Abstract
A high-resolution random-modulation continuous wave lidar for surface detection using a semiconductor laser diode is presented. The laser diode is intensity modulated with the pseudorandom binary sequence. Its enhanced resolution is achieved via interpolation and a novel front-end analog technique, lowering the requirement of the analog-to-digital converter sampling rate and the associated circuitry. Its mathematical model is presented, including the derivation of the signal-to-noise ratio and the distance standard deviation. Analytical and experimental results demonstrate its capability to achieve distance accuracy of less than within acquisition time, over distances ranging from 1 to . The laser diode emits of optical power at a wavelength of .
© 2011 Optical Society of America
Full Article | PDF ArticleMore Like This
N. Takeuchi, N. Sugimoto, H. Baba, and K. Sakurai
Appl. Opt. 22(9) 1382-1386 (1983)
Nobuo Takeuchi, Hiroshi Baba, Katsumi Sakurai, and Toshiyuki Ueno
Appl. Opt. 25(1) 63-67 (1986)
Chikao Nagasawa, Makoto Abo, Hideki Yamamoto, and Osamu Uchino
Appl. Opt. 29(10) 1466-1470 (1990)