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Updated: May 4, 2026

Differential Imaging of Biological Structures with Doubly-resonant Coherent Anti-stokes Raman Scattering CARS
Published on: October 17, 2010
Intracavity phase-matched coherent anti-Stokes Raman spectroscopy for trace gas detection
Shin-ichi Zaitsu1, Totaro Imasaka
1Department of Applied Chemistry, Graduate School of Engineering, Kyushu University.
Abstract:
We present a novel, cavity-enhanced spectroscopic technique based on a phase-matched Raman process to detect trace quantities of gas. The essence of this technique is the careful control of cavity dispersion to satisfy the phase-matching condition of coherent anti-Stokes Raman scattering (CARS) enhanced in a high-finesse optical cavity. A 6000-fold improvement of the CARS signal is observed under optimized conditions, indicating that this is a promising tool to quantify Raman-active molecules with an extremely low detection limit.
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