Open AccessDual-output fs/ps burst-mode laser for megahertz-rate rotational coherent anti-Stokes Raman scattering
Author(s) -
Michael E. Smyser,
Erik L. Braun,
Venkat Athmanathan,
Mikhail N. Slipchenko,
Sukesh Roy,
Terrence R. Meyer
Publication year - 2020
Publication title -
optics letters/optics index
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.524
H-Index - 272
eISSN - 1071-2763
pISSN - 0146-9592
DOI - 10.1364/ol.404984
Subject(s) - laser , optics , raman scattering , femtosecond , picosecond , scattering , materials science , physics , raman spectroscopy
A burst-mode laser system is developed for hybrid femtosecond/picosecond (fs/ps) rotational coherent anti-Stokes Raman scattering (RCARS) at megahertz rates. Using a common fs oscillator, the system simultaneously generates time synchronized 1061 nm, 274 fs and 1064 nm, 15.5 ps pulses with peak powers of 350 MW and 2.5 MW, respectively. The system is demonstrated for two-beam fs/ps RCARS in N 2 at 1 MHz with a signal-to-noise ratio of 176 at room temperature. This repetition rate is an order of magnitude higher than previous CARS using burst-mode ps laser systems and two to three orders of magnitude faster than previous continuously pulsed fs or fs/ps laser systems.