光学
材料科学
拉曼光谱
二极管
激光器
联轴节(管道)
功率(物理)
拉曼散射
可调谐激光吸收光谱技术
简单(哲学)
可调谐激光器
光电子学
物理
哲学
认识论
量子力学
冶金
作者
Heng Ge,Weijin Kong,Rui Wang,Gang Zhao,Weiguang Ma,Weigen Chen,Fu Wan
出处
期刊:Optics Letters
[The Optical Society]
日期:2023-04-14
卷期号:48 (8): 2186-2186
被引量:27
摘要
We report a novel, to the best of our knowledge, and simple technique to lock a 642 nm multi-quantum well diode laser to an external linear power buildup cavity by directly feeding the cavity reflected light back to the diode laser for enhancement of gas Raman signals. The dominance of the resonant light field in the locking process is achieved by reducing the reflectivity of the cavity input mirror and thus making the intensity of the directly reflected light weaker than that of the resonant light. Compared with traditional techniques, stable power buildup in the fundamental transverse mode TEM 00 is guaranteed without any additional optical elements or complex optical arrangements. An intracavity exciting light of 160 W is generated with a 40 mW diode laser. Using a backward Raman light collection geometry, detection limits at the ppm level are achieved for ambient gases (N 2 , O 2 ) with an exposure time of 60 s.
科研通智能强力驱动
Strongly Powered by AbleSci AI