体布拉格光栅外腔实现激光二极管阵列同相模输出  

In-phase mode selection of high-power diode laser array by VBG external cavity

作　　者：张雪[1] 李强[1] 刘波[1] 马建军[1] 

机构地区：[1]北京工业大学激光工程研究院,北京100124

出　　处：《强激光与粒子束》2009年第12期1767-1770,共4页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(10276003);北京市自然科学基金重点项目(4051001)

摘　　要：采用体布拉格光栅作为商用二极管激光阵列外腔,通过将每个单元发出的光反馈回相邻单元实现了外腔锁相。采用这种方法对发光单元宽度为100μm、周期为200μm,由49个单元构成的二极管阵列进行了外腔锁相实验,在远场获得了高光束质量、窄带宽的稳定输出。二极管激光阵列自由运转下功率为15 W,经外腔锁相后输出功率为3.67 W,对应光束远场发散角1.47 mrad,光谱的峰值半宽由1.7 nm压窄到0.17 nm。Phase locking of a high-power DLA in-phase mode output with a volume Bragg grating as an external cavity mirror was achieved experimentally. The linear array consisted of 49 wide-aperture diodes with a diode width of 100 μm and a spacing period of 200 μm was phase locked. Improved output beam quality in the far-field and suppressed bandwidth were demonstrated. The DLA＇s single lobe output was 3.67 W for a free running paser of 15 W, the far-field divergence of the phase-locked beam was 1.47 mrad, and the spectral full width at half maximum of the output beam was suppressed from 1.7 nm to 0.17 nm.

关 键 词：二极管激光器 体布拉格光栅 锁相 同相模 

分 类 号：TN248[电子电信—物理电子学]