Laser Detection by Coherence Discrimination
Abstract
The axial coherence length of laser radiation is both specific and unique to lasers. An angle-scanned interferometer is described as a coherent energy modulator in a coherence-discriminating laser receiver. A symmetrical solid-spaced Fabry-Perot interferometer etalon is used. Etalon pairs are used in a logic arrangement that passes coherent laser signals and rejects incoherent background signals. Two pairs of stepped etalons are used to detect a single laser pulse. The fundamental limits of performance of this type of laser receiver are listed.
- Publication:
-
Optical Engineering
- Pub Date:
- April 1979
- DOI:
- 10.1117/12.7972352
- Bibcode:
- 1979OptEn..18..212C
- Keywords:
-
- Fabry-Perot Interferometers;
- Laser Outputs;
- Phase Coherence;
- Pulsed Lasers;
- Radiation Detectors;
- Coherent Light;
- Diffraction Patterns;
- Matched Filters;
- Performance Prediction;
- Signal Reception;
- Waveforms;
- Lasers and Masers