Highly efficient tunable picosecond deep ultraviolet laser system for Raman spectroscopy. Academic Article uri icon

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 ┬ÁJ 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 ${{
    m LiB}_3}{{
    m O}_5}$LiB3O5 (LBO) and ${{
    m BaB}_2}{{
    m O}_4}$BaB2O4 (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.

altmetric score

  • 0.25

author list (cited authors)

  • Shutov, A. D., Petrov, G. V., Wang, D., Scully, M. O., & Yakovlev, V. V.

citation count

  • 8

publication date

  • November 2019