CN108390239A - The MOPA optical fiber lasers and modulator approach of shaping pulse based on Electro-optical Modulation - Google Patents
The MOPA optical fiber lasers and modulator approach of shaping pulse based on Electro-optical Modulation Download PDFInfo
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- CN108390239A CN108390239A CN201810475371.3A CN201810475371A CN108390239A CN 108390239 A CN108390239 A CN 108390239A CN 201810475371 A CN201810475371 A CN 201810475371A CN 108390239 A CN108390239 A CN 108390239A
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- isolator
- optical fiber
- input terminal
- rear class
- prime
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/005—Optical devices external to the laser cavity, specially adapted for lasers, e.g. for homogenisation of the beam or for manipulating laser pulses, e.g. pulse shaping
- H01S3/0057—Temporal shaping, e.g. pulse compression, frequency chirping
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
- H01S3/06716—Fibre compositions or doping with active elements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06754—Fibre amplifiers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/10007—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers
- H01S3/10023—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers by functional association of additional optical elements, e.g. filters, gratings, reflectors
Abstract
The invention discloses a kind of MOPA optical fiber lasers of shaping pulse based on Electro-optical Modulation and modulator approach, the MOPA optical fiber lasers of the shaping pulse based on Electro-optical Modulation include for being emitted the seed light source of seed light, the first isolator, filter, electrooptic modulator, preamplifier system, the second isolator, main amplification system, output isolator；The input terminal of first isolator is connected with the seed light source；The input terminal of filter is connected with the output end of the first isolator；The input terminal of electrooptic modulator is connected with the output end of the filter；Preamplifier system is connected with the output end of electrooptic modulator；The input terminal of second isolator is connected with the preamplifier system；Main amplification system is connected with the output end of the second isolator；It exports input terminal and the main amplification system of isolator and is connected.The present invention has the function of waveform optimization, is compensated to signal waveform by electric light adjuster, output waveform is made to be improved, and then can improve output laser single-pulse energy.
Description
Technical field
The present invention relates to a kind of MOPA optical fiber lasers of shaping pulse based on Electro-optical Modulation and modulator approaches, belong to sharp
Light technical field.
Background technology
Currently, cladding pump technology is that occur in the late 1980s, the appearance of this technology makes optical-fiber laser
The power level of device has huge raising, and continuous laser power highest has reached 10kW (IPG companies) at present.Using cladding pump
The optical fiber laser of technological maheup, it is compact-sized, efficient, can be widely applied to medicine, laser ranging, remote sensing technology, work
Industry processing and parametric oscillation etc. especially require the various fields using power light source, so optical fiber laser is several recently
Year gains great popularity.
For many applications it is desirable that there is the light-pulse generator of high-peak power, MOPA technologies are to obtain high single pulse energy
The effective ways of amount, high-peak power.Common MOPA technologies are in amplification process, since pulse reaches the reversion accumulated before
The more pulse front edge of particle is amplified first, so gain is larger.Since spread speed is fast in amplifying fiber for pulse, consumption
The reversion particle fallen is not replenished in time, so the gain relative to pulse front edge, the gain of pulse back edge is with regard to small.Due to
The front and back difference along gain, the waveform that may result in pulse signal are distorted, as shown in Figure 1.And the degree of wave distortion
Related with gain amplifier and pulse width, gain is bigger, and distortion is bigger, as shown in Figure 2.Due to optical fiber non-linear threshold compared with
It is low, under the conditions of identical peak power and pulsewidth, if distortion is larger, the raising of single pulse energy will be seriously limited, into
And treatment effeciency and effect of the laser to material are influenced, such as away rust by laser and laser welding.
Invention content
The technical problem to be solved by the present invention is to overcome the deficiencies of existing technologies, a kind of arteries and veins based on Electro-optical Modulation is provided
The MOPA optical fiber lasers of shaping are rushed, it has the function of waveform optimization, compensates, makes to signal waveform by electric light adjuster
Output waveform is improved, and then can improve output laser single-pulse energy.
In order to solve the above-mentioned technical problem, the technical scheme is that：A kind of shaping pulse based on Electro-optical Modulation
MOPA optical fiber lasers, it includes：
Seed light source for being emitted seed light；
The input terminal of first isolator, first isolator is connected with the seed light source；
Filter, the input terminal of the filter are connected with the output end of first isolator；
Electrooptic modulator, the input terminal of the electrooptic modulator are connected with the output end of the filter；
Preamplifier system, the preamplifier system are connected with the output end of the electrooptic modulator；
The input terminal of second isolator, second isolator is connected with the preamplifier system；
Main amplification system, the main amplification system are connected with the output end of second isolator；
Export isolator, input terminal and the main amplification system of the output isolator be connected；
Wherein, the seed light of seed light source outgoing enters electrooptic modulator after the first isolator and filter, described
After electrooptic modulator compensates shaping to the waveform of the seed light of input, pre-amplification processing is carried out by preamplifier system, then
After the second isolator, amplified again by main amplification system, finally by output isolator output.
Further, the electrooptic modulator is adjusted the transmitance for entering its light according to external electric signal.
Further provide a kind of concrete structure of preamplifier system, the preamplifier system include prime Active Optical Fiber,
One end of prime bundling device and prime pumping source, the prime Active Optical Fiber is connected with the output end of the electrooptic modulator, institute
The input terminal for stating prime bundling device is connected with the other end of the prime Active Optical Fiber, the output end of the prime bundling device and institute
The input terminal for stating the second isolator is connected, and the pumping input terminal of the prime bundling device is connected with prime pumping source.
Further, the prime pumping source is provided with 1, and the prime bundling device has 1 pumping input terminal.
Further, the prime Active Optical Fiber is ytterbium-doped double-cladded-layer Active Optical Fiber.
Further provide a kind of concrete structure of main amplification system, the main amplification system include rear class Active Optical Fiber,
Rear class bundling device and rear class pumping source, one end of the rear class Active Optical Fiber are connected with the output end of second isolator, institute
The input terminal for stating rear class bundling device is connected with the other end of the rear class Active Optical Fiber, the output end of the rear class bundling device and institute
The input terminal for stating output isolator is connected, and the pumping input terminal of the rear class bundling device is connected with corresponding rear class pumping source.
Further, there are two the pumping input terminal settings of the rear class bundling device, and rear class pumping source is also equipped with two
A, respectively the first rear class pumping source and the second rear class pumping source, each of rear class bundling device pumping input terminal are correspondingly connected with one
A rear class pumping source.
Further, the rear class Active Optical Fiber is ytterbium-doped double-cladded-layer Active Optical Fiber.
Further, first isolator is bipolar separators；Second isolator isolator between grade.
The present invention also provides a kind of modulator approach of the MOPA optical fiber lasers of the shaping pulse based on Electro-optical Modulation, sides
Contain in the step of method：
One electrooptic modulator is set, the signal for inputting its pulsed light is modulated by electrooptic modulator, makes pulse
The pulse front edge intensity of light is less than pulse back edge intensity.
After using above-mentioned technical proposal, present invention uses electrooptic modulator compensation mechanism, do not need additional complicated dress
It sets, has both saved production cost, in turn simplify structure.This compensation mechanism uses electrooptic modulator, is adjusted to the signal of input
System makes pulse front edge intensity be less than pulse back edge, in this way in amplification although pulse front edge gain is big, since signal is strong
Spend it is small, so output will not be too high, pulse back edge then on the contrary, last total output pulse is still a square,
So can distort to amplification generates amendment.
Description of the drawings
Fig. 1 (a) is the schematic diagram of input waveform in the prior art；
Fig. 1 (b) is the schematic diagram of output waveform in the prior art；
Fig. 2 is the schematic diagram of the output waveform under the conditions of different gains；
Fig. 3 is the connection diagram of the MOPA optical fiber lasers of the shaping pulse based on Electro-optical Modulation of the present invention.
Specific implementation mode
In order that the present invention can be more clearly and readily understood, right below according to specific embodiment and in conjunction with attached drawing
The present invention is described in further detail.
As shown in figure 3, a kind of MOPA optical fiber lasers of the shaping pulse based on Electro-optical Modulation, it includes：
Seed light source 1 for being emitted seed light；In the present embodiment, seed light source 1 is semiconductor seed source；
The input terminal of first isolator 2, first isolator 2 is connected with the seed light source 1；
Filter 3, the input terminal of the filter 3 are connected with the output end of first isolator 2；
Electrooptic modulator 4, the input terminal of the electrooptic modulator 4 are connected with the output end of the filter 3；
Preamplifier system, the preamplifier system are connected with the output end of the electrooptic modulator 4；
The input terminal of second isolator 8, second isolator 8 is connected with the preamplifier system；
Main amplification system, the main amplification system are connected with the output end of second isolator 8；
Export isolator 13, input terminal and the main amplification system of the output isolator 13 be connected；
Wherein, the seed light that seed light source 1 is emitted enters electrooptic modulator 4 after the first isolator 2 and filter 3,
After the electrooptic modulator 4 compensates shaping to the waveform of the seed light of input, carried out at pre-amplification by preamplifier system
Reason, after the second isolator 8, is amplified again by main amplification system, is exported finally by output isolator 13.
As shown in figure 3, the electrooptic modulator 4 adjusts the transmitance for entering its light according to external electric signal
Section.
As shown in figure 3, the preamplifier system includes prime Active Optical Fiber 5, prime bundling device 6 and prime pumping source 7, institute
The one end for stating prime Active Optical Fiber 5 is connected with the output end of the electrooptic modulator 4, the input terminal of the prime bundling device 6 with
The other end of the prime Active Optical Fiber 5 is connected, the input of the output end of the prime bundling device 6 and second isolator 8
End is connected, and the output end of the prime bundling device 6 and the input terminal of second isolator 8 can be connected by way of welding
It connects, the pumping input terminal of the prime bundling device 6 is connected with prime pumping source 7.
As shown in figure 3, the prime pumping source 7 is provided with 1, the prime bundling device 6 has 1 pumping input terminal.
The prime Active Optical Fiber 5 is ytterbium-doped double-cladded-layer Active Optical Fiber (10/125).
As shown in figure 3, the main amplification system includes rear class Active Optical Fiber 9, rear class bundling device 10 and rear class pumping source, institute
The one end for stating rear class Active Optical Fiber 9 is connected with the output end of second isolator 8, the input terminal of the rear class bundling device 10 with
The other end of the rear class Active Optical Fiber 9 is connected, and the output end of the rear class bundling device 10 is defeated with the output isolator 13
Enter end to be connected, the pumping input terminal of the rear class bundling device 10 is connected with corresponding rear class pumping source.
As shown in figure 3, there are two the pumping input terminal settings of the rear class bundling device 10, and rear class pumping source is also provided with
There are two, respectively the first rear class pumping source 11 and the second rear class pumping source 12, each of rear class bundling device pump input terminal pair
A rear class pumping source should be connected.
The rear class Active Optical Fiber 9 is ytterbium-doped double-cladded-layer Active Optical Fiber (20/130).
First isolator 2 is bipolar separators；The isolator between grade of second isolator 8.
Contain in a kind of the step of modulator approach of the MOPA optical fiber lasers of the shaping pulse based on Electro-optical Modulation, method
Have：
One electrooptic modulator 4 is set, the signal for inputting its pulsed light is modulated by electrooptic modulator 4, makes arteries and veins
The pulse front edge intensity washed off is less than pulse back edge intensity.
Working principle of the present invention is as follows：
It is square wave that seed light source 1, which is emitted waveform, after bipolar separators and filter 3, into electrooptic modulator 4,
The transmitance of electrooptic modulator 4 is adjusted in external electric signal, and then to optical pulse waveform shaping, the benefit needed for formation system
Waveform is repaid, the pre-amplification system that the light pulse after shaping is made up of prime Active Optical Fiber 5, prime bundling device 6 and prime pumping source 7
After the main amplification system amplification of system and rear class Active Optical Fiber 9, rear class bundling device 10 and rear class pumping source composition, it is isolated by exporting
Device 13 exports.
Particular embodiments described above, pair present invention solves the technical problem that, technical solution and advantageous effect carry out
It is further described, it should be understood that the above is only a specific embodiment of the present invention, is not limited to this
Invention, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in this hair
Within bright protection domain.
Claims (10)
1. a kind of MOPA optical fiber lasers of the shaping pulse based on Electro-optical Modulation, which is characterized in that it includes：
Seed light source (1) for being emitted seed light；
The input terminal of first isolator (2), first isolator (2) is connected with the seed light source (1)；
Filter (3), the input terminal of the filter (3) are connected with the output end of first isolator (2)；
The input terminal of electrooptic modulator (4), the electrooptic modulator (4) is connected with the output end of the filter (3)；
Preamplifier system, the preamplifier system are connected with the output end of the electrooptic modulator (4)；
The input terminal of second isolator (8), second isolator (8) is connected with the preamplifier system；
Main amplification system, the main amplification system are connected with the output end of second isolator (8)；
Export isolator (13), input terminal and the main amplification system of the output isolator (13) be connected；
Wherein, the seed light of seed light source (1) outgoing enters electrooptic modulator after the first isolator (2) and filter (3)
(4), it after the electrooptic modulator (4) compensates shaping to the waveform of the seed light of input, is carried out by preamplifier system pre-
Enhanced processing is amplified after the second isolator (8) by main amplification system again, finally by output isolator
(13) it exports.
2. the MOPA optical fiber lasers of the shaping pulse according to claim 1 based on Electro-optical Modulation, it is characterised in that：Institute
Electrooptic modulator (4) is stated the transmitance for entering its light is adjusted according to external electric signal.
3. the MOPA optical fiber lasers of the shaping pulse according to claim 1 based on Electro-optical Modulation, it is characterised in that：Institute
It includes prime Active Optical Fiber (5), prime bundling device (6) and prime pumping source (7), the prime Active Optical Fiber to state preamplifier system
(5) one end is connected with the output end of the electrooptic modulator (4), input terminal and the prime of the prime bundling device (6)
The other end of Active Optical Fiber (5) is connected, the input terminal of the output end of the prime bundling device (6) and second isolator (8)
It is connected, the pumping input terminal of the prime bundling device (6) is connected with prime pumping source (7).
4. the MOPA optical fiber lasers of the shaping pulse according to claim 3 based on Electro-optical Modulation, it is characterised in that：Institute
It states prime pumping source (7) and is provided with 1, the prime bundling device (6) has 1 pumping input terminal.
5. the MOPA optical fiber lasers of the shaping pulse according to claim 3 based on Electro-optical Modulation, it is characterised in that：Institute
It is ytterbium-doped double-cladded-layer Active Optical Fiber to state prime Active Optical Fiber (5).
6. the MOPA optical fiber lasers of the shaping pulse according to claim 1 based on Electro-optical Modulation, it is characterised in that：Institute
It includes rear class Active Optical Fiber (9), rear class bundling device (10) and rear class pumping source, the rear class active light to state main amplification system
The one end of fine (9) is connected with the output end of second isolator (8), the input terminal of the rear class bundling device (10) and it is described after
The other end of grade Active Optical Fiber (9) is connected, and the output end of the rear class bundling device (10) is defeated with the output isolator (13)
Enter end to be connected, the pumping input terminal of the rear class bundling device (10) is connected with corresponding rear class pumping source.
7. the MOPA optical fiber lasers of the shaping pulse according to claim 6 based on Electro-optical Modulation, it is characterised in that：Institute
There are two the pumping input terminal settings for stating rear class bundling device (10), and there are two rear class pumping source is also provided with, and respectively first
Rear class pumping source (11) and the second rear class pumping source (12), each of rear class bundling device pumping input terminal are correspondingly connected with a rear class
Pumping source.
8. the MOPA optical fiber lasers of the shaping pulse according to claim 6 based on Electro-optical Modulation, it is characterised in that：Institute
It is ytterbium-doped double-cladded-layer Active Optical Fiber to state rear class Active Optical Fiber (9).
9. the MOPA optical fiber lasers of the shaping pulse according to claim 6 based on Electro-optical Modulation, it is characterised in that：Institute
It is bipolar separators to state the first isolator (2)；Second isolator (8) isolator between grade.
10. it is a kind of in claim 1 to 9 it is any it is lower as described in the shaping pulse based on Electro-optical Modulation MOPA optical fiber lasers
Modulator approach, it is characterised in that contain in the step of method：
One electrooptic modulator (4) is set, the signal for inputting its pulsed light is modulated by electrooptic modulator (4), makes arteries and veins
The pulse front edge intensity washed off is less than pulse back edge intensity.
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| CN201810475371.3A CN108390239A (en) | 2018-05-17 | 2018-05-17 | The MOPA optical fiber lasers and modulator approach of shaping pulse based on Electro-optical Modulation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810475371.3A CN108390239A (en) | 2018-05-17 | 2018-05-17 | The MOPA optical fiber lasers and modulator approach of shaping pulse based on Electro-optical Modulation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112582872A (en) * | 2020-12-10 | 2021-03-30 | 上海飞博激光科技有限公司 | Functional module and method for inhibiting waveform distortion |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103474871A (en) * | 2013-09-16 | 2013-12-25 | 中国科学院上海光学精密机械研究所 | Pulse laser time-domain shaping device |
| CN204732669U (en) * | 2015-02-12 | 2015-10-28 | 北京工业大学 | A kind of single-frequency nanosecond pulse full optical fiber laser amplifying device |
| CN208111907U (en) * | 2018-05-17 | 2018-11-16 | 芜湖安瑞激光科技有限公司 | The MOPA optical fiber laser of shaping pulse based on Electro-optical Modulation |
-
2018
- 2018-05-17 CN CN201810475371.3A patent/CN108390239A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103474871A (en) * | 2013-09-16 | 2013-12-25 | 中国科学院上海光学精密机械研究所 | Pulse laser time-domain shaping device |
| CN204732669U (en) * | 2015-02-12 | 2015-10-28 | 北京工业大学 | A kind of single-frequency nanosecond pulse full optical fiber laser amplifying device |
| CN208111907U (en) * | 2018-05-17 | 2018-11-16 | 芜湖安瑞激光科技有限公司 | The MOPA optical fiber laser of shaping pulse based on Electro-optical Modulation |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112582872A (en) * | 2020-12-10 | 2021-03-30 | 上海飞博激光科技有限公司 | Functional module and method for inhibiting waveform distortion |
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