CN104466651A - Annular integrated laser frequency doubling device - Google Patents
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- CN104466651A CN104466651A CN201410722430.4A CN201410722430A CN104466651A CN 104466651 A CN104466651 A CN 104466651A CN 201410722430 A CN201410722430 A CN 201410722430A CN 104466651 A CN104466651 A CN 104466651A
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Abstract
The invention provides an annular integrated laser frequency doubling device which comprises a periodic poling KTP (PPKTP) frequency doubling crystal and an annular frequency doubling cavity. The annular frequency doubling cavity comprises a plane reflecting mirror M1, a plane reflecting mirror M2, a concave surface reflecting mirror M3 and a concave surface reflecting mirror M4. The two end faces of the PPKTP frequency doubling crystal are each plated with an antireflection film special to fundamental frequency lasers and second harmonics. According to the annular integrated laser frequency doubling device, a frequency stabilized laser of 1064 nm and the PPKTP frequency doubling crystal are used for being combined with a quasi-phase matching and annular outer cavity frequency doubling technology, a stable laser of 1064 nm and a stable laser of 532 nm which have a strict diploid relation in wavelength can be output, the advantages of being good in wave length and power stability, small in line width and the like are achieved, and the wave length linearity of an optical grating spectrograph can be calibrated; a frequency stabilized laser wave length standard device of 1064 nm can be miniaturized, the performance is stable, the structure is compact and the anti-jamming capability is high.
Description
Technical field
The present invention relates to laser freuqency doubling technical field, be specifically related to a kind of integrated ring shaped laser frequency doubler.
Background technology
Conventional laser output wavelength is generally the laser of near-infrared single-frequency, along with the development of science and technology, the demand of all trades and professions to laser increases greatly, proposes requirements at the higher level to laser output wavelength, needs laser output wavelength to infrared and ultraviolet band expansion.The laser output wavelength that common lasers do not reach can be obtained by nonlinear frequency transformation technology, as ultraviolet, in infrared and Submillineter Wave Technology etc., wherein blue laser is widely used in fields such as the storage of high-density optical data, laser medicine, spectroscopy, absorption imaging and laser coolings, and infrared coherent laser is widely used in fields such as spectral investigation, laser guidance, laser orientation Infrared jamming, atmospheric monitorings.
Nonlinear frequency conversion technology is a kind of effective technology of expansion of laser light device range of application, it utilizes optical medium to produce new frequency in the strong good fortune nonlinear optical effect of penetrating after the match, the frequency of existing lasing light emitter is expanded, has a wide range of applications in research and production.The frequency multiplication of light wave produces, and make again second_harmonic generation (Second Harmonic Generation, SHG) be a kind of typical nonlinear optical process, it is derived from medium to the second nonlinear response of light field or polarization.In recent years, the direction of frequency doubling technology development is the laser producing more short wavelength, obtains more stable output with higher shg efficiency.
Conventional laser freuqency doubling technology comprises birefringent phase matching frequency doubling technology and quasi-phase matched frequency doubling technology.Traditional birefringent phase matching frequency doubling technology is the birefringence effect and the dispersion characteristics that utilize single shaft or biaxial crystal, phase matched is realized by the wave vector direction and polarization direction of selecting light wave, thus obtain high frequency-doubling conversion efficiency, but this technology is subject to the restriction of material itself, not all crystal can realize birefringent phase matching, some crystal with special construction is only had to realize birefringent phase matching, and birefringece crystal also needs to cut along particular orientation, or specific working temperature, in addition this technology can't apply the maximum non linear coefficient of crystal, the use of this technology is caused to be extremely restricted.
Quasi-phase matched frequency doubling technology utilizes periodical poled crystal to realize phase matched, by the periodic modulation of crystal non-linear susceptibility, carry out the phase mismatch between pump light that in compensating light parametric process, dispersion of refractive index causes and parameteric light, thus obtain the enhancing of nonlinear optical effect.Quasi-phase matched frequency doubling technology expands the scope of application of existing nonlinear optical material, and can utilize the maximum non linear coefficient of crystal, and there is not walk-off effect.Quasi-phase matched frequency doubling technology has unique superiority, is widely used in nonlinear optical frequency conversion, the shaping of light pulse, all-optical switch, all optical wavelength conversion, electrooptic modulation, acoustooptic modulation etc.
Summary of the invention
The object of this invention is to provide a kind of integrated ring shaped laser frequency doubler, to realize the frequency multiplication to 1064nm fundamental frequency light, obtain the 532nm frequency multiplication resonant laser light of efficient stable, high-power output, and realize the miniaturization of laser frequency doubler simultaneously.
For reaching above-mentioned purpose, the invention provides a kind of integrated ring shaped laser frequency doubler, comprising:
PPKTP (periodic polarized KTP) frequency-doubling crystal and annular frequency doubling cavity;
Wherein, described annular chamber comprises plane mirror M1, M2 and concave mirror M3, M4; Described PPKTP crystal both ends of the surface are all coated with the anti-reflection film to fundamental frequency light and second harmonic.
Wherein, described plane mirror M1 is coupling mirror, for receiving fundamental frequency light, with realize fundamental frequency light from chamber to the coupling in chamber; Transmitance according to described plane mirror M1 can realize " impedance matching ".
Wherein, described plane mirror M2, concave mirror M3 and concave mirror M4 have high reflectance to described fundamental frequency light;
Wherein said concave mirror M4 has high permeability to frequency doubled light.
Further, this device also comprises detector 1 and detector 2, and described detector 1 is positioned on the extended line of described M4, M1; Described detector 2 is positioned on the line extended line of described M1, M2; This detector 1 and detector 2 are for monitoring the imbalance situation between described annular frequency doubling cavity optical maser wavelength and resonator cavity resonance wavelength.
Further, this device also comprises servo control circuit system, and its input is connected with described detector 2, and its output is connected with the driver of the piezoelectric ceramic of described annular frequency doubling cavity;
The error signal produced when lacking of proper care between the described annular frequency doubling cavity optical maser wavelength of supervision that this servo control circuit system monitors for the treatment of this detector 1 and detector 2 and resonator cavity resonance wavelength; And result is fed back to the driver of the piezoelectric ceramic of described annular frequency doubling cavity.
Further, the driver of the piezoelectric ceramic of described annular frequency doubling cavity, for controlling the flexible of the piezoelectric ceramic of described annular frequency doubling cavity, to regulate the chamber of described annular frequency doubling cavity long, and then the tracking realized between described annular frequency doubling cavity and 1064nm frequency stabilized carbon dioxide laser and locking.
Preferably, this device also comprises 1064nm frequency stabilized carbon dioxide laser, λ/4 wave plate, λ/2 wave plate, pattern matching lens Len and speculum;
Wherein, this fundamental frequency light for generation of described fundamental frequency light, and is emitted to described λ/4 wave plate by described 1064nm frequency stabilized carbon dioxide laser;
Described λ/4 wave plate and λ/2 wave plate are used for successively receiving and processing described fundamental frequency light, and make this fundamental frequency light convert linearly polarized light to by elliptically polarized light, implementation space polarization state is mated;
It for receiving the fundamental frequency light of this process, and is coupled in the cavity of described annular frequency doubling cavity by described speculum by described pattern matching lens Len.
Further, the size of the light path part of this device can be set to 20 × 12 × 9cm
3.
Technique scheme has following beneficial effect:
The present invention utilizes 1064nm frequency stabilized carbon dioxide laser and PPKTP frequency-doubling crystal, in conjunction with quasi-phase matched and annular outer-cavity frequency doubling technology, achieve 1064nm, 532nm stabilized lasers output that wavelength has exact multiple relation, there is the advantages such as wavelength, power stability are good, line width, can the wavelength linear degree of grating type spectrometer be calibrated; Achieve the miniaturization of 1064nm Frequency Stabilized Lasers standard of wavelength device, stable performance, compact conformation, antijamming capability are strong.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the annular frequency doubling cavity of the embodiment of the present invention;
Fig. 2 is the structural representation of the integrated ring shaped laser frequency doubler of the embodiment of the present invention;
Fig. 3 is 532nm power stability experiment curv figure.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The present invention utilizes 1064nm frequency stabilized carbon dioxide laser, in conjunction with quasi-phase matched and annular outer-cavity frequency doubling technology, devises a kind of integrated ring shaped laser frequency doubler.
The general principle of laser freuqency doubling: light is propagated in media as well, can interact with medium, if the response of medium to light is non-linear relation, this time propagates in media as well and can produce new frequency, this process is called nonlinear frequency transformation, incident light is pump light, and the light of the new frequency of generation is called parameteric light.When utilizing medium to carry out frequency translation, because the refractive index of different medium material is different, same material is different to the refractive index of different wavelengths of light, makes light wave propagation velocity in media as well be the function of frequency (wavelength).Pump light is different from parameteric light frequency, and phase velocity is different, phase place is also different, and only could obtain efficient nonlinear frequency conversion when meeting certain phase relation, their this phase relation is the important physical amount affecting parameteric light gain and conversion efficiency.
Conventional laser freuqency doubling technology comprises birefringent phase matching frequency doubling technology and quasi-phase matched frequency doubling technology.Traditional birefringent phase matching frequency doubling technology is the birefringence effect and the dispersion characteristics that utilize single shaft or biaxial crystal, realizes phase matched, thus obtain high frequency-doubling conversion efficiency by the wave vector direction and polarization direction selecting light wave.Realizing birefringent phase matching has angular phase coupling and temperature phase to mate two kinds of methods.Angular phase coupling reaches the object of phase matched by changing incident light to the angle of crystal; Temperature phase coupling is the crystal utilizing refractive index versus temperature sensitivity, by the method changing crystal temperature effect, refractive index is changed, thus reaches the object of phase matched.The crystal being usually used in birefringent phase matching has KTP, BBO, LBO, CLBO etc.The effective nonlinear coefficient of ktp crystal is larger than other crystal, and be widely used under middle low power, lbo crystal has high damage threshold, can realize noncritical phase matching, is used for high power situation.But birefringent phase matching frequency doubling technology mainly contains following shortcoming: the 1. restriction of material itself.The kind of crystal is a lot, and not all crystal can realize birefringent phase matching, only has some crystal with special construction to realize birefringent phase matching.And birefringece crystal also needs along particular orientation cutting, or specific working temperature, use is extremely restricted.2. the interaction direction due to mixing light wave is inconsistent, limits interaction length, reduces conversion efficiency.3. the maximum non linear coefficient of crystal can not be applied.
Quasi-phase matched frequency doubling technology is by making the light wave wave vector phase place propagated in crystal change π after a coherence length, i.e. phasing back someway, makes the method for light wave wave vector phasing back be exactly the symbol of periodically-varied crystal non linear coefficient.Quasi-phase matched frequency doubling technology has widened the range of application of nonlinear crystal, greatly improves the frequency conversion efficiency of interaction light wave, has become the study hotspot in nonlinear optical material and solid state laser field.
Quasi-phase matched frequency doubling technology (Quasi-Phase Matching, QPM) be the another kind of phase matched frequency doubling technology obtaining efficient non-linear frequency translation, it utilizes periodical poled crystal to realize phase matched, by the periodic modulation of crystal non-linear susceptibility, carry out the phase mismatch between pump light that in compensating light parametric process, dispersion of refractive index causes and parameteric light, thus obtain the enhancing of nonlinear optical effect.
Quasi-phase matching, by crystal design is become periodic structure, meets phase-matching condition.Ferroelectric material is the most ideal material realizing quasi-phase matched at present.All ferroelectric crystals all can show spontaneous polarization properties below Curie temperature, and under the effect of extra electric field, effectively can realize ferroelectric domain reversion, change the spontaneous polarization direction of crystal.The spontaneous polarization vector direction of adjacent two panels ferroelectric domain is contrary, the physical property of the ferroelectric domain be thus associated with odd-order tensor, if nonlinear optical coefficients, electro-optic coefficient, piezoelectric modulus etc. are all opposite sign with value, therefore this crystal-like physical property is no longer constant but the periodic function of space coordinates.Up to the present, considerable crystal is had for making quasi-phase matched frequency multiplication element, as PPLN, PPKTP, PPLT and PPRTA crystal etc.Such as, utilize the non linear coefficient d31 of ferroelectric crystal LiNbO3 can realize birefringence angle phase matched, but its maximum non linear coefficient d33 but can not realize phase matched, but can be used by the d33 of quasi-phase matched to LiNbO3, LiNbO3 is made the ferroelectric domain structure of periodic inversion, i.e. periodically-varied nonlinear system numerical symbol, makes parameter light intensity continue to strengthen along optical direction in the region that should decay, thus obtains high efficiency nonlinear frequency conversion.
From energy viewpoint, in the nonlinear frequency conversion of parameter production process, the energy of pumping light wave is constantly coupled in parameter light wave by the nonlinear polarization of medium, the phase symbol of light wave of interacting in a coherence length is identical, frequency translation is constantly strengthened, but the phase symbol of the light wave that interacts in another coherence length is contrary, and energy returns pumping light wave by nonlinear polarization by parameter light wave.The parameter light wave that quasi-phase matching is then equivalent to each several part produces has done a modulation, parameter light wave can be made to be continued in the region that some should weaken to strengthen, therefore the symbol of periodically-varied non linear coefficient is only needed, realize the reversion of phase cycling, thus the phase place of the parameter light wave making crystal diverse location produce is consistent, the energy of pumping light wave is constantly coupled in parameter light wave, realizes high efficiency nonlinear frequency conversion.
Annular frequency doubling cavity is designed to incorporating chamber structure, enhances the stability of annular frequency doubling cavity.Because cavity relative closure, so to cavity temperature control, crystal temperature control with avoid in the chamber mirror mirror holder deformation that may cause etc. because ambient temperature change, having and well improve effect.
PPKTP frequency-doubling crystal (periodically-poled KTP, periodic polarized ktp crystal) laser frequency frequency multiplication for 1064nm to 532nm, its working temperature is close to room temperature, at room temperature can realize noncritical phase matching, effective nonlinear coefficient is larger, and deviation angle is zero, and damage threshold is higher, and its comprehensive optics, physics and chemistry characteristic, make it become the frequency-doubling crystal of a kind of people employing very interested.
Laser freuqency doubling is divided into cavity external frequency multiplication and intracavity frequency doubling, and intracavity frequency doubling can obtain higher energy conversion efficiency, but cavity external frequency multiplication is easy to realize.Cavity external frequency multiplication divides again once-through frequency-doubling crystal frequency multiplication and exocoel to strengthen frequency multiplication, wherein the energy conversion efficiency of once-through frequency multiplication is lower, and exocoel enhancing frequency multiplication can obtain higher energy conversion efficiency, but it needs carefully to adjust and a set of electronics lock chamber system exocoel, and there iing tuning requirement to frequency at any time, particularly to the tuning response aspect of fast frequency, easy to use not as once-through frequency multiplication approach.Strengthen frequency doubling cavity conventional in frequency multiplication at exocoel and have two mirror chambeies (standing-wave cavity) and annular chamber (travelling-wave cavity).Two mirror intonation lift faces are easy, and because only have two chamber mirrors, so loss is less, therefore two mirror chambeies can obtain higher conversion efficiency, but two mirror chambeies have the intrinsic bulk of optical feedback caused by mirror-reflection, optical isolator must be added to reduce its impact.Annular chamber can be divided into again single-block annular chamber and discrete component annular chamber.Single-block annular frequency doubling cavity processing difficulties, and be not easy to the continuous tuning of wide range of frequencies.By contrast, resolution element annular chamber, although efficiency is lower than two mirror chambeies and single-block annular chamber, it fundamentally avoids direct light feedback, avoids processing difficulties, can carry out tuning on a large scale, easily realizes again the locking of laser frequency simultaneously.Although integrated ring shaped frequency doubling cavity processing difficulties, have score from the more stable characteristic of element annular chamber, meanwhile, compared with straight chamber, fundamentally avoid direct light feedback, therefore the present invention adopts integrated ring shaped chamber as frequency doubling cavity.
In order to improve beam quality, improve the power output of 532nm wavelength, the present invention adopts the PPKTP of quasi-phase matched as frequency-doubling crystal, utilize 1064nm frequency stabilized carbon dioxide laser, in conjunction with quasi-phase matched and annular outer-cavity frequency doubling technology, devise integrated ring shaped frequency doubling cavity, have developed miniaturized 1064nm frequency doubling device, its light path part is of a size of 20 × 12 × 9cm
3obtain the green resonant laser light of 532nm that is Wavelength stabilized, power stability to export, its power output is 450mW, its power stability is better than 0.7% (4 hours), for 532nm optical maser wavelength frequency multiplication lays the foundation to the output of 266nm Ultra-Violet Laser, and then realize the calibration to spectrometer S-band wavelength index.
Below by instantiation, the present invention is specifically addressed.Embodiment one
Fig. 1 is the structural representation of the annular frequency doubling cavity of the embodiment of the present invention.As shown in Figure 1,
This integrated ring shaped laser frequency doubler, comprising:
PPKTP (periodic polarized KTP) frequency-doubling crystal and annular frequency doubling cavity;
Wherein, described annular chamber comprises plane mirror M1, M2 and concave mirror M3, M4; Described PPKTP crystal both ends of the surface are all coated with the anti-reflection film to fundamental frequency light and second harmonic.
Wherein, described plane mirror M1 is coupling mirror, for receiving fundamental frequency light, with realize fundamental frequency light from chamber to the coupling in chamber; Transmitance according to described plane mirror M1 can realize " impedance matching ".
Wherein, described plane mirror M2, concave mirror M3 and concave mirror M4 have high reflectance to described fundamental frequency light;
As shown in Figure 1, described concave mirror M4 has high permeability to frequency doubled light, in order to the light by described 532nm.
Fig. 2 is the structural representation of the integrated ring shaped laser frequency doubler of the present embodiment, as shown in Figure 2:
This device also comprises detector 1 and detector 2, and described detector 1 is positioned on the extended line of described M4, M1; Described detector 2 is positioned on the line extended line of described M1, M2; This detector 1 and detector 2 are for monitoring the imbalance situation between described annular frequency doubling cavity optical maser wavelength and resonator cavity resonance wavelength.
Further, this device also comprises servo control circuit system, and its input is connected with described detector 2, and its output is connected with the driver of the piezoelectric ceramic of described annular frequency doubling cavity;
The error signal produced when lacking of proper care between the described annular frequency doubling cavity optical maser wavelength of supervision that this servo control circuit system monitors for the treatment of this detector 1 and detector 2 and resonator cavity resonance wavelength; And result is fed back to the driver of the piezoelectric ceramic of described annular frequency doubling cavity.
Further, the driver of the piezoelectric ceramic of described annular frequency doubling cavity, for controlling the flexible of the piezoelectric ceramic of described annular frequency doubling cavity, to regulate the chamber of described annular frequency doubling cavity long, and then the tracking realized between described annular frequency doubling cavity and 1064nm frequency stabilized carbon dioxide laser and locking.
Preferably, this device also comprises 1064nm frequency stabilized carbon dioxide laser, λ/4 wave plate, λ/2 wave plate, pattern matching lens Len and speculum;
Wherein, this fundamental frequency light for generation of described fundamental frequency light, and is emitted to described λ/4 wave plate by described 1064nm frequency stabilized carbon dioxide laser;
Described λ/4 wave plate and λ/2 wave plate are used for successively receiving and processing described fundamental frequency light, and make this fundamental frequency light convert linearly polarized light to by elliptically polarized light, implementation space polarization state is mated;
It for receiving the fundamental frequency light of this process, and is coupled in the cavity of described annular frequency doubling cavity by described speculum by described pattern matching lens Len.
Further, the size of the light path part of this device can be set to 20 × 12 × 9cm
3.
Embodiment two
The present embodiment provides a kind of method using said apparatus to produce frequency doubled light, and as shown in Figure 2,1064nm fundamental frequency elliptically polarized light converts linearly polarized light to through λ/4 wave plate and λ/2 wave plate, and implementation space polarization state is mated.1064nm fundamental frequency light is coupled in annular frequency multiplication cavity by matched lenses, implementation space pattern matching.Annular chamber is made up of plane mirror M1, M2 and concave mirror M3, M4, wherein M1 be coupling mirror, for realize basic frequency beam from chamber to the coupling in chamber, its transmitance through special selection, to realize " impedance matching ".Mirror M 2, M3, M4 have high reflectance to fundamental frequency light, and wherein M4 has high permeability to frequency doubled light simultaneously, to realize effective extraction of 532nm frequency doubled light.PPKTP crystal both ends of the surface are all coated with the anti-reflection film to fundamental frequency light and second harmonic.Detector 1 in figure and detector 2 are for monitoring the imbalance between frequency doubling cavity optical maser wavelength and resonator cavity resonance wavelength.The error signal produced during imbalance through the process of servo control circuit system, and feeds back to the driver of frequency doubling cavity piezoelectric ceramic, long by the telescopic adjustment chamber of piezoelectric ceramic, realizes the tracking between frequency doubling cavity and laser and locking.When a certain frequency in laser frequency is combed with frequency doubling cavity resonance frequency is consistent, in chamber, luminous power obtains enhancing due to resonance effect, produces much larger than 532nm frequency doubled light power during once-through frequency-doubling crystal.
After the locking of 532nm annular frequency doubling cavity servo loop, the output power stability of double-frequency laser is measured with Thorlabs company optical power detector S310C.The output of light power meter is connected to the digital multimeter 2700 of keithley company, by its power excursion value of computer record.Measuring Time is 14578s, and wherein mean value, maxima and minima are respectively 0.21026V, 0.21087V, 0.20937V, and maximum luminous power was relatively drifted about and was period, and wherein the corresponding luminous power of minimum value is.532nm optical power stability experiment curv as shown in Figure 3.
The light path part of this miniaturized 1064nm laser frequency doubler is of a size of 20 × 12 × 9cm
3.
Above embodiment can reach following beneficial effect:
This device utilizes 1064nm frequency stabilized carbon dioxide laser and PPKTP frequency-doubling crystal, in conjunction with quasi-phase matched and annular outer-cavity frequency doubling technology, achieve 1064nm, 532nm stabilized lasers output that wavelength has exact multiple relation, there is the advantages such as wavelength, power stability are good, line width, can the wavelength linear degree of grating type spectrometer be calibrated; Achieve the miniaturization of 1064nm Frequency Stabilized Lasers standard of wavelength device, stable performance, compact conformation, antijamming capability are strong.
Those skilled in the art can also recognize the various illustrative components, blocks (illustrativelogical block) that the embodiment of the present invention is listed, unit, and step can pass through electronic hardware, computer software, or both combinations realize.For the replaceability (interchangeability) of clear displaying hardware and software, above-mentioned various illustrative components (illustrativecomponents), unit and step have universally described their function.Such function is the designing requirement realizing depending on specific application and whole system by hardware or software.Those skilled in the art for often kind of specifically application, can use the function described in the realization of various method, but this realization can should not be understood to the scope exceeding embodiment of the present invention protection.
Above-described embodiment; object of the present invention, technical scheme and beneficial effect are further described; be understood that; the foregoing is only the specific embodiment of the present invention; the protection range be not intended to limit the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. an integrated ring shaped laser frequency doubler, is characterized in that, comprising:
PPKTP (periodic polarized KTP) frequency-doubling crystal and annular frequency doubling cavity;
Wherein, described annular chamber comprises plane mirror M1, M2 and concave mirror M3, M4; Described PPKTP crystal both ends of the surface are all coated with the anti-reflection film to fundamental frequency light and second harmonic.
2. device according to claim 1, is characterized in that, described plane mirror M1 is coupling mirror, for receiving fundamental frequency light, with realize fundamental frequency light from chamber to the coupling in chamber; Transmitance according to described plane mirror M1 can realize " impedance matching ".
3. device according to claim 1, is characterized in that, described plane mirror M2, concave mirror M3 and concave mirror M4 have high reflectance to described fundamental frequency light;
Wherein said concave mirror M4 has high permeability to frequency doubled light.
4. device according to claim 1, is characterized in that, also comprises detector 1 and detector 2, and described detector 1 is positioned on the extended line of described M4, M1; Described detector 2 is positioned on the line extended line of described M1, M2; This detector 1 and detector 2 are for monitoring the imbalance situation between described annular frequency doubling cavity optical maser wavelength and resonator cavity resonance wavelength.
5. device according to claim 4, is characterized in that, also comprises servo control circuit system, and its input is connected with described detector 2, and its output is connected with the driver of the piezoelectric ceramic of described annular frequency doubling cavity;
The error signal produced when lacking of proper care between the described annular frequency doubling cavity optical maser wavelength of supervision that this servo control circuit system monitors for the treatment of this detector 1 and detector 2 and resonator cavity resonance wavelength; And result is fed back to the driver of the piezoelectric ceramic of described annular frequency doubling cavity.
6. device according to claim 5, it is characterized in that, the driver of the piezoelectric ceramic of described annular frequency doubling cavity, for controlling the flexible of the piezoelectric ceramic of described annular frequency doubling cavity, to regulate the chamber of described annular frequency doubling cavity long, and then the tracking realized between described annular frequency doubling cavity and 1064nm frequency stabilized carbon dioxide laser and locking.
7. the device according to any one of claim 1-5, is characterized in that, also comprises: 1064nm frequency stabilized carbon dioxide laser, λ/4 wave plate, λ/2 wave plate, pattern matching lens Len and speculum;
Wherein, this fundamental frequency light for generation of described fundamental frequency light, and is emitted to described λ/4 wave plate by described 1064nm frequency stabilized carbon dioxide laser;
Described λ/4 wave plate and λ/2 wave plate are used for successively receiving and processing described fundamental frequency light, and make this fundamental frequency light convert linearly polarized light to by elliptically polarized light, implementation space polarization state is mated;
It for receiving the fundamental frequency light of this process, and is coupled in the cavity of described annular frequency doubling cavity by described speculum by described pattern matching lens Len.
8. device according to claim 7, is characterized in that, the light path part of this device is of a size of 20 × 12 × 9cm
3.
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| CN105449511A (en) * | 2016-01-05 | 2016-03-30 | 中国科学院上海光学精密机械研究所 | Frequency-doubled solid-state laser in injection locking cavity |
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| CN107123926A (en) * | 2017-05-05 | 2017-09-01 | 中国科学技术大学 | The production method of super-narrow line width, tunable high power laser system and laser |
| CN107579409A (en) * | 2017-09-22 | 2018-01-12 | 合肥工业大学 | A kind of bright squeezed type light field generator |
| CN108683071A (en) * | 2018-07-05 | 2018-10-19 | 中国科学院福建物质结构研究所 | A kind of periodic polarized crystal waveguide device and laser with closed loop waveguiding structure |
| CN111262129A (en) * | 2020-01-19 | 2020-06-09 | 之江实验室 | 452nm frequency doubling system with adjustable power and capable of detecting offset |
| CN114199822A (en) * | 2021-12-10 | 2022-03-18 | 北京环境特性研究所 | Gas detection device and method |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105449511A (en) * | 2016-01-05 | 2016-03-30 | 中国科学院上海光学精密机械研究所 | Frequency-doubled solid-state laser in injection locking cavity |
| CN106842761A (en) * | 2017-03-15 | 2017-06-13 | 中国科学院上海光学精密机械研究所 | Optics cavity automatic locking apparatus and its lock cavity method based on analog circuit |
| CN107123926A (en) * | 2017-05-05 | 2017-09-01 | 中国科学技术大学 | The production method of super-narrow line width, tunable high power laser system and laser |
| CN107579409A (en) * | 2017-09-22 | 2018-01-12 | 合肥工业大学 | A kind of bright squeezed type light field generator |
| CN107579409B (en) * | 2017-09-22 | 2019-06-18 | 合肥工业大学 | A kind of bright squeezed type light field generator |
| CN108683071A (en) * | 2018-07-05 | 2018-10-19 | 中国科学院福建物质结构研究所 | A kind of periodic polarized crystal waveguide device and laser with closed loop waveguiding structure |
| CN108683071B (en) * | 2018-07-05 | 2023-06-09 | 中国科学院福建物质结构研究所 | Periodically polarized crystal waveguide device with closed-loop waveguide structure and laser |
| CN111262129A (en) * | 2020-01-19 | 2020-06-09 | 之江实验室 | 452nm frequency doubling system with adjustable power and capable of detecting offset |
| CN114199822A (en) * | 2021-12-10 | 2022-03-18 | 北京环境特性研究所 | Gas detection device and method |
| CN114199822B (en) * | 2021-12-10 | 2024-01-19 | 北京环境特性研究所 | Gas detection device and method |
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Application publication date: 20150325 |