Abstract
Continuous wave (CW) LIDARs possess certain advantages over pulsed LIDARs including a reduction in peak power, fiber based operation, and ease of amplification. CW LIDARs typically rely upon modulation techniques such as chirping and pseudo-noise (PN) coding in order to obtain range information. Chirped techniques have complications resulting from nonlinear frequency chirp.1 PN coded LIDAR,2 is an alternative approach, which utilizes on/off keyed unipolar baseband PN codes. However, most unipolar codes exhibit significant side-lobes in their autocorrelation functions. This leads to a poor gating contrast.
© 2002 Optical Society of America
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