共查询到19条相似文献,搜索用时 109 毫秒
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本文提出和实验论证了两种用简并的四波混频补偿激光放大器相位畸变的方案.在第一种方案中,混频介质饱和吸收体BDN染料二氯乙烷液体置于激光振荡器腔外,用偏振隔离技术,相位补偿的激光辐射从Nd:YAG激光振荡放大系统中耦合出来.实验得到了放大约四倍的后向波输出.在第二种方案中,相位共轭镜置于激光振荡器腔内,BDN染料溶液既作为简并的四波混频介质,又作为调Q介质,获得了补偿放大器相位畸变的调Q激光输出、研究了相位补偿特性.测量了激光输出与染料溶液浓度的关系. 相似文献
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将石英光纤浸入低折射率的激光染料溶液中构成圆柱形微腔.采用沿光纤轴向光抽运的消逝波激励增益方式,获得了沿光纤轴向长距离的激光染料增益,受激辐射光在圆柱形微腔中回音壁模式的支持下形成激光振荡.在直径为288 μm的同一根光纤外分三段分别填入罗丹明6G、罗丹明610和罗丹明640激光染料乙二醇溶液,实现了波长分别在567~575 nm、605~614 nm和656~666 nm三个不同波段的回音壁模式激光振荡,用一根光纤同时获得了红、橙、黄三种不同颜色的激光辐射.对实验所获得的回音壁模式激光光谱做了模式标定,依据标定的模式数计算了各种模式以及抽运光在光纤截面的强度分布.计算结果表明,激光增益区域总是局限在圆柱形微腔回音壁模式的模场区域内,由此可以显著地提高抽运效率,增加抽运光沿光纤轴向的增益长度. 相似文献
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研制了一种顶角可变的液体棱镜,并且应用在染料激光器中,能使两种波长激光实现同时受激振荡。当将液体棱镜置于染料激光器谐振腔内某一光路上时,通过调节此棱镜顶角,就能使一种波长的调谐不依赖于另一种波长。 相似文献
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采用高效激光染料PM580作为掺杂物质,聚甲基丙烯酸甲酯(PMMA)作为基质,在对固体染料光谱特性研究的基础上,重点研究了调Q倍频Nd:YAG抽运下不同染料掺杂浓度的固体染料激光输出特性.研究结果表明掺杂浓度对输出激光波长影响明显,随着掺杂浓度的增加,激光输出波长红移,从激光增益出发,对该现象给出了理论解释.掺杂浓度对激光转化效率也有影响,当掺杂浓度为2×10-4mol/L时,获得染料激光输出斜率效率最高达53.8%,抽运能量410mJ时,获得染料激光输出220mJ,激光带宽~8nm
关键词:
固体染料
宽带染料激光
PM580
聚甲基丙烯酸甲酯 相似文献
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根据速率方程,研究了二镜腔Nd:YAG双波长调Q激光的振荡机理.通过分析不同透过率下的竞争过程,研究了双波长激光振荡的特点.研究结果表明,在调Q过程中1319nm激光的调Q脉冲起振时间滞后于1064nm激光,并且其最终调Q脉冲来自调Q之后的第一个弛豫振荡尖峰,是该弛豫振荡抑制掉其他弛豫振荡后的结果.通过振荡机理分析,得到了双波长脉冲输出能量相当的透过率条件.
关键词:
双波长
调Q激光
速率方程
弛豫振荡 相似文献
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将石英光纤浸入低折射率的染料溶液中后构成圆柱形微腔.采用轴向光抽运消逝波激励激光增益的方式,使增益区域局限在圆柱形微腔回音壁模式的模场区域内,由此显著地提高了抽运效率,增加了沿光纤轴向的增益长度.在一根石英光纤的轴向分段填入浓度同为2×10-3mol/L的罗丹明6G和罗丹明B乙醇溶液,在567—576nm 和592—600nm的两个波长范围内同时获得回音壁模式的激光辐射;分段填入浓度为8×10-4和8×10-3mol/L的罗丹明B乙醇溶液,
关键词:
消逝波激励
圆柱形微腔
回音壁模式
双波段激光辐射 相似文献
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Direct Generation of Tunable UV Picosecond Laser Pulses Using Spectrotemporal Selection 总被引:1,自引:1,他引:0
Nguyen Dai Hung) Yusaburo Segawa 《Chinese Journal of Lasers》1997,6(3):198-206
DirectGenerationofTunableUVPicosecondLaserPulsesUsingSpectrotemporalSelectionNguyenDaiHung1)YusaburoSegawa(PhotodynamicResea... 相似文献
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A simple xenon ion laser that is either sealed or has a gas flow mode is described. The laser delivered long pulses ( 15 μs) of almost 1 kW peak power. It has been used to pump a dye laser employing the same configuration as cw dye lasers. The system is inexpensive and can be mode-locked, enabling it to yield ultrashort pulses comparable in duration to those delivered by cw argon laser-pumped dye lasers but with much higher peak powers. 相似文献
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A highly energetic flashlamp-pumped dye laser of 110 J output energy and overall efficiency of 1.1% is developed. For such a powerful laser particular considerations must be taken in order to reduce thermal distortion in the dye solution caused by high-energy pumping. The laser system is therefore composed of a laser head with a four-fold elliptical cylindrical reflector, extended Marx-bank driver circuit, a large aperture dye cell of 44 mm inner diameter and an unstable resonator.This paper is based on a presentation given at the 17th International Laser Radar Conference held in Sendai International Center, Japan, from 25–29 July 1994. 相似文献
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Spectrally Adjustable Picosecond Dye Laser Pulses Generated with Nanosecond Nitrogen Lasers 总被引:2,自引:0,他引:2
Nguyen Dai Hung Pham Long Dinh Van Trung Nguyen Van Tien Le Hoang Hai Nguyen Ha 《Chinese Journal of Lasers》1995,4(5):385-392
SpectrallyAdjustablePicosecondDyeLaserPulsesGeneratedwithNanosecondNitrogenLasersNguyenDaiHung;PhamLong;DinhVanTrung;NguyenVa... 相似文献
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O. Prakash J. Kumar R. Mahakud P. Saxena V.K. Dubey S.K. Dixit J.K. Mittal 《Optics & Laser Technology》2011,43(8):1475-1481
This paper presents the effect of the flow of the dye gain medium on the wavelength jitter (<30 s) and drift (≈10 min) of a single axial mode dye laser pumped by a copper vapor laser (5.5 kHz). The study was carried out using a wave-meter. The dye solution temperature was maintained to within ±0.1 °C to allow the influence of dye flow rate on the wavelength stability. For the investigated dye flow rate, varying from 1.4 to 2.8 lpm (with corresponding Reynolds number varying from 1975 to 3950), the dye laser wavelength jitter reduced from ±0.15 pm (±130 MHz) to ±0.08 pm (±70 MHz) and drift rate reduced from 1.0 to 0. 2 MHz/s. However for flows beyond 1.7 lpm, random fluctuations in dye laser wavelength were observed. The observed behavior was linked to the flow related variation of angular spread and angular drift of the dye laser beam circulating in the cavity. This was revealed by an exhaustive study of the long term (≈10 min) divergence and pointing stability of the single mode dye laser output beams for different dye media flows. 相似文献
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本文介绍一种新合成的化合物IBOP.经在多种染料激光器上测试表明,其激光转换效率高,光化学稳定性好,能溶于多种溶剂.性能优于DPS等相同波段的常用激光染料.IBOP在各种溶剂中的激光调谐范围为388~428nm,激光峰值波长在400nm左右.本文给出了IBOP的荧光光谱、吸收光谱、激光特性、溶剂效应和浓度效应等数据,并作了讨论. 相似文献