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...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 10 th-order anti-Stokes to the 9 th-order Stokes was generated, and its spectral range covered377–846 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.展开更多
基金the National Natural Science Foundation of China(NSFC)(Nos.11475177 and 61505210)the Key Laboratory Innovation Foundation(No.KLCL-2018-N11).
文摘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 10 th-order anti-Stokes to the 9 th-order Stokes was generated, and its spectral range covered377–846 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.
