WO2020118864A1 - 一种皮秒太瓦co2激光放大器泵浦装置 - Google Patents

一种皮秒太瓦co2激光放大器泵浦装置 Download PDF

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WO2020118864A1
WO2020118864A1 PCT/CN2019/072301 CN2019072301W WO2020118864A1 WO 2020118864 A1 WO2020118864 A1 WO 2020118864A1 CN 2019072301 W CN2019072301 W CN 2019072301W WO 2020118864 A1 WO2020118864 A1 WO 2020118864A1
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laser
pump
pumping
module
electric
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French (fr)
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唐霞辉
宋宇燕
夏燃
肖瑜
秦应雄
胡聪
李想
陈汉元
龙思琛
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Huazhong University of Science and Technology
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Huazhong University of Science and Technology
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/09—Processes or apparatus for excitation, e.g. pumping
    • H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
    • H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
    • H01S3/0941—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a laser diode
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/09—Processes or apparatus for excitation, e.g. pumping
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • H01S3/10007—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers
    • H01S3/10023—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers by functional association of additional optical elements, e.g. filters, gratings, reflectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/14—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range characterised by the material used as the active medium
    • H01S3/22—Gases
    • H01S3/223—Gases the active gas being polyatomic, i.e. containing two or more atoms
    • H01S3/2232—Carbon dioxide (CO2) or monoxide [CO]

Definitions

  • the invention relates to the technical field of optics, in particular to a picosecond terawatt CO 2 laser amplifier pumping device.
  • Multi-stage amplification of ultrashort laser pulses requires a continuous smooth gain spectrum, and its bandwidth needs to be wider than the input pulse spectrum that is restricted by Fourier transform.
  • the CO 2 molecular gain line is discontinuous.
  • the CO 2 molecule gain spectrum is composed of a series of discrete narrow-band lines, each of which corresponds to a molecular rotational energy level transition. Only when the discharge gas pressure is as high as 25 atm, due to the collision widening effect, the gain spectrum of the conventional band 10P branch (10.6 ⁇ m band) of the CO 2 molecule is nearly continuous, and the gain bandwidth is about 1.2 THz.
  • the input pulse of the pre-stage regenerative amplification is generally of the order of ps-nJ or ps- ⁇ J.
  • this application provides a picosecond terawatt CO 2 laser amplifier pumping device, which aims to solve the problems of CO 2 molecular gain spectrum discretization and narrow linewidth.
  • the present invention provides a picosecond terawatt CO 2 laser amplifier pumping device, including a laser pumping module, an electric pumping module and a laser resonator; the axis of the laser pumping module and the electric pumping module The electric field direction and the axis of the laser resonator are orthogonal to each other and intersect at the center of the laser resonator; the laser pump module is used to pump CO 2 molecule 00 0 3 sequence band; the electric pump module is used to pump CO 2 molecule 00 0 1 conventional band; the laser resonant cavity is pumped by the laser pump module and the electric pump module at the same time, and the mixed gain spectral lines are widened by the overlapping of the spectral lines, which is used to realize the laser output.
  • the laser pumping module includes a semiconductor-pumped solid-state laser and a collimator arranged coaxially in sequence, and the collimator is used to collimate the pumping light generated by the semiconductor-pumped solid-state laser.
  • the semiconductor pump solid-state laser outputs pump laser, collimates the pump light through a collimator, enters the laser resonator through the pump light input window, and reflects back and forth in the laser resonator to form
  • the direction of the pump laser oscillation makes the CO 2 molecule transition to the 00 0 3 energy level, which improves the pumping efficiency.
  • the invention can utilize the cross-overlapping characteristics of the sequence band gain spectrum line and the conventional band gain to encrypt the gain spectrum and improve the CO 2 molecular sequence band gain.
  • the solid-state gain medium of the semiconductor pumped solid-state laser is Cr 4+ :YAG.
  • the pump source of the semiconductor pumped solid-state laser is a semiconductor laser, a high-efficiency Yb fiber laser, or an Nd:YAG laser.
  • the electric pump module includes a cathode and an anode, and a high-voltage discharge is applied between the cathode and the anode.
  • the laser resonant cavity includes a pump cylindrical condensing cavity, three pump laser mirrors, a CO 2 laser back mirror and a CO 2 laser output mirror; a pump cylindrical condensing cavity and a condensing cavity provided in the pump cylinder
  • the three pump laser mirrors at the three corners are used to build a pump laser back and forth reflection path, the CO 2 laser rear mirror is used to reflect the CO 2 laser, and the CO 2 laser output mirror is used to output the CO 2 laser.
  • the present invention proposes a picosecond terawatt CO 2 laser amplifier based on an electro-optic hybrid pumping sequence band gain.
  • sequence band gain spectrum line and the conventional band gain spectrum line are used
  • the characteristic of cross-overlap encrypts the gain spectrum, which broadens the mixed gain spectrum and realizes the continuous spectrum picosecond CO 2 pulse amplification;
  • the picosecond terawatt CO 2 laser amplifier proposed by the present invention utilizes the characteristic of overlapping and overlapping of the sequence band gain spectrum line and the conventional band gain spectrum line to alleviate the phenomenon of spectral splitting after the pulse passes, and avoid the distribution of laser energy to the input
  • the single pulse is split into a series of discrete ps pulses, which causes the energy of the single ps pulse to be too low, which improves the amplification efficiency of the ultra-short pulse.
  • FIG. 1 is a schematic structural diagram of a CO 2 laser amplifier pumping device provided by the present invention.
  • FIG. 2(a) is a schematic diagram of spectral lines of the CO 2 molecule 00 0 3 sequence band and 00 0 1 conventional band of the CO 2 laser amplifier pumping device provided by the present invention
  • 2(b) is a schematic diagram of the crossover overlap of the CO 2 molecule 00 0 3 sequence band and the 00 0 1 conventional band gain spectrum in the 10.6 ⁇ m region of the CO 2 laser amplifier pumping device provided by the present invention
  • FIG. 3 is a schematic structural diagram of a CO 2 laser amplifier provided by an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a laser resonator of a CO 2 laser amplifier according to an embodiment of the present invention
  • 1 solid laser working substance crystal
  • 2 is semiconductor pump
  • 3 is 1.47 ⁇ m semiconductor pump solid laser
  • 4 is collimator
  • 5 is pump light input window
  • 6 is CO 2 laser back reflector
  • 7 It is the gas discharge observation window
  • 8 is the deflector
  • 9 is the main heat exchanger
  • 10 is the cathode
  • 11 is the CO 2 laser output mirror
  • 12 is the pump cylindrical condensing cavity
  • 13 is the anode
  • 14 is the light bridge
  • 15 is the auxiliary heat exchanger
  • 16 is the fan
  • 17 is the power supply input
  • 18 is the high-voltage transformer
  • 19 is the high-voltage rectifier
  • 20 is the inflatable part
  • 21 is the vacuum system
  • 22 is the 1.47 ⁇ m pump laser
  • 23 is the laser CO 2 In the direction of gas flow
  • 24 is the CO 2 gas flow guide plate
  • 25 is the pump laser mirror
  • 26 is the laser output direction
  • 27 is the pump laser oscillation direction
  • 28 is the laser CO 2 gas discharge
  • the invention provides a picosecond terawatt CO 2 laser amplifier pumping device, which includes a laser pumping module, a laser resonator and an electric pumping module; the axis of the laser pumping module, the electric field direction of the electric pumping module and the laser resonance
  • the three axes of the cavity are orthogonal to each other and intersect the center of the laser cavity; the laser pump module is used to pump CO 2 molecule 00 0 3 sequence band; the electric pump module is used to pump CO 2 molecule 00 0 1 conventional band
  • the laser resonant cavity is pumped by the laser pump module and the electric pump module at the same time, and the mixed gain spectral line is broadened by the overlapping of the spectral lines, which is used to realize the laser output.
  • the laser pumping module includes a semiconductor pump solid-state laser 3 and a collimator 4 coaxially arranged in sequence, and the collimator 4 is used to collimate the pump light generated by the semiconductor pump solid-state laser 3 .
  • the transition from the ground state 00 0 0 to the sequence band 00 0 3 in the absorption spectrum of the CO 2 molecule has a strong absorption line, which corresponds to an optical wavelength of about 1.47 ⁇ m, so a 1.47 ⁇ m semiconductor is used
  • the pumped solid-state laser 3 performs pumping.
  • Cr 4+ YAG used in solid high-efficiency gain medium is an ideal high-efficiency gain medium working at near infrared wavelengths.
  • the Nd: YAG used in the pump source has the advantages of small size and high efficiency.
  • the electric pump module includes a cathode 10 and an anode 13, a high voltage is applied between the cathode 10 and the anode 13, and the cathode 10 and the anode 13 are discharged in the laser CO 2 gas discharge region 28.
  • the laser resonator includes a pump cylindrical condensing cavity 12, three pump laser mirrors 25, a CO 2 laser rear mirror 6 and a CO 2 laser output mirror 11; a pump cylindrical condensing cavity 12 and a pump are provided Three pump laser mirrors 25 at the three corners of the cylindrical condensing cavity 12 are used to build the pump laser light back and forth to limit the pump light to the laser cavity, and the CO 2 laser rear mirror 6 is used for reflection
  • the CO 2 laser forms the pump laser oscillation direction 27, and the CO 2 laser output mirror 11 is used to output the CO 2 laser.
  • the semiconductor pump solid-state laser 3 outputs the pump laser, collimates the pump light through the collimator 4, enters the laser resonator through the pump light input window, and pumps the laser mirror 25
  • the pump laser cylindrical cavity 12 restricts the pump light to reflect back and forth in the laser cavity, forming the direction of the pump laser oscillation, so that the CO 2 molecule transitions to the 00 0 3 energy level, and a sequence band gain spectrum is obtained.
  • the mixed gas is input into the laser resonator through the gas filling part 20, the electric control part controls the fan 16 to circulate the gas, the high voltage transformer 18 and the high voltage rectifier 19 provide high voltage for the cathode 10 and the anode 13, and the laser CO 2 laser passes through the cathode 10 and the anode 13
  • the discharge zone 28 discharges, causing the CO 2 molecule to transition to the 00 0 1 level, and a conventional band gain spectrum is obtained.
  • a high-efficiency pulsed electro-optically pumped continuous spectrum CO 2 laser amplifier was constructed to obtain a 3 ps pulse width and a 10 mJ-level single-pulse CO 2 laser output under 3 ps and 1 nJ seed light input conditions. Amplification of power amplifier provides an ideal seed source.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Optics & Photonics (AREA)
  • Lasers (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)

Abstract

一种皮秒太瓦CO 2激光放大器泵浦装置，包括激光泵浦模块、电泵浦模块和激光谐振腔；激光泵浦模块的轴线、电泵浦模块的电场方向和激光谐振腔的轴线三者彼此正交；激光泵浦模块用于泵浦CO 2分子00 03序列带；电泵浦模块用于泵浦CO 2分子00 01常规带；激光谐振腔用于实现激光输出。皮秒太瓦CO2激光放大器泵浦装置，通过在放电激励的同时进行光泵浦，利用序列带增益谱线与常规带增益谱线交叉重叠的特性加密增益谱，使得混合增益谱线展宽，实现连续谱皮秒CO 2脉冲放大。并且减缓脉冲经过后的频谱分裂现象，避免激光能量能分配到输入的单脉冲被调制后分裂为一系列分立的的ps脉冲上去导致单个ps脉冲的能量过低，提高超短脉冲的放大效率。

Description

一种皮秒太瓦CO 2激光放大器泵浦装置 [技术领域]
本发明涉及光学技术领域，尤其涉及一种皮秒太瓦CO 2激光放大器泵浦装置。
[背景技术]
近年来，由于激光等离子加速(LPA)应用对中红外超短超强激光驱动器的需求牵引，CO 2超短脉冲放大器的研究有了很大突破。在激光脉冲与等离子体相互作用过程中，由于强激光脉冲传递给带电粒子的能量正比于Iλ 2(I为光强，λ为波长)，长波长红外激光与短波长的固体激光相比有着非常大的优势。要获得波长在10μm附近中红外波段的高增益、高能量的激光输出，CO 2激光是目前唯一的选择。由于激光等离子体加速等需求，超短超强CO 2激光系统极有可能成为下一代LPA产生高能质子(离子)、电子束的主力光源，皮秒太瓦CO 2激光放大器加快发展。
超短激光脉冲的多级放大需要一个连续平滑增益谱，其带宽需要比傅里叶变换受限的输入脉冲的频谱更宽。然而，CO 2分子增益谱线是不连续的，CO 2分子的增益谱是由一系列分立的窄带的谱线组成，每根谱线对应于一个分子转动能级跃迁。只有当放电气压高达25atm时，由于碰撞加宽的作用，CO 2分子的常规带10P支(10.6μm带)的增益谱才接近连续，增益的带宽约为1.2THz。前级再生放大输入脉冲一般为ps-nJ或ps-μJ量级，这种强度脉冲光束的电场引起谱线的场致加宽(交流Stark效应)不足以使得在整个增益带上实现一个连续谱线。由于CO 2分子增益谱特性，输入再生放大器的单脉冲会分裂为一系列分立的脉冲，影响下一级放大器。受限于CO 2分子的增益谱线窄带宽、离散化的特性，在高增益带宽介质中广泛应用的啁啾放大技术(CPA)很难在CO 2激光器中实现。要解决离散周期谱线的调制问题，主要通过两个途径：采用同位素增加谱线密度和高气压使单个转动能级的谱线加 宽。然而，高纯同位素非常昂贵，精确控制同位素分子的浓度也相当困难。TEA(Transversly Excited Atmospheric，横向激励大气压)放电系统的实际工作电压远远小于25atm，此时CO 2分子的增益谱表现出离散的分离特性。一个超短脉冲通过增益谱为离散或者离散的放大器后，超短脉冲中只有部分频率分量被放大，而有一部分频率分量得不到有效放大，在时域的表现为输入的单个脉动受到谱线间隔决定的固有频率的调制而分裂为一系列固定时间间隔的脉冲。当放电气压提高到25atm时，增益谱为近似连续，可是，在如此高的气压条件下很难获得稳定的大体积辉光放电。15atm稳定辉光放电已经接近目前放电技术条件的极限，且放电区体积很小。因此，想要通过提高放电气压来实现连续谱CO 2放大也非常困难。
[发明内容]
针对现有技术的以上缺陷或改进需求，本申请提供了一种皮秒太瓦CO 2激光放大器泵浦装置，旨在解决CO 2分子增益谱离散化与窄线宽的问题。
为实现上述目的，本发明提供了一种皮秒太瓦CO 2激光放大器泵浦装置，包括激光泵浦模块、电泵浦模块和激光谐振腔；激光泵浦模块的轴线、电泵浦模块的电场方向和激光谐振腔的轴线三者彼此正交且相交于激光谐振腔的中心；激光泵浦模块用于泵浦CO 2分子00 03序列带；电泵浦模块用于泵浦CO 2分子00 01常规带；激光谐振腔通过激光泵浦模块和电泵浦模块同时泵浦的方法，利用谱线交叉重叠使得混合增益谱线展宽，用于实现激光输出。
激光泵浦模块包括依次同轴设置的半导体泵浦固体激光器和准直器，准直器用于将所述半导体泵浦固体激光器产生的泵浦光准直。其中，在CO 2激光器运行状态下，半导体泵浦固体激光器输出泵浦激光，通过准直器将泵浦光准直，经过泵浦光输入窗口进入激光谐振腔，在激光谐振腔来回反射，形成泵浦激光振荡方向，使CO 2分子跃迁到00 03能级，提高泵浦效率。同时，通过阴极和阳极在激光CO 2激光放电区放电，使CO 2分子跃迁到00 01能级。本发明能够利用序列带增益谱线与常规带增益交叉重叠特性，加密增益谱， 提升CO 2分子序列带增益。
优选地，半导体泵浦固体激光器的固体增益介质为Cr 4+：YAG。
优选地，半导体泵浦固体激光器的泵浦源为半导体激光、高效Yb光纤激光或者Nd：YAG激光。
电泵浦模块包括阴极和阳极，在阴极和阳极之间加高压放电。
激光谐振腔包括泵浦柱面聚光腔、3个泵浦激光反射镜、CO 2激光后反射镜和CO 2激光输出镜；泵浦柱面聚光腔和设置于泵浦柱面聚光腔的三个角的3个泵浦激光反射镜用于搭建泵浦激光来回反射光路，CO 2激光后反射镜用于反射CO 2激光，CO 2激光输出镜用于输出CO 2激光。
本发明的有益效果在于：
(1)本发明提出了一种基于电光混合泵浦序列带增益的皮秒太瓦CO 2激光放大器，通过在放电激励的同时进行光泵浦，利用序列带增益谱线与常规带增益谱线交叉重叠的特性加密增益谱，使得混合增益谱线展宽，实现连续谱皮秒CO 2脉冲放大；
(2)本发明提出的皮秒太瓦CO 2激光放大器，利用序列带增益谱线与常规带增益谱线交叉重叠的特性，减缓脉冲经过后的频谱分裂现象，避免激光能量能分配到输入的单脉冲被调制后分裂为一系列分立的的ps脉冲上去导致单个ps脉冲的能量过低，提高超短脉冲的放大效率。
[附图说明]
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，还可以根据这些附图获得其他的附图。
图1为本发明提供的CO 2激光放大器泵浦装置的结构示意图；
图2(a)为本发明提供的CO 2激光放大器泵浦装置的CO 2分子00 03序列带与00 01常规带谱线示意图；
图2(b)为本发明提供的CO 2激光放大器泵浦装置的CO 2分子00 03序列带与00 01常规带增益谱在10.6μm区域的交叉重叠示意图；
图3为本发明实施例提供的CO 2激光放大器的结构示意图；
图4为本发明实施例提供的CO 2激光放大器的激光谐振腔的结构示意图；
图5(a)～(c)为本发明实施例提供的CO 2激光放大器泵浦装置的效果图。
其中，1为固体激光工作物质晶体，2为半导体泵浦，3为1.47μm半导体泵浦固体激光器，4为准直器，5为泵浦光输入窗口，6为CO 2激光后反射镜，7为气体放电观察窗，8为导流板，9为主热交换器，10为阴极，11为CO 2激光输出镜，12为泵浦柱面聚光腔，13为阳极，14为光桥，15为副热交换器，16为风机，17为供电输入端，18为高压变压器，19为高压整流器，20为充气部分，21为真空系统，22为1.47μm泵浦激光，23为激光CO 2气流方向，24为CO 2气流导向板，25为泵浦激光反射镜，26为激光输出方向，27为泵浦激光振荡方向，28为激光CO 2气体放电区。
[具体实施方式]
为使本申请实施例的目的、技术方案和优点更加清楚，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员所获得的所有其他实施例，都属于本申请保护的范围。
本发明提供了一种皮秒太瓦CO 2激光放大器泵浦装置，包括激光泵浦模块、激光谐振腔和电泵浦模块；激光泵浦模块的轴线、电泵浦模块的电场方向和激光谐振腔的轴线三者彼此正交且相交于激光谐振腔的中心；激光泵浦模块用于泵浦CO 2分子00 03序列带；电泵浦模块用于泵浦CO 2分子00 01常规带；激光谐振腔通过激光泵浦模块和电泵浦模块同时泵浦的方法，利用谱线交叉重叠使得混合增益谱线展宽，用于实现激光输出。
如图1所示，激光泵浦模块包括依次同轴设置的半导体泵浦固体激光器3和准直器4，准直器4用于将所述半导体泵浦固体激光器3产生的泵浦光准直。如图2所示，CO 2分子吸收谱中从基态00 00到序列带00 03的跃迁有一条较强的吸收线，该谱线对应的光波长约为1.47μm，因此采用1.47μm半导体泵浦固体激光器3进行泵浦。固体高效增益介质采用的Cr 4+：YAG是非常理想的近红外波长工作的高效增益介质，泵浦源采用的Nd：YAG具有体积小、效率高的优势。
电泵浦模块包括阴极10和阳极13，在阴极10和阳极13之间加高压，阴极10和阳极13在激光CO 2气体放电区28放电。
激光谐振腔包括泵浦柱面聚光腔12、3个泵浦激光反射镜25、CO 2激光后反射镜6和CO 2激光输出镜11；泵浦柱面聚光腔12和设置于泵浦柱面聚光腔12的三个角的3个泵浦激光反射镜25用于搭建泵浦激光来回反射光路，将泵浦光限制在激光谐振腔内，CO 2激光后反射镜6用于反射CO 2激光，形成泵浦激光振荡方向27，CO 2激光输出镜11用于输出CO 2激光。
其中，在CO 2激光器运行状态下，半导体泵浦固体激光器3输出泵浦激光，通过准直器4将泵浦光准直，经过泵浦光输入窗口进入激光谐振腔，泵浦激光反射镜25和泵浦激光柱面腔12将泵浦光限制在激光谐振腔内来回反射，形成泵浦激光振荡方向，使CO 2分子跃迁到00 03能级，得到序列带增益谱。同时，混合气体通过充气部分20输入激光谐振腔，电控部分控制风机16使气体循环，高压变压器18和高压整流器19为阴极10和阳极13提供高压，通过阴极10和阳极13在激光CO 2激光放电区28放电，使CO 2分子跃迁到00 01能级，得到常规带增益谱。本实施例构建了一个高效率的脉冲电光泵浦的连续谱CO 2激光放大器，以期在3ps、1nJ的种子光输入条件下，得到3ps脉宽及10mJ级单脉冲CO 2激光输出，为下一级功率放大器放大提供理想的种子源。
如图5所示，当使用电光混合泵浦时，我们看到混合增益谱线的展宽更 加明显，脉冲经过后的频谱分裂现象有所减缓，时域脉冲分裂减少，主峰的能量更大，与旁瓣的对比度越来越明显。
本领域的技术人员容易理解，以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。

Claims (6)

  1. 一种皮秒太瓦CO 2激光放大器泵浦装置，其特征在于，包括激光泵浦模块、电泵浦模块和激光谐振腔；
    所述激光泵浦模块的轴线、所述电泵浦模块的电场方向和所述激光谐振腔的轴线三者彼此正交且相交于所述激光谐振腔的中心；
    所述激光泵浦模块用于泵浦CO 2分子00 03序列带；所述电泵浦模块用于泵浦CO 2分子00 01常规带；所述激光谐振腔通过所述激光泵浦模块和所述电泵浦模块同时泵浦的方法，利用谱线交叉重叠使得混合增益谱线展宽，用于实现激光输出。
  2. 根据权利要求1所述的CO 2激光放大器泵浦装置，其特征在于，所述激光泵浦模块包括依次同轴设置的半导体泵浦固体激光器(3)和准直器(4)；
    所述准直器(4)用于将所述半导体泵浦固体激光器(3)产生的泵浦光准直。
  3. 根据权利要求1或2所述的CO 2激光放大器泵浦装置，其特征在于，所述半导体泵浦固体激光器(3)的固体激光工作物质晶体为Cr 4+：YAG。
  4. 根据权利要求1或2所述的CO 2激光放大器泵浦装置，其特征在于，所述半导体泵浦固体激光器(3)的泵浦源为半导体激光、高效Yb光纤激光或者Nd：YAG激光。
  5. 根据权利要求1所述的CO 2激光放大器泵浦装置，其特征在于，所述 电泵浦模块包括阴极(10)和阳极(13)，在所述的阴极(10)和阳极(13)之间加高压放电。
  6. 根据权利要求1所述的CO 2激光放大器泵浦装置，其特征在于，所述激光谐振腔包括泵浦柱面聚光腔(12)、3个泵浦激光反射镜(25)、CO 2激光后反射镜(6)和CO 2激光输出镜(11)；
    所述泵浦柱面聚光腔(12)和设置于所述泵浦柱面聚光腔(12)的三个角的所述3个泵浦激光反射镜(25)用于搭建泵浦激光来回反射光路，所述CO 2激光后反射镜(6)用于反射CO 2激光，所述CO 2激光输出镜(11)用于输出CO 2激光。
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