排序方式: 共有17条查询结果,搜索用时 15 毫秒
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用于光生毫米波的双频激光放大特性 总被引:1,自引:0,他引:1
采用激光二极管端面抽运的双纵模Nd∶YVO4微片激光器作为种子光源,双端面抽运的Nd∶YVO4行波放大器作为功率放大器,获得了大频差、高功率双频激光信号输出。分析了放大过程中光谱匹配对双频激光输出特性的影响。结果表明,随种子光入射功率从小到大变化,放大倍率呈起伏减小的趋势;受到放大器增益带宽的限制,放大后双频激光频差小于种子光频差。当种子源和放大器的抽运电流分别为14.5A和40.0A时,最终获得了功率为2.38 W,频差为47.7GHz的双频激光信号输出。 相似文献
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固体激光器在强抽运的条件下,激光晶体热透镜的球差效应是不容忽视的,尤其是在大基模体积的动态稳定腔中,会影响谐振腔的振荡模式,进而影响腔内损耗和输出功率.通过Fox-Li的衍射迭代算法,分析了谐振腔的自再现模,表明在热透镜球差效应作用下,基模的光强分布出现了旁瓣,并由此带来了光束质量的下降,最后通过实验结果验证了理论分析,指出光束填充因子是激光器设计的一个重要因素,其最佳值需要根据球差效应的强弱,通过实验的方法来确定.
关键词:
热透镜
球差效应
谐振腔模式 相似文献
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Achieving single-lobed far-field patterns of broad area laser diode with external cavity feedback 总被引:4,自引:0,他引:4
We demonstrate a technique for single transverse mode operation of high-power broad area laser diode (BAL). In the experiment, the HR mirror is used as an external cavity mirror and the grating is used as a wavelength selective component. By tiling the HR mirror and the grating, the number of transverse modes oscillating in the cavity can be limited and the spectral bandwidth of the laser diode can be reduced. A single-lobed near diffraction-limited laser beam with the beam divergence (FWHM) of 0.43°, the spectral line-width of 0.7 nm and the output power of 350 mW are obtained. With the feedback, the power density of the output laser beam is increased 6 times in comparison with the free running. 相似文献
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Influence of spherical aberrations on fundamental mode beam quality under different laser resonators 下载免费PDF全文
Spherical aberrations of the thermal lens of the active media are severe
when solid state lasers are strongly pumped. The fundamental mode
profile deteriorates due to the aberrations. Self-consistent
modes of a resonator with aberrations are calculated by using the
Fox--Li diffraction iterative algorithm. Calculation results show
that the aberration induced fundamental mode beam quality
deterioration depends greatly on the resonator design. The tolerance
of a flat--flat resonator to the aberration coefficient is about
30λ in the middle of stability, where λ is the
wavelength of laser beam. But for a dynamically stable resonator,
2λ of spherical aberration will create diffraction loss of
more than 40%, if inappropriate design criteria are used. A
birefringence compensated laser resonator with two Nd:YAG rods is
experimentally studied. The experimental data are in quite good
agreement with simulation results. 相似文献