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Updated: Jun 8, 2026

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Differential Imaging of Biological Structures with Doubly-resonant Coherent Anti-stokes Raman Scattering (CARS)
Published on: October 17, 2010
Enhancement of coherent laser radar performance by predetection amplification
Applied Optics
|October 12, 2010
Abstract:
A long-path carbon dioxide laser amplifier, based on a coaxial radio frequency discharge gain medium combined with a Herriott cell folding system, is investigated as a predetection amplifier in a coherent laser radar system. The amplifier signal gain and noise characteristics are measured, and the signal-to-noise enhancement produced in a Doppler radar system is determined over a range of operating conditions of the amplifier. A maximum enhancement factor of 12.4 dB is measured for a cw gain cell, which is in good agreement with the theoretical prediction.
