CN204349201U - The image intensifer of low self-sustained emission - Google Patents
The image intensifer of low self-sustained emission Download PDFInfo
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- CN204349201U CN204349201U CN201520084658.5U CN201520084658U CN204349201U CN 204349201 U CN204349201 U CN 204349201U CN 201520084658 U CN201520084658 U CN 201520084658U CN 204349201 U CN204349201 U CN 204349201U
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Abstract
The utility model relates to a kind of image intensifer of low self-sustained emission, comprises the flashlight driver module of the flashlight generation module for generation of flashlight, the optical isolator module for the protection of flashlight generation module, drive singal light generation module; Carry out at least one-level Optical Amplifier Unit of light amplification, amplifying unit comprises flashlight for flashlight and pump light being combined into a branch of Shu Guang of conjunction and pumping combiner module, be used for absorbing the pump light that closes Shu Guangzhong and the Active Optical Fiber amplification module of amplifying signal light, be used for the flashlight after amplifying is carried out to the optical modulator module of high-speed switch and isolation filter, drives the light modulation driver module of optical modulator module, and flashlight driver module and optical modulator module drive synchronization module synchronously to drive by flashlight and light modulation.The utility model can reduce the transmission of ASE greatly, has completely cut off the amplifier chain of front stage in time simultaneously, has avoided the generation due to return pulsed Self-pulsing instability.
Description
Technical field
The utility model relates to a kind of structure of image intensifer.
Background technology
Along with the development of laser processing technology, increasing traditional handicraft is replaced by laser, and new processing technology and material for laser light device it is also proposed higher requirement, needs higher peak power and larger pulse energy.Under the constraint of controlling cost, require not increase average power, the method for this reason taked reduces pulse duration or reduces repetition rate, namely reduces duty ratio.Under the condition of continuous pumping, lower duty ratio easily excites Self-pulsing instability in high-gain amplifier, comprises in the self-oscillation and high gain medium caused because ASE is excessive being excited the self mode locking effect that saturated absorption brings.
Summary of the invention
The purpose of this utility model be to provide a kind of the first pulse of guarantee can while can ensure lower ASE, and the image intensifer of the low self-sustained emission realizing higher peak power and larger pulse energy can be ensured.
For achieving the above object, the technical solution adopted in the utility model is:
An image intensifer for low self-sustained emission, comprise the flashlight generation module for generation of flashlight, the optical isolator module for the protection of described flashlight generation module, drive described in the flashlight driver module of flashlight generation module, carry out at least one-level Optical Amplifier Unit of light amplification, described amplifying unit comprises for described flashlight and pump light being combined into a branch of flashlight and pumping combiner module of closing Shu Guang, for absorbing the pump light of described conjunction Shu Guangzhong and the Active Optical Fiber amplification module of flashlight described in amplifying, for carrying out the optical modulator module of high-speed switch and isolation filter to the flashlight after amplification, the light modulation driver module of the optical modulator module described in driving, described flashlight driver module and described optical modulator module drive synchronization module synchronously to drive by flashlight and light modulation.
Described flashlight generation module is the continous way flashlight generation module that the pulsed signal light generation module that can produce pulsed light maybe can produce continuous light.
Described flashlight and pumping combiner module adopt the coupler of optical fiber type bundling device and wavelength division multiplexer or use Free-space coupling.
Described Active Optical Fiber amplification module adopts single covering Active Optical Fiber, double-cladding active optical fiber or is mixed with the booster (rod) of rare earth element.
Described optical modulator module is mechanical optical switch, electronic type optical switch maybe can to the device of the high destructive threshold value based on acoustooptical effect or electro optic effect that light signal is modulated.
Because technique scheme is used, the utility model compared with prior art has following advantages: image intensifer of the present utility model use can the optical modulator module of isolation filter after plus and blowup, greatly can reduce the transmission of ASE, completely cut off the amplifier chain of front stage in time simultaneously, avoid the generation due to return pulsed Self-pulsing instability.
Accompanying drawing explanation
Accompanying drawing 1 is the schematic diagram of the image intensifer of low self-sustained emission of the present utility model.
In above accompanying drawing: 1, flashlight generation module; 2, optical isolator module; 3, flashlight and pumping combiner module; 4, Active Optical Fiber amplification module; 5, optical modulator module; 6, flashlight driver module; 7, light modulation driver module; 8, flashlight and light modulation drive synchronization module.
Embodiment
Below in conjunction with embodiment shown in the drawings, the utility model is further described.
Embodiment one: shown in accompanying drawing 1, an image intensifer for low self-sustained emission, comprises light signal generation module, optical isolator module 2, flashlight and pumping combiner module 3, Active Optical Fiber amplification module 4, optical modulator module 5, flashlight driver module 6, light modulation driver module 7 and flashlight and light modulation drives synchronization module 8.
Light signal generation module is for generation of flashlight, and it both can be the pulsed signal light generation module 1 that can produce pulsed light, also can be the continous way flashlight generation module 1 that can produce continuous light.This flashlight generation module 1 is driven by flashlight driver module 6.After optical isolator module 2 is connected to light signal generation module, can not be damaged by the back light of module below for the protection of flashlight generation module 1.A flashlight and pumping combiner module 3, Active Optical Fiber amplification module 4, optical modulator module 5 form one-level Optical Amplifier Unit after being connected to light isolation module in turn.Wherein, flashlight and pumping combiner module 3 a branch ofly close Shu Guang for flashlight and pump light being combined into, its coupler that can adopt optical fiber type bundling device and wavelength division multiplexer or use Free-space coupling; Active Optical Fiber amplification module 4 is for absorbing the pump light and amplifying signal light that close Shu Guangzhong, its booster (rod) that can adopt single covering Active Optical Fiber, double-cladding active optical fiber or be mixed with rare earth element; Optical modulator module 5 is for carrying out high-speed switch and isolation filter to the flashlight after amplifying, and it can adopt mechanical optical switch, electronic type optical switch maybe can to the device of the high destructive threshold value based on acoustooptical effect or electro optic effect that light signal is modulated.Flashlight can with exporting when opening for optical modulator module 5, and when closedown, light path is cut off, and without any light output, thus realizes low light leak even zero light leak.Optical Amplifier Unit also comprises light modulation driver module 7, and it is for driving optical modulator module 5.This light modulation driver module 7 and flashlight driver module 6 drive synchronization module 8 to carry out strict synchronous driving by flashlight and light modulation simultaneously, thus realize accurate phase control, flashlight and light modulation drive the time delay of synchronization module 8 and pulse duration all can regulate, to mate different light channel structures and light path time delay.
The image intensifer of the low self-sustained emission of above-described embodiment has one-level Optical Amplifier Unit, and the image intensifer of this low self-sustained emission can also adopt multi-stage light amplifying unit, namely flashlight and pumping combiner module 3, Active Optical Fiber amplification module 4, this three part of optical modulator module 5 are reused, after rear class Optical Amplifier Unit is connected to prime Optical Amplifier Unit, thus form multi-stage light amplification, make the flashlight of prime carry out next stage amplification after optical modulator module 5.When adopting multi-stage light amplifying unit, the isolator used in usual Active Optical Fiber amplification module 4 no longer needs, the actual function that assume responsibility for isolator of optical modulator module 5; But with common isolator unlike, optical modulator module 5 not only isolated backlight, and the ASE of isolated forward.It is inner that this two-way isolation ensures that ASE is only limitted to each amplifying stage, and can not in inter-stage transmission, and this largest source that Self-pulsing instability occurs in common MOPA structured optical fiber amplifier just.This design ensure that the appearance suppressing giant pulse is to greatest extent for the destruction of fiber laser.Further, optical modulator module 5 by the modulation of electricity, can also realize the shaping for light pulse, is conducive to design, control impuls shape, combines with theoretical modeling and experiment test, obtains arbitrary last output pulse waveform.This is conducive to controlling the non-linear of optical fiber laser amplifier, reduces the impact of wave distortion, reaches higher power extraction efficiency, obtain larger output pulse energy.Further, optical modulator module 5 can also pass through the ASE in asynchronous modulation, difference frequency isolated controlling single-stage, reduces the ASE of prime thus reduces the ASE leakage of modulating in window, the fail safe that the system that realizes is larger.Such as, the prime more weak at signal light intensity uses higher repetition rate (such as, 1MHz or higher), and average power higher like this and larger duty ratio inhibit the growth of ASE greatly; And in the stronger rear class of flashlight, flashlight is enough strong, be enough to the growth suppressing ASE, lower repetition rate can not cause the generation of giant pulse, at this moment pulse repetition frequency is reduced (such as with optical modulator module 5, be reduced to 10-100KHz), thus obtain the peak power of higher enlargement ratio and Geng Gao.Like this, repetition rate reduces successively, and peak power increases gradually, obtains higher enlargement ratio, and ASE can not be caused to increase the Self-pulsing instability brought.
In the image intensifer of this low self-sustained emission, propose a kind of new thought, before bias light and ASE are fully amplified, filter them in time, avoid exciting of Self-pulsing instability.With the double pulse modulation method of seed source in the patent " a kind of Picopulse optical fiber laser and pulse generation method thereof " and external modulator unlike, the time filtering switch module of the synchronization delay modulation that the utility model uses is after plus and blowup, therefore the transmission of ASE can greatly be reduced, simultaneously, completely cut off the amplifier chain of front stage in time, avoid the generation due to return pulsed Self-pulsing instability (Self-Pulsing Instability).The image intensifer of this low self-sustained emission the first pulse of guarantee can while can ensure lower ASE, and can ensure to realize higher peak power and larger pulse energy, thus ensure that the process velocity of system.
Above-described embodiment, only for technical conceive of the present utility model and feature are described, its object is to person skilled in the art can be understood content of the present utility model and implement according to this, can not limit protection range of the present utility model with this.All equivalences done according to the utility model Spirit Essence change or modify, and all should be encompassed within protection range of the present utility model.
Claims (5)
1. an image intensifer for low self-sustained emission, is characterized in that: it comprise the flashlight generation module (1) for generation of flashlight, the optical isolator module (2) for the protection of described flashlight generation module, drive described in the flashlight driver module (6) of flashlight generation module (1), carry out at least one-level Optical Amplifier Unit of light amplification, described amplifying unit comprises for described flashlight and pump light being combined into a branch of flashlight and pumping combiner module (3) of closing Shu Guang, for absorbing the pump light of described conjunction Shu Guangzhong and the Active Optical Fiber amplification module (4) of flashlight described in amplifying, for carrying out the optical modulator module (5) of high-speed switch and isolation filter to the flashlight after amplification, the light modulation driver module (7) of the optical modulator module (5) described in driving, described flashlight driver module (6) and described optical modulator module (7) drive synchronization module (8) synchronously to drive by flashlight and light modulation.
2. the image intensifer of low self-sustained emission according to claim 1, is characterized in that: described flashlight generation module (1) is the continous way flashlight generation module that the pulsed signal light generation module that can produce pulsed light maybe can produce continuous light.
3. the image intensifer of low self-sustained emission according to claim 1, is characterized in that: described flashlight and pumping combiner module (3) adopt the coupler of optical fiber type bundling device and wavelength division multiplexer or use Free-space coupling.
4. the image intensifer of low self-sustained emission according to claim 1, is characterized in that: described Active Optical Fiber amplification module (4) adopts single covering Active Optical Fiber, double-cladding active optical fiber or is mixed with the booster (rod) of rare earth element.
5. the image intensifer of low self-sustained emission according to claim 1, is characterized in that: described optical modulator module (5) is mechanical optical switch, electronic type optical switch maybe can to the device of the high destructive threshold value based on acoustooptical effect or electro optic effect that light signal is modulated.
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| CN201520084658.5U CN204349201U (en) | 2015-02-06 | 2015-02-06 | The image intensifer of low self-sustained emission |
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| CN201520084658.5U CN204349201U (en) | 2015-02-06 | 2015-02-06 | The image intensifer of low self-sustained emission |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109149344A (en) * | 2018-08-14 | 2019-01-04 | 杭州镭克普光电技术有限公司 | A kind of system of impulsive synchronization that realizing the output of ultrashort pulse medium-wave infrared laser using laser difference frequency |
| CN110081916A (en) * | 2019-03-25 | 2019-08-02 | 中国船舶重工集团公司第七一五研究所 | The inhibition device and method of noise of optical amplifier in a kind of fiber optic sensor system |
| CN110120624A (en) * | 2018-02-06 | 2019-08-13 | 朗美通经营有限责任公司 | Integral component for optical amplifier |
| CN112490840A (en) * | 2020-11-26 | 2021-03-12 | 浙江热刺激光技术有限公司 | System and method for inhibiting continuous components in laser pulse traveling wave amplification process |
-
2015
- 2015-02-06 CN CN201520084658.5U patent/CN204349201U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110120624A (en) * | 2018-02-06 | 2019-08-13 | 朗美通经营有限责任公司 | Integral component for optical amplifier |
| CN109149344A (en) * | 2018-08-14 | 2019-01-04 | 杭州镭克普光电技术有限公司 | A kind of system of impulsive synchronization that realizing the output of ultrashort pulse medium-wave infrared laser using laser difference frequency |
| CN110081916A (en) * | 2019-03-25 | 2019-08-02 | 中国船舶重工集团公司第七一五研究所 | The inhibition device and method of noise of optical amplifier in a kind of fiber optic sensor system |
| CN112490840A (en) * | 2020-11-26 | 2021-03-12 | 浙江热刺激光技术有限公司 | System and method for inhibiting continuous components in laser pulse traveling wave amplification process |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150520 Termination date: 20170206 |