Abstract

A novel, to the best of our knowledge, method for multipoint hybrid femtosecond/picosecond rotational coherent anti-Stokes Raman scattering measurements is presented. The pump/Stokes and probe beams are each split into 16 discrete points with 90 and 24 µJ/pulse, respectively, using simple diffractive optical elements, which are used in combination with a focusing lens and narrowband spectral amplifier for 1 kHz excitation along a linear array of probe volumes. Single-shot and averaged temperature and O₂/N₂ profile measurements are demonstrated along a line with 1 mm spacing in room temperature and heated N₂ flows. This enables measurements over varying spatial extents for 1D profiles and potentially 2D grids in a simple and compact optical arrangement.

© 2022 Optica Publishing Group

Pressure measurements using hybrid femtosecond/picosecond rotational coherent anti-Stokes Raman scattering

Sean P. Kearney and Paul M. Danehy
Opt. Lett. 40(17) 4082-4085 (2015)

Spatially and spectrally resolved multipoint coherent anti-Stokes Raman scattering from N₂ and O₂ flows

Judith B. Snow, Jia-biao Zheng, and Richard K. Chang
Opt. Lett. 8(12) 599-601 (1983)

Dual-pump vibrational/rotational femtosecond/picosecond coherent anti-Stokes Raman scattering temperature and species measurements

Chloe E. Dedic, Joseph D. Miller, and Terrence R. Meyer
Opt. Lett. 39(23) 6608-6611 (2014)

Hybrid fs/ps vibrational coherent anti-Stokes Raman scattering for simultaneous gas-phase N₂/O₂/CO₂ measurements

Huijie Zhao, Ziyang Tian, Yan Li, and Haoyun Wei
Opt. Lett. 46(7) 1688-1691 (2021)

High-energy, low-jitter, narrowband ps probe laser for kHz-rate fs/ps coherent anti-Stokes Raman scattering

Erik L. Braun, Karna Patel, Venkat Athmanathan, Terrence R. Meyer, Sukesh Roy, and Mikhail N. Slipchenko
Opt. Lett. 49(8) 2161-2164 (2024)