CN207946214U - Intermediate infrared high-reflection optical element testing device based on optical parametric oscillator - Google Patents
Intermediate infrared high-reflection optical element testing device based on optical parametric oscillator Download PDFInfo
- Publication number
- CN207946214U CN207946214U CN201820353314.3U CN201820353314U CN207946214U CN 207946214 U CN207946214 U CN 207946214U CN 201820353314 U CN201820353314 U CN 201820353314U CN 207946214 U CN207946214 U CN 207946214U
- Authority
- CN
- China
- Prior art keywords
- infrared
- mirror
- optical element
- light
- ideler frequency
- 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.)
- Active
Links
Landscapes
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
The intermediate infrared high-reflection optical element testing device based on the optical parametric oscillator comprises a near infrared fiber laser, a pumping coupling optical system, a high-reflection cavity mirror, a nonlinear variable frequency crystal, a dichroic mirror, an intermediate infrared high-reflection optical element to be tested, a coupling output mirror, an intermediate infrared spectroscope, a power meter, an intermediate infrared camera and a monitoring system; the high-reflection cavity mirror, the dichroic mirror, the intermediate infrared high-reflection optical element to be detected and the coupling output mirror form a resonant cavity of the closed-cavity optical parametric oscillator. The optical parametric oscillator based on the closed cavity type structure can realize the irradiation conditions of high power density, long time and intermediate infrared continuous laser in the resonant cavity, and can test the laser damage resistance of the intermediate infrared high reflection optical element. The utility model has the characteristics of full solid state structure, full electric operation, small in size, convenient operation, high reliability, use cost are low, can be for a long time low-cost steady operation.
Description
Technical field
The utility model is related to optical element testing fields, more particularly, are related to a kind of utilization closed chamber formula optical parameter
Oscillator technique realizes that optical element high power density, the irradiation of long-time laser test the device with examination in middle infrared band,
The device can be widely applied to the test and examination of middle infrared band high reflection optical element.
Background technology
The damage-resistant of optical element can be directly related to the reliability and service life of laser system.Science is accurately surveyed
Examination, examination, the antibody Monoclonal ability for judging optical element and service life are to ensure the basis of stabilized laser system reliability service.With
The continuous promotion for Continuous high-energy laser system output power proposes increasingly the resisting laser damage ability of optical element
High requirement.Currently, the optical element preparation process of visible light, near infrared band comparative maturity, for its damage from laser
The test method of characteristic and working life, test equipment are fairly perfect.In recent years, the infrared continuous-wave laser system in
Development, for antibody Monoclonal ability, working life of the mid-infrared light element under CW Laser test, examination demand
It is increasingly strong.But also lack easy, effective, low-cost test mid-infrared light element resisting laser damage ability at present
With the device of service life.
The output power of infrared continuous-wave laser system has had reached a megawatt magnitude in currently,.Test mid-infrared light
The resisting laser damage ability and service life of element need optical element being placed in high power density (103~104W/cm2), it is long when
Between (104~105S) under infrared CW Laser.Closed chamber is mainly based upon for the test of mid-infrared light element at present
Formula is fluorinated deuterated to learn what laser was realized.Although infrared continuous laser high power is defeated during fluorinated deuterated laser can be realized
Go out, but its operating cost is very high, is only capable of carrying out optical element test in tens of seconds, can not carry out long-time (104S magnitudes)
Test；In addition, fluorinated deuterated laser structure is complicated, bulky, for the test of optical element, there are inconveniences.
Utility model content
In view of the defects existing in the prior art, the utility model is provided based on infrared high anti-in optical parametric oscillator
Penetrate optical element test device.The utility model be intended to using infrared continuous laser fan-out capability in optical parametric oscillator,
The feature that long-time stable exports and operating cost is low will be to be tested in conjunction with the big feature of laser power density in resonant cavity
In infrared high reflection optical element be placed in resonant cavity and tested, designed by appropriate cavity body structure, will wait for photometry
Element be placed in high power density, it is prolonged under infrared CW Laser environment, realize centering infrared optical element damage-retardation
Hinder the test of ability and service life.
In order to achieve the above technical purposes, the technical solution of the utility model is：
Based on infrared high reflection optical element test device in optical parametric oscillator, including near-infrared fibre-optical laser
Device, pump coupling optical system, high reflective cavity mirror, additive mixing crystal, dichronic mirror, it is to be measured in infrared high reflection optics member
Part, output coupling mirror, middle infrared beamsplitter, power meter, middle infrared camera and monitoring system；Wherein high reflective cavity mirror, dichronic mirror,
Infrared high reflection optical element and output coupling mirror constitute the resonant cavity of closed chamber formula optical parametric oscillator in be measured；
Pumping source of the near infrared light fibre laser as closed chamber formula optical parametric oscillator, near-infrared fibre-optical laser
The near-infrared pumping laser of device output is incident on pump coupling optical system, after pump coupling optical system collimation and shaping,
In high reflective cavity mirror normal incidence to additive mixing crystal, optical parameter process, production occur in additive mixing crystal
The signal light of raw a branch of near-infrared and it is a branch of in infrared ideler frequency light, the signal light and remnant pump light in resonant cavity are along light path
It is exported through dichronic mirror；Ideler frequency light in resonant cavity after dichroic mirror, with incidence angle θ be irradiated to it is to be measured in it is infrared high anti-
It penetrates on optical element, in be measured after infrared high reflection optical element reflection, in normal incidence to output coupling mirror；It is coupling
On outgoing mirror, a part of ideler frequency light is coupled out mirror reflection, returns along original optical path, is vibrated in resonant cavity；Another part
Ideler frequency light through after output coupling mirror, be incident on middle infrared beamsplitter and ideler frequency light be divided into two bundles by middle infrared beamsplitter,
In a branch of ideler frequency light reflected into power meter, carry out power measurement；During another beam ideler frequency light penetrates infrared beamsplitter normal incidence into
Middle infrared camera carries out the measurement of beam cross section product.
Specifically, it is 99 that the ideler frequency light being incident on middle infrared beamsplitter is divided into power ratio by middle infrared beamsplitter:The two of 1
Beam ideler frequency light, wherein the ideler frequency light of a branch of accounting 99% is reflected into power meter, the ideler frequency light of another beam accounting 1% is red in penetrating
Outer spectroscope normal incidence is into middle infrared camera.
Wherein：High reflective cavity mirror is high to near-infrared pumping laser thoroughly, transmissivity>99%, high reflective cavity mirror is to near-infrared
Signal light ideler frequency light infrared in is high anti-, reflectivity>99.5%.The additive mixing crystal is quasi-phase-matching crystals,
Additive mixing crystal is placed in the collimator distance of near-infrared pumping laser.Dichronic mirror is to near-infrared pumping laser and near-infrared
Signal light is high thoroughly, transmissivity>98%；The infrared ideler frequency light of dichronic mirror centering is high anti-, reflectivity>99.5%.It is infrared high anti-in to be measured
The reflectivity for penetrating the infrared ideler frequency light of optical element centering is more than 98.5%.The transmissivity of output coupling mirror be τ, 1%<τ<5%；Coupling
The absorptivity for closing the infrared ideler frequency light of outgoing mirror centering is less than 100ppm.
Infrared high reflection optical element during the monitoring system alignment is to be measured, observe in real time, record it is to be measured in it is red
The state of outer high reflection optical element.
The utility model based on the optical parametric oscillator for closing cavity structure can be realized in resonant cavity high power density,
For a long time, the radiation parameter of infrared continuous laser in, the resisting laser damage ability of infrared high reflection optical element in capable of testing.
The spy that the utility model has structure of whole solid state, full electricity operation, compact, easy to operate, high reliability, use cost low
Point, can for a long time low cost stable operation, in the test of infrared high energy laser system have important application value.
In the utility model：Near-infrared of the near-infrared fibre-optical laser output wavelength between 1060~1090nm
Pumping laser.The output power of the near infrared light fibre laser is more than 100W, and power stability RMS value is better than 2%, spectrum
10dB line widths are less than 5nm, and spectral drift amount is less than 1nm, and polarization extinction ratio is more than 10dB, beam quality M2The factor is less than 2.
In the utility model：The pump coupling optical system is used to pump the near-infrared that near infrared light fibre laser exports
Pu laser carries out collimation and shaping, and clear aperture need to be more than the bore of near-infrared pumping laser, and aberration need to be less than λ/10.Pump
Pu coupling optical system is made of optical mirror slip, and function is to near-infrared pumping laser shaping, and guiding near-infrared pumping laser enters
It is mapped on additive mixing crystal.If the beam quality of near-infrared pumping laser is especially good, pump coupling can not also be needed
Optical system.
In the utility model：The additive mixing crystal is quasi-phase-matching crystals.
In the utility model：The power is calculated as the power meter of middle infrared band, and range must be more than 20W.
In the utility model：The bore of infrared ideler frequency light, resolution ratio during the visual field of the middle infrared camera is more than>640
× 480, dynamic range>8bit.
In the utility model：The letter that pumping laser, the additive mixing crystal being incident on additive mixing crystal generate
Number light and the wavelength of ideler frequency light meet conservation of energy condition (1) formula and wave vector matching condition (2) formula：
In above-mentioned two formula：λp、λs、λiThe wavelength of pumping laser, signal light, ideler frequency light is indicated respectively；np、ns、niGeneration respectively
Refractive index of the table additive mixing crystal at pump wavelength, signal light wavelength, ideler frequency optical wavelength；Λ is that additive mixing is brilliant
The polarization cycle of body.
Using above-mentioned offer based on infrared high reflection optical element test device, this practicality in optical parametric oscillator
It is novel also to provide a kind of based on infrared high reflection optical element test method in optical parametric oscillator, include the following steps：
(1) it builds based on infrared high reflection optical element test device in optical parametric oscillator；
(2) be calculated by (3) formula be radiated at it is to be measured in ideler frequency optical power density on infrared high reflection optical element
Iin；The output power of regulating near-infrared optical fiber laser, the power of infrared ideler frequency light changes correspondingly during resonant cavity is interior, works as IinIt reaches
To (I when setting numerical valueinValue range be 0.1~10kW/cm2), you can start to test；In entire test process, test dress
Setting need to be operated in isoperibol, and temperature fluctuation need to be less than 1 DEG C, and the spectral drift amount of infrared ideler frequency light is less than 20nm in guarantee.
In above formula, IinFor be radiated at it is to be measured in ideler frequency light on infrared high reflection optical element power density；PinFor
Be radiated at it is to be measured in ideler frequency light on infrared high reflection optical element power；Pin +And Pin -Respectively along positive direction and negative
Direction be irradiated to it is to be measured in ideler frequency light on infrared high reflection optical element power, defined in ideler frequency light output direction
For positive direction, direction in contrast is negative direction；θ is incidence of the ideler frequency light in be measured on infrared high reflection optical element
Angle can be obtained by the Structure Calculation of resonant cavity；A is the beam cross section product that middle infrared camera measures, PoutIt is exported from resonant cavity
The power of ideler frequency light is intermediate variable；PmFor the power for the ideler frequency light that power meter measures；τ is the transmissivity of output coupling mirror.
(3) in test process, monitored in real time using monitoring system, record it is to be measured in infrared high reflection optical element shape
State records the power P of the ideler frequency light of closed chamber formula optical parametric oscillator output using power meter in real timem, examine, judge it is to be measured
In infrared high reflection optical element high power density ideler frequency light irradiation under antibody Monoclonal ability；If infrared height in be measured
Reflective optical devices produce damage under high power density, the irradiation of prolonged ideler frequency light, and the ideler frequency light of power meter record is defeated
Go out power PmViolent decline will be will produce, at the same monitor system will detect that it is to be measured in outside infrared high reflection optical element
It sees pattern and significant change occurs.
Compared with prior art, the utility model has the following advantages：
1, the utility model is based on infrared continuous laser during optical parametric oscillator generates, and has structure of whole solid state, full electricity
The low feature of operation, compact, easy to operate, high reliability, use cost, can the inexpensive stable operation of long-time.
2, the utility model is based on infrared continuous laser during optical parametric oscillator generates, defeated by adjusting optical fiber laser
The power of the pumping laser gone out can very easily adjust the laser power density being radiated on mid-infrared light element；Pass through
Adjust the wavelength of the pumping laser of optical fiber laser output, thus it is possible to vary the test wavelength being radiated on mid-infrared light element.
The utility model is suitable for the test of a variety of mid-infrared light elements.
3, the utility model is using closing cavity structure, using infrared high reflection optical element in be tested as resonant cavity
One of hysteroscope, can under lower-wattage output condition (<100W), very high work(is realized in the resonant cavity of optical parametric oscillator
Rate density (10kW/cm2), for mid-infrared light element test provide high power density, it is prolonged in infrared continuous swash
Light radiation parameter.
Description of the drawings
Fig. 1 is the principles of the present invention schematic diagram；
Label declaration：
1- near infrared light fibre lasers；2- pump coupling optical systems；3- high reflective cavity mirrors；4- additive mixing crystal；
5- dichronic mirrors；Infrared high reflection optical element during 6- is to be measured；7- output coupling mirrors；Infrared beamsplitter in 8-；9- power meters；
Infrared camera in 10-；11- monitors system；
Fig. 2 is the correspondence figure of specific embodiment signal light wavelength and ideler frequency optical wavelength that utility model provides；
Fig. 3 is the spectrogram for the specific embodiment optical parametric oscillator output that utility model provides；
Fig. 4 is the long-time power graph that power meter 9 records in the specific embodiment that utility model provides；
Fig. 5 is that the specific embodiment that utility model provides monitors the mid-infrared light element of the record of system 11 in test process
In state diagram.
Specific implementation mode
It is new to this practicality below in conjunction with attached drawing to keep the purpose of this utility model, technical solution and advantage clearer
Type embodiment is described in further detail.
It is provided by the utility model based on infrared high reflection optical element test in optical parametric oscillator referring to Fig. 1
Device, including near infrared light fibre laser 1, pump coupling optical system 2, high reflective cavity mirror 3, additive mixing crystal 4, color separation
Mirror 5, it is to be measured in infrared high reflection optical element 6, output coupling mirror 7, middle infrared beamsplitter 8, power meter 9, middle infrared camera
10 and monitoring system 11；Wherein high reflective cavity mirror 3, dichronic mirror 5, it is to be measured in infrared high reflection optical element 6 and coupling output
Mirror 7 constitutes the resonant cavity of closed chamber formula optical parametric oscillator；
Pumping source of the near infrared light fibre laser 1 as closed chamber formula optical parametric oscillator, output wavelength exist
Near-infrared pumping laser between 1060~1090nm.In the present embodiment：The near infrared light fibre laser 1 of use exports continuously
Near-infrared pumping laser, wavelength 1080nm, output power 120W, power stability RMS value be 1%, spectrum 10dB line widths
For 4nm, polarization extinction ratio 20dB, beam quality M2The factor is 1.5, and output beam bore is 0.5cm.
Near-infrared pumping laser is incident on pump coupling optical system 2, and pump coupling optical system clear aperture is
1.5cm.Near-infrared pumping laser passes through 3 normal incidence of high reflective cavity mirror to non-after the collimation of pump coupling optical system 2 and shaping
On linear frequency-changer crystal 4, optical parameter process occurs in additive mixing crystal 4, generate a branch of near-infrared signal light and
Infrared ideler frequency light in a branch of.Signal light and remnant pump light in resonant cavity are exported along light path through dichronic mirror 5.Resonant cavity
Interior ideler frequency light after the reflection of dichronic mirror 5, with incidence angle θ be irradiated to it is to be measured on infrared high reflection optical element 6, in be measured
Infrared high reflection optical element 6 is 99.5% to the reflectivity of ideler frequency light infrared in 3811nm.
Wherein：High reflective cavity mirror 3 is concave mirror, and focal length 1m, the transmissivity to the near-infrared pumping laser of 1080nm is
99.5%, the reflectivity of the ideler frequency light of signal light and 3811nm to 1507nm is 99.7%.Additive mixing crystal 4 uses
Quasi-phase-matching crystals MgO:PPLN, polarization cycle are 29.8 μm, and additive mixing crystal 4 is placed in near-infrared pumping laser
In collimator distance.Dichronic mirror 5 is high to the signal light of near-infrared pumping laser and near-infrared thoroughly, transmissivity 98.8%；Dichronic mirror 5
The infrared ideler frequency light of centering is high anti-, reflectivity 99.7%.
After infrared high reflection optical element 6 reflects in be measured, normal incidence to transmissivity for τ output coupling mirror 7
On, τ is 1.8% in the present embodiment；The absorptivity of the infrared ideler frequency light of 7 centering of output coupling mirror is 55ppm.
On output coupling mirror 7, most ideler frequency light is coupled out the reflection of mirror 7, is returned along original optical path, in resonant cavity
Middle oscillation；After the ideler frequency light of rest part penetrates output coupling mirror 7, it is 99 to be divided for power ratio by middle infrared beamsplitter 8:The two of 1
Beam ideler frequency light carries out power measurement wherein the ideler frequency light of a branch of accounting 99% is reflected into power meter 9；Another beam accounting 1%
8 normal incidence of infrared beamsplitter carries out the measurement of beam cross section product into middle infrared camera 10 during ideler frequency light penetrates.Wherein：In it is infrared
The splitting ratio of spectroscope 8 is 99:1.The range of power meter is 100W.The visual field of middle infrared camera 10 is Φ 2cm, and resolution ratio is
800 × 600, dynamic range 16bit.
The monitoring system 11 be aligned it is to be measured in infrared high reflection optical element, observe in real time, record it is to be measured in
The state of infrared high reflection optical element.
Build test device according to the topology layout that Fig. 1 is provided, high reflective cavity mirror 3, dichronic mirror 5, it is to be measured in infrared height
Reflective optical devices 6, output coupling mirror 7 constitute the resonant cavity of optical parametric oscillator, chamber length and the high reflective cavity mirror 3 of resonant cavity
Focal length it is equal, be 1m.
The near-infrared pumping laser that near infrared light fibre laser 1 exports passes through after 2 shaping of pump coupling optical system
High reflective cavity mirror 3 is incident on additive mixing crystal 4 (additive mixing crystal 4 is placed in the collimator distance of pumping laser),
Meet quasi-phase matched condition (meeting (2) formula) in additive mixing crystal 4, optical parameter process occurs, generates a branch of
The signal light of near-infrared and it is a branch of in infrared ideler frequency light, according to conservation of energy condition (1) formula and wave vector matching condition (2) formula,
Obtain signal light, the wavelength of ideler frequency light is respectively λs=1507nm, λi=3811nm, as shown in Figure 2.Signal light in resonant cavity
It is exported through dichronic mirror 5 along light path with remnant pump light.Ideler frequency light is shone after the reflection of dichronic mirror 5 with 22.5 degree of incidence angle
Be mapped to it is to be measured on infrared high reflection optical element 6, after infrared high reflection optical element 6 reflects in be measured, just enter
It is mapped on output coupling mirror 7.Most ideler frequency light is coupled out the reflection of mirror 7, returns along original optical path, shakes in resonant cavity
It swings；After remaining ideler frequency light penetrates output coupling mirror 7, (power ratio 99 is divided into two bundles by middle infrared beamsplitter 8:1), accounting
99% ideler frequency light is reflected into power meter 9, record power Pm=16.6W, infrared beamsplitter during the ideler frequency light of accounting 1% penetrates
For 8 normal incidences into middle infrared camera 10, it is 0.20cm to measure beam cross section product2.Test device works at room temperature, and temperature fluctuation is small
In 0.5 DEG C, in the spectral drift of infrared ideler frequency light be less than 10nm, the output spectrum of test device is as shown in Figure 3.
Be calculated according to (3) formula be radiated at it is to be measured in ideler frequency optical power density on infrared high reflection optical element 6
Iin=8.53kW/cm2.It is red in test, examination using the state of infrared high reflection optical element 6 in the monitoring in real time of monitoring system
Antibody Monoclonal ability of the outer high reflection optical element 6 in high power density continuous wave under infrared ideler frequency light irradiation.
The infrared high reflection optical element of centering has carried out the test of 15000s (250min) in this example.In test process
In, power P that power meter measuresmChange curve it is as shown in Figure 4.The power of infrared ideler frequency light is protected in figure 4, it is seen that
It is fixed to keep steady, and does not decline at any time.The state for the optical element that monitoring system 11 records is as shown in Figure 5.According to monitoring system 11
Record as a result, in high power density, prolonged 3811nm under the irradiation of infrared ideler frequency light, the state of tested optical element
Do not occur significantly to change.This show it is tested in infrared high reflection optical element 6 have good antibody Monoclonal ability,
In the time of 15000s, infrared high reflection optical element 6 is not by the laser damage of high power density in tested, and it is anti-
Rate is penetrated not decline.
The quasi-phase-matching crystals used in this example can be replaced by the device with similar function, can be quasi- phase
Matched crystal can also be birefringent phase matching crystal, including but not limited to PPLN, KTP, KDP, BBO, KTA, PPMgLN,
The nonlinear crystals such as PPLT, ZGP, PPKTP.
Optical parametric oscillator is a kind of broad tuning coherent source, and the important way that infrared continuous laser exports in realization
Diameter.For fluorinated deuterated laser, optical parametric oscillator has simple in structure, compact, high reliability, fortune
Row is at low cost, being capable of the advantages such as long-term stable work.Currently, optical parametric oscillator has been realized in hundred in middle infrared band
The continuous laser output of watt magnitude.Using cavity structure is closed, high power density (10 can be realized on optical element3~104W/
cm2) radiation parameter.It therefore, being capable of centering infrared optical element progress height using closed chamber formula Continuous-Wave Optical Parametric Oscillator
Power density, prolonged test.
The utility model proposes based on closed chamber formula Continuous-Wave Optical Parametric Oscillator mid-infrared light element test dress
Set be capable of providing high power density, it is prolonged in infrared CW Laser condition, realize that centering infrared optical element is anti-and swash
The long-time of light injury ability is tested.By adjust closed chamber formula optical parametric oscillator pump power and output coupling mirror it is saturating
It penetrates than can very easily adjust irradiance power density.The utility model have it is compact-sized, simple and reliable, easy to operate, make
With feature at low cost.
The above is only the preferred embodiment of the utility model, and the scope of protection of the utility model is not limited to
Embodiment is stated, technical solution belonging to the idea of the present invention belongs to the scope of protection of the utility model.It should be pointed out that
For those skilled in the art, several improvement without departing from the principle of the utility model and profit
Decorations, these improvements and modifications also should be regarded as the scope of protection of the utility model.
Claims (10)
1. based on infrared high reflection optical element test device in optical parametric oscillator, which is characterized in that including near-infrared
Optical fiber laser, pump coupling optical system, high reflective cavity mirror, additive mixing crystal, dichronic mirror, it is to be measured in it is infrared high anti-
Penetrate optical element, output coupling mirror, middle infrared beamsplitter, power meter, middle infrared camera and monitoring system；Wherein high reflection chamber
Mirror, dichronic mirror, it is to be measured in infrared high reflection optical element and output coupling mirror constitute the humorous of closed chamber formula optical parametric oscillator
Shake chamber；
Pumping source of the near infrared light fibre laser as closed chamber formula optical parametric oscillator, near infrared light fibre laser are defeated
The near-infrared pumping laser gone out is incident on pump coupling optical system, after pump coupling optical system collimation and shaping, passes through
In high reflective cavity mirror normal incidence to additive mixing crystal, optical parameter process occurs in additive mixing crystal, generates one
The signal light of beam near-infrared and it is a branch of in infrared ideler frequency light, signal light and remnant pump light in resonant cavity are penetrated along light path
Dichronic mirror exports；Ideler frequency light in resonant cavity after dichroic mirror, with incidence angle θ be irradiated to it is to be measured in infrared high reflection light
It learns on element, in be measured after infrared high reflection optical element reflection, in normal incidence to output coupling mirror；It is exported in coupling
On mirror, a part of ideler frequency light is coupled out mirror reflection, returns along original optical path, is vibrated in resonant cavity；The spare time of another part
After frequency light penetrates output coupling mirror, it is incident on middle infrared beamsplitter and ideler frequency light is divided into two bundles by middle infrared beamsplitter, wherein one
Beam ideler frequency light is reflected into power meter, carries out power measurement；Infrared beamsplitter normal incidence is red in during another beam ideler frequency light penetrates
Outer camera carries out the measurement of beam cross section product；
Infrared high reflection optical element during the monitoring system alignment is to be measured, observe in real time, record it is to be measured in infrared height
The state of reflective optical devices.
2. it is according to claim 1 based on infrared high reflection optical element test device in optical parametric oscillator,
It is characterized in that, it is 99 that the ideler frequency light being incident on middle infrared beamsplitter is divided into power ratio by middle infrared beamsplitter:1 two beam ideler frequencies
Light, wherein the ideler frequency light of a branch of accounting 99% is reflected into power meter, infrared spectroscopy during the ideler frequency light of another beam accounting 1% penetrates
Mirror normal incidence is into middle infrared camera.
3. it is according to claim 2 based on infrared high reflection optical element test device in optical parametric oscillator,
It is characterized in that, near-infrared fibre-optical laser output wavelength near-infrared pumping laser between 1060~1090nm；It is described
The output power of near infrared light fibre laser is more than 100W, and power stability RMS value is better than 2%, and spectrum 10dB line widths are less than
5nm, spectral drift amount are less than 1nm, and polarization extinction ratio is more than 10dB, beam quality M2The factor is less than 2.
4. according to claim 1,2 or 3 based on infrared high reflection optical element test dress in optical parametric oscillator
It sets, which is characterized in that high reflective cavity mirror is high to near-infrared pumping laser thoroughly, transmissivity>99%, high reflective cavity mirror is to near-infrared
Signal light ideler frequency light infrared in is high anti-, reflectivity>99.5%.
5. it is according to claim 4 based on infrared high reflection optical element test device in optical parametric oscillator,
It is characterized in that, the additive mixing crystal is quasi-phase-matching crystals, and additive mixing crystal is placed in near-infrared pumping laser
Collimator distance in.
6. it is according to claim 5 based on infrared high reflection optical element test device in optical parametric oscillator,
It is characterized in that, dichronic mirror is high to near-infrared pumping laser and near infrared signal light thoroughly, transmissivity>98%；Dichronic mirror centering is infrared
Ideler frequency light is high anti-, reflectivity>99.5%.
7. it is according to claim 6 based on infrared high reflection optical element test device in optical parametric oscillator,
It is characterized in that, the reflectivity of the infrared infrared ideler frequency light of high reflection optical element centering is more than 98.5% in be measured.
8. it is according to claim 7 based on infrared high reflection optical element test device in optical parametric oscillator,
It being characterized in that, the transmissivity of output coupling mirror is τ, 1%<τ<5%, and the absorptivity of the infrared ideler frequency light of output coupling mirror centering is small
In 100ppm.
9. it is according to claim 8 based on infrared high reflection optical element test device in optical parametric oscillator,
It is characterized in that, the bore of infrared ideler frequency light, resolution ratio during the visual field of the middle infrared camera is more than>640 × 480, dynamic model
It encloses>8bit.
10. it is according to claim 1 based on infrared high reflection optical element test device in optical parametric oscillator,
It is characterized in that：The signal light and ideler frequency that pumping laser, the additive mixing crystal being incident on additive mixing crystal generate
The wavelength of light meets conservation of energy condition (1) formula and wave vector matching condition (2) formula：
In above-mentioned two formula：λp、λs、λiThe wavelength of pumping laser, signal light, ideler frequency light is indicated respectively；np、ns、niIt respectively represents non-
Linear refractive index of the frequency-changer crystal at pump wavelength, signal light wavelength, ideler frequency optical wavelength；Λ is additive mixing crystal
Polarization cycle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820353314.3U CN207946214U (en) | 2018-03-15 | 2018-03-15 | Intermediate infrared high-reflection optical element testing device based on optical parametric oscillator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820353314.3U CN207946214U (en) | 2018-03-15 | 2018-03-15 | Intermediate infrared high-reflection optical element testing device based on optical parametric oscillator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207946214U true CN207946214U (en) | 2018-10-09 |
Family
ID=63696962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820353314.3U Active CN207946214U (en) | 2018-03-15 | 2018-03-15 | Intermediate infrared high-reflection optical element testing device based on optical parametric oscillator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207946214U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108267301A (en) * | 2018-03-15 | 2018-07-10 | 中国人民解放军国防科技大学 | Intermediate infrared high-reflection optical element testing device and method based on optical parametric oscillator |
-
2018
- 2018-03-15 CN CN201820353314.3U patent/CN207946214U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108267301A (en) * | 2018-03-15 | 2018-07-10 | 中国人民解放军国防科技大学 | Intermediate infrared high-reflection optical element testing device and method based on optical parametric oscillator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Fan et al. | Second harmonic generation and accurate index of refraction measurements in flux-grown KTiOPO 4 | |
| Zondy et al. | Absolute value of the d 36 nonlinear coefficient of AgGaS 2: prospect for a low-threshold doubly resonant oscillator-based 3: 1 frequency divider | |
| Capocasa et al. | Estimation of losses in a 300 m filter cavity and quantum noise reduction in the KAGRA gravitational-wave detector | |
| Marzenell et al. | Synchronously pumped femtosecond optical parametric oscillator based on AgGaSe2 tunable from 2 μm to 8 μm | |
| CN109632128B (en) | Device and method for measuring double-resonance temperature condition of optical cavity | |
| Sanjuan et al. | Full electro-optic terahertz time-domain spectrometer for polarimetric studies | |
| CN109066280A (en) | A kind of power proportions and pulse spacing adjustable dual wavelength light parametric oscillator | |
| Koch et al. | Hot spots in parametric fluorescence with a pump beam of finite cross section | |
| CN207946214U (en) | Intermediate infrared high-reflection optical element testing device based on optical parametric oscillator | |
| Millon et al. | 400 kHz repetition rate THz-TDS with 24 mW of average power driven by a compact industrial Yb-laser | |
| CN106768873A (en) | A kind of method and device for measuring high-fineness fineness of cavity | |
| Yu et al. | Probing dielectric relaxation properties of liquid CS 2 with terahertz time-domain spectroscopy | |
| US11404840B2 (en) | Device and method for measuring thermal load caused by excited state absorption in laser gain crystal | |
| CN104237164B (en) | Measurement apparatus and method of the nonlinear optical crystal in terahertz wave band refractive index | |
| US20210164850A1 (en) | Device and method for measuring thermal load caused by energy transfer upconversion in laser gain crystal | |
| CN108267301A (en) | Intermediate infrared high-reflection optical element testing device and method based on optical parametric oscillator | |
| Pepper | Observation of diminished specular reflectivity from phase-conjugate mirrors | |
| Andreev et al. | Frequency up-conversion in a mercury thiogallate crystal | |
| Lykke et al. | Development of a monochromatic, uniform source facility for calibration of radiance and irradiance detectors from 0.2 µm to 12 µm | |
| Takeuchi et al. | Broadband near‐infrared pulse generation in KTiOPO4 | |
| Chen et al. | Midinfrared cw difference‐frequency generation using a synchronous scanning technique for continuous tuning of the full spectral region from 4.7 to 6.5 μm | |
| Wang et al. | Frequency-tunable sum-and difference-frequency generation by using two diode lasers in a KTP crystal | |
| Vyunishev et al. | Čerenkov nonlinear diffraction of femtosecond pulses | |
| Chen et al. | Difference–frequency infrared generation and application to the water vapor trace monitoring | |
| Touahri et al. | 30-THz upconversion of an AlGaAs diode laser with AgGaS2: bridging the several-terahertz frequency gap in the near infrared |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |