utility model, therefore should not be by
Regard the restriction to scope as, for those of ordinary skill in the art, without creative efforts, may be used also
To obtain other relevant attached drawings according to these attached drawings.
Fig. 1 is a kind of structure diagram of the Raman suppression system for optical-fiber laser that the utility model embodiment provides.
Fig. 2 is the structure diagram of the Raman suppression system for another optical-fiber laser that the utility model embodiment provides.
Fig. 3 is the structure diagram of the Raman suppression system for another optical-fiber laser that the utility model embodiment provides.
Fig. 4 is the structure diagram of the Raman suppression system for another optical-fiber laser that the utility model embodiment provides.
Description of symbols in figure
Optical fiber laser 100；First Raman wave filter 200；Laser amplifier 300；Second Raman wave filter 400.
Embodiment
Below in conjunction with attached drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out clear
Chu, be fully described by, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole realities
Apply example.The component of the utility model embodiment being usually described and illustrated herein in the accompanying drawings can be come with a variety of configurations
Arrangement and design.Therefore, the detailed description of the embodiment of the utility model provided in the accompanying drawings is not intended to limit below
Claimed the scope of the utility model, but it is merely representative of the selected embodiment of the utility model.Based on the utility model
Embodiment, those skilled in the art's all other embodiments obtained on the premise of creative work is not made, all
Belong to the scope of the utility model protection.
It was discovered by researchers that the laser of optical fiber laser high-power output declines and declines there is spectral energy concentration degree
Obvious phenomenon, and there are pattern unstability, these phenomenons to have seriously affected the output work of optical-fiber laser for high-power output
Rate, spectrum and beam quality.In order to improve output laser-quality, more kinds of researchs of researcher are attempted, and such case occurs in discovery
The reason in part for be that optical fiber laser is influenced be subject to Raman scattering effect.Ramam effect can cause the portion of energy of laser to occur
Frequency displacement, the spectral energy concentration degree which will cause laser to export decline, aggravate fibre core thermic Index distortion initiation mould
Phenomena such as formula unstability, these phenomenons will significantly affect the generation, transmission and amplification characteristic of optical-fiber laser, particularly in optical fiber
In laser amplification procedure, even if faint seed light Raman component also can quickly be amplified, so as to more preferably significantly affect optical fiber
Laser amplifier output characteristics.In order to eliminate the influence to optical-fiber laser of Ramam effect, invention technician proposes following
Technical solution.
Referring to Fig. 1, in one embodiment of the utility model, there is provided a kind of Raman of optical-fiber laser suppresses system
System, including：
Optical fiber laser 100, for producing and launching laser；
First Raman wave filter 200, is arranged at the output terminal of optical fiber laser 100, is sent out for filtering out optical fiber laser 100
Raman diffused light in the laser penetrated.
As shown in fig. 1, solid arrow shown in figure represents optical-fiber laser, and dotted arrow shown in figure represents Raman scattering
Light, optical fiber laser 100 launch laser in be mixed with Raman diffused light, after the first Raman wave filter 200, the laser of output
In there is no Raman diffused light (this is more satisfactory state, is actually likely present minimal amount of Raman diffused light), i.e.,
One Raman wave filter 200 inhibits the output of Raman diffused light, and then has ensured the quality of the laser of output, avoids Raman and dissipates
Penetrating light influences the characteristic of laser (including power, spectrum, beam quality etc.).
In many cases, the laser of generation needs to export after amplification, therefore, referring to Fig. 2, in the utility model
In another embodiment, there is provided the optical-fiber laser Raman suppression system of another structure, including：
Optical fiber laser 100, for producing and launching laser；
First Raman wave filter 200, is arranged at the output terminal of optical fiber laser 100, is sent out for filtering out optical fiber laser 100
Raman diffused light in the laser penetrated.
Laser amplifier 300, is arranged at the output terminal of the first Raman wave filter 200, defeated from Raman wave filter for amplifying
The laser gone out.
Referring to Fig. 3, in preferred embodiments, the output terminal of laser amplifier 300 is provided with the filtering of the second Raman
Device 400, for filtering out the Raman diffused light exported after laser amplifier 300 in laser.
Ramam effect can significantly affect the generation, transmission and amplification characteristic of optical-fiber laser, particularly amplify in optical-fiber laser
During, even if faint seed light Raman component also can quickly be amplified, so that it is special to significantly affect optical-fiber laser amplification output
Property.Ideally, by that after the input terminal of laser amplifier sets Raman wave filter, can filter out and be incident to laser amplifier
The Raman diffused light in laser before device, actual conditions are probably still with the presence of very faint Raman diffused light, through too drastic
It will be exaggerated after image intensifer, (Fig. 3 is only schematically shown) as shown in Figure 3, therefore, in the output terminal of laser amplifier
After second Raman wave filter is set, you can filter out exaggerated Raman diffused light.Therefore, by laser amplifier 300
Input terminal sets the first Raman wave filter 200 and output terminal sets the second Raman wave filter 400, can not only suppress incident
The Raman diffused light in laser before to laser amplifier 300, can also suppress the Raman scattering being exaggerated in amplification process
Light output, thus the laser-quality being exaggerated after the second Raman wave filter 400 can be further improved.
It should be noted that system shown in Figure 2 is it can be appreciated that be the input terminal setting first in laser amplifier 300
Raman wave filter 200, to filter out the Raman diffused light in the laser of laser amplifier 300 to be incident to, avoids Raman diffused light
Amplified by laser amplifier 300 and strengthen influence of the Raman diffused light to output laser.Then it is at the same time in system shown in Figure 3
(first, second) Raman wave filter is respectively provided with the input terminal and output terminal of laser amplifier 300, can be further enhanced
Raman inhibition, improves output laser-quality.
The another embodiment relatively slightly poor as effect, only can also set Raman in the output terminal of laser amplifier
Wave filter, filters out the Raman diffused light exported after laser amplifier amplifies in laser.That is, the Raman of optical-fiber laser suppresses system
In system, including：Optical fiber laser, for producing and launching laser；Laser amplifier, is arranged at the output terminal of optical fiber laser,
For amplifying the laser from optical fiber laser output；Raman wave filter, is arranged at the output terminal of laser amplifier, for filtering out light
Raman diffused light from the laser of laser amplifier output.
It should be noted that in system shown in Figure 3, the output terminal of optical fiber laser 300 sets the first Raman wave filter
200, laser amplifier 300 is directly arranged at the output terminal of the first Raman wave filter 200, and the first Raman wave filter 200 is both filter
Except the Raman diffused light in the laser exported from optical fiber laser 100, and filter out before being incident to laser amplifier 300
Raman diffused light in laser.In other systems, multiple drawings can also be set between optical fiber laser and laser amplifier
Graceful wave filter, or other structures may be additionally provided between optical fiber laser and laser amplifier, but as long as in optical-fiber laser
The output terminal of device sets Raman wave filter, and the input terminal of laser amplifier sets Raman wave filter, is all the technology of substantial equivalence
Scheme, all with good Raman inhibition.
Fig. 3 show the situation of level-one amplification, is directed to the application of multistage amplification, (Fig. 4 is only used as example as shown in Figure 4
Present the situation of two-stage amplification), every level-one can be amplified and all carry out Raman suppression processing, i.e., in each laser amplifier
300 output terminal all sets a second Raman wave filter 400, often all passes through one second drawing by the amplified laser of level-one
Graceful wave filter 400, suppresses the output of Raman diffused light, suppresses by multistage Raman, in the laser finally exported almost without
Raman diffused light, laser-quality obtain maximum guarantee, are compared compared to Raman wave filter is not provided with, laser-quality is significantly carried
It is high.
It should be noted that term " first ", " second " etc. are only used for distinguishing description, and it is not intended that instruction or hint
Relative importance.The first Raman wave filter 200 described in any of the above-described embodiment and the second Raman wave filter 400 all referring to
Raman wave filter.Raman wave filter is to refer to filter out Raman diffused light, or is interpreted as suppressing the filter of Raman scattering light output
Ripple device.The mode for suppressing Raman scattering light output can be reflection, absorption or scattering, based on different modes, Raman filtering
Utensil has different structures, and the first Raman wave filter 200 and the second Raman wave filter 400 can have identical structure, also may be used
With with different structures.In the present embodiment, specifically, the first Raman wave filter 200 or the second Raman wave filter 400 include：
Optic fibre input end, for receiving the laser exported from optical fiber laser 100；
Filtering device, the Raman in laser for reflecting and/or absorbing and/or scattering the transmitting of optical fiber laser 100 dissipate
Penetrate light；Filtering device can be filter plate or grating, or the isolator containing filter plate.
Fiber-optic output, for exporting the laser after filtered device.
The input, output end of Raman wave filter all uses optical fiber structure, can match the transmission light of original optical-fiber laser
It is fine.
The above, is only specific embodiment of the present utility model, but the scope of protection of the utility model is not limited to
In this, any one skilled in the art can readily occur in change in the technical scope that the utility model discloses
Or replace, it should be covered within the scope of the utility model.
Claims (8)
- A kind of 1. Raman suppression system of optical-fiber laser, it is characterised in that including：Optical fiber laser, for producing and launching laser；First Raman wave filter, is arranged at the output terminal of optical fiber laser, in the laser for filtering out optical fiber laser transmitting Raman diffused light.
- 2. the Raman suppression system of optical-fiber laser according to claim 1, it is characterised in that laser amplifier is further included, The output terminal of the first Raman wave filter is arranged at, for amplifying the laser from the output of Raman wave filter.
- 3. the Raman suppression system of optical-fiber laser according to claim 2, it is characterised in that further include the filtering of the second Raman Device, is arranged at the output terminal of laser amplifier, for filtering out the Raman diffused light exported after laser amplifier in laser.
- 4. the Raman suppression system of optical-fiber laser according to claim 3, it is characterised in that the laser amplifier is two A or more, the quantity of the second Raman wave filter is identical with the quantity of laser amplifier, and the output terminal of each laser amplifier is set Put a second Raman wave filter.
- 5. according to the Raman suppression system of any optical-fiber lasers of claim 1-4, it is characterised in that first Raman Wave filter includes：Optic fibre input end, for receiving the laser exported from optical fiber laser；Filtering device, the Raman diffused light in laser for reflecting and/or absorbing and/or scattering optical fiber laser transmitting；Fiber-optic output, for exporting the laser after filtered device.
- 6. the Raman suppression system of optical-fiber laser according to claim 5, it is characterised in that the filtering device is filtering Piece or grating, or the isolator containing filter plate.
- 7. the Raman suppression system of optical-fiber laser according to claim 3, it is characterised in that the knot of the second Raman wave filter Structure is identical with the structure of the first Raman wave filter.
- A kind of 8. Raman suppression system of optical-fiber laser, it is characterised in that including：Optical fiber laser, for producing and launching laser；Laser amplifier, is arranged at the output terminal of optical fiber laser, for amplifying the laser from optical fiber laser output；Raman wave filter, is arranged at the output terminal of laser amplifier, for filtering out light from the laser that laser amplifier exports Raman diffused light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721222742.4U CN207265403U (en) | 2017-09-22 | 2017-09-22 | The Raman suppression system of optical-fiber laser |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721222742.4U CN207265403U (en) | 2017-09-22 | 2017-09-22 | The Raman suppression system of optical-fiber laser |
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| CN207265403U true CN207265403U (en) | 2018-04-20 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107425400A (en) * | 2017-09-22 | 2017-12-01 | 四川思创优光科技有限公司 | Raman suppression method and system for fiber laser |
| CN115000793A (en) * | 2022-08-08 | 2022-09-02 | 安徽华创鸿度光电科技有限公司 | Ultrafast solid laser for suppressing stimulated Raman scattering |
| CN115097566A (en) * | 2022-07-13 | 2022-09-23 | 中国科学院上海光学精密机械研究所 | Bend-sensitive stimulated Raman scattering suppressed ring-structured optical fiber |
-
2017
- 2017-09-22 CN CN201721222742.4U patent/CN207265403U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107425400A (en) * | 2017-09-22 | 2017-12-01 | 四川思创优光科技有限公司 | Raman suppression method and system for fiber laser |
| CN115097566A (en) * | 2022-07-13 | 2022-09-23 | 中国科学院上海光学精密机械研究所 | Bend-sensitive stimulated Raman scattering suppressed ring-structured optical fiber |
| CN115097566B (en) * | 2022-07-13 | 2024-04-12 | 中国科学院上海光学精密机械研究所 | Bend-sensitive stimulated raman scattering-inhibited ring structured optical fiber |
| CN115000793A (en) * | 2022-08-08 | 2022-09-02 | 安徽华创鸿度光电科技有限公司 | Ultrafast solid laser for suppressing stimulated Raman scattering |
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| CP01 | Change in the name or title of a patent holder |
Address after: 610000 Room 302, tower 1a, Jingrong start up hub, No. 200, Tianfu Fifth Street, high tech Zone, Chengdu, Sichuan Patentee after: Sichuan Sichuang Laser Technology Co.,Ltd. Address before: 610000 Room 302, tower 1a, Jingrong start up hub, No. 200, Tianfu Fifth Street, high tech Zone, Chengdu, Sichuan Patentee before: SICHUAN STRONG & BEST LIGHT TECHNOLOGY CO.,LTD. |
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