We report on the design and characterization of a highly coherent mid-IR source at 3.57μm based on a single-frequency optical parametric oscillator. Detailed frequency and amplitude noise spectra have been measured. The rms intensity noise from 1.2 to 1000 Hz was 0.03%, and a rms frequency drift of 8 kHz in 1 ms was observed. We have also demonstrated the utility of this source for coherent laser radar applications by measuring micro-Doppler spectra from vibrating targets.
© 2001 Optical Society of America
(010.1300) Atmospheric and oceanic optics : Atmospheric propagation
(190.4360) Nonlinear optics : Nonlinear optics, devices
(190.4970) Nonlinear optics : Parametric oscillators and amplifiers
(280.3340) Remote sensing and sensors : Laser Doppler velocimetry
Frank Hanson, Pete Poirier, and Mark A. Arbore, "Single-frequency mid-infrared optical parametric oscillator source for coherent laser radar," Opt. Lett. 26, 1794-1796 (2001)