CN110838668A - Thin slice double-pulse-width output laser and laser output method - Google Patents
Thin slice double-pulse-width output laser and laser output method Download PDFInfo
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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
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/0602—Crystal lasers or glass lasers
- H01S3/0604—Crystal lasers or glass lasers in the form of a plate or disc
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
- G02B27/283—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising used for beam splitting or combining
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/42—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect
- G02B27/4233—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect having a diffractive element [DOE] contributing to a non-imaging application
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/42—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect
- G02B27/4272—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect having plural diffractive elements positioned sequentially along the optical path
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- G—PHYSICS
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- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/09—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on magneto-optical elements, e.g. exhibiting Faraday effect
- G02F1/093—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on magneto-optical elements, e.g. exhibiting Faraday effect used as non-reciprocal devices, e.g. optical isolators, circulators
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
- G02F1/39—Non-linear optics for parametric generation or amplification of light, infrared or ultraviolet waves
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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
- H01S3/14—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range characterised by the material used as the active medium
- H01S3/16—Solid materials
- H01S3/1601—Solid materials characterised by an active (lasing) ion
- H01S3/1603—Solid materials characterised by an active (lasing) ion rare earth
- H01S3/1618—Solid materials characterised by an active (lasing) ion rare earth ytterbium
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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
- H01S3/14—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range characterised by the material used as the active medium
- H01S3/16—Solid materials
- H01S3/163—Solid materials characterised by a crystal matrix
- H01S3/164—Solid materials characterised by a crystal matrix garnet
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Abstract
The invention provides a thin slice double pulse width output laser, comprising: a femtosecond laser; the polarization beam splitting module is used for splitting laser pulses output by the femtosecond laser into two laser beams; one path of laser beam is guided into a first regenerative amplifier through a first reflector, a first film polarizer, a first Faraday optical rotator, a first half-wave plate and a first polarizer in sequence, is oscillated and amplified, and then is output after being subjected to dispersion compensation of a first dispersion grating; and the other path of laser beam is stretched to 2.7ps by a second chirped volume Bragg grating, then is guided into a second regenerative amplifier through a second reflecting mirror, a second thin film polarizing plate, a second Faraday optical rotator, a second half-wave plate and a second polarizing plate in sequence, is oscillated and amplified, and is output after dispersion compensation of the second chirped volume Bragg grating. A laser output method is also provided. The device and the method can simultaneously output the double-pulse-width laser.
Description
Technical Field
The invention relates to a chip laser amplifier, in particular to a chip double-pulse-width output laser.
Background
With the development of the laser processing industry, ultrafast lasers play more and more important roles in the fields of industry and scientific research, for some applications such as pump detection and LIBS, pre-lasers need to be used to act with target substances, and then main lasers interact with the target substances after a certain time delay, so that certain requirements are provided for a laser light source, the laser light source needs to generate two laser pulses with different pulses for output, and the time delay of the two laser pulses is adjustable.
Common high-power picosecond laser amplifiers have INNOSLAB configuration, rod-shaped Nd: YVO4 configuration and sheet configuration, and the basic idea is that firstly a solid or optical fiber mode-locked laser is used as a seed to be injected into a subsequent amplifier, and an amplification stage adopts a regenerative or traveling wave amplification structure to amplify power of 100W or higher. The femtosecond laser is divided into two types of 20-30fs and 300-900fs pulse width, the corresponding narrower pulse width of the former needs to adopt titanium gem with wider gain bandwidth as gain medium, and the average power of the titanium gem is generally lower because the titanium gem is generally in a block structure; and for the latter, because the pulse width is wider, the gain bandwidth requirement on the gain medium is lower, and Yb is generally adopted as Yb: YAG/Yb: KGW thin-sheet crystal is used as a gain medium, and the output power can be higher although the output pulse width is wider. For a dual pulse width laser, a common method is to inject a femtosecond seed source into a femtosecond amplifier, divide the laser into two paths by using a beam splitter after amplification, and then perform dispersion control on the two pulses respectively to obtain outputs of two pulse widths. This method generally produces lower laser power.
Patent CN201075571Y proposes a double-pulse output laser of a q-switched circuit switching scheme, which can obtain a longer q-switched pulse output when a long pulse width driving circuit is used, and a shorter q-switched pulse output when a short pulse width driving circuit is switched. The scheme can obtain laser pulse outputs with two pulse widths of a few nanoseconds and a few hundred nanoseconds, but can not simultaneously output the lasers with the two pulse widths.
Disclosure of Invention
The invention mainly solves the technical problem of providing a thin slice double-pulse-width output laser capable of simultaneously outputting double pulse widths. In order to solve the technical problems, the invention adopts a technical scheme that:
a chip dual pulse width output laser, comprising:
a femtosecond laser;
the polarization beam splitting module is used for splitting laser pulses output by the femtosecond laser into two laser beams;
one path of laser beam is guided into a first regenerative amplifier through a first reflector, a first film polaroid, a first Faraday optical rotator, a first half-wave plate and the first polaroid in sequence, is oscillated and amplified, and then outputs hundred-femtosecond laser after being subjected to dispersion compensation of a first dispersion grating; and the other laser beam is stretched by a second chirped Bragg grating, then is guided into a second regenerative amplifier through a second reflector, a second thin film polarizing plate, a second Faraday optical rotator, a second half-wave plate and a second polarizing plate in sequence, is oscillated and amplified, and then is subjected to dispersion compensation by a second chirped Bragg grating to output picosecond laser.
In one embodiment, the first regenerative amplifier and the second regenerative amplifier are standing wave type regenerative amplifiers, traveling wave regenerative amplifiers, or traveling wave amplifiers.
In one embodiment, the first regenerative amplifiers each include a first end mirror, a first electro-optic crystal, a first quarter wave plate, the first polarizer, a third mirror, a fourth mirror, a sheet gain module, a fifth mirror, and a second end mirror.
In one embodiment, the second regenerative amplifiers each include a third end mirror, a second electro-optic crystal, a second quarter-wave plate, the second polarizer, a sixth mirror, and a fourth end mirror, and the fourth mirror, the sheet gain module, and the fifth mirror are shared by the second regenerative amplifier and the first regenerative amplifier.
In one embodiment, the sheet gain module is a Yb: YAG sheet crystal, a Yb: KGW sheet crystal, a Yb: KYW sheet crystal or a titanium sapphire sheet crystal.
In one embodiment, the first dispersion grating and the second dispersion grating are chirped volume bragg gratings, CFBG, reflective gold gratings, or transmissive dielectric film gratings.
In one embodiment, the femtosecond laser has a repetition frequency of 10-100MHz, a maximum average power of 5-50mW, a pulse width of 100-800fs, and a center wavelength of 1030 nm.
A laser output method of a thin slice dual pulse width output laser as described above, comprising:
outputting laser pulses from a femtosecond laser;
the polarization beam splitting module divides the laser pulse into two laser beams;
one path of laser beam passes through the first reflector, the first film polarizer, the first Faraday rotator, the first half-wave plate and the first polarizer in sequence, is amplified by oscillation in the first regenerative amplifier, and is output after dispersion compensation of the first dispersion grating;
and the other path of laser beam is widened through a second chirped Bragg grating, passes through a second reflecting mirror, a second thin-film polarizing plate, a second Faraday optical rotator, a second half-wave plate and a second polarizing plate in sequence, is subjected to oscillation amplification in a second regenerative amplifier, and is output after dispersion compensation of the second chirped Bragg grating.
In one embodiment, the output of the first regenerative amplifier after oscillating amplification and first dispersive grating dispersion compensation is:
under the condition that no voltage is applied to two ends of the first electro-optical crystal, one path of laser beam firstly returns to the first electro-optical crystal;
then the laser beam is deflected by 90 degrees and is reflected by the first polaroid to enter the slice gain module;
before the laser beam reaches the first electro-optical crystal again, applying a quarter voltage to two ends of the first electro-optical crystal, enabling the laser beam to reciprocate the first polaroid once again, continuously oscillating and amplifying the laser beam in a first regenerative amplifier until the energy reaches a maximum value, removing the voltage at two ends of the first electro-optical crystal, enabling the laser beam to sequentially penetrate through the first polaroid, the first half-wave plate, the first Faraday optical rotator and the first thin film polaroid, and performing dispersion compensation through first dispersion grating dispersion to finally obtain the required hundred-femtosecond laser.
In one embodiment, the output of the second regenerative amplifier after oscillation amplification and second dispersive grating dispersion compensation is:
the other path of laser beam returns to the second electro-optical crystal for the first time under the condition that no voltage is applied to the two ends of the second electro-optical crystal;
then the laser beam is deflected by 90 degrees and is reflected by a second polaroid to enter a slice gain module;
before the laser beam reaches the second electro-optical crystal again, applying a quarter voltage to two ends of the second electro-optical crystal, enabling the laser beam to reciprocate the second polaroid, continuously oscillating and amplifying the laser beam in a second regenerative amplifier until the energy reaches a maximum value, removing the voltage at two ends of the second electro-optical crystal, enabling the laser beam to sequentially penetrate through the second polaroid, the second half-wave plate, the second Faraday rotator and the second thin-film polaroid, and performing dispersion compensation through second dispersive grating dispersion to finally obtain the required picosecond laser.
In the thin-sheet double-pulse-width output laser and the laser output method thereof, one femtosecond laser is divided into two paths through a polarization light splitting module, wherein one path is subjected to pulse broadening, and the other path keeps pulse width unchanged. Two divided laser pulses are respectively injected into corresponding regenerative amplifiers, the two regenerative amplifiers share one gain amplification module, the two regenerative amplifiers are separated through the incident angle of the crystal, the amplified pulses are respectively subjected to dispersion compensation through a dispersion control module, and finally, hundreds of femtoseconds and a few picoseconds of double-pulse laser output are output.
Drawings
FIG. 1 is a schematic diagram of a chip dual pulse width output laser according to an embodiment.
In the figure, 1-femtosecond laser, 2-polarization beam splitting module, 3-chirped volume Bragg grating, 4-second mirror, 5-first mirror, 6-second thin film polarizer, 7-first thin film polarizer, 8-second Faraday rotator, 9-second half wave plate, 10-first Faraday rotator, 11-first half wave plate, 12-second polarizer, 13-second quarter wave plate, 14-second electro-optical crystal, 15-third end mirror, 16-first polarizer, 17-first quarter wave plate, 18-first electro-optical crystal, 19-first end mirror, 20-sixth mirror, 21-third mirror, 22-fourth mirror, 23-slice gain module, 24-fifth mirror, 25-fourth end mirror, 26-second end mirror, 27-second dispersion grating, 28-first dispersion grating.
Detailed Description
Referring to fig. 1, a thin-slab dual pulse width output laser according to an embodiment of the present invention includes: a femtosecond laser 1; and the polarization beam splitting module 2 is used for splitting the laser pulse output by the femtosecond laser 1 into two laser beams. One path of laser beam is guided into a first regeneration amplifier through a first reflector 5, a first thin film polarizer 7, a first Faraday optical rotator 10, a first half-wave plate 11 and a first polarizer 16 in sequence, is oscillated and amplified, is subjected to dispersion compensation through a first dispersion grating 28 and is output; the other path of laser beam is widened by the chirped volume Bragg grating 3, then is guided into a second regenerative amplifier through a second reflecting mirror 4, a second thin film polarizing plate 6, a second Faraday optical rotator 8, a second half-wave plate 9 and a second polarizing plate 12 in sequence, is oscillated and amplified, and is output after being subjected to dispersion compensation by a second dispersive grating 27.
In one embodiment, the femtosecond laser 1 has a repetition frequency of 10-100MHz, a maximum average power of 5-50mW, a pulse width of 100-800fs, and a center wavelength of 1030 nm.
Specifically, in one embodiment, the first regenerative amplifier and the second regenerative amplifier may be standing wave type regenerative amplifiers as shown in fig. 1, and in other embodiments, the first regenerative amplifier and the second regenerative amplifier may also be traveling wave regenerative amplifiers or traveling wave amplifiers.
In particular, in one of the embodiments, the first regenerative amplifiers each comprise a first end mirror 19, a first electro-optical crystal 18, a first quarter-wave plate 17, a first polarizer 16, a third mirror 21, a fourth mirror 22, a sheet gain block 23, a fifth mirror 24 and a second end mirror 26.
Specifically, in one of the embodiments, the second regenerative amplifiers each include a third end mirror 15, a second electro-optical crystal 14, a second quarter-wave plate 13, a second polarizer 12, a sixth mirror 20, and a fourth end mirror 25, and the second regenerative amplifier and the first regenerative amplifier share a fourth mirror 22, a sheet gain block 23, and a fifth mirror 24.
Specifically, in one embodiment, the sheet gain module 23 may be a Yb: YAG sheet crystal, a Yb: KGW sheet crystal, a Yb: KYW sheet crystal, a titanium sapphire sheet crystal, or the like.
In one embodiment, the first dispersion grating 28 and the second dispersion grating 27 may be chirped volume bragg gratings, CFBG, reflective gold gratings, or transmissive dielectric film gratings.
A laser output method of a thin slice dual pulse width output laser as described above, comprising:
outputting laser pulses from the femtosecond laser 1;
the polarization beam splitting module 2 divides the laser pulse into two laser beams;
one path of laser beam is guided into a first regeneration amplifier through a first reflector 5, a first thin film polarizer 7, a first Faraday optical rotator 10, a first half-wave plate 11 and a first polarizer 16 in sequence, is oscillated and amplified, is subjected to dispersion compensation through a first dispersion grating 28 and is output;
the other path of laser beam is widened by the chirped volume Bragg grating 3, then is guided into a second regenerative amplifier through a second reflecting mirror 4, a second thin film polarizing plate 6, a second Faraday optical rotator 8, a second half-wave plate 9 and a second polarizing plate 12 in sequence, is oscillated and amplified, and is output after being subjected to dispersion compensation by a second dispersive grating 27.
Specifically, in one embodiment, the first dispersion grating 28 is used to perform dispersion compensation to obtain a hundred femtosecond pulse output, such as about 350 fs.
In one embodiment, the other laser beam is broadened by the chirped volume bragg grating 3 to finally output a double-pulse laser output of several picoseconds, for example, about 2.7 ps.
Specifically, in one embodiment, the specific process of amplifying by oscillating in the first regenerative amplifier and outputting after compensating by the first dispersive grating dispersion 28 may be:
under the condition that no voltage is applied to two ends of the first electro-optical crystal 18, one path of laser beam firstly returns to the first electro-optical crystal 18;
then the laser beam is deflected by 90 degrees and reflected by the first polarizer 16 into the sheet gain module 23;
then before the laser beam reaches the first electro-optical crystal 18 again, a quarter of voltage is applied to two ends of the first electro-optical crystal 18, the laser beam does not change when going back and forth the first polaroid 16, then the laser beam is continuously oscillated and amplified in the first regenerative amplifier, when the energy reaches a maximum value, the voltage at two ends of the first electro-optical crystal 18 is removed, the laser beam sequentially passes through the first polaroid 16, the first half-wave plate 11, the first Faraday rotator 10 and the first thin film polaroid 7, and then dispersion compensation is carried out through the first dispersion grating 28, so that the required laser output is finally obtained.
Specifically, in one embodiment, the specific process of outputting after the second dispersive grating dispersion compensation after the oscillation amplification in the second regenerative amplifier can be as follows:
the other path of laser beam returns to the second electro-optical crystal 14 for the first time under the condition that no voltage is applied to the two ends of the second electro-optical crystal 14;
then the laser beam is deflected by 90 degrees and reflected by the second polarizer 12 into the sheet gain module 23;
before the laser beam reaches the second electro-optical crystal 14 again, a quarter voltage is applied to two ends of the second electro-optical crystal 14, the laser beam goes back and forth the second polaroid 12 again, then the laser beam is continuously oscillated and amplified in the second regenerative amplifier, when the energy reaches a maximum value, the voltage at two ends of the second electro-optical crystal 14 is removed, the laser beam sequentially passes through the second polaroid 12, the second half-wave plate 9, the second Faraday optical rotator 8 and the second thin-film polaroid 6, and then the laser beam is subjected to dispersion compensation through the second dispersion grating 27 to finally obtain the required laser output.
The specific structure and related definition of each component involved in the method are the same as those described in the above-mentioned chip dual pulse width output laser, and will not be described again here.
In the thin-sheet double-pulse-width output laser and the laser output method thereof, one femtosecond laser is divided into two paths through a polarization light splitting module, wherein one path is subjected to pulse broadening, and the other path keeps pulse width unchanged. Two divided laser pulses are respectively injected into corresponding regenerative amplifiers, the two regenerative amplifiers share one gain amplification module, the two regenerative amplifiers are separated through the incident angle of the crystal, the amplified pulses are respectively subjected to dispersion compensation through a dispersion control module, and finally, hundreds of femtoseconds and a few picoseconds of double-pulse laser output are output. In specific application, the thin-sheet double-pulse-width output laser has a compact structure, can output two beams of laser with the same wavelength and different pulse widths, is used as a seed light source of two regenerative amplifiers through dispersion control, and obtains two paths of laser output of 2.7ps and 350fs respectively through dispersion compensation after amplification.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A chip dual pulse width output laser, comprising:
a femtosecond laser;
the polarization beam splitting module is used for splitting laser pulses output by the femtosecond laser into two laser beams;
one path of laser beam is guided into a first regenerative amplifier through a first reflector, a first film polaroid, a first Faraday optical rotator, a first half-wave plate and the first polaroid in sequence, is oscillated and amplified, and then outputs hundred-femtosecond laser after being subjected to dispersion compensation of a first dispersion grating; and the other laser beam is stretched by a second chirped Bragg grating, then is guided into a second regenerative amplifier through a second reflector, a second thin film polarizing plate, a second Faraday optical rotator, a second half-wave plate and a second polarizing plate in sequence, is oscillated and amplified, and then is subjected to dispersion compensation by a second chirped Bragg grating to output picosecond laser.
2. The monolithic dual pulse width output laser as claimed in claim 1, wherein the first regenerative amplifier and the second regenerative amplifier are standing wave type regenerative amplifiers, traveling wave regenerative amplifiers, or traveling wave amplifiers.
3. The slab dual pulse width output laser as claimed in claim 1, wherein the first regenerative amplifiers each comprise a first end mirror, a first electro-optic crystal, a first quarter wave plate, the first polarizer, a third mirror, a fourth mirror, a slab gain block, a fifth mirror, and a second end mirror.
4. The slab dual pulse width output laser as claimed in claim 3, wherein the second regenerative amplifiers each comprise a third end mirror, a second electro-optic crystal, a second quarter-wave plate, the second polarizer, a sixth mirror, and a fourth end mirror, and the fourth mirror, the slab gain module, and the fifth mirror are shared by the second regenerative amplifier and the first regenerative amplifier.
5. The slab dual pulse width output laser of claim 1, wherein the slab gain module is a Yb: YAG slab crystal, a Yb: KGW slab crystal, a Yb: KYW slab crystal, or a titanium sapphire slab crystal.
6. The thin slab dual pulse width output laser as claimed in claim 1, wherein the first and second dispersion gratings are chirped volume bragg gratings, CFBG, reflective gold gratings, or transmissive dielectric film gratings.
7. The thin slab dual pulse width output laser as claimed in claim 1, wherein the femtosecond laser has a repetition frequency of 10-100MHz, a maximum average power of 5-50mW, a pulse width of 100-800fs, and a center wavelength of 1030 nm.
8. A laser output method of a thin slice dual pulse width output laser as claimed in any one of claims 1 to 7, comprising:
outputting laser pulses from a femtosecond laser;
the polarization beam splitting module divides the laser pulse into two laser beams;
one path of laser beam passes through the first reflector, the first film polarizer, the first Faraday rotator, the first half-wave plate and the first polarizer in sequence, is amplified by oscillation in the first regenerative amplifier, and is output after dispersion compensation of the first dispersion grating;
and the other path of laser beam is widened through a second chirped Bragg grating, passes through a second reflecting mirror, a second thin-film polarizing plate, a second Faraday optical rotator, a second half-wave plate and a second polarizing plate in sequence, is subjected to oscillation amplification in a second regenerative amplifier, and is output after dispersion compensation of the second chirped Bragg grating.
9. The laser output method of the thin slice dual pulse width output laser as claimed in claim 8, wherein the output after the first dispersion grating dispersion compensation after the amplification by the oscillation in the first regenerative amplifier is:
under the condition that no voltage is applied to two ends of the first electro-optical crystal, one path of laser beam firstly returns to the first electro-optical crystal;
then the laser beam is deflected by 90 degrees and is reflected by the first polaroid to enter the slice gain module;
before the laser beam reaches the first electro-optical crystal again, applying a quarter voltage to two ends of the first electro-optical crystal, enabling the laser beam to reciprocate the first polaroid once again, continuously oscillating and amplifying the laser beam in a first regenerative amplifier until the energy reaches a maximum value, removing the voltage at two ends of the first electro-optical crystal, enabling the laser beam to sequentially penetrate through the first polaroid, the first half-wave plate, the first Faraday optical rotator and the first thin film polaroid, and performing dispersion compensation through first dispersion grating dispersion to finally obtain the required hundred-femtosecond laser.
10. The laser output method of the thin-slice dual-pulse-width output laser as claimed in claim 8, wherein the output after the second dispersion grating dispersion compensation after the oscillation amplification in the second regenerative amplifier is:
the other path of laser beam returns to the second electro-optical crystal for the first time under the condition that no voltage is applied to the two ends of the second electro-optical crystal;
then the laser beam is deflected by 90 degrees and is reflected by a second polaroid to enter a slice gain module;
before the laser beam reaches the second electro-optical crystal again, applying a quarter voltage to two ends of the second electro-optical crystal, enabling the laser beam to reciprocate the second polaroid, continuously oscillating and amplifying the laser beam in a second regenerative amplifier until the energy reaches a maximum value, removing the voltage at two ends of the second electro-optical crystal, enabling the laser beam to sequentially penetrate through the second polaroid, the second half-wave plate, the second Faraday rotator and the second thin-film polaroid, and performing dispersion compensation through second dispersive grating dispersion to finally obtain the required picosecond laser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810937969.XA CN110838668A (en) | 2018-08-17 | 2018-08-17 | Thin slice double-pulse-width output laser and laser output method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114039269A (en) * | 2021-10-20 | 2022-02-11 | 安徽华创鸿度光电科技有限公司 | Method and system for suppressing amplified spontaneous emission in high-gain pulse laser amplifier |
| CN114650096A (en) * | 2022-03-24 | 2022-06-21 | 中国电信股份有限公司 | Optical path self-adaptive dispersion compensation method, optical module and wavelength division multiplexing system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114039269A (en) * | 2021-10-20 | 2022-02-11 | 安徽华创鸿度光电科技有限公司 | Method and system for suppressing amplified spontaneous emission in high-gain pulse laser amplifier |
| CN114039269B (en) * | 2021-10-20 | 2024-04-30 | 安徽华创鸿度光电科技有限公司 | Method and system for suppressing amplified spontaneous emission in high-gain pulse laser amplifier |
| CN114650096A (en) * | 2022-03-24 | 2022-06-21 | 中国电信股份有限公司 | Optical path self-adaptive dispersion compensation method, optical module and wavelength division multiplexing system |
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