CN106814516A - A kind of continuous wave optical parametric oscillator of pumping resonance - Google Patents
A kind of continuous wave optical parametric oscillator of pumping resonance Download PDFInfo
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- CN106814516A CN106814516A CN201710208120.4A CN201710208120A CN106814516A CN 106814516 A CN106814516 A CN 106814516A CN 201710208120 A CN201710208120 A CN 201710208120A CN 106814516 A CN106814516 A CN 106814516A
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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
- G02F1/353—Frequency conversion, i.e. wherein a light beam is generated with frequency components different from those of the incident light beams
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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
- G02F1/3501—Constructional details or arrangements of non-linear optical devices, e.g. shape of non-linear crystals
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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
- G02F1/355—Non-linear optics characterised by the materials used
- G02F1/3551—Crystals
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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
- G02F1/3501—Constructional details or arrangements of non-linear optical devices, e.g. shape of non-linear crystals
- G02F1/3503—Structural association of optical elements, e.g. lenses, with the non-linear optical device
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- Optics & Photonics (AREA)
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- Crystallography & Structural Chemistry (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
The invention discloses a kind of continuous wave optical parametric oscillator of pumping resonance, including：Single-frequency pump laser, beam collimation unit, the first optoisolator, pumping Input coupling mirror, the first concave mirror, nonlinear crystal, the second concave mirror, dichroic mirror, optical band pass filter and OPO flashlight output coupling mirrors.Be placed directly within nonlinear crystal between two concave mirrors by the present invention, by the concave mirror from short focus, can obtain the facula area of smaller signal and pump light；The chamber for increasing signal optical cavity and pumping optical cavity using refrative cavity is long, can further reduce the facula area of signal and pump light in nonlinear crystal, realizes extremely low oscillation threshold, and its oscillation threshold can be even below 30 milliwatts less than 60 milliwatts.The continuous wave optical parametric oscillator of Low threshold can reduce the power requirement to pumping laser, and structure is relatively easy, it is easy to accomplish minimize and practical.
Description
Technical field
The present invention relates to optical parametric oscillator field, shaken more particularly, to a kind of continuous wave optical parameter of pumping resonance
Swing device.
Background technology
Optical parametric oscillator (optical parametric oscillator, abbreviation OPO) is imitated using second nonlinear
Should, by incident laser, referred to as pump light is converted to two different shoot lasers of frequency, and one of frequency the higher person is referred to as letter
Number light, another frequency it is more relatively low be referred to as ideler frequency light, the frequency of pump light is equal to the frequency sum of flashlight and ideler frequency light；Light
Parametric oscillator is used to expand the output waveband of laser emission, produces the laser emission of wideband adjustable.
Continuous wave optical parametric oscillator is typically using fiber amplifier as pumping source；Using more long period polarized non-
Linear crystal, such as period polarized lithium columbate crystal (Periodically poled lithium niobate, abbreviation
PPLN), as gain media to reduce oscillation threshold, now oscillation threshold is generally 2-3W.Typical continuous wave single resonance
The configuration of optical parametric oscillator and experimental result such as document E.Andrieux, T.Zanon, M.Cadoret, A.Rihan, and
J.-J.Zondy, " 500GHz mode-hop-free idler tuning range with a frequency-
Stabilized singly resonant optical parametric oscillator, " Opt.Lett.36,1212-
Shown in 1214 (2011).
Using pumping harmonic technology so that pump laser vibrates in resonator, can be obtained in optical parametric oscillator
The pump power density of get Geng Gao, is greatly lowered the oscillation threshold of continuous wave optical parametric oscillator.Experiment at present is obtained
The oscillation threshold of the continuous wave optical parametric oscillator of pumping resonance is 400 milliwatts or so.The continuous glistening light of waves of typical pumping resonance
The configuration of parametric oscillator and experimental result such as document F.Muller, A.Popp, F.Kuhnemann, and S.Schiller,
" Transportable, highly-sensitive photoacoustic spectrometer based on a
Continuous-wave dual-cavity optical parametric oscillator, " Opt.Express 11,
Shown in 2820-25 (2003).
At present, the oscillation threshold using the continuous wave optical parametric oscillator of pumping harmonic technology is still higher, and this is mainly
Because facula area of the pump light of optical parametric oscillator in existing configuration is larger；Need to use a watt single-frequency for level power output
Laser and power amplifying system are used as pumping source, thus pumping system complexity is high, and volume is bigger than normal.
The content of the invention
It is an object of the invention to provide a kind of continuous wave of lower oscillation threshold (60 milliwatts even 30 milliwatts can be less than)
Optical parametric oscillator, overcomes prior art oscillation threshold higher and the problem high to pumping system demanded power output.
The invention provides a kind of continuous wave optical parametric oscillator of pumping resonance, including：Single-frequency pump laser, light beam
Collimation unit, the first optoisolator, pumping Input coupling mirror, the first concave mirror, nonlinear crystal, the second concave mirror, dichroic mirror,
Optical band pass filter and OPO flashlight output coupling mirrors；Single-frequency pump laser launches OPO pump lights, OPO as pumping source
Pump light collimated through beam collimation unit after again by after the optoisolator, the OPO pump lights after collimation are sequentially passed through
Pumping Input coupling mirror, the first concave mirror, nonlinear crystal, the second concave mirror and dichroic mirror, and by pumping Input coupling mirror,
Vibration is formed in the first resonator that first concave mirror, nonlinear crystal, the second concave mirror and dichroic mirror are constituted；In the first resonance
The pump light vibrated in chamber produces OPO flashlights and OPO ideler frequency lights by nonlinear crystal；OPO flashlights are input into by pumping
Coupling mirror, the first concave mirror, nonlinear crystal, the second concave mirror, dichroic mirror, optical band pass filter and OPO signal light outputs
Vibration is formed in the second resonator that coupling mirror is constituted；The pump light vibrated in the second resonator is produced by nonlinear crystal
Raw OPO flashlights and OPO ideler frequency lights；OPO flashlights are exported by OPO flashlights output coupling mirror, and OPO ideler frequency lights are by first
Concave mirror and the second concave mirror are exported respectively.
Further, the reflection of pumping Input coupling mirror plating OPO pump lights part, flashlight high-reflecting film；Described first is recessed
Face mirror and the second concave mirror plate OPO pump lights and flashlight anti-, ideler frequency light anti-reflection film high；The dichroic mirror plates OPO pump lights
Anti-, flashlight anti-reflection film high；The OPO flashlights output coupling mirror plating OPO flashlights part reflectance coating；The nonlinear crystal
Plating OPO pumpings, signal and ideler frequency light anti-reflection film；Wherein, high-reflecting film refers to film of the power reflectance more than 99%, and anti-reflection film refers to
Film of the power transmittance more than 97%, part reflectance coating refers to film of the reflectivity less than 15%.
Further, beam collimation unit is used for collimation of the realization to the single-frequency pump laser, and by changing
The radius of pump spot realizes matching for pumping laser and OPO pumping optical cavity spatial models.
Further, nonlinear crystal be period polarized lithium columbate crystal, potassium titanyl oxygenic phosphate(KTP) crystal or other can produce
The crystal of raw non-linear gain.
Further, continuous wave optical parametric oscillator also includes pump cavity feedback control module long, for keeping described
The resonance state of single-frequency pump laser and OPO pumping optical cavities.
Further, pump cavity feedback control module long includes：Low pass filter, frequency mixer, bubble Ke Ersi rooms, second
Optoisolator, servo amplifier, oscillator, phase-shifter and photodetector；Pump light after collimation sequentially passes through the farad
Isolator, vibrates behind bubble Ke Ersi rooms and the second optoisolator in first resonator, the part light warp for reflecting
The output of pumping Input coupling mirror is crossed, then by being received by photon detector after the second optoisolator and produces electric signal, the telecommunications
Number it is transferred to frequency mixer；Oscillator produces the part in disturbing signal to act on bubble Ke Ersi rooms, and another part is by phase shift
Frequency mixer is transferred to after device and the electric signal from photodetector is mixed, by the signal transmission after mixing to low
Bandpass filter, servo amplifier is transferred to by the low frequency signal of low pass filter, by the amplification signal after servo amplifier
For controlling and adjusting the single-frequency pump laser.
Further, the second optoisolator includes：The polarization spectroscope and quarter-wave plate for setting gradually, polarization point
Input light is become light microscopic the line polarisation of particular polarization, and has beam splitting to act on light；Quarter-wave plate is used for will
Polarization direction becomes rotatory polarization with quarter-wave plate into the incident line polarisation at 45 degree of angles, it is also possible to become the rotatory polarization of input
Polarization direction and quarter-wave plate into 45 degree of line polarisations at angle.
Further, nonlinear crystal is placed in OPO pumping optical cavities, and the pump light vibrated in chamber is by described non-
Linear crystal, can produce the gain of OPO flashlights and ideler frequency light；OPO flashlights are by the pumping Input coupling mirror, described
One concave mirror, the nonlinear crystal, second concave mirror, the dichroic mirror, the optical band pass filter and the OPO
Vibration is formed in the signal optical cavity of the OPO that flashlight output coupling mirror is constituted, the OPO flashlights of generation are by described
OPO flashlights output coupling mirror is exported, and the OPO ideler frequency lights of generation are defeated by first concave mirror and second concave mirror
Go out；It is to realize OPO signals and pump light described non-linear using the purpose of first concave mirror and second concave mirror
Focusing in crystal, to reduce the oscillation threshold of OPO.
Further, single-frequency pump laser can be single-frequency semiconductor, solid or optical fiber laser, or single-frequency laser
Device and amplifier system.Optoisolator is reflected back to the single-frequency pump laser for suppressing pumping laser.Pumping is input into
Coupling mirror is used to realize the coupling of the single-frequency pump laser to OPO pumping optical cavities.By the pumping Input coupling mirror
It is set as in OPO pumping optical cavities other original papers in addition to the pumping Input coupling mirror to the reflectivity of OPO pump lights
To the loss by one path sum of OPO pump lights, optimal pump light input coupling efficiency is capable of achieving.Optical band pass filter is used for real
Can be Fabry-Perot to realize to the single-frequency selection of OPO flashlights and wavelength tuning now to the bandpass filtering of OPO flashlights
Sieve chamber, Birefringent Filter or other optical filtering elements.
It is of the invention compared with the continuous wave optical parametric oscillator of existing use pumping harmonic technology, the present invention will be non-linear
Crystal is placed directly between two concave mirrors, by the concave mirror from short focus, can obtain smaller OPO signals and pumping
The facula area of light；The chamber for increasing OPO signals optical cavity and pumping optical cavity using refrative cavity is long, can further reduce OPO signals
Facula area with pump light in nonlinear crystal, realizes extremely low OPO oscillation thresholds, and its oscillation threshold can be less than 60 milliwatts
Even below 30 milliwatts.The continuous wave optical parametric oscillator of Low threshold can reduce the power requirement to pumping laser, structure phase
To simple, it is easy to accomplish minimize and practical.
Brief description of the drawings
Fig. 1 is the structural representation of the continuous wave optical parametric oscillator of pumping resonance provided in an embodiment of the present invention.
Fig. 2 be pumping resonance provided in an embodiment of the present invention continuous wave optical parametric oscillator in pump cavity feedback control long
The concrete structure schematic diagram of module.
Wherein, 1 be single-frequency pump laser, 2 be beam collimation unit, 3 be the first optoisolator, 4 be pumping be input into coupling
Close mirror, 5 be the first concave mirror, 6 be nonlinear crystal, 7 be the second concave mirror, 8 be dichroic mirror, 9 be optical band pass filter, 10
For OPO flashlights output coupling mirror, 11 are low pass filter, 12 are frequency mixer, 13 for bubble Ke Ersi rooms, 14 are second optically isolated
Device, 15 be servo amplifier, 16 be oscillator, 17 be phase-shifter, 18 be photodetector.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only used for explaining the present invention, not
For limiting the present invention.As long as additionally, technical characteristic involved in invention described below each implementation method that
Conflict is not constituted between this can be just mutually combined.
Be placed directly within nonlinear crystal between two concave mirrors by the present invention, by the concave mirror from short focus, can be with
The facula area of the smaller OPO signals of acquisition and pump light；Increase the chamber of OPO signals optical cavity and pumping optical cavity using refrative cavity
It is long, the facula area of OPO signals and pump light in nonlinear crystal can be further reduced, realize extremely low OPO vibration thresholds
Value, its oscillation threshold can be even below 30 milliwatts less than 60 milliwatts.The continuous wave optical parametric oscillator of Low threshold can reduce right
The power requirement of pumping laser, structure is relatively easy, it is easy to accomplish minimize and practical.
The continuous wave optical parametric oscillator of the pumping resonance includes：Single-frequency pump laser 1, beam collimation unit 2, light every
From device 3, pumping Input coupling mirror 4, the first concave mirror 5, nonlinear crystal 6, the second concave mirror 7, the filter of dichroic mirror 8, optical band pass
Ripple device 9, OPO flashlights output coupling mirror 10 and pump cavity feedback control module long, wherein,
Single-frequency pump laser 1 as optical parametric oscillator pumping source, through beam collimation unit 2 and the optoisolator
After 3, OPO pump lights sequentially pass through pumping Input coupling mirror 4, the first concave mirror 5, nonlinear crystal 6, the second concave mirror 7 and double
Look mirror 8, and by pumping Input coupling mirror 4, the first concave mirror 5, nonlinear crystal 6, the second concave mirror 7 and the structure of dichroic mirror 8
Into resonator in formed vibration.The pump light vibrated in chamber can produce OPO flashlights and ideler frequency light by nonlinear crystal 6
Gain；OPO flashlights are sequentially passed through by pumping Input coupling mirror 4, the first concave mirror 5, nonlinear crystal 6, the second concave mirror
7th, dichroic mirror 8, optical band pass filter 9 and OPO flashlights output coupling mirror 10, and by pumping Input coupling mirror 4, first
Concave mirror 5, nonlinear crystal 6, the second concave mirror 7, dichroic mirror 8, optical band pass filter 9 and OPO flashlight output coupling mirrors
Vibration is formed in the signal optical cavity of 10 OPO for being constituted.The effect of resonator is that the light allowed in chamber can obtain positive feedback,
Selecting can be in the light of the wavelength of resonator interior resonance.The OPO flashlights of generation are defeated by OPO flashlights output coupling mirror 10
Go out, the OPO ideler frequency lights of generation are exported by the first concave mirror 5 and the second concave mirror 7；Using the first concave mirror 5 and the second concave surface
The purpose of mirror 7 is the focusing for realizing OPO signals and pump light in nonlinear crystal 6, and flashlight and pump light are in crystal cohesion
It is burnt so that both light are small in the facula area of crystals, if both light can not be focused in nonlinear crystal 6, by
In the facula area of focal position be minimum, so the light of flashlight and pump light in nonlinear crystal 6 can be caused
Facula area of the spot area than both light simultaneously in 6 inner focusing of nonlinear crystal is big.According to document Robert
W.Boyd, Nonlinear Optics 3rd ed. are it is understood that facula area of the light beam for resonating in nonlinear crystal 6 is got over
Small, oscillation threshold is just smaller.So OPO flashlights and pump light can reduce the vibration threshold of OPO in the inner focusing of nonlinear crystal 6
Value.
Pumping Input coupling mirror 4 as pump light Input coupling mirror while also serve as one of pumping optical cavity end
Face speculum so that pump light is reflected and cause pump light by pump light in intra resonant cavity roundtrip, the first concave mirror 5
Assemble, the effect of nonlinear crystal 6 is to produce ideler frequency light using second order nonlinear effect, and the second concave mirror 7 reflects pump light
And cause that pump light is assembled, the reflected pump light of dichroic mirror 8 causes that flashlight is passed through simultaneously；By the position for adjusting dichroic mirror 8
Chamber to change OPO pumping optical cavities is long, or adjusts the wavelength of single-frequency pump laser 1 so that pump light is in OPO pump lights
Vibrated in resonator, enhanced pumping light power density is realized in OPO resonators；By pump cavity feedback control module long come
Keep the resonance state of single-frequency pump laser 1 and OPO pumping optical cavities.
In embodiments of the present invention, the plating OPO pumpings of pumping Input coupling mirror 4 light reflectivity is 96% and flashlight reflects
Film of the rate more than 99.5%；First concave mirror 5 is identical with the film that the second concave mirror 7 is plated, and plates OPO pump lights and flashlight reflection
Rate is both greater than the film of the reflectivity less than 20% of 99.5% and ideler frequency light；The plating OPO pumping light reflectivities of dichroic mirror 8 are more than
99.5% and signal light reflectivity less than 0.5% film；OPO flashlights output coupling mirror 10 plates OPO signal light reflectivities
95% film；6 two surfaces of nonlinear crystal all plate the reflection for causing OPO pump lights, flashlight and ideler frequency light these three light
Rate is both less than 2% film.
From the concave mirror of short focus, the present embodiment selection uses the concave mirror that radius of curvature is 75 millimeters.Concave mirror is bent
The overall principle of the selection of rate radius is so that oscillation threshold is relatively low.
Used as one embodiment of the present of invention, nonlinear crystal 6 can select PPLN, when the pump light (i.e. laser) of OPO
Wavelength be 1040 nanometers, when the polarization cycle of PPLN is 30.2 microns, the wavelength of flashlight and ideler frequency light is respectively 1517 and receives
Rice and 3305 nanometers.The wavelength of OPO pump lights is locked, the signal light wavelength of OPO is changed by tuning optical band pass filter 9
And the polarization cycle or temperature of synchronous change PPLN, it is possible to achieve the tuning of ideler frequency optical wavelength is exported to OPO.
In embodiments of the present invention, single-frequency pump laser 1 can be single-frequency semiconductor, solid or optical fiber laser, or
Single-frequency laser and amplifier system.Beam collimation unit 2 is used for collimation of the realization to single-frequency pump laser 1, and by changing
Become the radius of pump spot to realize matching for pumping laser and OPO pumping optical cavity spatial models.Optoisolator 3 is used to press down
Pumping laser processed is reflected back to the single-frequency pump laser.Pumping Input coupling mirror 4 is used to realize single-frequency pump laser 1
To the coupling of OPO pumping optical cavities.Pumping Input coupling mirror 4 is set as that OPO pump lights are humorous to the reflectivity of OPO pump lights
Other original papers shaken in chamber in addition to pumping Input coupling mirror 4 are capable of achieving optimal pump to the loss by one path sum of OPO pump lights
Pu light input coupling efficiency.Nonlinear crystal 6 can be period polarized lithium columbate crystal, potassium titanyl oxygenic phosphate(KTP) crystal or other energy
Produce the crystal of non-linear gain.Optical band pass filter 9 is used to realize the bandpass filtering to OPO flashlights, to realize to OPO
The single-frequency selection of flashlight and wavelength tuning, can be Fabry-Perot-type cavity, Birefringent Filter or other optically filterings unit
Part.
In embodiments of the present invention, pump cavity feedback control module long is used to realize the single-frequency pump laser 1 and OPO
The resonance state of pumping optical cavity, wherein, the pump light that single-frequency pump laser 1 is produced is after collimater 2 is collimated
Pump light, the pump light after collimation sequentially passes through faraday isolator 3, the bubble Ke Ersi rooms 13, and described second is optically isolated
Device 14, the second optoisolator 14 is made up of a polarization spectroscope and a quarter-wave plate, from the light out of isolator 14
By pumping Input coupling mirror 4, omitted below by pumping Input coupling mirror 4 by the pump light after pumping Input coupling mirror 4
Structure reflect, part light is exported by pumping Input coupling mirror 4, by after the second optoisolator 14, by photon detection
Device 18 is received, so that electric signal is produced, the electric signal transmission to frequency mixer 12.Oscillator 16 produces a disturbing signal, one
It is allocated as steeping Ke Ersi rooms, a part is by being transferred to frequency mixer 12 and electricity from photodetector 18 after phase-shifter 17
Signal is mixed, by the signal transmission after mixing to low pass filter 11, by the low frequency signal of low pass filter 11
Servo amplifier 15 is transferred to, single-frequency pump laser 1 can be directly acted on by the amplification signal after servo amplifier 15, risen
To the effect for controlling and adjusting single-frequency pump laser 1.
When pump cavity feedback control module long described by Fig. 2 is applied into the OPO described in Fig. 1, with reference to Fig. 1 and Tu
The annexation of light path and device in 2 combines each component of Fig. 1 and Fig. 2.Specifically, it is exactly in Fig. 1
Bubble Ke Ersi rooms 13 and the second optoisolator 14, low pass are added between the faraday isolator 3 and pumping Input coupling mirror 4 of description
Wave filter 11, frequency mixer 12, servo amplifier 15, oscillator 16, phase-shifter 17 and photodetector 18 are according to described by Fig. 2
Annexation is added in Fig. 1.
Pump cavity feedback control module long using the resonant frequency of resonator as reference frequency standard, using phase-modulation
Technology respectively produces a sideband in laser frequency both sides, and the optical signal after being reflected through reference cavity is compared with modulated signal
And after filter and amplification, the error signal that laser frequency deviates reference cavity resonant frequency is obtained, fed back using error signal drives and controlled
The a certain parameter of system fading margin laser processed makes laser frequency stabilization on the resonant frequency of optical resonator.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is all in essence of the invention
Any modification, equivalent and improvement made within god and principle etc., should be included within the scope of the present invention.
Claims (7)
1. a kind of continuous wave optical parametric oscillator of pumping resonance, it is characterised in that including：Single-frequency pump laser (1), light beam
Collimation unit (2), the first optoisolator (3), pumping Input coupling mirror (4), the first concave mirror (5), nonlinear crystal (6),
Two concave mirrors (7), dichroic mirror (8), optical band pass filter (9) and OPO flashlights output coupling mirror (10)；
Single-frequency pump laser (1) launches OPO pump lights as pumping source, and OPO pump lights carry out standard through beam collimation unit (2)
Again by after the optoisolator (3) after straight, the OPO pump lights after collimation sequentially pass through pumping Input coupling mirror (4), first recessed
Face mirror (5), nonlinear crystal (6), the second concave mirror (7) and dichroic mirror (8), and by pumping Input coupling mirror (4), first recessed
Vibration is formed in the first resonator that face mirror (5), nonlinear crystal (6), the second concave mirror (7) and dichroic mirror (8) are constituted；
The pump light vibrated in the first resonator produces OPO flashlights and OPO ideler frequency lights by nonlinear crystal (6)；OPO believes
Number light is by pumping Input coupling mirror (4), the first concave mirror (5), nonlinear crystal (6), the second concave mirror (7), dichroic mirror
(8) vibration, is formed in the second resonator that optical band pass filter (9) and OPO flashlights output coupling mirror (10) are constituted；
The pump light vibrated in the second resonator produces OPO flashlights and OPO ideler frequency lights by nonlinear crystal (6)；OPO believes
Number light is exported by OPO flashlights output coupling mirror (10), and OPO ideler frequency lights are by the first concave mirror (5) and the second concave mirror (7)
Export respectively.
2. continuous wave optical parametric oscillator as claimed in claim 1, it is characterised in that pumping Input coupling mirror (4) plating
The reflection of OPO pump lights part, flashlight high-reflecting film；First concave mirror (5) and the second concave mirror (7) plate OPO pump lights
Anti-, ideler frequency light anti-reflection film high with flashlight；Dichroic mirror (8) plating OPO pump lights anti-, the flashlight anti-reflection film high；The OPO letters
Number light output coupling mirror (10) plating OPO flashlights part reflectance coating；Nonlinear crystal (6) plating OPO pumpings, signal and ideler frequency
Light anti-reflection film；
Wherein, high-reflecting film refers to film of the power reflectance more than 99%, and anti-reflection film refers to film of the power transmittance more than 97%, portion
Reflectance coating is divided to refer to film of the reflectivity less than 15%.
3. continuous wave optical parametric oscillator as claimed in claim 1, it is characterised in that the beam collimation unit (2) is used for
The collimation to the single-frequency pump laser is realized, and pumping laser and OPO pumps are realized by changing the radius of pump spot
The matching of Pu optical cavity spatial model.
4. continuous wave optical parametric oscillator as claimed in claim 1, it is characterised in that the nonlinear crystal (6) is the cycle
The lithium columbate crystal of polarization, potassium titanyl oxygenic phosphate(KTP) crystal or other can produce the crystal of non-linear gain.
5. continuous wave optical parametric oscillator as claimed in claim 1, it is characterised in that the continuous wave optical parametric oscillator is also
Including pump cavity feedback control module long, the resonance shape for keeping the single-frequency pump laser and OPO pumping optical cavities
State.
6. continuous wave optical parametric oscillator as claimed in claim 5, it is characterised in that the pump cavity feedback control module long
Including：Low pass filter (11), frequency mixer (12), bubble Ke Ersi rooms (13), the second optoisolator (14), servo amplifier
(15), oscillator (16), phase-shifter (17) and photodetector (18)；
Pump light after collimation sequentially passes through the faraday isolator (3), bubble Ke Ersi rooms (13) and the second optoisolator
(14) vibrated in first resonator after, the part light for reflecting is exported by pumping Input coupling mirror (4), then is passed through
Received by photon detector (18) after second optoisolator (14) and produce electric signal, electric signal transmission to frequency mixer (12)；
Oscillator (16) produces the part in disturbing signal to act on bubble Ke Ersi rooms (13), and another part is by phase-shifter
(17) frequency mixer (12) is transferred to after and the electric signal from photodetector (18) is mixed, by the letter after mixing
Number low pass filter (11) is transferred to, servo amplifier (15) is transferred to by the low frequency signal of low pass filter (11), passed through
Amplification signal after servo amplifier (15) is used to control and adjust the single-frequency pump laser (1).
7. continuous wave optical parametric oscillator as claimed in claim 6, it is characterised in that the second optoisolator (14) bag
Include：Input light is become the polarization spectroscope and quarter-wave plate for setting gradually, polarization spectroscope the line of particular polarization
Polarisation, and there is beam splitting to act on light；Quarter-wave plate is used for polarization direction and quarter-wave plate into 45 degree of angles
Incident line polarisation becomes rotatory polarization, it is also possible to which the rotatory polarization of input is become into polarization direction and quarter-wave plate into 45 degree of angles
Line polarisation.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108963748A (en) * | 2018-06-13 | 2018-12-07 | 上海理工大学 | Multi-functional coherent Raman scattering bio-imaging light source |
| CN109038201A (en) * | 2018-08-30 | 2018-12-18 | 长春理工大学 | A kind of more optical parametric oscillators of energy component proportion active control |
| CN110112642A (en) * | 2019-05-20 | 2019-08-09 | 中国科学技术大学 | A kind of optical parametric oscillator |
| CN110571638A (en) * | 2019-08-16 | 2019-12-13 | 华中科技大学 | Broadband double-oscillation parametric oscillator for reflecting injected pump light |
| CN110716365A (en) * | 2019-11-28 | 2020-01-21 | 南京大学 | Frequency decorrelation polarization entanglement source preparation device based on reverse phase matching |
| CN110880670A (en) * | 2019-11-29 | 2020-03-13 | 山东大学 | High-efficiency optical parametric oscillator with adjustable threshold value |
| CN112054378A (en) * | 2020-09-15 | 2020-12-08 | 中国科学技术大学 | Optical parametric oscillation device with intracavity compensation and spectrometer |
| CN114628982A (en) * | 2020-12-11 | 2022-06-14 | 核工业理化工程研究院 | Parameter oscillation optical system and working method thereof |
| US11418162B2 (en) | 2020-01-22 | 2022-08-16 | International Business Machines Corporation | Band-pass Josephson traveling wave parametric amplifier |
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| CN108963748B (en) * | 2018-06-13 | 2020-07-17 | 上海理工大学 | Multifunctional coherent Raman scattering biological imaging light source |
| CN108963748A (en) * | 2018-06-13 | 2018-12-07 | 上海理工大学 | Multi-functional coherent Raman scattering bio-imaging light source |
| CN109038201A (en) * | 2018-08-30 | 2018-12-18 | 长春理工大学 | A kind of more optical parametric oscillators of energy component proportion active control |
| CN110112642A (en) * | 2019-05-20 | 2019-08-09 | 中国科学技术大学 | A kind of optical parametric oscillator |
| CN110112642B (en) * | 2019-05-20 | 2024-04-02 | 中国科学技术大学 | Optical parametric oscillator |
| CN110571638A (en) * | 2019-08-16 | 2019-12-13 | 华中科技大学 | Broadband double-oscillation parametric oscillator for reflecting injected pump light |
| CN110571638B (en) * | 2019-08-16 | 2021-11-02 | 华中科技大学 | Broadband double-oscillation parametric oscillator for reflecting injected pump light |
| CN110716365A (en) * | 2019-11-28 | 2020-01-21 | 南京大学 | Frequency decorrelation polarization entanglement source preparation device based on reverse phase matching |
| CN110880670A (en) * | 2019-11-29 | 2020-03-13 | 山东大学 | High-efficiency optical parametric oscillator with adjustable threshold value |
| US11418162B2 (en) | 2020-01-22 | 2022-08-16 | International Business Machines Corporation | Band-pass Josephson traveling wave parametric amplifier |
| US11949387B2 (en) | 2020-01-22 | 2024-04-02 | International Business Machines Corporation | Band-pass Josephson traveling wave parametric amplifier |
| CN112054378A (en) * | 2020-09-15 | 2020-12-08 | 中国科学技术大学 | Optical parametric oscillation device with intracavity compensation and spectrometer |
| CN112054378B (en) * | 2020-09-15 | 2022-09-06 | 中国科学技术大学 | Optical parametric oscillation device with intracavity compensation and spectrometer |
| CN114628982A (en) * | 2020-12-11 | 2022-06-14 | 核工业理化工程研究院 | Parameter oscillation optical system and working method thereof |
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