TY - GEN
T1 - The influence factors and optimization methods of the local oscillator power for coherent doppler lidar
AU - Bu, Zhichao
AU - Zhang, Yinchao
AU - Chen, Siying
AU - Qiu, Zongjia
AU - Chen, He
AU - Guo, Pan
AU - Chen, Shengzhe
AU - Ge, Xianying
PY - 2011
Y1 - 2011
N2 - Coherent doppler lidar for wind is based on the heterodyne detection between local oscillator signal and the echo signal. Optimum optical local oscillator power is an important factor of the signal to noise ratio. The dynamic range of echo signal, the relative intensity noise and the photoelectric detector saturation effect are studied comprehensively as the local oscillator power influence factors for the first time. The expression of the local oscillator power and SNR is derived. Using the computer simulation, the conclusion that the dynamic range of the echo signal will not affect the optimum of the local oscillator is obtained. Selecting different values of the relative intensity noise, the curves of the SNR versus local oscillator are given. Comparing the SNR formula in the quantum limit with the derived SNR formula, the saturation effect of the photoelectric devices is studied.
AB - Coherent doppler lidar for wind is based on the heterodyne detection between local oscillator signal and the echo signal. Optimum optical local oscillator power is an important factor of the signal to noise ratio. The dynamic range of echo signal, the relative intensity noise and the photoelectric detector saturation effect are studied comprehensively as the local oscillator power influence factors for the first time. The expression of the local oscillator power and SNR is derived. Using the computer simulation, the conclusion that the dynamic range of the echo signal will not affect the optimum of the local oscillator is obtained. Selecting different values of the relative intensity noise, the curves of the SNR versus local oscillator are given. Comparing the SNR formula in the quantum limit with the derived SNR formula, the saturation effect of the photoelectric devices is studied.
KW - Optimum local oscillator power
KW - Range of echo signal
KW - The relative intensity noise
KW - The saturation effect of photoelectric detector
UR - http://www.scopus.com/inward/record.url?scp=80052236448&partnerID=8YFLogxK
U2 - 10.1109/RSETE.2011.5964871
DO - 10.1109/RSETE.2011.5964871
M3 - Conference contribution
AN - SCOPUS:80052236448
SN - 9781424491711
T3 - 2011 International Conference on Remote Sensing, Environment and Transportation Engineering, RSETE 2011 - Proceedings
SP - 2692
EP - 2695
BT - 2011 International Conference on Remote Sensing, Environment and Transportation Engineering, RSETE 2011 - Proceedings
T2 - 2011 International Conference on Remote Sensing, Environment and Transportation Engineering, RSETE 2011
Y2 - 24 June 2011 through 26 June 2011
ER -