CN103066491A - High-repetition frequency blue violet laser - Google Patents

High-repetition frequency blue violet laser Download PDF

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CN103066491A
CN103066491A CN2012105630817A CN201210563081A CN103066491A CN 103066491 A CN103066491 A CN 103066491A CN 2012105630817 A CN2012105630817 A CN 2012105630817A CN 201210563081 A CN201210563081 A CN 201210563081A CN 103066491 A CN103066491 A CN 103066491A
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light
frequency
mirror
high
alkali metal
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CN2012105630817A
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陈飞
高飞
李殿军
谢冀江
杨贵龙
张来明
郭劲
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中国科学院长春光学精密机械与物理研究所
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Priority to CN2012105630817A priority Critical patent/CN103066491A/en
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Abstract

The invention provides a high-repetition frequency blue violet laser, relates to the technical field of novel lasers, and solves the problems that an existing solid laser is low in laser output power and laser optical quality. The blue violet laser comprises a laser diode (LD) pumping source, a transmission optical fiber, a coupling lens assembly, an alkali metal vapor pond, a resonant cavity, an acousto-optic Q-switch, a convex lens, a first reflector, a second reflector and a frequency doubling crystal. The LD pumping source emits pump light, the transmission optical fiber conveys the pump light into the coupling lens assembly for coupling focus, then the pump light enters the alkali metal vapor pond, alkali metal atoms can carry out effectively population inversion, and then pulse fundamental frequency light can be generated through modulation of the acousto-optic Q-switch and feedback effect of the resonant cavity. The pulse fundamental frequency light is output through an output mirror, focused by the convex lens and then reflected by the first reflector to enter the frequency doubling crystal, the pulse fundamental frequency light is partially conversed into blue violet frequency doubling light, and then the blue violet frequency doubling light is reflected by the second reflector, enters the frequency doubling crystal and is output through the first reflector. The high-repetition frequency blue violet laser is high in laser output power and laser optical quality.

Description

一种高重复频率蓝紫激光器 Blue-violet laser is a high-repetition rate

技术领域 FIELD

[0001] 本发明涉及新型激光器技术领域,具体涉及一种高重复频率蓝紫激光器。 [0001] The present invention relates to novel laser technology, and in particular, to a blue-violet laser with high repetition frequency.

背景技术 Background technique

[0002] 蓝紫激光光源在激光光谱学、原子物理、激光医疗、环境监测、激光显示及激光水下通信与探测等一系列基础研究、高科技产品开发和国防工程中有着非常重要的作用。 [0002] In a series of blue-violet laser light source of basic research of laser spectroscopy, atomic physics, laser medical treatment, environmental monitoring, laser show and laser detection of underwater communications and other high-tech product development and national defense construction has a very important role.

[0003] 目前,蓝紫激光光源多采用半导体激光(Laser Diode, LD)泵浦的固体激光器(Diode Pumped Solid State Lasers, DPSSL)结构,它是基于倍频LD栗浦的惨Nd3+准三能级激光(O. 9 μ m)的方法来实现。 [0003] At present, the blue-violet semiconductor laser light source using multiple laser (Laser Diode, LD) pumped solid state lasers (Diode Pumped Solid State Lasers, DPSSL) structure, which is based on the LD frequency Nd3 + Li Pu suffer quasi-three level laser (O. 9 μ m) is achieved. 然而,利用这种方法的固体激光器存在以下问题:首先,掺Nd3+准三能级激光的受激发射截面相对较小,且与四能级激光(1. 06 μ m&l. 34 μ m)存在增益竞争,为实现O. 9 μ m激光的优先振荡,须掺杂浓度较低、长度较短的掺Nd3+激光介质,这制约到激光输出功率的提高;其次,该类激光运转还受再吸收和能量上转换等效应的影响,为抑制这些效应所产生的不利影响,亦须降低介质的掺杂浓度和缩短其长度;另外,随LD注入泵浦功率的增加,固体激光介质内产生严重的热效应,影响着激光输出功率的提高和光束质量的改善,从而也影响到倍频效率的提高。 However, with this method the presence of a solid laser following problems: First, Nd3 + doped quasi-three level laser emission cross section is relatively small, and there is a four-level laser gain (1. 06 μ m & l 34 μ m.) competition for the realization of priority laser oscillation O. 9 μ m shall doping concentration is low, the shorter the length of the laser medium doped with Nd3 +, which restricts the increase of the laser output power; second, also by the operation of such a laser and resorption impact energy up-conversion effects, etc., to suppress the adverse effects arising from these effects, the doping concentration of the medium must also decrease and shortening its length; Further, with the increasing pump power injected into the LD, a serious thermal effect within the solid-state laser medium influence increased output power and improved laser beam quality, which also affects the frequency increase efficiency. 因此,现有的基于倍频DPSSL的蓝紫激光器在提高激光的输出功率和改善激光光束质量等方面都非常受限,因此,迫切需要研制出一种高效率、高功率、高重复频率的蓝紫激光器。 Thus, based on conventional multiplier DPSSL violet lasers are very limited in terms of increased power output and improved laser beam quality such as a laser, therefore, an urgent need to develop a high-efficiency, high power, high repetition rate Blue violet laser.

发明内容 SUMMARY

[0004] 为了解决现有的基于倍频LD泵浦的掺Nd3+准三能级激光的固体激光器存在的激光输出功率低、激光光束质量低的问题,本发明提供一种高效率、高功率的高重复频率蓝紫激光器。 [0004] In order to solve the conventional problems based on the presence of low Nd3 + doped quasi-three level laser output power of the laser frequency solid state lasers LD pumped, the laser beam quality is low, the present invention provides a high efficiency, high power blue-violet laser with high repetition frequency.

[0005] 本发明为解决技术问题所采用的技术方案如下: [0005] The present invention is to solve the Problem The technical solution is as follows:

[0006] 一种高重复频率蓝紫激光器,包括: [0006] A blue-violet laser with high repetition frequency, comprising:

[0007] 由发射泵浦光的LD泵浦源、传输泵浦光的传输光纤和耦合聚焦泵浦光的耦合透镜组组成的泵浦光源结构,将泵浦光转换为基频光的碱金属蒸汽池,对基频光起反馈调节作用的谐振腔,调制产生脉冲基频光的声光Q开关,汇聚脉冲基频光的凸透镜,与脉冲基频光光路呈45°的第一反射镜,与脉冲基频光光路平行的第二反射镜和将脉冲基频光转换为蓝紫倍频光的倍频晶体; [0007] LD emitted by the pump source of pump light, and pump light source coupled to the transmission fiber structure focused pump light transmission coupling lens group composed of the pump light, the pump light is converted to an alkali metal base frequency light steam pool, fundamental frequency light from feedback regulation of the resonant cavity, the acousto-optic modulator to produce a fundamental frequency Q-switched pulse light, a convex lens converge the light pulse base frequency, the fundamental frequency of the pulse shape of the first light path of the mirror 45 °, and a second mirror base frequency pulse group with pulses of light path parallel to the optical frequency converters for the frequency doubling crystal violet light;

[0008] 所述谐振腔为平凸非稳腔,主要由对基频光高反射的前腔镜、用于分开基频光和泵浦光的偏振片和用于输出脉冲基频光的输出镜组成,所述偏振片放置在所述耦合透镜组和碱金属蒸汽池之间,其放置是对泵浦光高透过但对基频光高反射,所述输出镜放置在所述声光Q开关和凸透镜之间; [0008] The resonator is a plano-convex unstable resonator, the fundamental frequency of the light mainly by highly reflective front mirror, a polarizer for separating the fundamental and the pumping light and for outputting the output pulse of the fundamental light mirrors, the polarizing plate disposed between the coupling lens cell group and an alkali metal vapor, which is placed high pump light transmitted through a light but highly reflective to the fundamental frequency, the output mirror placed in the acousto-optic Q and switching between the convex lens;

[0009] 所述LD泵浦源发射的泵浦光由所述传输光纤输出至所述耦合透镜组,由耦合透镜组耦合聚焦进入所述碱金属蒸汽池中,使碱金属原子产生有效的粒子数反转,在声光Q开关的调制作用和平凸非稳腔的反馈作用下产生一定重复频率的脉冲基频光,经输出镜输出的脉冲基频光再由凸透镜聚焦并由第一反射镜反射进入倍频晶体中,脉冲基频光部分转换为蓝紫倍频光,剩余的基频光再由第二反射镜反射进入倍频晶体中,从而充分地利用基频光能量以获得最大的倍频效率,最终蓝紫倍频光经过第一反射镜输出。 [0009] The pump LD pump source emitting light transmitted by the optical fiber coupled to the output lens group, is coupled by the coupling lens group focuses the alkali metal vapor into the pool, the alkali metal atom to produce effective particle inversions, certain fundamental light generates a pulse repetition frequency in the feedback planoconvex unstable resonator acousto-optic modulation of Q switch pulse base frequency output by the output mirror lens focuses the light and then by the first mirror reflected into the frequency doubling crystal, the frequency of the light pulse base frequency portion is converted into the blue-violet light, and then the remaining fundamental light reflected by the second mirror into the frequency doubling crystal in order to fully utilize the energy of the fundamental frequency light to obtain the maximum doubling efficiency, the final blue-violet light through a first multiplier output mirror.

[0010] 在所述声光Q开关和输出镜之间增加一个碱金属蒸汽池、一个偏振片和一组泵浦光源结构,所述碱金属蒸汽池靠近所述声光Q开关放置,所述泵浦光源结构靠近所述输出镜放置。 [0010] adding an alkali metal vapor reservoir between the acousto-optic Q-switch and the output mirror, a polarizing plate and a set of pump light source structure, the alkali metal vapor reservoir close to the acousto-optic Q-switch is placed, said pump light source structure disposed adjacent the output mirror.

[0011] 在所述声光Q开关和增加的一个碱金属蒸汽池之间放置有第三光阑。 [0011] a third aperture disposed between the acousto-optic Q-switch and an increase in alkali metal vapor pool.

[0012] 所述耦合透镜组主要由第一透镜和第二透镜组成,放置在所述传输光纤和偏振片之间。 [0012] The coupling lens group mainly composed of the first and second lenses, disposed between the transmission fiber and the polarizer.

[0013] 所述前腔镜、输出镜、第一反射镜和第二反射镜的表面镀有膜,所述前腔镜表面镀有基频光波段的高反膜;所述输出镜表面镀有基频光波段的部分反射膜,所述第一反射镜表面镀有基频光波段高反膜和倍频光波段增透膜;所述第二反射镜表面镀有基频光与倍频光波段高反膜。 [0013] The front mirror, the mirror surface of the output, a first mirror and a second mirror coated with a film, the front surface of the mirror coated with a highly reflective film fundamental light wavelength band; the output mirror plated a base frequency band portion of the light-reflecting film, a mirror surface coated with a first fundamental light frequency band of the high-reflection film and optical band antireflection film; a second mirror surface coated with the fundamental light frequency optical band high-reflection film.

[0014] 在所述碱金属蒸汽池与声光Q开关之间放置有第一光阑,在所述输出镜和凸透镜之间放置有第二光阑。 [0014] A first diaphragm is placed between the tank and the alkali metal vapor acousto-optic Q-switch, a second aperture disposed between the output mirror and the lens.

[0015] 一种高重复频率蓝紫激光器,包括:由发射泵浦光的LD泵浦源、传输泵浦光的传输光纤和耦合聚焦泵浦光的耦合透镜组组成的两组泵浦光源结构,将泵浦光转换为基频光的两个碱金属蒸汽池,对基频光起反馈调节作用的谐振腔,调制产生脉冲基频光的声光Q开关和将脉冲基频光转换为蓝紫倍频光的倍频晶体; [0015] A blue-violet laser with high repetition frequency, comprising: a structure composed of two groups of pump light sources LD emitting the pump light of the pump source, the coupling lens group transmission optical fiber transmission pump light coupling and the focusing of the pump light composed of the pump light is converted to an alkali metal vapor two pools of fundamental frequency light, the light from the fundamental frequency of the resonator feedback regulation, the modulation frequency of the light pulse is generated based acousto-optic Q-switch pulse and converting fundamental light blue frequency multiplier crystal violet light;

[0016] 所述谐振腔为Z型折叠腔,主要由对基频光高反射的两片高反射镜、用于分开基频光和泵浦光的两个偏振片、用于输出蓝紫倍频光的第一凹面镜以及第二凹面镜组成,所述偏振片放置在与之对应的耦合透镜组和碱金属蒸汽池之间,其放置是对泵浦光高透过但对基频光高反射,所述倍频晶体放置在第一凹面镜和第二凹面镜之间的基频光振荡束腰处; [0016] The resonator is a Z-folded cavity, the light fundamental frequency mainly by highly reflective two highly reflective mirrors, polarizing plates for separating the fundamental and two pumping light, for outputting a blue-violet times a first concave mirror and the optical frequency of the second concave mirror, the polarizing plate is placed between the corresponding coupling lens cell group and an alkali metal vapor, which is placed high pump light transmitted through the fundamental frequency but high light reflecting the frequency doubling crystal disposed between the first concave mirror and the second concave mirror at the waist oscillating fundamental light;

[0017] 所述LD泵浦源发射的泵浦光由所述传输光纤输出至所述耦合透镜组,由耦合透镜组耦合聚焦进入所述碱金属蒸汽池中,使碱金属原子产生有效的粒子数反转,在声光Q开光的调制和Z型折叠腔的反馈作用下在腔内形成一定重复频率的基频振荡光,从而使位于基频振荡光束腰处的倍频晶体产生非线性效应,形成蓝紫倍频光由第一凹面镜输出。 [0017] The pump LD pump source emitting light transmitted by the optical fiber coupled to the output lens group, is coupled by the coupling lens group focuses the alkali metal vapor into the pool, the alkali metal atom to produce effective particle inversions, form the fundamental frequency constant repetition frequency oscillation light in the cavity under the action of the feedback modulation acousto-optic Q and Z of the folded cavity of the opening, so that the oscillation frequency of the frequency doubling crystal group located at the waist of the light generating nonlinear effect, form a blue-violet light output from the first multiplier concave mirror.

[0018] 在所述碱金属蒸汽池与声光Q开关之间放置有光阑。 [0018] The diaphragm is placed between the tank and the alkali metal vapor acousto-optic Q-switch.

[0019] 所述耦合透镜组主要由第一透镜和第二透镜组成,位于所述传输光纤和偏振片之间。 [0019] The coupling lens group mainly composed of the first and second lenses, and the polarizing plate positioned between said transmission optical fiber.

[0020] 所述高反射镜、第一凹面镜和第二凹面镜的表面镀有膜,所述高反射镜表面镀有基频光波段的高反膜;所述第一凹面镜表面镀有基频光波段的高反膜和倍频光波段的增透膜;所述第二凹面镜表面镀有基频光和倍频光波段的高反膜。 [0020] The high reflector mirror, a first concave mirror and the second concave mirror surfaces are coated with a film, the mirror surface coated with a high reflective coating of high optical band of the fundamental frequency; said first concave surface is plated with high reflective film and a baseband frequency band of the optical band of the light anti-reflection coating; a second concave surface coated with a high reflecting film baseband frequency doubled light wavelength band light.

[0021] 本发明的有益效果是:第一种技术方案是将基于声光调Q的碱金属蒸汽激光器作为基频光光源,通过平凸非稳腔腔外双程倍频的方式,获得高重复频率输出的蓝紫激光。 [0021] Advantageous effects of the present invention is: a first aspect of the light source is a frequency acousto-optic Q based on alkali metal vapor laser as a group, through the outer chamber plano-convex unstable resonator mode frequency of the two-way, to obtain a high blue-violet laser repetition frequency output. 优点为:1)采用平凸非稳腔结构,实现基频光的大模体积运转;2)基频光的输出与倍频过程分离,不仅提高了蓝紫倍频激光输出的稳定性,也方便了蓝紫激光器的装调;3)通过声光调Q获得高重复频率碱金属激光,具有较高的峰值功率,可在倍频晶体内产生高的基频光功率密度;4)腔外双程倍频充分利用了基频光,具有高的倍频转换效率。 Advantages: 1) a plano-convex unstable resonator structure, to achieve a large volume operation mode of fundamental light; 2) the output of the fundamental light frequency separation process, not only improves the stability of the blue-violet laser output frequency, and facilitate assembly and adjustment of the blue-violet laser; 3) by the acousto-optic Q alkali metal to obtain a high repetition rate laser with high peak power, produces a high optical power density of the fundamental frequency in the frequency doubling crystal; 4 outer) chamber Two-way full use of the fundamental frequency doubling of light having a high SHG conversion efficiency.

[0022] 第二种技术方案采用Z型折叠腔,将基于声光调Q的碱金属蒸汽激光器作为基频光光源,通过Z型折叠腔腔内倍频的方式,获得高重复频率输出的蓝紫激光。 [0022] A second aspect of Z-type folded cavity, the acousto-optic Q based on alkali metal vapor laser as a light source baseband, by intracavity frequency doubling cavity Z-folded manner, to obtain a high repetition rate output blue violet laser. 优点为:采用Z型折叠腔,Z型折叠腔对热效应以及腔形的微变不敏感,可实现蓝紫倍频激光的稳定输出。 Advantages: the use of Z-folded cavity, Z-folded cavity insensitive to thermal effects and a cavity shaped slightly changed, stable output frequency blue-violet laser light can be achieved.

附图说明 BRIEF DESCRIPTION

[0023] 图1为本发明的采用平凸非稳腔的高重复频率蓝紫激光器的结构示意图; High repetition rate plano-convex unstable resonator laser of blue-violet [0023] Figure 1 is a schematic structural diagram of the invention;

[0024] 图2为本发明的采用平凸非稳腔的双LD泵浦源双碱金属蒸汽池的高重复频率蓝紫激光器的结构示意图; Schematic structural diagram of a plano-convex unstable resonator using a dual source LD pumped alkali metal vapor bis pool [0024] FIG. 2 of the present invention, the blue-violet laser, high repetition rate;

[0025] 图3为本发明的采用Z型折叠腔的高重复频率蓝紫激光器的结构示意图。 [0025] Fig 3 a schematic view of the structure of Z-type folding chamber high repetition rate of the blue-violet laser of the present invention.

具体实施方式 Detailed ways

[0026] 以下结合附图对本发明作进一步详细说明。 [0026] conjunction with the drawings of the present invention will be further described in detail.

[0027] 具体实施方式一、如图1所示,为本发明的一种高重复频率蓝紫激光器的第一种技术方案,是将基于声光调Q的碱金属蒸汽激光器作为基频光光源,通过平凸非稳腔腔外双程倍频的方式,获得高重复频率输出的蓝紫激光,该蓝紫激光器包括泵浦光源结构、碱金属蒸汽池7、谐振腔、第一光阑8、声光Q开关9、第二光阑11、凸透镜12、第一反射镜13、第二反射镜15和倍频晶体14。 [0027] a particular embodiment, shown in Figure 1, a blue-violet laser is a high-repetition rate of a first aspect of the present invention is based on the acousto-optic Q alkali metal vapor laser as a light source fundamental frequency , through the outer chamber plano-convex unstable resonator mode frequency of the two-way, to obtain blue-violet laser with high repetition frequency output, the pump light source comprises a blue-violet laser structure, the alkali metal vapor cell 7, the resonant cavity, a first diaphragm 8 , acousto-optic Q-switch 9, the second aperture 11, lens 12, first mirror 13, second mirror 15 and doubling crystal 14.

[0028] 本实施方式中的泵浦光源结构由LD泵浦源1、传输泵浦光的传输光纤2和耦合透镜组组成。 [0028] The pumping light source structure of the present embodiment is composed of a pump source LD 1, the coupling lens 2 and the transmission fiber transmitting the pump light group.

[0029] 本实施方式中的LD泵浦源I发射的泵浦光为P方向的线偏振光,通过传输光纤2或其它方式进入耦合透镜组。 [0029] The present embodiment is LD pumped emitted pump light source I is linearly polarized light in the P direction, into the transmission fiber via the coupling lens group 2 or otherwise.

[0030] 本实施方式中的耦合透镜组是由第一透镜3和第二透镜4组成的,用于耦合聚焦泵浦光,泵浦光经过耦合透镜组的耦合聚焦在碱金属蒸汽池7中。 [0030] The embodiment according to the present embodiment is coupled by a first lens group and the second lens 3 composed of lens 4 for focusing the pump light coupling, coupling the pump light coupling through a focusing lens group in the alkali metal vapor cell 7 .

[0031] 本实施方式中的碱金属蒸汽池7用于将泵浦光转换为基频光,实现基频光增益,碱金属蒸汽池7内充有适量的碱金属蒸汽和缓冲气体,缓冲气体为氦气和乙烷,碱金属蒸汽池7的两端窗口镀有泵浦光和基频光波段的高透膜,且其一端窗口呈布儒斯特角,这样在平凸非稳腔腔内形成的基频光为s方向的线偏振光。 [0031] The alkali metal vapor cell 7 according to the present embodiment for the pump light is converted to baseband light, to achieve optical gain of the fundamental frequency, an alkali metal vapor reservoir filled with an appropriate amount of an alkali metal vapor and a buffer gas 7, the buffer gas ethane and helium, the alkali metal vapor reservoir coated with both ends of the window 7 of the pump light and the fundamental frequency band of the high light-permeable membrane, and one end of the window as a Brewster angle, so that the stable resonator cavity plano-convex non- s fundamental light to form lines in a direction of polarized light.

[0032] 本实施方式中的谐振腔为L形的平凸非稳腔,对基频光起反馈调节作用,并用于实现基频光输出,主要由对基频光高反射的前腔镜5、用于分开基频光和泵浦光的偏振片6和用于输出脉冲基频光的输出镜10组成,前腔镜5为非球面平凸镜,表面镀有基频光波段的高反膜;偏振片6放置在所述耦合透镜组和碱金属蒸汽池7之间,其放置是对P方向偏振的泵浦光高透但对s方向偏振的基频光高反;输出镜10放置在所述声光Q开关9和凸透镜12之间,输出镜10为平面镜,表面镀有基频光波段的部分反射膜,在前腔镜5和输出镜10之间形成基频光,基频光通过输出镜10输出至用于汇聚基频光的凸透镜12中。 [0032] The present embodiment is an L-shaped resonant cavity is a plano-convex unstable resonator, the light from the base frequency feedback regulation, and for realizing fundamental frequency light output, the light fundamental frequency mainly by highly reflective front mirror 5 a polarizing plate for separating the fundamental frequency light and pumping light 6 and for outputting a pulse frequency of the light output lens group 10 composed of the front mirror planoconvex aspheric mirror 5, the surface coated with the fundamental frequency of the optical band high trans film; polarizing plate 6 is placed between the coupling lens group and the alkali metal vapor cell 7, which is placed in the direction of P-polarized pump light permeability but high s-polarized direction of light having a high frequency of anti-yl; output mirror 10 is placed between the acousto-optic Q-switch 9 and the convex lens 12, output mirror 10 is a plane mirror, the surface coating of the fundamental frequency band of the light-reflecting film is formed between the fundamental light mirror 5 and the output mirror 10 first, the fundamental frequency the light output by the output mirror 10 to the lens for converging the light frequency group 12.

[0033] 本实施方式中的声光Q开关9对基频光进行调制产生脉冲基频光,声光Q开关9用于实现基频光高重复频率输出,声光Q开关9放置在碱金属蒸汽池7与输出镜10之间,声光Q开关9使蓝紫激光器工作在调Q状态,在声光Q开关9与碱金属蒸汽池7之间放置有第一光阑8,以限制基频光在平凸非稳腔腔内的边缘振荡,从而改善基频光光束模式。 [0033] The present embodiment described acousto-optic Q-switch 9 of the base frequency of pulsed light to generate baseband modulating light, an acousto-optic Q-switch 9 for realizing the fundamental light output high repetition rate, acousto-optic Q-switch 9 is placed in an alkali metal between the steam 7 and the output mirror pool 10, acousto-optic Q-switch 9 in a blue-violet laser Q-working state, the acousto-optical Q-switch disposed between 7 and 9 have an alkali metal vapor reservoir first diaphragm 8, to limit the group light frequency at the edge of the plano-convex unstable resonator cavity oscillations, thereby improving the fundamental light beam pattern. [0034] 本实施方式中的凸透镜12用于汇聚脉冲基频光,凸透镜12将脉冲基频光汇聚进倍频晶体14内,倍频晶体14与凸透镜12之间放置一个与脉冲基频光光路呈45°的第一平面反射镜13,其表面镀有基频光波段的高反膜和倍频光波段的增透膜。 [0034] The present embodiment is a convex lens 12 for converging the pulse base frequency of the light, a convex lens 12 into the converged light pulses baseband frequency doubling crystal 14, doubling crystal 14 is placed between the convex lens 12 and a fundamental frequency of the pulse beam path 45 ° to the first plane mirror 13, on its surface and a high reflective film fundamental light frequency band coated optical band AR coating.

[0035] 本实施方式中的倍频晶体14可将脉冲基频光转换为蓝紫倍频光,倍频晶体14的另一端放置有与脉冲基频光光路平行的第二反射镜15,其表面镀有基频光与倍频光波段的闻反月旲。 [0035] The frequency doubling crystal 14 in the present embodiment may be pulsed fundamental light frequency is converted to a blue-violet light, the other end of the doubling crystal 14 is placed in the beam path parallel to the pulse frequency of the second mirror group 15, which the surface coated with the fundamental light frequency of the optical band anti month Dae smell.

[0036] 在本实施方式中的输出镜10和凸透镜12之间放置有第二光阑11,其作用是防止腔外双程倍频过程中反射回的基频光进入平凸非稳腔,提高基频光的工作稳定性。 [0036] In the present embodiment, an output mirror placed in the second aperture 11 between the lens 10 and 12, whose function is to prevent external cavity frequency doubling in two-way fundamental light reflected back into the plano-convex unstable resonator, improve the stability of the fundamental light.

[0037] 本实施方式中的LD泵浦源I发射的泵浦光由传输光纤2输出至耦合透镜组,由耦合透镜组耦合聚焦进入碱金属蒸汽池7中,使碱金属原子产生有效的粒子数反转,在声光Q开关9的调制作用和谐振腔的反馈作用下产生一定重复频率的脉冲基频光,由输出镜10输出的脉冲基频光再由凸透镜12聚焦并由第一反射镜13反射进入倍频晶体14中,脉冲基频光部分转换为蓝紫倍频光,剩余的基频光再由第二反射镜15反射进入倍频晶体14中,从而充分利用基频光能量以获得最大的倍频效率。 [0037] The present embodiment is LD pumped source I emitted from the pumping light output to the transmission fiber coupling lens group 2, is coupled by the coupling lens group focuses the alkali metal vapor into the reservoir 7, the alkali metal atom to produce effective particle inversions, must generate a pulse group repetition frequency in the frequency modulation of the optical feedback cavity and acousto-optic Q-switch 9, a pulse-base-output from the output mirror 10 and then by the frequency of light reflected by the first focusing lens 12 mirror 13 into the light receiving portion 14 frequency-doubling crystal, the pulse base frequency is converted to a blue-violet light, the remaining fundamental light re-entering the frequency doubling crystal 14 by the second reflection mirror 15, so that full use of the fundamental frequency light energy to maximize doubling efficiency. 这样脉冲基频光在由第一平面反射镜13和第二平面反射镜15构成的倍频腔中两次通过倍频晶体14,从而实现腔外双程倍频,由倍频晶体14产生蓝紫倍频光,蓝紫倍频光经过第一反射镜13输出。 Such fundamental light pulse by the first plane mirror and a second harmonic cavity mirror plane 15 consisting of two 13 by frequency doubling crystal 14, the external cavity in order to achieve dual frequency generated by the frequency doubling crystal 14 blue doubled light purple, blue-violet light through a first frequency output reflecting mirror 13.

[0038] 本实施方式中的LD泵浦源I发射的泵浦光有多种可能,可以发射波长为766.7nm、780 .2nm或852 . 3nm的泵浦光,分别对应碱金属蒸汽池7中的钾蒸汽、铷蒸汽和铯蒸汽这三种激光介质的泵浦波长,发射哪种泵浦光根据碱金属蒸汽池7中的碱金属蒸汽激光介质而定。 [0038] The present embodiment is LD pumped emitted pump light source I There are many possible, the emission wavelength of 766.7nm, 780 .2nm or 852. 3nm pump light, respectively corresponding to the alkali metal vapor cell 7 steam potassium, rubidium, cesium vapor and steam three pump wavelengths of the laser medium, according to which the pump light emitted alkali alkali metal vapor laser medium reservoir 7 may be steam.

[0039] 本实施方式中由声光Q开关9调制产生的770.1 nm、795. O nm或894. 6 nm的脉冲基频光,分别对应碱金属蒸汽池7中的钾蒸汽、铷蒸汽和铯蒸汽三种激光介质。 [0039] 770.1 nm in the present embodiment produced by the acousto-optic Q-switch modulator 9, 795. O nm or 894. 6 nm fundamental laser pulse, corresponding potassium alkali metal vapor steam reservoir 7, rubidium, and cesium vapor steam three kinds of laser medium.

[0040] 本实施方式中的蓝紫激光器输出的蓝紫倍频光的波长可以为385. O nm、397. 5 nm或447. 3 nm,分别对应钾激光、铷激光和铯激光这三种基频光。 [0040] harmonic wavelength blue-violet light of the present embodiment may be a blue-violet laser output 385. O nm, 397. 5 nm or 447. 3 nm, respectively laser potassium, rubidium, and cesium laser three laser fundamental light.

[0041]以铷蒸汽激光介质为例,本实施方式所述的蓝紫激光器的具体工作过程为:LD泵浦源I发射的780. 2 nm泵浦光经传输光纤2输出,由第一透镜3和第二透镜4 I禹合聚焦进入铷蒸汽池中,在泵浦激励作用下实现铷蒸汽原子的有效粒子数反转,在声光Q开关9的调制作用和谐振腔的反馈作用下产生按一定重复频率输出的795 . Onm脉冲铷激光,脉冲铷激光再由凸透镜12聚焦进入倍频晶体14中,在倍频晶体14中产生非线性效应作用,最后输出波长为397. 5 nm的蓝紫倍频光。 [0041] In the rubidium vapor laser medium, the detailed operation of the present embodiment, the blue-violet laser is: 780. 2 nm pump source I LD pumping light is emitted from the second output transmission fiber, a first lens 3 and the second focusing lens 4 I and Yu rubidium vapor enters the pool, the number of particles effective steam rubidium atoms in pumping the reverse effect, resulting in the feedback modulation of an acousto-optic Q-switch 9 and the resonant cavity according to a certain repetition frequency output 795. Onm pulsed laser rubidium, rubidium pulsed laser enters a convex lens 12 and then focused frequency doubling crystal 14, the role of generating nonlinear effects in the frequency doubling crystal 14, the final output of 397. 5 nm wavelength blue purple doubled light.

[0042] 具体实施方式二、如图2所示,在图1所示的第一种技术方案基础上,在上述声光Q开关9和输出镜10之间增加一个碱金属蒸汽池7、一个偏振片6和一组泵浦光源结构,碱金属蒸汽池7靠近所述声光Q开关9放置,泵浦光源结构靠近所述输出镜10放置,通过增大增益体积和提高LD的注入泵浦功率来增大碱金属激光的输出功率,本实施方式中的蓝紫激光器所实现的功能与具体实施方式一中的相同。 [0042] DETAILED Embodiment 2, as shown, on the basis of a first aspect shown in Figure 1, the increase in a pool 7 an alkali metal vapor, a 2 between said acousto-optical Q-switch 10 and the output mirror 9 polarizing plate 6 and a plurality of pump light source structure, the alkali metal vapor reservoir 7 is close to the acousto-optic Q-switch 9 is placed, a pump light source structure 10 is placed closer to the output mirror, and a volume increase by increasing the gain of the injection pump LD power to increase the output power of the laser beam an alkali metal, in a particular embodiment the same functions as the embodiment of the present embodiment, the blue-violet laser is achieved.

[0043] 本实施方式中的偏振片6、碱金属蒸汽池7和泵浦光源结构的功能和组成均与第一种技术方案中所说的完全相同。 [0043] The polarizing plate according to the present embodiment 6, the function and composition of the alkali metal vapor cell 7 and the pump light source and said structure are of a first aspect of the same.

[0044] 在本实施方式中的声光Q开关9和增加的一个碱金属蒸汽池7之间放置有第三光阑16。 [0044] In the acousto-optic Q-switch in the present embodiment 9 and the embodiment of an increase in alkali metal vapor reservoir 16 is placed between the third aperture 7. [0045]以钾蒸汽激光介质为例,本实施方式所述的蓝紫激光器的具体工作过程为:由LD泵浦源I发射的766. 7 nm泵浦光经传输光纤2输出,从平凸非稳腔两端由第一透镜3和第二透镜4耦合聚焦进入钾蒸汽池,在泵浦激励作用下实现钾蒸汽原子的有效粒子数反转,在声光Q开关9的调制作用和谐振腔的反馈作用下产生按一定重复频率输出的770.1nm脉冲钾激光,脉冲钾激光再由凸透镜12聚焦进入倍频晶体14中,在倍频晶体14中产生非线性效应作用,最后输出波长为385. O nm的蓝紫倍频光。 [0045] The potassium vapor laser medium, the detailed operation of the present embodiment, the blue-violet laser is: 766. 7 nm emitted by LD pumped pump light source via the I 2 output transmission fiber, from planoconvex unstable resonator both ends of the focusing lens 3 by the coupling of the first and the second lens 4 into the pool of potassium vapor, to achieve effective potassium vapor atomic number of particles in the reversed pumping the effect, acousto-optic modulation of the Q-switch 9 and the resonant 770.1nm potassium generating pulsed laser output at a certain repetition frequency of the feedback chamber, potassium pulsed laser light re-entering the convex lens 12 focusing the frequency doubling crystal 14, the role of generating nonlinear effects in the frequency doubling crystal 14, the final output wavelength 385 . O nm blue-violet light frequency.

[0046] 具体实施方式三、如图3所示,为本发明的一种高重复频率蓝紫激光器的第二种技术方案,与具体实施方式一所述的第一种技术方案为并列的技术方案,该技术方案米用Z型折叠腔,将基于声光调Q的碱金属蒸汽激光器作为基频光光源,通过Z型折叠腔腔内倍频的方式,获得高重复频率输出的蓝紫激光,该蓝紫激光器包括:两组泵浦光源结构、两个碱金属蒸汽池7、谐振腔、声光Q开关9和倍频晶体11 ; [0046] DETAILED Embodiment 3, shown in Figure 3, a second aspect of a high-repetition rate of the blue-violet laser of the present invention, the particular embodiment of the first aspect is a parallel technique embodiment, this solution with m Z-folded cavity, the acousto-optic Q based on alkali metal vapor laser frequency as a blue-violet laser light source group, the Z-folded cavity intracavity frequency doubling manner, to obtain a high repetition rate output the blue-violet laser comprising: a pump light source two structures, two alkali metal vapor cell 7, the resonant cavity, the acousto-optic Q-switch 9 and the frequency doubling crystal 11;

[0047] 本实施方式中的泵浦光源结构为两组,每组泵浦光源结构均包括用于发射泵浦光的LD泵浦源1、用于传输泵浦光的传输光纤2和用于耦合聚焦泵浦光的耦合透镜组,Z型折叠腔位于两组泵浦光源结构之间。 [0047] The pumping light source structure of the present embodiment is two, each pump light source LD structure includes a pump source for emitting a pump light, a transmission optical fiber for transmitting pump light 2 and a a coupling lens coupled to the focusing of the pump light group, Z is located between the two-folded cavity pump light source structure.

[0048] 本实施方式中的LD泵浦源I发射的泵浦光为P方向的线偏振光,通过传输光纤2或其它方式进入耦合透镜组。 [0048] The present embodiment is LD pumped emitted pump light source I is linearly polarized light in the P direction, into the transmission fiber via the coupling lens group 2 or otherwise.

[0049] 本实施方式中的耦合透镜组是由第一透镜3和第二透镜4组成的,用于耦合聚焦泵浦光,泵浦光经过耦合透镜组的耦合聚焦在碱金属蒸汽池7中。 [0049] The embodiment according to the present embodiment is coupled by a first lens group and the second lens 3 composed of lens 4 for focusing the pump light coupling, coupling the pump light coupling through a focusing lens group in the alkali metal vapor cell 7 .

[0050] 本实施方式中的碱金属蒸汽池7数量为两个,分别接收来自两个泵浦光源结构的泵浦光,用于将泵浦光转换为基频光,实现基频光增益,每个碱金属蒸汽池7内充有适量的碱金属蒸汽和缓冲气体,缓冲气体为氦气和乙烷,碱金属蒸汽池7的两端窗口镀有泵浦光和基频光波段的高透膜,且其中的一端窗口呈布儒斯特角,这样在Z型折叠腔腔内形成的基频光为s方向的线偏振光。 [0050] The alkali metal vapor present embodiment pool 7 two in number, receive pump light from a pump light source two structures for the pump light is converted to baseband light, to achieve optical gain fundamental frequency, each alkali metal vapor with a pool filled with an appropriate amount of the alkali metal vapor 7 and a buffer gas, the buffer gas is helium and ethane, the alkali metal vapor plating tank 7 at both ends of the window pump light wavelength band of the fundamental frequency of high permeability film, and wherein an end of the window as a Brewster angle, so that the group Z-folded cavity optical cavity formed in the pilot line of s-polarized light.

[0051] 本实施方式中的谐振腔为Z型折叠腔,对基频光起反馈调节作用,并用于实现基频光输出,主要由对基频光高反射的两片高反射镜5、用于分开基频光和泵浦光的两个偏振片6、用于输出蓝紫倍频光的第一凹面镜10以及第二凹面镜12组成,高反射镜5表面镀有基频光波段的高反膜;偏振片6放置在与之对应的耦合透镜组和碱金属蒸汽池7之间,其放置是对P方向偏振的泵浦光高透但对S方向偏振的基频光高反;第一凹面镜10表面镀有基频光波段的高反膜和倍频光波段的增透膜;第二凹面镜12表面镀有基频光和倍频光波段的闻反I旲,在两片闻反射镜5之间形成基频光。 [0051] This embodiment of the resonant cavity is a Z-folded cavity, the base of light from frequency feedback regulation, and for realizing fundamental frequency light output, mainly of fundamental frequency light highly reflective two high reflection mirror 5, with in separate fundamental and two pumping light polarizing plate 6 for outputting a blue-violet light in the first frequency and a second concave mirror 10 composed of a concave mirror 12, highly reflective surface mirror 5 coated with the fundamental frequency of the optical band high reflective film; polarizing plate 6 is placed between the corresponding coupling lens group and the alkali metal vapor cell 7, which is placed in the direction of polarization of the pumping light P high permeability but S-polarized fundamental light direction high back; a first concave surface 10 is antireflection coated high reflective film and a base band frequency doubled light wavelength band; a second concave surface 12 coated with fundamental and harmonic light wavelength band I smell anti-Dae, the two Wen fundamental light sheet is formed between the mirrors 5.

[0052] 本实施方式中的倍频晶体11放置在第一凹面镜10和第二凹面镜12之间所形成的基频光振荡束腰处,进一步提高了脉冲基频光在倍频晶体11内的功率密度,基频光振荡束腰的位置是由第一凹面镜10和第二凹面镜12的曲率半径大小决定的。 [0052] The frequency doubling crystal 11 of the present embodiment, the first concave mirror 10 is placed in the oscillation light beam waist and the second concave 12 is formed between the fundamental frequency, the fundamental frequency is further improved pulsed light frequency doubling crystal 11 power density, the oscillation light beam waist position of the fundamental frequency is determined by the first concave mirror 10 and the radius of curvature of the second concave mirror 12 is determined by the size.

[0053] 本实施方式中的声光Q开关9对基频光进行调制产生脉冲基频光,声光Q开关9用于实现基频光的高重复频率振荡,声光Q开关9放置在碱金属蒸汽池7与第一凹面镜10之间,声光Q开关9使蓝紫激光器工作在调Q状态,在声光Q开关9与碱金属蒸汽池7之间放置有光阑8,以限制基频光在Z型折叠腔腔内的边缘振荡,从而改善基频光光束模式。 [0053] The present embodiment described acousto-optic Q-switch 9 of the base frequency of pulsed light to generate baseband modulating light, an acousto-optic Q-switch 9 for realizing a high repetition rate oscillating fundamental laser, acousto-optic Q-switch 9 is placed on base the metal vapor reservoir 7 between the first concave mirror 10 and the acousto-optic Q-switch 9 blue-violet laser operates in Q-state, the acousto-optical Q-switch disposed between 7 and 9 have an alkali metal vapor reservoir diaphragm 8, to limit oscillating fundamental light at the edge of the Z-folded cavity chamber, thereby improving the fundamental light beam pattern.

[0054] 本实施方式中的LD泵浦源I发射的泵浦光由传输光纤2输出至耦合透镜组,由耦合透镜组耦合聚焦进入碱金属蒸汽池7中,使碱金属原子产生有效的粒子数反转,在声光Q开关9的调制和谐振腔的反馈作用下在腔内形成一定重复频率的基频振荡光,从而使位于基频振荡光束腰处的倍频晶体11产生非线性效应,形成蓝紫倍频光由第一凹面镜10输出。 [0054] The present embodiment is LD pumped source I emitted from the pumping light output to the transmission fiber coupling lens group 2, is coupled by the coupling lens group focuses the alkali metal vapor into the reservoir 7, the alkali metal atom to produce effective particle inversions, form the fundamental frequency constant repetition frequency oscillation light in the cavity under the action of the feedback modulation and acousto-optic Q-switch in the resonator 9, so that the frequency doubling crystal is located at the beam waist 11 generate a nonlinear fundamental frequency oscillation effect, the output of the multiplier is formed by a first concave mirror 10 blue-violet light. 本实施方式中的LD泵浦源I发射的泵浦光有多种可能,可以发射波长为766 . 7nm、780. 2nm或852. 3 nm的泵浦光,分别对应碱金属蒸汽池7中的钾蒸汽、铷蒸汽和铯蒸汽这三种激光介质的泵浦波长,发射哪种泵浦光根据碱金属蒸汽池7中的碱金属蒸汽激光介质而定。 LD of the present embodiment, a pump source emitting pump light with a plurality of I may be an emission wavelength of 766. 7nm, 780. 2nm or 852. 3 nm pump light, respectively corresponding to the alkali metal vapor pool 7 steam potassium, rubidium, cesium vapor and steam three pump wavelengths of the laser medium, according to which the pump light emitted alkali alkali metal vapor laser medium reservoir 7 may be steam.

[0055] 本实施方式中由声光Q开关9调制产生的770.1 nm、795. O nm或894. 6 nm的脉冲基频光,分别对应碱金属蒸汽池7中的钾蒸汽、铷蒸汽和铯蒸汽三种激光介质。 [0055] 770.1 nm in the present embodiment produced by the acousto-optic Q-switch modulator 9, 795. O nm or 894. 6 nm fundamental laser pulse, corresponding potassium alkali metal vapor steam reservoir 7, rubidium, and cesium vapor steam three kinds of laser medium.

[0056] 本实施方式中的蓝紫激光器输出的蓝紫倍频光的波长可以为385. O nm、397. 5 nm或447 . 3nm,分别对应钾激光、铷激光和铯激光这三种基频光。 [0056] harmonic wavelength blue-violet light of the present embodiment may be a blue-violet laser output 385. O nm, 397. 5 nm or 447. 3nm, respectively laser potassium, rubidium, and cesium laser laser three-yl frequency light.

[0057]以铯蒸汽激光介质为例,本实施方式所述的蓝紫激光器的具体工作过程为:由LD泵浦源I发射的852. 3 nm泵浦光经传输光纤2输出,从Z型折叠腔两端由第一透镜3和第二透镜4耦合聚焦进入到两个铯蒸汽池中,在泵浦激励作用下实现铯蒸汽原子的有效粒子数反转,通过声光Q开关9的调制和Z型折叠腔的反馈振荡作用在腔内实现894. 6 nm铯激光的高重复频率振荡,脉冲基频光在倍频晶体11中产生非线性效应作用,最后由第一凹面镜10输出波长为447 . 3nm的蓝紫倍频光。 [0057] cesium vapor laser medium, the detailed operation of the present embodiment, the blue-violet laser is: 852. 3 nm emitted by LD pumped pump light source via the I 2 output transmission fiber, from Z- folding both ends of cavity 4 by the coupling of the first lens enters the second focusing lens 3 and two cesium vapor to the pool, the number of particles effective reversal of cesium atoms in the vapor pumping the action modulated by acousto-optic Q-switch 9 and a Z-folded cavity feedback oscillation effect achieved cesium 894. 6 nm laser light at high repetition rate cavity oscillation pulse base frequency light generating nonlinear effects role in the frequency doubling crystal 11, the wavelength of the last 10 output from the first concave mirror blue-violet light multiplier 447. 3nm to.

[0058] 本发明提供的一种高重复频率的蓝紫激光器,经查阅有关资料尚未发现有与本发明相同或相似的记载。 [0058] The blue-violet laser is a high-repetition rate provided by the present invention, the access to such information has not been found to have the same or similar to the present invention is described. 表I所示为本发明的蓝紫激光器中,每种碱金属蒸汽激光介质分别对应的泵浦光波长、基频光波长和最终获得的蓝紫倍频光波长。 Blue-violet laser is shown in Table I of the present invention, each of the alkali metal vapor laser medium respectively corresponding to the wavelength of the pump light, and a blue-violet light wavelength group harmonic frequency light having a wavelength of the finally obtained.

[0059]表 I [0059] TABLE I

[0060] [0060]

Figure CN103066491AD00091

Claims (10)

1. 一种高重复频率蓝紫激光器,其特征在于,包括: 由发射泵浦光的LD泵浦源(1)、传输泵浦光的传输光纤(2)和耦合聚焦泵浦光的耦合透镜组组成的泵浦光源结构,将泵浦光转换为基频光的碱金属蒸汽池(7),谐振腔,调制产生脉冲基频光的声光Q开关(9),汇聚脉冲基频光的凸透镜(12),与脉冲基频光光路呈45°的第一反射镜(13),与脉冲基频光光路平行的第二反射镜(15)和将脉冲基频光转换为蓝紫倍频光的倍频晶体(14); 所述谐振腔为平凸非稳腔,主要由对基频光高反射的前腔镜(5)、用于分开基频光和泵浦光的偏振片(6)和用于输出脉冲基频光的输出镜(10)组成,所述偏振片(6)放置在所述耦合透镜组和碱金属蒸汽池(7 )之间,其放置是对泵浦光高透过但对基频光高反射,所述输出镜(10)放置在所述声光Q开关(9)和凸透镜(12)之间; 所述LD泵浦源( A blue-violet laser with high repetition frequency, characterized by comprising: a pump source LD emitting the pump light (1), pump light transmission fiber transmission (2) and the coupling of the pump light coupling lens focusing a pumping light source structure of the group consisting of the pump light is converted to an alkali metal vapor reservoir (7) of the fundamental beam, the resonant cavity, the acousto-optic modulator generating Q switch (9) of the light pulse base frequency, the fundamental frequency of the light pulses converged a first convex mirror (12), with the pulse base frequency of 45 ° beam path (13), with the pulse base frequency light path parallel to the second mirror (15) and the pulsed light is converted to baseband frequency violet light frequency doubling crystal (14); said cavity is a plano-convex unstable resonator, the fundamental frequency of the main polarizing light and pumping light of a fundamental frequency light highly reflective front mirror (5), for separating ( 6) for outputting a pulse frequency of the light output lens group (10) composed of the polarizer (6) placed between the coupling lens group and the alkali metal vapor reservoir (7), the pump light is placed high permeability but high fundamental frequency reflection light, the output mirror (10) positioned between said acousto-optical Q-switch (9) and a convex lens (12); said pump source LD ( 1)发射的泵浦光由所述传输光纤(2)输出至所述耦合透镜组,由耦合透镜组耦合聚焦进入所述碱金属蒸汽池(7)中,使碱金属原子产生有效的粒子数反转,在声光Q开关(9)的调制作用和平凸非稳腔的反馈作用下产生一定重复频率的脉冲基频光,由输出镜(10)输出的脉冲基频光再由凸透镜(12)聚焦并由第一反射镜(13)反射进入倍频晶体(14)中,脉冲基频光部分转换为蓝紫倍频光,剩余的基频光再由第二反射镜(15)反射进入倍频晶体(14)中,从而充分利用基频光能量获得最大的倍频效率,最终蓝紫倍频光经过第一反射镜(13)输出。 1) transmitting the pump light emitted by the optical fiber (2) to the group of the coupling lens, the coupling lens group focuses coupled into the alkali metal vapor reservoir (7), the alkali metal atom to produce a valid number of particles inversion, generates a pulse group repetition frequency of a certain frequency of light in the acousto-optic Q-switch (9) of the planoconvex feedback modulation of the unstable resonator, the output mirror (10) pulse-base-output light reuse frequency by a convex lens (12 ) by the first focusing reflector (13) reflected into the frequency doubling crystal (14), the frequency of the light pulse base frequency portion is converted into the blue-violet light, and then the remaining fundamental light (15) reflected by the second mirror into the frequency doubling crystal (14), so that full use of light energy output baseband frequency for maximum efficiency, the final frequency violet light through a first mirror (13).
2.根据权利要求1所述的一种高重复频率蓝紫激光器,其特征在于,在所述声光Q开关(9)和输出镜(10)之间增加一个碱金属蒸汽池(7)、一个偏振片(6)和一组泵浦光源结构,所述碱金属蒸汽池(7)靠近所述声光Q开关(9)放置,所述泵浦光源结构靠近所述输出镜(10)放置。 A high repetition rate of the blue-violet laser according to claim 1, wherein the alkali metal vapor to increase a pool (7) between the acousto-optic Q-switch (9) and the output mirror (10), a polarizing plate (6) and a set of pump light source structure, the alkali metal vapor reservoir (7) close to the acousto-optic Q-switch (9) is placed closer to the structure of the pump light source output mirror (10) is placed .
3.根据权利要求2所述的一种高重复频率蓝紫激光器,其特征在于,在所述声光Q开关(9 )和增加的一个碱金属蒸汽池(7 )之间放置有第三光阑(16 )。 The repetition frequency of a high blue-violet laser according to claim 2, characterized in that, between the acousto-optic Q-switch (9) and an increase in alkali metal vapor reservoir (7) is placed a third light À (16).
4.根据权利要求1所述的一种高重复频率蓝紫激光器,其特征在于,所述耦合透镜组主要由第一透镜(3)和第二透镜(4)组成,放置在所述传输光纤(2)和偏振片(6)之间。 The repetition frequency of a high blue-violet laser according to claim 1, characterized in that the coupling mainly consists of a first lens group lens (3) and a second lens (4) consisting of, disposed in the transmission fiber (2) and the polarizer (6) between.
5.根据权利要求1所述的一种高重复频率蓝紫激光器,其特征在于,所述前腔镜(5)、输出镜(10)、第一反射镜(13)和第二反射镜(15)的表面镀有膜,所述前腔镜(5)表面镀有基频光波段的高反膜;所述输出镜(10)表面镀有基频光波段的部分反射膜,所述第一反射镜(13)表面镀有基频光波段高反膜和倍频光波段增透膜;所述第二反射镜(15)表面镀有基频光与倍频光波段高反膜。 The repetition frequency of a high blue-violet laser according to claim 1, wherein said front mirror (5), an output mirror (10), a first mirror (13) and the second mirror ( surface 15) is coated with a film, said front mirror (5) a surface coated with a high reflective coating of the fundamental frequency band of light; the output mirror (10) a surface coated with light-reflecting film of the fundamental frequency band, said first a mirror (13) plated fundamental light frequency band of the high-reflection film and optical band antireflection film; with the second reflecting mirror (15) and plated fundamental light frequency band of the high light-reflection film.
6.根据权利要求1所述的一种高重复频率蓝紫激光器,其特征在于,在所述碱金属蒸汽池(7)与声光Q开关(9)之间放置有第一光阑(8),在所述输出镜(10)和凸透镜(12)之间放置有第二光阑(11)。 The repetition frequency of a high blue-violet laser according to claim 1, wherein the alkali metal vapor between said reservoir (7) and the acousto-optic Q-switch (9) is placed with a first diaphragm (8 ), between said output mirror (10) and a convex lens (12) is placed with a second aperture (11).
7. 一种高重复频率蓝紫激光器,其特征在于,包括:由发射泵浦光的LD泵浦源(I )、传输泵浦光的传输光纤(2)和耦合聚焦泵浦光的耦合透镜组组成的两组泵浦光源结构,将泵浦光转换为基频光的两个碱金属蒸汽池(7),对基频光起反馈调节作用的谐振腔,调制产生脉冲基频光的声光Q开关(9)和将脉冲基频光转换为蓝紫倍频光的倍频晶体(11);所述谐振腔为Z型折叠腔,主要由对基频光高反射的两片高反射镜(5)、用于分开基频光和泵浦光的两个偏振片(6)、用于输出蓝紫倍频光的第一凹面镜(10)以及第二凹面镜(12)组成,所述偏振片(6)放置在与之对应的耦合透镜组和碱金属蒸汽池(7)之间,其放置是对泵浦光高透过但对基频光高反射,所述倍频晶体(11)放置在第一凹面镜(10)和第二凹面镜(12)之间的基频光振荡束腰处; 所述LD泵浦源(I)发射的泵浦光 A blue-violet laser with high repetition frequency, characterized by comprising: a pump source LD (I) emitting pump light, the pump light transmission fiber transmission (2) and the coupling of the pump light coupling lens focusing two pump light source group consisting of the structure, the two pump light is converted to an alkali metal vapor reservoir (7) of the fundamental frequency light, feedback regulation of the resonant cavity light from the fundamental frequency, the fundamental frequency of the acoustic pulse generated modulation light Q-switch (9) and the pulse fundamental light is converted to blue-violet light frequency doubling crystal (11); said resonator cavity is a Z-folded, mainly by two highly reflective to the fundamental frequency of the reflected light with high mirror (5), for separating the fundamental and two polarizing plates pumping light (6) for outputting a first concave mirror (10) and a blue-violet light frequency second concave mirror (12) composed of the polarizing plate (6) placed between the corresponding coupling lens group and the alkali metal vapor reservoir (7), which is placed high pump light transmitted through a light but highly reflective to the fundamental frequency, said frequency doubling crystal (11) placed between the first concave mirror (10) and a second concave mirror (12) of the fundamental frequency oscillation light beam waist; the pump light source LD pumped (I) emitted 所述传输光纤(2)输出至所述耦合透镜组,由耦合透镜组耦合聚焦进入所述碱金属蒸汽池(7)中,使碱金属原子产生有效的粒子数反转,在声光Q开关(9)的调制和Z型折叠腔的反馈作用下在腔内形成一定重复频率的基频振荡光,使位于基频振荡光束腰处的倍频晶体(11)产生非线性效应,形成蓝紫倍频光由第一凹面镜(10)输出。 The transmission fiber (2) to the group of the coupling lens, the coupling lens group focuses coupled into the alkali metal vapor reservoir (7), the alkali metal atom to produce effective inversion, acousto-optic Q-switch lower (9) and a feedback modulation Z-folded cavity of a certain repetition frequency of the fundamental frequency of the oscillation light in the cavity, so that doubling crystal (11) located at the beam waist fundamental frequency oscillation nonlinear effect, formed blue violet light output by the multiplier first concave mirror (10).
8.根据权利要求7所述的一种高重复频率蓝紫激光器,其特征在于,在所述碱金属蒸汽池(7)与声光Q开关(9)之间放置有光阑(8)。 According to claim repetition frequency of a high blue-violet laser of claim 7, wherein the diaphragm is placed (8) between the alkali metal vapor reservoir (7) and the acousto-optic Q-switch (9).
9.根据权利要求7所述的一种高重复频率蓝紫激光器,其特征在于,所述耦合透镜组主要由第一透镜(3)和第二透镜(4)组成,位于所述传输光纤(2)和偏振片(6)之间。 According to claim repetition frequency of a high blue-violet laser of claim 7, wherein the coupling lens group mainly composed of a first lens (3) and a second lens (4), is located on the transmission fiber ( 2) and a polarizer (6).
10.根据权利要求7所述的一种高重复频率蓝紫激光器,其特征在于,所述高反射镜(5)、第一凹面镜(10)和第二凹面镜(12)的表面镀有膜,所述高反射镜(5)表面镀有基频光波段的高反膜;所述第一凹面镜(10)表面镀有基频光波段的高反膜和倍频光波段的增透膜;所述第二凹面镜(12)表面镀有基频光和倍频光波段的高反膜。 According to claim repetition frequency of a high blue-violet laser of claim 7, wherein said highly reflective mirror (5), a first concave mirror (10) and a second concave surface (12) is plated with film, the highly reflective mirror (5) has a high anti-plated film optical band fundamental frequency; said first concave mirror (10) plated with a fundamental frequency light reflecting film and the high-band light frequency band AR film; a second concave mirror (12) plated with a highly reflective film baseband frequency doubled light wavelength band light.
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