Abstract

The sensitivity of high-repetition-rate hybrid femtosecond/picosecond (fs/ps) rotational coherent anti-Stokes Raman scattering (RCARS) is strongly influenced by the energy available for the ps probe pulse. In this work, a high-energy ps probe pulse that is time-synchronized with the fs pump/Stokes pulse is achieved by using a diode-pumped Nd:YAG amplifier seeded at 1064.4 nm by the output of a fs optical parametric amplifier. Nearly transform-limited, 10 ps pulses with up to 800 µJ/pulse and a bandwidth of ${1.9}\;{{\rm cm}^{ - 1}}$ were generated at the second harmonic 532.2 nm and used for kilohertz-rate fs/ps RCARS thermometry up to 2400 K with accuracies of 1–2%. We furthermore demonstrate the amplification of variable pulsewidths for flexible single-mode (chirp-free) RCARS signal generation.

© 2020 Optical Society of America

Dual-output fs/ps burst-mode laser for megahertz-rate rotational coherent anti-Stokes Raman scattering

Michael E. Smyser, Erik L. Braun, Venkat Athmanathan, Mikhail N. Slipchenko, Sukesh Roy, and Terrence R. Meyer
Opt. Lett. 45(21) 5933-5936 (2020)

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)

Burst-mode 100 kHz N₂ ps-CARS flame thermometry with concurrent nonresonant background referencing

Daniel K. Lauriola, Paul S. Hsu, Naibo Jiang, Mikhail N. Slipchenko, Terrence R. Meyer, and Sukesh Roy
Opt. Lett. 46(21) 5489-5492 (2021)

2.05 µm chirped pulse amplification system at a 1 kHz repetition rate—2.4 ps pulses with 17 GW peak power

Lorenz von Grafenstein, Martin Bock, Dennis Ueberschaer, Azize Koç, Uwe Griebner, and Thomas Elsaesser
Opt. Lett. 45(14) 3836-3839 (2020)

Dual-probe 1D hybrid fs/ps rotational CARS for simultaneous single-shot temperature, pressure, and O₂/N₂ measurements

David Escofet-Martin, Anthony O. Ojo, Joshua Collins, Nils Torge Mecker, Mark Linne, and Brian Peterson
Opt. Lett. 45(17) 4758-4761 (2020)