CN110112642A - A kind of optical parametric oscillator - Google Patents
A kind of optical parametric oscillator Download PDFInfo
- Publication number
- CN110112642A CN110112642A CN201910421535.9A CN201910421535A CN110112642A CN 110112642 A CN110112642 A CN 110112642A CN 201910421535 A CN201910421535 A CN 201910421535A CN 110112642 A CN110112642 A CN 110112642A
- Authority
- CN
- China
- Prior art keywords
- light
- pump light
- pump
- mirror
- pumping
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 109
- 239000013078 crystal Substances 0.000 claims abstract description 80
- 238000005086 pumping Methods 0.000 claims abstract description 58
- 230000008878 coupling Effects 0.000 claims abstract description 30
- 238000010168 coupling process Methods 0.000 claims abstract description 30
- 238000005859 coupling reaction Methods 0.000 claims abstract description 30
- 230000010287 polarization Effects 0.000 claims abstract description 18
- 238000006243 chemical reaction Methods 0.000 claims description 23
- 230000006378 damage Effects 0.000 claims description 13
- 238000010521 absorption reaction Methods 0.000 claims description 10
- 239000000835 fiber Substances 0.000 claims description 8
- 238000005070 sampling Methods 0.000 claims description 6
- 229910052594 sapphire Inorganic materials 0.000 claims description 5
- 239000010980 sapphire Substances 0.000 claims description 5
- 125000006850 spacer group Chemical group 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 4
- 208000027418 Wounds and injury Diseases 0.000 claims description 3
- 208000014674 injury Diseases 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims 1
- 230000008901 benefit Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000002310 reflectometry Methods 0.000 description 5
- 230000001427 coherent effect Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 239000010437 gem Substances 0.000 description 2
- 229910001751 gemstone Inorganic materials 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 241001062009 Indigofera Species 0.000 description 1
- 229910003327 LiNbO3 Inorganic materials 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- H01S3/08059—Constructional details of the reflector, e.g. shape
-
- 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
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
-
- 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
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
- H01S3/094049—Guiding of the pump light
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
A kind of optical parametric oscillator, comprising: pumping laser source device 100, for generating pump light；Light control device 200 is pumped, is adjusted for receiving pump light, and to the spot size and polarization direction of pump light, including dichroic mirror 208, and the pump light after adjusting is exported by dichroic mirror 208；Resonator device 300, including nonlinear optical crystal 301, high reflectance hysteroscope 302 and output coupling mirror 303, wherein, nonlinear optical crystal 301 is set between high reflectance hysteroscope 302 and output coupling mirror 303, nonlinear optical crystal 301 generates signal light and ideler frequency light for receiving pump light derived from dichroic mirror 208 and realizing, and is exported to high reflectance hysteroscope 302；The normal direction and pump direction of high reflectance hysteroscope 302 are equipped with default angle, for reflected pump light to nonlinear optical crystal 301, so that the pump light and incident pump light that reflect are formed in crystals, standard is conllinear, and signal light and ideler frequency light pass sequentially through dichroic mirror 208 and the output of output coupling mirror 303.
Description
Technical field
The present invention relates to field of lasers more particularly to a kind of optical parametric oscillators.
Background technique
The structure of laser specifically includes that gain media, resonant cavity and pumping source.The working principle of general laser is base
In the population inversion of gain media, coherent laser is exported after carrying out stimulated radiation amplification by the frequency-selecting and feedback of resonant cavity.
It is the second nonlinear optic conversion based on nonlinear dielectric in optical parametric oscillator principle, pumping laser is in nonlinear dielectric
Two beam laser are inside converted into, a branch of is signal light, and another beam is ideler frequency light, is then carried out by the frequency-selecting of resonant cavity and feedback non-
Coherent laser is exported after linear optics conversion amplification.Optical parametric oscillator light source with wavelength tuning range, convert by wide, energy
It is high-efficient, the advantages that coherent light, structure of whole solid state that two beams mutually tangle can be generated simultaneously, in laser chemistry, quantum coherent, medicine
Equal fields have a wide range of applications.The optical parametric oscillator of high-energy laser radar, medicine photoacoustic imaging and laser from
There is very big application demand in the fields such as the frequency expansion of body.Have benefited from recent years nonlinear optical crystal growing technology at
Ripe, the design of optical parametric oscillator achieves important progress.
The output energy of optical parametric oscillator is mainly limited by energy conversion efficiency and highest pumping laser energy,
Wherein, highest pumping laser energy is limited to the power density damage threshold of nonlinear optical crystal and each optical element, therefore
It proposes high power output key to be reasonably to design resonant cavity, to improve the energy conversion efficiency of optical parametric oscillator.
Summary of the invention
(1) technical problems to be solved
Based on the above issues, the present invention provides a kind of optical parametric oscillators, by reasonably configuring the knot such as resonant cavity
Structure will pump the quasi- conllinear pump light of two beam of photogenerated, and energy conversion efficiency can be improved in reasonable Resonator design, in addition simple venation
Punching output energy is other than improving transfer efficiency it should also be taken into account that how to improve highest pumping when being no more than damage threshold
Energy, improve pump energy can also be improved transfer efficiency to a certain extent, to overcome existing high energy pulse optical parameter
Deficiency on the output energy and energy conversion efficiency of oscillator.
(2) technical solution
The present invention provides a kind of optical parametric oscillators, comprising: pumping laser source device 100, for generating pump light；
Light control device 200 is pumped, is adjusted for receiving pump light, and to the spot size and polarization direction of pump light, including
Dichroic mirror 208, and the pump light after adjusting is exported by dichroic mirror 208；Resonator device 300, including non-linear optical crystal
Body 301, high reflectance hysteroscope 302 and output coupling mirror 303, wherein nonlinear optical crystal 301 is set to high reflectance hysteroscope
Between 302 and output coupling mirror 303, dichroic mirror 208 is set between output coupling mirror 303 and nonlinear optical crystal 301, non-thread
Property optical crystal 301 for receiving pump light derived from dichroic mirror 208 and realizing that nonlinear optics conversion generates signal light and spare time
Frequency light, and exported to high reflectance hysteroscope 302；The normal direction and pump direction of high reflectance hysteroscope 302 are equipped with pre-
If angle, for reflected pump light to nonlinear optical crystal 301, so that the pump light of reflection and incident pump light are in crystal
Inside forms standard collinearly, and the signal light and ideler frequency light of the quasi- conllinear pumping photogenerated of two beams pass sequentially through dichroic mirror 208 and export coupling
Mirror 303 is closed to export.
Optionally, pumping light control device 200 also successively includes high energy absorption diaphragm 202, polarization beam splitting along optical path direction
Cube 204, lens 207, and it is respectively the first half-wave plate and that the front and back of polarizing beam splitter cube 204, which respectively sets half of wave plate 203,
Two half-wave plates, and first half-wave plate and the second half-wave plate are rotatable, 207 front and back of lens respectively sets a light path calibration diaphragm 206
Respectively the first light path calibration diaphragm and the second light path calibration diaphragm, wherein high energy absorption diaphragm 202 is for limiting pump light
The pump light of spot size and absorption after the deviation of resonant cavity optical path, to protect the pumping laser source device 100 not returned
The pumping light injury returned；Half-wave plate 203 is used to rotate the linear polarization of pump light；Polarizing beam splitter cube 204 will be for that will pump
The horizontal polarization composition and vertical polarized component of Pu light separate, and the vertical polarized component of pump light is sent to the second half-wave
Piece；Light path calibration diaphragm 206 is for calibrating pumping optical path；Lens 207 are used to adjust the spot size of pump light；From the second optical path
The pump light of calibration diaphragm outgoing is exported by dichroic mirror 208.
Optionally, lens 207 include plano-convex lens 2071 and plano-concave lens 2072, plano-convex lens 2071 and plano-concave lens
2072 planar section is opposite be arranged in parallel and its distance between be the plano-convex lens 2071 and plano-concave lens 2072 coke
The sum of away from.
Optionally, the normal direction of high reflectance hysteroscope 302 is equipped with default angle with pump direction and is less than or equal to
0.3°。
Optionally, resonator device 300 further includes electric actuator system 304, and upper surface is equipped with non-linear optical crystal
Body 301, for driving nonlinear optical crystal 301 to rotate.
Optionally, electric actuator system 304 includes crystal fixed column 3041, rotating arm 3042, turntable 3043, direct current
Servo-electric actuator 3044, reset spring 3045 and sapphire spacer 3046, wherein crystal fixed column 3041 is for carrying
Nonlinear optical crystal 301, crystal fixed column 3041 are fixed on one end of rotating arm 3042, and 3042 axis of rotating arm is connected to turntable
3043, DC servo electric actuator 3044 is connect by the way that sapphire spacer 3046 is vertical with the other end of rotating arm 3042, multiple
One end of position spring 3045 is vertical with one end of rotating arm 3042 to be connect, and the other end of reset spring 3045 is fixed.
Optionally, the light that output coupling mirror 303 exports further includes remnant pump light, and optical parametric oscillator further includes monitoring
Control system 400, monitor control system 400 include the first filter 401, the second filter 402 and ideler frequency light high reflection mirror
403, wherein the first filter 401 is used for filtration residue pump light, and filtered light beam is sent to the second filter 402,
Ideler frequency light is sent to ideler frequency light high reflection mirror 403 for separating ideler frequency light and signal light by the second filter 402.
Optionally, monitor control system 400 further include beam sampling mirror 404, fiber spectrometer 405, control computer 406 with
And actuator control 407, wherein beam sampling mirror 404 is for reflective portion signal light to fiber spectrometer 405, optical fiber light
Spectrometer 405 is used for the wavelength of measuring signal light, and control computer 406 is for real-time display wavelength and utilizes actuator control 407
Electric actuator system 304 is controlled to rotate.
Optionally, pumping light control device 200 further include laser energy collector 205, for collect remnant pump light with
And the horizontal polarization pump light that polarizing beam splitter cube 204 separates.
Optionally, pumping light control device 200 further includes multiple high reflection mirrors 201, for changing the direction of pump light.
(3) beneficial effect
The present invention provides a kind of optical parametric oscillators, at least have the following beneficial effects:
(1) guaranteeing premise of the pumping light power density no more than nonlinear optical crystal and each optic element damage threshold value
Under, pumping light power density as high as possible is obtained using the pumping light control device 200 that can continuously adjust pump energy, is mentioned
The energy conversion efficiency of high non-linearity optical transition；
(2) guaranteeing premise of the pumping light power density no more than nonlinear optical crystal and each optic element damage threshold value
Under, big pump spot diameter is obtained using the pumping light control device 200 that can regulate and control pump light spot size, improves highest simple venation
Rush pump energy and output pulse energy；
(3) using the light path design of quasi- conllinear round trip pumping, the transfer efficiency of pumping laser energy is improved；
(4) using the output coupling mirror 303 of the optimum reflection rate through measuring, guarantee that the pump energy optimized turns
Change efficiency；
(5) (i.e. signal light and ideler frequency light inversely and are frequently converted to pumping guaranteeing not occur the conversion of reverse nonlinear optics
Light) under the premise of use large scale (optical path length) nonlinear optical crystal, improve nonlinear optics conversion process luminous energy increase
Benefit, and compress the spectral line width of output pump light.
Detailed description of the invention
Fig. 1 diagrammatically illustrates the structural schematic diagram of the optical parametric oscillator of the embodiment of the present disclosure；
Fig. 2 diagrammatically illustrates the top view of 304 structure of electric actuator system of the embodiment of the present disclosure；
Fig. 3 diagrammatically illustrates the right view of 304 structure of electric actuator system of the embodiment of the present disclosure.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, and reference
Attached drawing, the present invention is described in more detail.
The present invention provides a kind of optical parametric oscillators, referring to Fig. 1, comprising: pumping laser source device 100, for producing
Raw pump light；Light control device 200 is pumped, the spot size and polarization direction for receiving pump light, and to pump light carry out
It adjusts, including dichroic mirror 208, and the pump light after adjusting is exported by dichroic mirror 208；Resonator device 300, including it is non-thread
Property optical crystal 301, high reflectance hysteroscope 302 and output coupling mirror 303, wherein nonlinear optical crystal 301 is set to parallel
Between the high reflectance hysteroscope 302 and output coupling mirror 303 of compact placement, dichroic mirror 208 is set to output coupling mirror 303 and non-thread
Property optical crystal 301 between, nonlinear optical crystal 301 is for receiving pump light derived from dichroic mirror 208 and realize non-linear
Optical transition generates signal light and ideler frequency light, and is exported to high reflectance hysteroscope 302；The normal of high reflectance hysteroscope 302
Direction and pump direction are equipped with default angle, for reflected pump light to nonlinear optical crystal 301, so that the pumping of reflection
Light forms standard collinearly in crystals with incident pump light, and the signal light and ideler frequency light of the quasi- collinearly pumping photogenerated of two beams are successively
It is exported by the dichroic mirror 208 and output coupling mirror 303.It below will be 532nm, nonlinear optical crystal with pump wavelength
301 is this programme are described in detail for ktp crystal.
Pumping laser source device 100, for generating pump light；
Specifically, the pulse recurrence frequency of pumping laser source device 100 is 10Hz in the embodiment of the present invention, pulse width is
10ns, the Nd:YAG laser that spot diameter is 10mm, are made by the laser of the wavelength 532nm of frequency-doubling crystal second_harmonic generation
For the pumping source of optical parametric oscillator nonlinear optics conversion process.
Light control device 200 is pumped, is adjusted for receiving pump light, and to the spot size and polarization direction of pump light
Section, including dichroic mirror 208, and the pump light after adjusting is exported by dichroic mirror 208；
Specifically, swashing after pumping light control device 200 is set to pumping laser source device 100 for receiving and controlling pumping
The pump light that light supply apparatus 100 generates, to obtain the continuously adjustable pump light of certain spot size, certain polarization, energy, and will
Pump light is introduced into resonator device 300, and the absorbable pump light returned after the deviation of 300 optical path of resonator device, is prevented
The pumping laser damage pumping laser source device 100 only returned.It successively include high energy absorption diaphragm along pumping optical propagation direction
202, polarizing beam splitter cube 204, lens 207, dichroic mirror 208, and 204 front and back of polarizing beam splitter cube respectively sets half of wave plate
203 be respectively the first half-wave plate and the second half-wave plate, and the first half-wave plate and the second half-wave plate are rotatable；207 front and back of lens is each
If a light path calibration diaphragm 206 is respectively the first light path calibration diaphragm and the second light path calibration diaphragm, wherein high energy absorption diaphragm
202 outer diameter is 40mm, clear aperature 9mm, on the one hand for limiting the spot size of pump light, on the other hand for absorbing
The pump light returned after the deviation of 300 optical path of resonator device prevents the pumping laser returned damage pumping laser source device
100；Half-wave plate 203 can be with the linear polarization of continuous rotation pump light, and the half-wave plate 203 in the embodiment of the present invention is two,
Respectively the first half-wave plate and the second half-wave plate, are respectively arranged on the front and back of polarizing beam splitter cube 204, described for rotating into
The linear polarization of the pump light of polarizing beam splitter cube 204 and the pump light projected from polarizing beam splitter cube 204；Polarization
Beam-dividing cube 204 can separate the horizontal polarization composition of pump light and vertical polarized component, and by pump light it is vertical partially
Vibration ingredient is sent to the second half-wave plate, in the embodiment of the present invention, polarizing beam splitter cube 204 and the first half-wave plate 203 group together
At pump energy attenuator, continuously adjusting to the pump energy polarized vertically is realized, and guarantee guidance to next optics
The polarization for the pump light that the wavelength of element is 532nm is to erect required by ktp crystal phase-matching condition in the embodiment of the present invention
Straight polarization, while extra horizontal polarisation component being guided into laser energy collector 205 and is collected, prevent useless pumping
Light is emitted to the free space other than optical path；Light path calibration diaphragm 206 is for calibrating pumping optical path, optical path in the embodiment of the present invention
The quantity for calibrating diaphragm 206 is two, and respectively the first light path calibration diaphragm and the second light path calibration diaphragm are respectively arranged on lens
207 front and back；Lens 207 are used to adjust the spot size of pump light, and lens 207 include plano-convex lens 2071 and plano-concave lens
2072, plano-convex lens 2071 and plano-concave lens 2072 form a Galilean telescope system, 2071 peace of plano-convex lens together
The planar sections of concavees lens 2072 is opposite be arranged in parallel and its distance between for plano-convex lens 2071 and plano-concave lens 2072
The sum of focal length, the distance of plano-convex lens 2071 and plano-concave lens 2072 can be finely adjusted so that emergent light in optional situation
For directional light, incident pump light enters from the convex surface of plano-convex lens 2071, projects from the concave surface of plano-concave lens 2072；Dichroic mirror
208 are set in resonator device 300, are greater than 99% to the reflectivity of the pump light of wavelength 532nm, in resonator device 300
The transmissivity of newly generated signal light and the wavelength of ideler frequency light is greater than 96%, the pump for will be emitted from the second light path calibration diaphragm
Pu light-output will not influence the feedback of the light in resonator device 300 and laser generation to resonator device 300.Guaranteeing to pump
Pu optical power density uses as high as possible under the premise of being not more than nonlinear optical crystal 301 and each optic element damage threshold value
Pumping light power density, improve nonlinear optics conversion energy conversion efficiency, and use big pump spot diameter, improve most
High pulse pump energy and output pulse energy.
The pumping light control device 200 further includes multiple high reflection mirrors 201, for changing the direction of pump light, the present invention
The pump light that pumping laser source device 100 generates in embodiment is vertically penetrated after 3 high reflection mirrors 201 change direction in high energy
Diaphragm 202 is absorbed, the pump light polarized vertically projected from polarizing beam splitter cube 204 hangs down after a high reflection mirror 201
In the second half-wave plate, the pump light projected from the second half-wave plate is vertically penetrated after a high reflection mirror 201 in the first light for direct projection
Diaphragm is calibrated on road, and the pump light projected from the second light path calibration diaphragm is penetrated after a high reflection mirror 201 in dichroic mirror 208.
Resonator device 300, including nonlinear optical crystal 301, high reflectance hysteroscope 302 and output coupling mirror 303,
Wherein, nonlinear optical crystal 301 is set between high reflectance hysteroscope 302 and output coupling mirror 303, and dichroic mirror 208 is set to defeated
Out between coupling mirror 303 and nonlinear optical crystal 301, nonlinear optical crystal 301 is for receiving the derived pump of dichroic mirror 208
Pu light simultaneously realizes that nonlinear optics conversion generates signal light and ideler frequency light, and is exported to high reflectance hysteroscope 302；High reflection
The normal direction and pump direction of rate hysteroscope 302 are equipped with default angle, for reflected pump light to nonlinear optical crystal
301, so that the pump light of reflection and incident pump light are formed in crystals, standard is conllinear, the quasi- conllinear pumping photogenerated of two beams
Signal light and ideler frequency light pass sequentially through the dichroic mirror 208 and output coupling mirror 303 exports.
Specifically, resonator device 300, increases for realizing the wavelength selection of pump light, the luminous energy of nonlinear optics conversion
Benefit and feedback simultaneously generate oscillation, final to stablize output laser.High reflectance hysteroscope 302 and one are anti-via measuring and optimization
The output coupling mirror 303 for penetrating rate forms a resonant cavity, the compact placement parallel with output coupling mirror 303 of high reflectance hysteroscope 302.
Nonlinear optical crystal 301 is placed in resonant cavity, for obtaining the luminous energy gain of nonlinear optics conversion, is guaranteeing do not occur
The nonlinear optical crystal that big optical path length is used under the premise of reverse nonlinear optics conversion, it is converted to improve nonlinear optics
The luminous energy gain of journey, and the spectral line width of output pump light is compressed, the material of the nonlinear optical crystal 301 can be KTP
(KTiOPO4)、LNB(LiNbO3) etc., in the embodiment of the present invention, the material of nonlinear optical crystal 301 uses ktp crystal, non-thread
Property optical crystal 301 be set between high reflectance hysteroscope 302 and output coupling mirror 303, for realizing nonlinear optics conversion light
Energy gain, ktp crystal have the advantages that damage threshold is high, nonlinear factor is high, thermal sensitive resin is low etc., basis in the embodiment of the present invention
Required output wavelength range uses two pieces of ktp crystals that can be replaced mutually, and size is 14mm*9mm*20mm, 14mm*9mm's
Two faces are light pass surface, and light pass surface is coated with broadband anti-reflection film, and main shaft plane is the face xz, and cutting angle is Φ=0 degree, θ=70
Degree and θ=53 degree, using 1I type-Ⅱphase matching；Dichroic mirror 208 is set to output coupling mirror 303 and nonlinear optical crystal 301
Between, nonlinear optical crystal 301 is for receiving pump light derived from dichroic mirror 208 and realizing that nonlinear optics conversion generates letter
Number light and ideler frequency light, and exported to high reflectance hysteroscope 302；High reflectance hysteroscope 302 has height at pump wavelength
Reflectivity can make pump light twice by nonlinear optical crystal 301, realize the round trip pumping of optical parameter process back and forth,
Energy conversion efficiency is improved, while eliminating the escaping of the optical path as caused by nonlinear optical crystal refractive index, guarantees entire wavelength tune
The spatial stability of output beam in humorous range, the normal direction and nonlinear optical crystal 301 of high reflectance hysteroscope 302 export
Pump direction be equipped with default angle, the size of the angle is generally no greater than 0.3 °, and high reflectance hysteroscope 302 is leaned on as far as possible
Nearly nonlinear optical crystal 301 makes to reflect the pump light returned in nonlinear optical crystal 301 through high reflectance hysteroscope 302
, close to being overlapped, quasi- conllinear round trip pumping is realized, namely generate the quasi- conllinear pump light of two beams, two beam standards are total with incident pump light in portion
Line pump light can carry out nonlinear optics conversion to the signal light and ideler frequency light of generation in nonlinear optical crystal 301 and put
Greatly, the signal light of generation and ideler frequency light pass sequentially through the dichroic mirror 208 and output coupling mirror 303 exports.High reflectance simultaneously
The pump light that the reflection of hysteroscope 302 returns obtains the deviation for being greater than pumping optical beam spot diameter in above-mentioned pumping light control device 200
Distance prevents the pump light returned damage pumping laser source device 100 so as to be absorbed by a high energy absorption diaphragm 202.This
In inventive embodiments, high reflectance hysteroscope 302 to wavelength be 532nm pump light, newly-generated signal light and ideler frequency light simultaneously
With the reflectivity for being greater than 96%, output coupling mirror 303 is the output device of signal light, and the transmissivity to signal light is about
50%, 50% is not more than to the transmissivity of ideler frequency light, the high reflectance hysteroscope 302 and output coupling mirror 303 are placed in parallel, spacing
For 7cm, a resonant cavity is formed, high reflectance hysteroscope 302 returns to the pump light that wavelength is 532nm, makes wavelength 532nm's
Pump light passes through ktp crystal twice back and forth, realizes round trip pumping, and eliminates the optical path as caused by the ktp crystal refractive index and walk
From guaranteeing the spatial stability of outgoing laser beam in entire wavelength tuning range.The reflecting surface and KTP of high reflectance hysteroscope 302
Crystal namely 301 end face spacing of nonlinear optical crystal are 8mm, the normal direction and nonlinear optics of high reflectance hysteroscope 302
The angle of pump direction derived from crystal 301 is 0.2 °, and the pump light of the wavelength 532nm of return is inside the ktp crystal
It is approximate with incident wavelength 532nm pump light to be overlapped, realize quasi- conllinear round trip pumping, while the pump light of the wavelength 532nm returned
The deviation distance of 12mm is obtained at the high energy absorption diaphragm 202, and is fully absorbed by the high energy absorption diaphragm 202, is protected
The wavelength that card pumping laser source device 100 is not returned is that 532nm pumps light injury.
The resonator device 300 further includes electric actuator system 304, and upper surface is equipped with nonlinear optical crystal 301,
For driving nonlinear optical crystal 301 to rotate.
As shown in Figures 2 and 3, electric actuator system 304 includes crystal fixed column 3041, rotating arm 3042, turntable
3043, DC servo electric actuator 3044, reset spring 3045 and sapphire spacer 3046, wherein crystal fixed column
3041 for carrying nonlinear optical crystal 301, and crystal fixed column 3041 is fixed on one end of rotating arm 3042, rotating arm 3042
Axis is connected to turntable 3043, which is process by SS304 stainless steel, and DC servo electric actuator 3044 passes through blue precious
Stone gasket 3046 is vertical with the other end of rotating arm 3042 to be connect, and one end of reset spring 3045 and one end of rotating arm 3042 are hung down
Direct-connected to connect, the other end of reset spring 3045 is fixed.DC servo electric actuator 3044 combines reset spring 3045 to push rotation
Pivoted arm 3042 drives turntable 3043, and then realizes the accurate adjusting to ktp crystal optical axis direction and pump beam angular separation,
Realize that the wavelength tuning to output laser, rotating arm 3042 and 3044 contact position of DC servo electric actuator are equipped with a piece of indigo plant
Jewel gasket 3046 prevents the precession damage rotating arm 3042 on 3044 top of DC servo electric actuator when long-term work from contacting
Face guarantees the stability of the long-term work tuned to ktp crystal optical axis direction.
The light that output coupling mirror 303 exports further includes remnant pump light, and optical parametric oscillator further includes monitoring control system
System 400, the monitor control system 400 include the first filter 401, the second filter 402 and ideler frequency light high reflection mirror 403,
Wherein, the first filter 401 is preferably that long wave leads to filter for filtration residue pump light, the first colour filter in the embodiment of the present invention
Mirror 401 is greater than 99% to the reflectivity of the remnant pump light of wavelength 532nm, and the remnant pump light of reflection is sent to laser energy
It measures collector 205 to collect, 96% is greater than to the transmitance of the nonlinear optics conversion signal light generated and ideler frequency light, and will filtering
Light beam afterwards is sent to the second filter 402；The second filter 402 is preferably that short-pass filter is used in the embodiment of the present invention
Ideler frequency light and signal light are separated, the second filter 402 is greater than 99% to the reflectivity of ideler frequency light, and big to the transmissivity of signal light
In 98%, the separation of signal light and ideler frequency light is realized, and ideler frequency light is sent to the reflection output of ideler frequency light high reflection mirror 403.
The monitor control system 400 further includes beam sampling mirror 404, fiber spectrometer 405, control computer 406 and promotees
Dynamic device controller 407, wherein beam sampling mirror 404 is for reflective portion signal light to fiber spectrometer 405, fiber spectrometer
405 are used for the wavelength of measuring signal light, and control computer 406 is controlled for real-time display wavelength and using actuator control 407
Electric actuator system 304 rotates, and realizes the real-time online positioning and continuous scanning of wavelength.
Particular embodiments described above has carried out further in detail the purpose of the present invention, technical scheme and beneficial effects
It describes in detail bright, it should be understood that the above is only a specific embodiment of the present invention, is not intended to restrict the invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution, improvement and etc. done should be included in guarantor of the invention
Within the scope of shield.
Claims (10)
1. a kind of optical parametric oscillator, comprising:
Pumping laser source device (100), for generating pump light；
It pumps light control device (200), spot size and polarization direction for receiving the pump light, and to the pump light
It is adjusted, including dichroic mirror (208), and the pump light after adjusting is exported by the dichroic mirror (208)；
Resonator device (300), including nonlinear optical crystal (301), high reflectance hysteroscope (302) and output coupling mirror
(303), wherein the nonlinear optical crystal (301) is set to the high reflectance hysteroscope (302) and output coupling mirror (303)
Between, the dichroic mirror (208) is set between the output coupling mirror (303) and nonlinear optical crystal (301), described non-thread
Property optical crystal (301) for receive pump light derived from the dichroic mirror (208) and realize nonlinear optics conversion generate letter
Number light and ideler frequency light, and exported to high reflectance hysteroscope (302)；The normal direction of the high reflectance hysteroscope (302) with
The pump direction is equipped with default angle, for reflected pump light to nonlinear optical crystal (301), so that the reflection
Pump light and incident pump light form quasi- conllinear, the signal light of the quasi- conllinear pumping photogenerated of two beam and spare time in crystals
Frequency light passes sequentially through the dichroic mirror (208) and output coupling mirror (303) output.
2. optical parametric oscillator according to claim 1, the pumping light control device (200) along optical path direction also according to
Secondary includes high energy absorption diaphragm (202), polarizing beam splitter cube (204), lens (207), and the polarizing beam splitter cube
(204) it is respectively the first half-wave plate and the second half-wave plate that front and back, which respectively sets half of wave plate (203), and first half-wave plate and second
Half-wave plate is rotatable, respectively set before and after the lens (207) a light path calibration diaphragm (206) be respectively the first light path calibration diaphragm and
Second light path calibration diaphragm, wherein high energy absorption diaphragm (202) is used to limit the spot size of the pump light and absorbs warp
Pump light after the deviation of resonant cavity optical path, with the pumping light injury for protecting the pumping laser source device (100) not to be returned；Half
Wave plate (203) is used to rotate the linear polarization of the pump light；Polarizing beam splitter cube (204) is used for the pump light
Horizontal polarization composition and vertical polarized component separate, and the vertical polarized component of the pump light is sent to the second half-wave plate；
Light path calibration diaphragm (206) is for calibrating pumping optical path；Lens (207) are used to adjust the spot size of the pump light；It is described
The pump light being emitted from the second light path calibration diaphragm is exported by the dichroic mirror (208).
3. optical parametric oscillator according to claim 2, the lens (207) include plano-convex lens (2071) and plano-concave
The planar section of lens (2072), the plano-convex lens (2071) and plano-concave lens (2072) is opposite to be arranged in parallel and between it
Distance is the sum of the focal length of the plano-convex lens (2071) and plano-concave lens (2072).
4. optical parametric oscillator according to claim 1, the normal direction of the high reflectance hysteroscope (302) with it is described
Pump direction is equipped with default angle and is less than or equal to 0.3 °.
5. optical parametric oscillator according to claim 1, the resonator device (300) further includes electric actuator system
It unites (304), upper surface is equipped with the nonlinear optical crystal (301), for driving the nonlinear optical crystal (301) to revolve
Turn.
6. optical parametric oscillator according to claim 5, the electric actuator system (304) includes crystal fixed column
(3041), rotating arm (3042), turntable (3043), DC servo electric actuator (3044), reset spring (3045) and
Sapphire spacer (3046), wherein crystal fixed column (3041) is for carrying the nonlinear optical crystal (301), the crystalline substance
Body fixed column (3041) is fixed on one end of the rotating arm (3042), and rotating arm (3042) axis is connected to the turntable
(3043), DC servo electric actuator (3044) passes through the another of the sapphire spacer (3046) and the rotating arm (3042)
One end vertically connects, and one end of the reset spring (3045) is vertical with one end of the rotating arm (3042) to be connect, described multiple
The other end of position spring 3045 is fixed.
7. the light of optical parametric oscillator according to claim 1, output coupling mirror (303) output further includes remnant pump
Light, the optical parametric oscillator further include monitor control system (400), and the monitor control system (400) includes the first filter
Look mirror (401), the second filter (402) and ideler frequency light high reflection mirror (403), wherein the first filter (401) is for filtering
The remnant pump light, and filtered light beam is sent to second filter (402), second filter (402)
The ideler frequency light high reflection mirror (403) is sent to for separating the ideler frequency light and signal light, and by the ideler frequency light.
8. optical parametric oscillator according to claim 7, the monitor control system (400) further includes beam sampling mirror
(404), fiber spectrometer (405), control computer (406) and actuator control (407), wherein beam sampling mirror (404)
For signal light described in reflective portion to the fiber spectrometer (405), the fiber spectrometer (405) is for measuring the letter
The wavelength of number light, the control computer (406) are controlled for wavelength described in real-time display and using the actuator control (407)
Make electric actuator system (304) rotation.
9. optical parametric oscillator according to claim 7, the pumping light control device (200) further includes laser energy
Collector (205), it is inclined for collecting the level that the remnant pump light and the polarizing beam splitter cube (204) separate
Shake pump light.
10. optical parametric oscillator according to claim 1, the pumping light control device (200) further includes multiple high
Reflecting mirror (201), for changing the direction of the pump light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910421535.9A CN110112642B (en) | 2019-05-20 | 2019-05-20 | Optical parametric oscillator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910421535.9A CN110112642B (en) | 2019-05-20 | 2019-05-20 | Optical parametric oscillator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110112642A true CN110112642A (en) | 2019-08-09 |
| CN110112642B CN110112642B (en) | 2024-04-02 |
Family
ID=67491274
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910421535.9A Active CN110112642B (en) | 2019-05-20 | 2019-05-20 | Optical parametric oscillator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110112642B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110571639A (en) * | 2019-09-29 | 2019-12-13 | 中国科学技术大学 | nanosecond pulse narrow-linewidth optical parametric oscillator for seed light injection |
| CN111796606A (en) * | 2020-05-29 | 2020-10-20 | 湖北三江航天万峰科技发展有限公司 | Two-dimensional turntable follow-up control system and method based on armature direct current motor |
| CN113048969A (en) * | 2021-01-08 | 2021-06-29 | 中国船舶重工集团公司第七0七研究所 | Small entanglement source for polarization entangled photon pair output of fiber-optic gyroscope and adjusting method |
| CN113189566A (en) * | 2021-04-29 | 2021-07-30 | 深圳市京湾量子遥感科技有限公司 | Quantum laser radar system based on quantum light field and control method thereof |
| CN114486739A (en) * | 2022-01-25 | 2022-05-13 | 山东大学 | Z-scan measuring device and method for measuring nonlinear optical coefficient |
| CN114486739B (en) * | 2022-01-25 | 2024-06-11 | 山东大学 | Z-scan measuring device and measuring method for measuring nonlinear optical coefficient |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6215800B1 (en) * | 1998-01-14 | 2001-04-10 | Northrop Grumman Corporation | Optical parametric oscillator with dynamic output coupler |
| KR20050017269A (en) * | 2003-08-12 | 2005-02-22 | 학교법인단국대학 | Laser system for producing infrared radiation for skin or teeth treatment |
| JP2010204507A (en) * | 2009-03-05 | 2010-09-16 | Nippon Signal Co Ltd:The | Optical parametric oscillator |
| CN105514788A (en) * | 2016-01-25 | 2016-04-20 | 中国工程物理研究院应用电子学研究所 | Mid-infrared optical parameter oscillator of slab pump |
| CN106785848A (en) * | 2016-12-20 | 2017-05-31 | 深圳大学 | A kind of tunable dual wavelength Ultrafast light parameter oscillator |
| CN106814516A (en) * | 2017-03-31 | 2017-06-09 | 华中科技大学 | A kind of continuous wave optical parametric oscillator of pumping resonance |
| CN106992426A (en) * | 2017-04-18 | 2017-07-28 | 华中科技大学 | A kind of intracavity pump optical parametric oscillator of Single-end output |
| CN210007100U (en) * | 2019-05-20 | 2020-01-31 | 中国科学技术大学 | kinds of optical parametric oscillator |
-
2019
- 2019-05-20 CN CN201910421535.9A patent/CN110112642B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6215800B1 (en) * | 1998-01-14 | 2001-04-10 | Northrop Grumman Corporation | Optical parametric oscillator with dynamic output coupler |
| KR20050017269A (en) * | 2003-08-12 | 2005-02-22 | 학교법인단국대학 | Laser system for producing infrared radiation for skin or teeth treatment |
| JP2010204507A (en) * | 2009-03-05 | 2010-09-16 | Nippon Signal Co Ltd:The | Optical parametric oscillator |
| CN105514788A (en) * | 2016-01-25 | 2016-04-20 | 中国工程物理研究院应用电子学研究所 | Mid-infrared optical parameter oscillator of slab pump |
| CN106785848A (en) * | 2016-12-20 | 2017-05-31 | 深圳大学 | A kind of tunable dual wavelength Ultrafast light parameter oscillator |
| CN106814516A (en) * | 2017-03-31 | 2017-06-09 | 华中科技大学 | A kind of continuous wave optical parametric oscillator of pumping resonance |
| CN106992426A (en) * | 2017-04-18 | 2017-07-28 | 华中科技大学 | A kind of intracavity pump optical parametric oscillator of Single-end output |
| CN210007100U (en) * | 2019-05-20 | 2020-01-31 | 中国科学技术大学 | kinds of optical parametric oscillator |
Non-Patent Citations (2)
| Title |
|---|
| 王晓敏, 张腊花, 马明俊, 王纪光, 吴路生: "温度调谐的MgO∶LiNbO_3光学参量振荡器", 激光与红外, no. 09 * |
| 聂丹丹;李渊骥;冯晋霞;张宽收;: "利用单共振光学参量振荡器产生宽调谐高功率连续单频红外激光", 中国激光, no. 04 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110571639A (en) * | 2019-09-29 | 2019-12-13 | 中国科学技术大学 | nanosecond pulse narrow-linewidth optical parametric oscillator for seed light injection |
| CN110571639B (en) * | 2019-09-29 | 2024-05-17 | 中国科学技术大学 | Nanosecond pulse narrow linewidth optical parametric oscillator for seed light injection |
| CN111796606A (en) * | 2020-05-29 | 2020-10-20 | 湖北三江航天万峰科技发展有限公司 | Two-dimensional turntable follow-up control system and method based on armature direct current motor |
| CN113048969A (en) * | 2021-01-08 | 2021-06-29 | 中国船舶重工集团公司第七0七研究所 | Small entanglement source for polarization entangled photon pair output of fiber-optic gyroscope and adjusting method |
| CN113189566A (en) * | 2021-04-29 | 2021-07-30 | 深圳市京湾量子遥感科技有限公司 | Quantum laser radar system based on quantum light field and control method thereof |
| CN113189566B (en) * | 2021-04-29 | 2024-05-24 | 毕思文 | Quantum laser radar system based on quantum light field and control method thereof |
| CN114486739A (en) * | 2022-01-25 | 2022-05-13 | 山东大学 | Z-scan measuring device and method for measuring nonlinear optical coefficient |
| CN114486739B (en) * | 2022-01-25 | 2024-06-11 | 山东大学 | Z-scan measuring device and measuring method for measuring nonlinear optical coefficient |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110112642B (en) | 2024-04-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110112642A (en) | A kind of optical parametric oscillator | |
| Zimmermann et al. | All solid state laser source for tunable blue and ultraviolet radiation | |
| Major et al. | Green sub-nanosecond microchip laser based on BiBO crystals | |
| Friedenauer et al. | High power all solid state laser system near 280 nm | |
| CN109066280A (en) | A kind of power proportions and pulse spacing adjustable dual wavelength light parametric oscillator | |
| CN109632128B (en) | Device and method for measuring double-resonance temperature condition of optical cavity | |
| KR101633154B1 (en) | Arrangement and method for the frequency conversion of laser radiation | |
| TW200535542A (en) | Narrow bandwidth high repetition rate optical parametric oscillator | |
| CN110571639B (en) | Nanosecond pulse narrow linewidth optical parametric oscillator for seed light injection | |
| CN103545706B (en) | A kind of all solid state 355nm lasers | |
| CN101777724A (en) | End-pumped dual-wavelength coaxial switching output Q-switched base-frequency and double-frequency laser | |
| CN107658687B (en) | Self-starting femtosecond titanium gem laser oscillator of synchronous pump | |
| JP2016218373A (en) | Multiwavelength oscillation type optical parametric oscillation device and multiwavelength oscillation type optical parametric oscillation method | |
| CN210007100U (en) | kinds of optical parametric oscillator | |
| CN104158077A (en) | Rapid tuning terahertz parametric oscillation radiation source device and method based on rowland circle | |
| Song et al. | Harmonically pump a femtosecond optical parametric oscillator to 1.13 GHz by a femtosecond 515 nm laser | |
| CN210040868U (en) | Tunable laser capable of simultaneously outputting near infrared and mid-infrared | |
| CN104283103A (en) | Optical parametric oscillator capable of outputting wide-waveband and tunable continuous waves with wave length of 530-780 nm | |
| US10156771B2 (en) | Optical parametric oscillator | |
| CN213602178U (en) | Parameter oscillation optical system | |
| CN211351244U (en) | Nanosecond pulse narrow-linewidth optical parametric oscillator for seed light injection | |
| Kolker et al. | A nanosecond optical parametric oscillator in the mid-IR region with double-pass pump | |
| CN208707068U (en) | A kind of power proportions and pulse spacing adjustable dual wavelength light parametric oscillator | |
| CN204230626U (en) | Broadband tunable continuous wave 530-780nm optical parametric oscillator | |
| US9170470B1 (en) | Non-planer, image rotating optical parametric oscillator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |