At present, according to various optical and signal processing methods, there are mainly three detection modes in laser radar system: direct detection, heterodyne detection and homodyne detection. A homodyne laser radar system made up of a narrow line-width laser, an amplitude modulator and balanced detector is introduced here. Both transmitted and local oscillator (LO) signals are amplitude modulated by the same chirp signal, and the de-chirping process is completed in the optical domain. When we do signal processing on range and Doppler frequency, we use chirp-z method besides normal Fourier Transform. In this way, we get the experiment data more accurately. The experiment data indicates that the range and velocity precision reaches cm and mm/s dimension which are basically conforming to the theoretical precision.
Research on range-Doppler homodyne detection system
International Symposium on Photoelectronic Detection and Imaging 2011: Space Exploration Technologies and Applications ; 2011 ; Beijing,China
Proc. SPIE ; 8196
2011-08-15
Conference paper
Electronic Resource
English
Research on range-Doppler homodyne detection system [8196-73]
British Library Conference Proceedings | 2011
|Chirped Lidar Using Simplified Homodyne Detection
British Library Online Contents | 2009
|HOMODYNE DETECTION LASER-INDUCED THERMAL ACOUSTICS VELOCIMETRY
British Library Conference Proceedings | 2000
|