A Heterodyne Detection FM-CW Laser Radar Using a 10 micrometers Source.
Abstract
The feasibility of a heterodyne detection FM-CW laser radar capable of providing simultaneous range and velocity information was investigated. Linear triangular frequency modulation was accomplished with an acoustooptic modulator. Two separate optical configurations were investigated. Ranges to 2400 plus or minus 30 yards were measured using a two-inch retro-reflector as a target, with a 7000-yard maximum predicted range. Velocities as low as .37 m/sec were easily measured, and the system was estimated to have a velocity resolution of approximately .05 m/sec. The measured receiver sensitivity was approximately 30 db below the theoretical limit. An unexplained zero velocity return was observed from a moving target with the second optical configuration. A signal contamination of the local oscillator beam was also observed.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1974
- Accession Number
- ADA005865
Entities
People
- Maurice F. Fraunfelder Jr
Organizations
- Naval Postgraduate School