基于拉曼晶体的多波长激光技术研究进展

Research progress of multi-wavelength laser technology based on Raman crystal

利用受激拉曼散射效应,以拉曼晶体作为介质,可产生同轴输出的多波长激光信号,该种激光器具有结构紧凑、脉冲能量高和波长可调谐等特点,在全色激光成像与显示、光电对抗等领域有着重要的应用前景。本文介绍了受激拉曼散射基本原理和常用拉曼激光器结构,研究了国内外基于拉曼晶体的多波长激光技术的研究进展,总结了利用受激拉曼散射产生多波长激光存在的不足。针对目前受激拉曼散射高阶散射光较难生成,生成的多波长激光信号覆盖谱段较窄,输出功率较低,调谐方式单一等问题,提出了今后多波长激光技术发展方向。

According to stimulated Raman scattering effect,multi-wavelength laser signal of coaxial output can be producedby using Raman crystal as medium. This kind of laser has the characteristics of compact structure, high pulseenergy, tunable wavelength, etc, so it has important applications in full-color laser imaging and displaying,electro-opticcountermeasure. The basic principle of stimulated Raman scattering and general Raman laser structure were introduced.The domestic and overseas research progress of multi-wavelength laser based on Raman crystal was presented,and the deficiencies that the stimulated Raman scattering is used to generate multi-wavelength laser were summarized.For the problems that the high-order scattering light is difficult to generate, multi-wavelength laser signal coversa narrow spectrum,the output power is low,the tuning mode is single,the development directions of multi-wavelengthlaser technology are proposed.