CN110492340A - Infrared double-frequency laser system during one kind is tunable - Google Patents
Infrared double-frequency laser system during one kind is tunable Download PDFInfo
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- CN110492340A CN110492340A CN201910772526.4A CN201910772526A CN110492340A CN 110492340 A CN110492340 A CN 110492340A CN 201910772526 A CN201910772526 A CN 201910772526A CN 110492340 A CN110492340 A CN 110492340A
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- Prior art keywords
- laser
- frequency
- resonator mirror
- double
- tunable
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Classifications
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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
- G02F1/01—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
- G02F1/11—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 acousto-optical elements, e.g. using variable diffraction by sound or like mechanical 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
- H01S3/005—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
- H01S3/0085—Modulating the output, i.e. the laser beam is modulated outside the laser cavity
-
- 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
- H01S3/08—Construction or shape of optical resonators or components thereof
- H01S3/081—Construction or shape of optical resonators or components thereof comprising three or more reflectors
- H01S3/0813—Configuration of resonator
- H01S3/0816—Configuration of resonator having 4 reflectors, e.g. Z-shaped resonators
Abstract
The invention discloses it is a kind of it is tunable in infrared double-frequency laser system, it is related to field of laser device technology, including laser, beam splitter, acousto-optic modulator, coupler, polarizing film, the first resonator mirror, the second resonator mirror, third resonator mirror, the 4th resonator mirror and laser crystal.The present invention, by the cooperation between the structures such as above-mentioned, the generation for having 1, double-frequency laser is shift frequency by acousto-optic modulator, so that double-frequency laser generates process and is more easier and convenient for controlling the effect of frequency shift amount；2, by rotatory polarization piece to specific angle, the beat frequency light for exporting and stablizing double frequency component is formed, while realizing the tunable of infrared double-frequency laser beat frequency in output；3, by two resonant cavities, the laser lower level service life is reduced, improves lasing efficiency, and realizes the effect of dual-wavelength laser output, the tunable laser structure solved in tradition is complex, and tunes the general problem of efficiency.
Description
Technical field
The present invention relates to field of laser device technology, specially it is a kind of it is tunable in infrared double-frequency laser system.
Background technique
Tunable laser refers to the laser that can continuously change laser output wavelength in a certain range, this laser
Device it is widely used, can be used for spectroscopy, photochemistry, medicine, biology, integrated optics, pollution monitoring, semiconductor material add
Work, information processing and communication etc., especially optical communication system, using more and more extensive.But the tunable laser in tradition
Structure is complex, and it is general to tune efficiency.
Summary of the invention
The purpose of the present invention is to provide it is a kind of it is tunable in infrared double-frequency laser system, have the production of 1, double-frequency laser
Life is the shift frequency by acousto-optic modulator, rather than the laser signal that conventional use of two beam is orthogonal, so that double-frequency laser generates
Process is more easier and convenient for controlling the effect of frequency shift amount；2, it by rotatory polarization piece to specific angle, forms output and stablizes
The beat frequency light of double frequency component, at the same realize output in infrared double-frequency laser beat frequency it is tunable, to improve double frequency indirectly
The effect of laser delivery efficiency；3, pass through the first resonator mirror and the second resonator mirror and third resonator mirror and the 4th resonant cavity
Two resonant cavities that mirror is respectively formed can be exported under mid-infrared laser and mid-infrared laser simultaneously corresponding to energy level to state transition
Second laser so that energy level particle quickly falls back to ground state under mid-infrared laser, to reduce the laser lower level service life,
Lasing efficiency is improved, and realizes the effect of dual-wavelength laser output, the tunable laser structure solved in tradition is more multiple
It is miscellaneous, and tune the general problem of efficiency.
To achieve the above object, the invention provides the following technical scheme: it is a kind of it is tunable in infrared double-frequency laser system, packet
Include laser, beam splitter, acousto-optic modulator, coupler, polarizing film, the first resonator mirror, the second resonator mirror, third resonant cavity
Mirror, the 4th resonator mirror and laser crystal.
Preferably, the input end signal of the acousto-optic modulator is connected with control module, controls acousto-optic by control module
The shift frequency frequencies omega si of modulator.
Preferably, it is provided with photodetector after the polarizing film, for receiving double frequency beat frequency light, and optical signal is converted
For electric signal.
Preferably, the output axis signal of the photodetector is connected with signal processing module, for acquiring photodetection
The electric signal of device, is converted into frequency difference signal.
Preferably, the laser crystal is the crystal of four sides polishing, and each burnishing surface of the laser crystal is with respect to resonance
One hysteroscope of chamber, and plated on opposite first resonator mirror of the laser crystal and two burnishing surfaces of the second resonator mirror
There is the high transmittance film to first wave length laser light, is coated on two burnishing surfaces of opposite third resonator mirror and the 4th resonator mirror
To the high transmittance film of second wave length laser light.
Compared with prior art, beneficial effects of the present invention are as follows:
One, the present invention passes through laser, beam splitter, acousto-optic modulator, coupler and the control module of setting, so that double frequency
The generation of laser is the shift frequency by acousto-optic modulator, rather than the laser signal that conventional use of two beam is orthogonal, so that double frequency
Laser generates process and is more easier and is convenient for control frequency shift amount.
Two, the present invention passes through rotatory polarization piece to spy by polarizing film, photodetector and the signal processing module of setting
Fixed angle, formed export stablize double frequency component beat frequency light, while realize output in infrared double-frequency laser beat frequency it is adjustable
It is humorous, to improve the delivery efficiency of double-frequency laser indirectly.
Three, first resonator mirror, second resonator mirror, third resonator mirror, fourth resonant cavity of the present invention by setting
Mirror and laser crystal distinguish shape by the first resonator mirror and the second resonator mirror and third resonator mirror and the 4th resonator mirror
At two resonant cavities, second can be exported under mid-infrared laser and mid-infrared laser corresponding to energy level to state transition simultaneously and swashed
Light, to reduce the laser lower level service life, improves laser so that energy level particle quickly falls back to ground state under mid-infrared laser
Efficiency, and realize that dual-wavelength laser exports.
Detailed description of the invention
Fig. 1 is the schematic diagram of structure of the invention.
In figure: 1- laser, 2- beam splitter, 3- acousto-optic modulator, 4- coupler, 5- polarizing film, the first resonator mirror of 6-,
The second resonator mirror of 7-, 8- third resonator mirror, the 4th resonator mirror of 9-, 10- laser crystal, 11- control module, 12- photoelectricity
Detector, 13- signal processing module.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to Fig. 1, the present invention provides a kind of technical solution: infrared double-frequency laser system during one kind is tunable, including swash
Light device 1, beam splitter 2, acousto-optic modulator 3, coupler 4, polarizing film 5, the first resonator mirror 6, the second resonator mirror 7, third are humorous
Shake hysteroscope 8, the 4th resonator mirror 9 and laser crystal 10, by laser 1 generate the shoot laser that frequency is ω i export to point
The laser of entrance is split by beam device 2, beam splitter 2, wherein a branch of enter acousto-optic modulator 3, is moved by acousto-optic modulator 3
Frequently, frequency is the laser of ω i+ ω si after obtaining shift frequency, is then exported to coupler 4；Another beam is directly output to coupler 4,
The double-frequency laser for being ω si at frequency by the sharp combiner of the laser of not shift frequency and shift frequency in coupler 4.
Further, the input end signal of acousto-optic modulator 3 is connected with control module 11, passes through 11 control sound of control module
The shift frequency frequencies omega si of optical modulator 3, control module 11 connect the microwave source on acousto-optic modulator 3, pass through control microwave source frequency
Rate realizes the modulation for going out optical frequency shift to acousto-optic modulator 3, so that double-frequency laser generates process and is more easier and is convenient for control frequency
Shifting amount.
Further, photodetector 12 is provided with after polarizing film 5, photodetector is the PIN that response frequency is 10MHz
Photodetector for receiving double frequency beat frequency light, and converts optical signal into electric signal, the output axis signal of photodetector 12
It is connected with signal processing module 13, for acquiring the electric signal of photodetector 12, is converted into frequency difference signal, double-frequency laser
Enter photodetector 12 through polarizing film 5, the beat frequency light in double-frequency laser is received by photodetector 12, and optical signal is turned
Electric signal is turned to, by signal processing module 13, the electric signal that photodetector 12 acquires is converted into frequency difference signal, further according to
Corresponding frequency difference signal, rotatory polarization piece 5 to specific angle form the beat frequency light for exporting and stablizing double frequency component, realize simultaneously
Infrared double-frequency laser beat frequency is tunable in output, to improve the delivery efficiency of double-frequency laser indirectly.
Further, laser crystal 10 is the crystal of four sides polishing, and each burnishing surface of laser crystal 10 is with respect to resonant cavity
A hysteroscope, and be coated on opposite first resonator mirror 6 of laser crystal 10 and two burnishing surfaces of the second resonator mirror 7
To the high transmittance film of first wave length laser light, it is coated on two burnishing surfaces of opposite third resonator mirror 8 and the 4th resonator mirror 9
To the high transmittance film of second wave length laser light, the double-frequency laser being emitted by polarizing film 5 is by the first resonator mirror 6 and the second resonance
In two resonant cavities that hysteroscope 7 and third resonator mirror 8 and the 4th resonator mirror 9 are respectively formed, so that laser crystal generated
In infrared double-frequency laser can carry out oscillation amplification in two directions, to form different wave length in two different directions
Laser, and exported from different output cavity mirror, thus in not only increasing infrared double-frequency laser generation effect, also realize
The output independent of two beam different wave length laser.
Working principle: when in use, generate frequency by laser 1 is ω i to infrared double-frequency laser system during this is tunable
Shoot laser export to beam splitter 2, the laser of entrance is split by beam splitter 2, wherein it is a branch of enter acousto-optic modulator 3,
Shift frequency is carried out by acousto-optic modulator 3, frequency is the laser of ω i+ ω si after obtaining shift frequency, is then exported to coupler 4；Another beam
It is directly output to coupler 4, the double frequency for being ω si at frequency by the sharp combiner of the laser of not shift frequency and shift frequency in coupler 4
Laser, hereafter double-frequency laser enters photodetector 12 through polarizing film 5, receives the bat in double-frequency laser by photodetector 12
Frequency light, and electric signal is converted optical signal into, by signal processing module 13, the electric signal that photodetector 12 is acquired is converted
For frequency difference signal, further according to corresponding frequency difference signal, rotatory polarization piece 5 to specific angle forms to export and stablizes double frequency component
Beat frequency light, while realize output in infrared double-frequency laser beat frequency it is tunable, to improve the defeated of double-frequency laser indirectly
Efficiency out, the double-frequency laser being finally emitted by polarizing film 5 is by the first resonator mirror 6 and the second resonator mirror 7 and third resonance
In two resonant cavities that hysteroscope 8 and the 4th resonator mirror 9 are respectively formed, so that infrared double-frequency laser can in laser crystal generation
To carry out oscillation amplification in two directions, to form the laser of different wave length in two different directions, and never
With output cavity mirror output, thus in not only increasing infrared double-frequency laser generation effect, also achieve two beam different wave lengths
The output independent of laser.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (5)
- Infrared double-frequency laser system during 1. one kind is tunable, it is characterised in that including laser (1), beam splitter (2), acousto-optic modulation Device (3), coupler (4), polarizing film (5), the first resonator mirror (6), the second resonator mirror (7), third resonator mirror (8), Four resonator mirrors (9) and laser crystal (10).
- Infrared double-frequency laser system during 2. one kind according to claim 1 is tunable, it is characterised in that: the acousto-optic modulation The input end signal of device (3) is connected with control module (11), passes through the shift frequency frequency of control module (11) control acousto-optic modulator (3) Rate ω si.
- Infrared double-frequency laser system during 3. one kind according to claim 1 is tunable, it is characterised in that: the polarizing film (5) it is provided with photodetector (12) after, for receiving double frequency beat frequency light, and converts optical signal into electric signal.
- Infrared double-frequency laser system during 4. one kind according to claim 3 is tunable, it is characterised in that: the photodetection The output axis signal of device (12) is connected with signal processing module (13), for acquiring the electric signal of photodetector (12), by it Be converted to frequency difference signal.
- Infrared double-frequency laser system during 5. one kind according to claim 1 is tunable, it is characterised in that: the laser crystal It (10) is the crystal of four sides polishing, the hysteroscope of each burnishing surface of the laser crystal (10) with respect to resonant cavity, and institute It states and is coated on opposite first resonator mirror (6) of laser crystal (10) and two burnishing surfaces of the second resonator mirror (7) to first It is coated on two burnishing surfaces of the high transmittance film that wavelength laser penetrates, opposite third resonator mirror (8) and the 4th resonator mirror (9) pair The high transmittance film of second wave length laser light.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910772526.4A CN110492340A (en) | 2019-08-21 | 2019-08-21 | Infrared double-frequency laser system during one kind is tunable |
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| CN201910772526.4A CN110492340A (en) | 2019-08-21 | 2019-08-21 | Infrared double-frequency laser system during one kind is tunable |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1879269A (en) * | 2003-11-13 | 2006-12-13 | 奥斯兰姆奥普托半导体有限责任公司 | Optically pumped semiconductor laser device |
| CN1969433A (en) * | 2004-09-02 | 2007-05-23 | 日立比亚机械股份有限公司 | Laser light source, method for machining workpieces by means of pulsed laser radiation |
| CN101527422A (en) * | 2009-04-17 | 2009-09-09 | 山东大学 | Dual-wavelength solid laser with different light-emitting directions |
| CN102013621A (en) * | 2010-11-18 | 2011-04-13 | 福州高意通讯有限公司 | Tunable dual-frequency laser |
| CN109256658A (en) * | 2018-11-02 | 2019-01-22 | 北京理工大学 | Infrared double-frequency laser system during one kind is tunable |
-
2019
- 2019-08-21 CN CN201910772526.4A patent/CN110492340A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1879269A (en) * | 2003-11-13 | 2006-12-13 | 奥斯兰姆奥普托半导体有限责任公司 | Optically pumped semiconductor laser device |
| CN1969433A (en) * | 2004-09-02 | 2007-05-23 | 日立比亚机械股份有限公司 | Laser light source, method for machining workpieces by means of pulsed laser radiation |
| CN101527422A (en) * | 2009-04-17 | 2009-09-09 | 山东大学 | Dual-wavelength solid laser with different light-emitting directions |
| CN102013621A (en) * | 2010-11-18 | 2011-04-13 | 福州高意通讯有限公司 | Tunable dual-frequency laser |
| CN109256658A (en) * | 2018-11-02 | 2019-01-22 | 北京理工大学 | Infrared double-frequency laser system during one kind is tunable |
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Application publication date: 20191122 |