Abstract
We present a narrowband laser system tunable from 219 to 236 nm for deep ultraviolet (DUV) Raman spectroscopy. The demonstrated laser system produces 6.7 ps nearly transform-limited pulses with energy up to 0.36 µJ at 100 kHz repetition rate. The system consists of a two-stage optical parametric amplifier (OPA) of a narrowband continuous wave diode laser and subsequent frequency conversion to the DUV radiation. We achieve more than 300 mW in the signal wave using ${{\rm LiB}_3}{{\rm O}_5}$ (LBO) and ${{\rm BaB}_2}{{\rm O}_4}$ (BBO) crystals, with the total 2.7 W pump after the two-stage OPA. We reach 12% conversion efficiency of the OPA signal wave into the DUV radiation using type-I phase matching in the BBO crystal. Finally, we demonstrate the applicability of the system for DUV Raman spectroscopy by collecting a high dynamic range, high spectral resolution spontaneous Raman spectrum of air.
© 2019 Optical Society of America
Full Article | PDF ArticleMore Like This
Hengjun Chen, Hiyori Uehara, and Ryo Yasuhara
Opt. Lett. 45(19) 5558-5561 (2020)
Chun-Lin Chang, Peter Krogen, Houkun Liang, Gregory J. Stein, Jeffrey Moses, Chien-Jen Lai, Jonathas P. Siqueira, Luis E. Zapata, Franz. X. Kärtner, and Kyung-Han Hong
Opt. Lett. 40(4) 665-668 (2015)
N. Ruhnke, A. Müller, B. Eppich, R. Güther, M. Maiwald, B. Sumpf, G. Erbert, and G. Tränkle
Opt. Lett. 40(9) 2127-2129 (2015)