Chinese Optics Letters, 2020, 18 (5): 051402, Published Online: Apr. 22, 2020
Investigation of multispectral SF6 stimulated Raman scattering laser Download: 707次
multispectral Raman laser Raman frequency comb stimulated Raman scattering four wave mixing conversion efficiency
Abstract
In this work, SF6 as a Raman-active medium is investigated to generate a multispectral Raman laser by the combination of cascade stimulated Raman scattering (SRS) and four wave mixing. The Raman frequency comb from the 10th-order anti-Stokes to the 9th-order Stokes was generated, and its spectral range covered 377–846 nm. The photon conversion efficiency of 16.4% for the first Stokes was achieved, and the Raman gain coefficient at 1.5 MPa of SF6 under the 532 nm pump laser was calculated to be 0.83 cm/GW by the SRS threshold comparison with H2. Using helium as the carrier gas, the thermal effect of the SF6 Raman laser was improved dramatically under a repetition rate of 10 Hz.
Chencheng Shen, Xianglong Cai, Youbao Sang, Tiancheng Zheng, Zhonghui Li, Dong Liu, Wanfa Liu, Jingwei Guo. Investigation of multispectral SF6 stimulated Raman scattering laser[J]. Chinese Optics Letters, 2020, 18(5): 051402.