CN104167659A - Method for adjusting mode matching of pump light and single-resonance optical parameter cavity - Google Patents
Method for adjusting mode matching of pump light and single-resonance optical parameter cavity Download PDFInfo
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- CN104167659A CN104167659A CN201410452706.1A CN201410452706A CN104167659A CN 104167659 A CN104167659 A CN 104167659A CN 201410452706 A CN201410452706 A CN 201410452706A CN 104167659 A CN104167659 A CN 104167659A
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Abstract
The invention provides a method for adjusting the mode matching of pump light and a single-resonance optical parametric cavity, which comprises the following steps: adjusting signal light to match with an optical parametric cavity mode; locking the optical parameter cavity to obtain the frequency-doubled light output of the signal light; adjusting the frequency-doubled light to match the auxiliary non-degenerate optical cavity mode; adjusting the pump light from the other direction to match the nondegenerate optical cavity mode; obtaining the mode matching of the pump light and the optical parametric cavity. The method has the advantages of convenient operation, high matching precision, visual result and good practical value.
Description
Technical field
The present invention relates to a kind of method that regulates pump light and single resonance optical parameter chamber pattern matching, specifically one utilizes a nondegenerate optics cavity to mate chamber as auxiliary mode, the pattern matching in off-resonance light beam and optical parameter chamber is converted to the method for light beam and compensated cavity pattern matching.
Background technology
Compressed state optical field is a kind of very important non-classical light field, can be applied to detection, the optical precision measurement of gravitational wave, the research field such as generation, quantum communication of entangled.Especially aspect quantum communication, two single-mode squeezing state light fields or a bimodulus compressed state optical field can be used to produce and tangle light, tangle basis and the core of light as quantum information, Quantum Teleportation, quantum secret communication, quantum dense coding and the quantum that can complete quantum entanglement exchange, ultraweak information pass the important principles experiment of the quantum communications fields such as state from thing.
Optical parametric oscillator process is the important technical that obtains compressed state optical field, according to the theory analysis of optics parametric oscillator (opo) quantum noise, can obtain the theoretical expression (P.K.Lam of quadrature component compression, T.C.Ralph, B.C.Buchler er al., Optimization and transfer of vacuum squeezing from an optical parametric oscillator, J.Opt.B:Quantum Semiclass.Opt.1 (1999) 469-474) as follows:
Wherein, η
escbe the escape efficiency of optics parametric oscillator (opo), under equal conditions, escape efficiency is higher, and the degree of compression of acquisition is higher.Escape efficiency is the ratio of optics parametric oscillator (opo) output coupled transmittance and total losses, and for fixing output coupled transmittance, the interior cavity loss in optical parameter chamber is less, and escape efficiency is higher.And interior cavity loss not only with chamber in the quality of optical element, and relevant with the mould matching efficiency in flashlight and optical parameter chamber.Mould matching efficiency is higher, and escape efficiency is higher, and the degree of compression is higher.Therefore, the raising of the pattern matching efficiency of flashlight is the key that obtains high-quality compression.From formula (a), another parameter that affects the degree of compression is the threshold value P in optical parameter chamber
th, the threshold value of optics parametric oscillator (opo) is higher, and the pump power that obtains same parametric gain needs is higher, and the raising of pump power can cause the thermal effect aggravation of nonlinear crystal, affects the acquisition of squeezed light.The power that simultaneously needs to improve pump light meets the requirement of Classical Gain, is that pump laser proposes requirements at the higher level.In the situation that other condition is identical, the threshold value P in optical parameter chamber
threlevant with the matching efficiency in optical parameter chamber with pump light, the matching efficiency in pump light and optical parameter chamber is higher, and the threshold value in optical parameter chamber is lower, more easily obtains high compactness light.In addition, if the pattern matching efficiency in pump light and optical parameter chamber is not high, pump light may excite the high-order transverse mode vibration in optical parameter chamber, affects pump light and the interactional efficiency of basic mode flashlight.Therefore, obtaining high efficiency pump light and optical parameter chamber pattern matching is another key factor that obtains high-quality compression.
Flashlight vibrates in optical parameter chamber, thereby the fineness of the long transmission signal of scanning chamber is higher, can observe main mould intensity and account for the ratio of all mode intensity, obtains pattern matching efficiency.Make pattern matching efficiency reach maximum by selecting suitable set of lenses and adjusting signal direction of light, General Requirements pattern matching efficiency is greater than 99%.In single resonance optical parameter chamber, pump light do not resonate in optical parameter chamber (be generally two time pass through), the fineness of transmission signal is very low, shape as shown in Figure 1, mate the bad little mould causing and be submerged in main mould, can not directly observe transmission signal and obtain the size of pattern matching efficiency.
In prior art; researcher can first change one group of chamber, optical parameter chamber mirror (in this chamber, the fineness of pump light is high) to pump light resonance conventionally; then select suitable set of lenses and adjust pumping direction of light to make pattern matching efficiency reach maximum, after matching, gain again the chamber mirror that pump light is not resonated.Change chamber mirror and not only bother, and long unavoidable variation of Renewal process lumen, actual pattern matching efficiency affected.
The another kind of method of prior art is under same pump power, the Classical Gain size in viewing optics parameter chamber, and Classical Gain is higher, shows that the pattern matching efficiency in pump light and optical parameter chamber is higher.The defect of the method is to compare the relative size of pattern matching efficiency in adjustment process (such as pattern matching efficiency is to improve or reduce), and and do not know the value (whether reaching 99%) of absolute mode matching efficiency, adjustment process is blindly.Thereby not only operating process is loaded down with trivial details, and not directly perceived to the measurement of pattern matching efficiency.
The present invention proposes a kind of method that regulates pump light and single resonance optical parameter chamber pattern matching, can be in the situation that not changing chamber, optical parameter chamber mirror, utilize auxiliary nondegenerate optics cavity, and can, by the numerical value of the direct acquisition model matching efficiency of transmission signal of observation compensated cavity, obtain pump light and the high efficiency pattern matching in optical parameter chamber.There is the advantages such as simple, accurate, directly perceived, there is important using value.
Summary of the invention:
The object of this invention is to provide a kind of easy, method of regulating accurately, intuitively pump light and single resonance optical parameter chamber pattern matching.
Core concept of the present invention is that the pattern matching that regulates non-resonant pump beam in optical parameter chamber is converted into the pattern matching that regulates the auxiliary nondegenerate optics cavity of pump beam and resonance.First, adopt the parameter that is placed on the set of lenses figure signal light in flashlight light path, flashlight is mated with optical parameter chamber implementation pattern; Then, the chamber length in locking optical parameter chamber makes flashlight strengthen at optical parameter chamber internal resonance, the frequency doubled light output of picked up signal light; As compensated cavity, the frequency doubled light of optical parameter chamber output is injected to nondegenerate optics cavity by a nondegenerate optics cavity, and frequency doubled light is mated by the parameter of set of lenses conversion frequency doubled light with nondegenerate optics cavity implementation pattern; Pump light is injected to compensated cavity from the another side of compensated cavity, and with set of lenses conversion pump light light beam parameters, pump light is mated with compensated cavity implementation pattern; Because pump light equates with frequency multiplication light wavelength, according to reversibility of optical path principle, realize pump light and optical parameter chamber pattern matching.
The invention provides a kind of method that regulates pump light and single resonance optical parameter chamber pattern matching, it is characterized in that comprising the following steps:
1), with being placed on first lens group figure signal light in the front signal light light path of the optical parameter chamber mode sizes in optical parameter chamber, flashlight is mated with the eigen mode implementation pattern in optical parameter chamber.
Before optical parameter chamber, insert the first lens group of proper focal length, the transverse mode size of figure signal light, makes its Transverse mode consistent with the eigen mode pattern in optical parameter chamber.Regulate the first leaded light mirror group, signal beams is overlapped completely at optical parameter chamber interior resonance and with its eigen mode, long by the chamber in the first piezoelectric ceramic scanning optical parameter chamber, be can be observed the transmission peaks curve of optical parameter chamber Output of laser by the 3rd detector.Because flashlight is the resonant beam in optical parameter chamber, fineness is higher, can obtain by the ratio of direct each pattern of observation transmission peaks the degree of flashlight and optical parameter chamber pattern matching.In a free spectral range, when the main peak of transmission peaks reach the highest and without secondary peak occur or secondary peak only account for total peak energy below 1% time, now realized the pattern matching in signal beams and optical parameter chamber.
2), the chamber in locking optical parameter chamber is long, make the chamber length in optical parameter chamber on signal light frequency, meet resonance and strengthen condition, picked up signal light frequency doubled light export.
After the chamber length in locking optical parameter chamber, in optical parameter chamber, the power density of flashlight is higher, in nonlinear crystal in optical parameter chamber, interact, the frequency doubled light output of picked up signal light, this frequency multiplication light wavelength is identical with pumping light wavelength, and the light beam parameters of light beam parameters (waist spot, the angle of divergence) during with pump light best pattern match is identical.
3), the frequency doubled light obtaining after the locking of optical parameter chamber is imported to an auxiliary nondegenerate optics cavity, by the mode sizes of the second set of lenses conversion frequency doubled light in nondegenerate optics cavity being placed between optical parameter chamber and nondegenerate optics cavity, frequency doubled light is mated with the eigen mode implementation pattern of nondegenerate optics cavity.
Choose all chambeies mirror all to the high anti-nondegenerate optics cavity of pump light as compensated cavity, thereby compensated cavity is all very high to the fineness of pump light (and frequency doubled light), can obtain by the ratio of direct each pattern of observation transmission peaks the degree of flashlight and optical parameter chamber pattern matching.Behind optical parameter chamber, insert the second set of lenses of proper focal length, the transverse mode size of conversion frequency multiplication light beam, makes its Transverse mode consistent with the eigen mode pattern of compensated cavity.Regulate the second leaded light mirror group, frequency multiplication light beam is overlapped completely at compensated cavity interior resonance and with its eigen mode, the chamber of scanning compensated cavity by the second piezoelectric ceramic is long, be can be observed the transmission peaks curve of compensated cavity Output of laser by the first detector.In a free spectral range, when the main peak of transmission peaks reach the highest and without secondary peak occur or secondary peak only account for total peak energy below 1% time, now realized the pattern matching of frequency multiplication light beam and compensated cavity.
4), by the mode sizes of the 3rd set of lenses conversion pump light in nondegenerate optics cavity that is placed on the nondegenerate optics cavity other end, pump light is mated with the eigen mode implementation pattern of nondegenerate optics cavity.
At the other end of compensated cavity, in the input path of pump light, insert the 3rd set of lenses of proper focal length, the transverse mode size of conversion pump beam, makes its Transverse mode consistent with the eigen mode pattern of compensated cavity.The 3rd light microscopic group is led in adjusting, and pump beam is overlapped completely at compensated cavity interior resonance and with its eigen mode, long by the chamber of the second piezoelectric ceramic scanning compensated cavity, be can be observed the transmission peaks curve of compensated cavity Output of laser by the second detector.In a free spectral range, when the main peak of transmission peaks reach the highest and without secondary peak occur or secondary peak only account for total peak energy below 1% time, now realized the pattern matching of pump beam and compensated cavity.
5), pump light equates with frequency doubled light wavelength, known according to reversibility of optical path principle, the eigen mode in pump light and optical parameter chamber has been realized pattern matching.
Described optics parametric oscillator (opo) is two mirror chambeies, three mirror cavity or four mirror chambeies etc.
In described optics parametric oscillator (opo), comprise optically nonlinear crystal.Nonlinear crystal obtains squeezed light for pump light and flashlight nonlinear interaction.Meanwhile, in the time of pump light and optical parameter chamber pattern matching, be used as frequency-doubling crystal.
Described in step 1), step 3) and step 4) set of lenses that adopts when implementation pattern coupling is the combination of one or more lens.Need to carry out choosing of set of lenses according to the parameter of the parameter of elementary beam and target beam, make elementary beam through the light beam after set of lenses conversion and chamber eigen mode waist spot equal and opposite in direction, position coincidence.
By the enforcement of the method, the pattern matching that regulates non-resonant pump beam in optical parameter chamber can be converted into the pattern matching that regulates pump beam and resonance compensated cavity.There is the advantages such as easy, efficient and accurate, significant to obtaining high-quality squeezed light output device.
The method of adjusting pump light of the present invention and single resonance optical parameter chamber pattern matching has the following advantages compared with traditional method:
(1) the high anti-chamber mirror of pump light is carried out compared with the method for pattern matching with changing, the method does not need to change the chamber mirror in optical parameter chamber, but the off-resonance mould that is difficult for observing pattern matching efficiency is mated to the pattern matching that is converted to off-resonance mould and compensated cavity with optical parameter chamber, avoid the long variation in chamber, optical parameter chamber in the mirror Renewal process of chamber, there is the easy and accurate advantage of adjusting.
(2) compared with the method for carrying out pattern matching with the Classical Gain in viewing optics parameter chamber, the method is the height of readout mode matching efficiency directly, has directly perceived and efficient advantage.
Brief description of the drawings
When Fig. 1 is scanning optical parameter chamber, the transmission peaks curve of pump beam
Fig. 2 utilizes nondegenerate three mirror optics cavity as compensated cavity, regulates pump beam and two mirror optical parameter chamber pattern matching, and the device schematic diagram of flashlight, pump light generation
Fig. 3 is in embodiment 1, when scanning three mirror nondegenerate optics cavity, and the transmission peaks curve of frequency doubled light
Fig. 4 utilizes nondegenerate two mirror optics cavity as compensated cavity, regulates pump beam and four mirror optical parameter chamber pattern matching, and the device schematic diagram of flashlight, pump light generation
In figure: 1-optical parameter chamber, 2-flashlight, 3-pump light, 4-first lens group, 5-the first leaded light mirror group, 6-nonlinear crystal, the frequency doubled light of 7-flashlight, 8-beam splitting dichroic mirror, 9-the second set of lenses, 10-the second leaded light mirror group, 11-nondegenerate optics cavity, 12-the 3rd leaded light mirror group, 13-the 3rd set of lenses, 14-the first piezoelectric ceramic, 15-the second piezoelectric ceramic, 16-the first detector, 17-the second detector, 18-the first refrative mirror, 19-the second refrative mirror, 20-the 3rd detector, 21-laser, 22-optical beam-splitter, 23-frequency doubling cavity.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is made to further description.Following examples are used for illustrating the present invention, but are not used for limiting the scope of the invention.
Embodiment 1. utilizes nondegenerate three mirror optics cavity as compensated cavity, regulates pump beam and two mirror optical parameter chamber pattern matching, and the device of flashlight, pump light generation, as shown in Figure 2.
The light beam that laser 21 is exported becomes two-beam after optical beam-splitter 22, a branch of flashlight 2 as optical parameter chamber 1, and another bundle injects frequency doubling cavity 23, obtains two frequency multiplication outputs, as the pump light 3 in optical parameter chamber 1.The output wavelength of laser 21 is 1064nm, and the wavelength of two frequencys multiplication is 532nm.Regulate pump light 3 as follows with the step of optical parameter chamber 1 pattern matching: first, in flashlight 2 light paths before optical parameter chamber 1, add first lens group 4 and the first leaded light mirror group 5, first lens group 4 is used for adjusting waist spot position and the size of flashlight 2 in optical parameter chamber 1, and the lens combination of choosing different focal is identical with the eigen mode in optical parameter chamber 1 by the parameter transformation of flashlight 2.The direction of propagation that the first leaded light mirror group 5 is used for adjusting flashlight 2 overlaps with the eigen mode in optical parameter chamber 1.Chamber by the first piezoelectric ceramic 14 scanning optical parameter chambeies 1 is long, be can be observed the transmission peaks curve of optical parameter chamber 1 Output of laser by the 3rd detector 20.In a free spectral range, when the main peak of transmission peaks reach the highest and without secondary peak occur or secondary peak only account for total peak energy 1% below time, now realized the pattern matching in signal beams 2 and optical parameter chamber 1.Optical parameter chamber 1 is made up of two concave mirrors and a PPKTP crystal 6, as nonlinear crystal.The radius of curvature of two concave mirrors is 50mm, and PPKTP crystal 6 is of a size of 1*2*10mm, and the chamber length in optical parameter chamber 1 is 102.8mm, and corresponding eigen mode radius is 34 μ m, is positioned at the centre in optical parameter chamber 1.First lens group 4 comprises that focal length is-each a slice of lens of 150mm and 200mm.The first leaded light mirror group 5 is made up of two level crossings to flashlight 2 high anti-(45 degree), regulates the first leaded light mirror group 5 to make flashlight 2 and optical parameter chamber 1 realize best pattern match, and matching efficiency is greater than 99%.Then, the chamber length in optical parameter chamber 1 is locked onto on the formant of flashlight 2 with PDH frequency-stabilizing method, now optical parameter chamber has frequency doubled light 7 to export, and the wavelength of frequency doubled light 7 equates with the wavelength of pump light 3.Again, behind optical parameter chamber 1, add beam splitting dichroic mirror 8 that frequency doubled light 7 and residual signal light 2 are separated.In frequency doubled light light path, add the second set of lenses 9, the second leaded light mirror group 10 and nondegenerate optics cavity 11, the second set of lenses 9 is used for adjusting waist spot position and the size of frequency doubled light 7 in nondegenerate optics cavity 11, and the lens combination of choosing different focal is identical with the eigen mode of nondegenerate optics cavity 11 by the parameter transformation of frequency doubled light 7.The direction of propagation that the second leaded light mirror group 10 is used for adjusting frequency doubled light 7 overlaps with the eigen mode of nondegenerate optics cavity 11.Nondegenerate optics cavity 11 is as the compensated cavity of pattern matching, and it is by two level crossings and the three mirror annular chambers that concave mirror forms, and the radius of curvature of concave mirror is 1m, and the chamber length of nondegenerate optics cavity 11 is 450mm, and in chamber, waist spot radius is 426 μ m.The second set of lenses 9 comprises that focal length is-each a slice of lens of 100mm and 200mm.The second leaded light mirror group 10 is made up of the level crossing of two frequency doubled lights 7 to flashlight high anti-(45 degree).Utilize the first refrative mirror 18 that transmitted light is imported to the first detector 16, regulate the second leaded light mirror group 10, the chamber of scanning nondegenerate optics cavity 11 by the second piezoelectric ceramic 15 is long, make frequency doubled light 7 most effective with the pattern matching of nondegenerate optics cavity 11, Fig. 3 is the pattern matching result of frequency doubled light 7 and nondegenerate optics cavity 11, and pattern matching efficiency is greater than 99%.Finally, pump light 3 is imported nondegenerate optics cavity 11 from other direction by the 3rd leaded light mirror group 12, in the light path of pump light 3, insert the 3rd set of lenses 13, utilize the second refrative mirror 19 that transmitted light is imported to the second detector 17, regulate the parameter of the 3rd set of lenses 13 and regulate the 3rd leaded light mirror group 12, the chamber of scanning nondegenerate optics cavity 11 by the second piezoelectric ceramic 15 is long, make pump light 3 most effective with the pattern matching of nondegenerate optics cavity 11, obtain the pattern matching in pump light 3 and optical parameter chamber 1.The 3rd set of lenses 13 comprise focal length be 150mm and-each a slice of lens of 100mm.
Embodiment 2. utilizes nondegenerate two mirror optics cavity as compensated cavity, regulates pump beam and four mirror optical parameter chamber pattern matching, and the device of flashlight, pump light generation, as shown in Figure 4.
The light beam that laser 21 is exported becomes two-beam after optical beam-splitter 22, a branch of flashlight 2 as optical parameter chamber 1, and another bundle injects frequency doubling cavity 23, obtains two frequency multiplication outputs, as the pump light 3 in optical parameter chamber 1.The output wavelength of laser 21 is 1064nm, and the wavelength of two frequencys multiplication is 532nm.Regulate pump light 3 as follows with the step of optical parameter chamber 1 pattern matching: first, in flashlight 2 light paths before optical parameter chamber 1, add first lens group 4 and the first leaded light mirror group 5, first lens group 4 is used for adjusting waist spot position and the size of flashlight 2 in optical parameter chamber 1, and the lens combination of choosing different focal is identical with the eigen mode in optical parameter chamber 1 by the parameter transformation of flashlight 2.The direction of propagation that the first leaded light mirror group 5 is used for adjusting flashlight 2 overlaps with the eigen mode in optical parameter chamber 1.Chamber by the first piezoelectric ceramic 14 scanning optical parameter chambeies 1 is long, be can be observed the transmission peaks curve of optical parameter chamber 1 Output of laser by the 3rd detector 20.In a free spectral range, when the main peak of transmission peaks reach the highest and without secondary peak occur or secondary peak only account for total peak energy 1% below time, now realized the pattern matching in signal beams 2 and optical parameter chamber 1.Optical parameter chamber 1 is by two concave mirrors, two level crossings and a LiNbO
3crystal 6 forms, as nonlinear crystal.The radius of curvature of two concave mirrors is 100mm, and total chamber length in optical parameter chamber 1 is 622.8mm, and the distance between two concave mirrors is 108mm, and corresponding eigen mode radius is 25 μ m, LiNbO
3crystal 6 is of a size of 3*3*12mm, is arranged in the centre of 1 two concave mirrors in optical parameter chamber.First lens group 4 comprises that focal length is-each a slice of lens of 150mm and 150mm.The first leaded light mirror group 5 is made up of two level crossings to flashlight 2 high anti-(45 degree), regulates the first leaded light mirror group 5 to make flashlight 2 and optical parameter chamber 1 realize best pattern match, and matching efficiency is greater than 99%.Then, the chamber length in optical parameter chamber 1 is locked onto on the formant of flashlight 2 with PDH frequency-stabilizing method, now optical parameter chamber has frequency doubled light 7 to export, and the wavelength of frequency doubled light 7 equates with the wavelength of pump light 3.Again, behind optical parameter chamber 1, add beam splitting dichroic mirror 8 that frequency doubled light 7 and residual signal light 2 are separated.In frequency doubled light light path, add the second set of lenses 9, the second leaded light mirror group 10 and nondegenerate optics cavity 11, the second set of lenses 9 is used for adjusting waist spot position and the size of frequency doubled light 7 in nondegenerate optics cavity 11, and the lens combination of choosing different focal is identical with the eigen mode of nondegenerate optics cavity 11 by the parameter transformation of frequency doubled light 7.The direction of propagation that the second leaded light mirror group 10 is used for adjusting frequency doubled light 7 overlaps with the eigen mode of nondegenerate optics cavity 11.Nondegenerate optics cavity 11 is used as the compensated cavity of pattern matching, the two mirror nondegenerate optics cavity that it is made up of two concave mirrors, and the radius of curvature of two concave mirrors is 50m, and the chamber length of nondegenerate optics cavity 11 is 103mm.The second set of lenses 9 comprises that focal length is-each a slice of lens of 200mm and 200mm.The second leaded light mirror group 10 is made up of two level crossings to flashlight 2 high anti-(45 degree).Utilize the first refrative mirror 18 that transmitted light is imported to the first detector 16, regulate the second leaded light mirror group 10, the chamber of scanning nondegenerate optics cavity 11 by the second piezoelectric ceramic 15 is long, makes frequency doubled light 7 most effective with the pattern matching of nondegenerate optics cavity 11, is greater than 99%.Finally, pump light 3 is imported nondegenerate optics cavity 11 from other direction by the 3rd set of lenses 13, in the light path of pump light 3, insert the 3rd set of lenses 13, utilize the second refrative mirror 19 that transmitted light is imported to the second detector 17, regulate the parameter of the 3rd set of lenses 13 and regulate the 3rd leaded light mirror group 12, the chamber of scanning nondegenerate optics cavity 11 by the second piezoelectric ceramic 15 is long, makes pump light 3 most effective with the pattern matching of nondegenerate optics cavity 11, is greater than 99%.Obtain the pattern matching in pump light 3 and optical parameter chamber 1.The 3rd set of lenses 13 comprise focal length be 200mm and-each a slice of lens of 100mm.
Above-described embodiment has just provided the method for the most simply utilizing three mirrors and two mirror nondegenerate optics cavity to regulate pump light and two mirrors and four mirror lists resonance optical parameter chamber, does not describe all possibilities.In fact, can also regulate by other chamber shape nondegenerate optics cavity single resonance optical parameter chamber of other chamber shape, be the scope that the present invention is contained.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of the technology of the present invention principle; can also make some improvement and replacement, these improvement and replacement also should be considered as protection scope of the present invention.
Claims (5)
1. a method that regulates pump light and single resonance optical parameter chamber pattern matching, is characterized in that, comprises the following steps:
1), with being placed on first lens group (4) figure signal light (2) in optical parameter chamber (1) front signal light (2) the light path mode sizes in optical parameter chamber (1), flashlight (2) is mated with the eigen mode implementation pattern of optical parameter chamber (1);
2), the chamber in locking optical parameter chamber (1) is long, make the chamber length in optical parameter chamber (1) in the frequency of flashlight (2), meet resonance enhancing condition, frequency doubled light (7) output of picked up signal light (2);
3), the frequency doubled light (7) obtaining after optical parameter chamber (1) locking is imported to an auxiliary nondegenerate optics cavity (11), with being placed on the mode sizes of the second set of lenses (9) between optical parameter chamber (1) and nondegenerate optics cavity (11) conversion frequency doubled light in nondegenerate optics cavity (11), frequency doubled light (7) is mated with the eigen mode implementation pattern of nondegenerate optics cavity (11);
4), by the mode sizes of the 3rd set of lenses (13) conversion pump light (3) in nondegenerate optics cavity (11) that is placed on nondegenerate optics cavity (11) another side, pump light (3) is mated with the eigen mode implementation pattern of nondegenerate optics cavity (11);
5), pump light (3) equates with frequency doubled light (7) wavelength, known according to reversibility of optical path principle, pump light (3) has been realized pattern matching with the eigen mode in optical parameter chamber (1).
2. a kind of method that regulates pump light and single resonance optical parameter chamber pattern matching as claimed in claim 1, is characterized in that, described optics parametric oscillator (opo) (1) is two mirror chambeies, three mirror cavity or other many mirror chamber.
3. a kind of method that regulates pump light and single resonance optical parameter chamber pattern matching as claimed in claim 1, is characterized in that, in described optics parametric oscillator (opo) (1), comprises optically nonlinear crystal (6).
4. a kind of method that regulates pump light and single resonance optical parameter chamber pattern matching as claimed in claim 1, it is characterized in that, in step 1), step 3) and step 4) implementation pattern when coupling the set of lenses that adopts be the combination of one or more lens.
5. a kind of method that regulates pump light and single resonance optical parameter chamber pattern matching as claimed in claim 1, is characterized in that, described nondegenerate optics cavity (11) is two mirror chambeies, three mirror cavity or other many mirror chamber.
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