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2μm波长可调谐掺铥连续光纤激光器具有调谐范围宽、输出线宽窄和噪声低等特点,在激光雷达、遥感、光通信、光谱分析、环境监测及激光医疗等领域具有重要应用,近年来成为光纤激光技术领域的研究热点。文章首先介绍了可调谐光纤激光器中实现波长选择的各类光栅元件的基本结构及工作原理,涉及到的光栅元件主要包括闪耀光栅、体布拉格光栅和光纤光栅;其次重点阐述了基于光栅的可调谐掺铥连续光纤激光器在国内外的研究进展,最后对其未来的发展趋势做出展望。
Tunable 铥 continuous fiber laser with 2μm wavelength has the advantages of wide tuning range, narrow output linewidth and low noise. It has important applications in laser radar, remote sensing, optical communication, spectrum analysis, environmental monitoring and laser medical treatment. In recent years, Laser technology research hot spots. Firstly, the basic structure and working principle of various types of grating elements for wavelength selection in tunable fiber lasers are introduced. The grating elements involved mainly include blazed grating, volumetric Bragg grating and fiber grating; secondly, grating-based tunable Doped 铥 continuous fiber laser at home and abroad research progress, and finally make its future development trend.