Fiber-based ladar transceiver for range/doppler imaging with fre

Details Fiber-based ladar transceiver for range/doppler imaging with fre Fiber-based ladar transceiver for range/doppler imaging with fre

1996-05-17

1998-11-10

Hellner, Mark

Optics: measuring and testing

Range or remote distance finding

With photodetection

356 509, 356 285, G01C 308

Patent

active

058351990

ABSTRACT:
The present invention provides a laser radar (ladar) imaging system in which both the range of an object being imaged and the velocity of the object can be measured simultaneously and accurately with superior range resolution and with minimal ambiguity. Use is made of a ladar system based on matched-filter cross-correlation of light pulse waveforms that have multiple, simultaneous frequency components with phase variation and incommensurate spectral frequency spacing between frequency components.

REFERENCES:
patent: 4960329 (1990-10-01), Schofield
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patent: 5446530 (1995-08-01), Reeder et al.
patent: 5485009 (1996-01-01), Meyzonnetie et al.
patent: 5534993 (1996-07-01), Ball et al.
"Pulsed Operation of an Optical Feedback Frequency Synthetiser," Hodgkinson and Coppin, Electronics Letters, vol. 26, No. 15, pp. 1155-1157, (Jul. 1990).
"Frequency Translation of Light Waves by Propagation Around an Optical Ring Circuit Containing a Frequency Shifter: I. Experiment," Shimizu, Horiguchi, Koyamada, Applied Optics, vol. 32, No. 33, 6718-6726 (Nov. 1993).
"Optical Isolators Adapt to Communicaton Needs," Donald K. Wilson, Laser Focus World, Apr. 1991.
"High-Power Q-switched Erbium Fiber Laser Using an All-Fiber Intensity Modulator," Alain Chandonnet and Gilles Larose, Optical Engineering, vol. 32 No. 9, 2031-2035 (Sep. 1993).
Brochure: "Panda Fiber Polarization Maintaining Fiber," Fujikura Ltd. Fiber, Corning, New York.

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