Laser remote chemical sensors at Raytheon

David B. Cohn; Joseph M. Fukumoto; James G. Shepard; Cynthia R. Swim

doi:10.1117/12.454429

31 January 2002 Laser remote chemical sensors at Raytheon

David B. Cohn, Joseph M. Fukumoto, James G. Shepard, Cynthia R. Swim

Proceedings Volume 4539, Remote Sensing of Clouds and the Atmosphere VI; (2002) https://doi.org/10.1117/12.454429
Event: International Symposium on Remote Sensing, 2001, Toulouse, France

Abstract

Raytheon and the U.S. Army have been developing laser remote chemical sensors for the last decade. This has included advanced transmitter and sensor development, field testing, and concepts for spacecraft, aircraft, unmanned aerial vehicles, ground-mobile transports, and fixed sites. The WILDCAT sensor utilizes a wavelength agile CO₂ laser with output energy of 1 J/pulse at a repetition rate of 100 Hz for ranges of 40 km. The receiver is composed of a 60 cm dia. telescope and HgCdTe detector, integrated into a gimbal system with full hemispherical scan. Algorithms allow for real-time data processing and concentration map display. An all solid state sensor breadboard has also been developed that is capable of 300 (mu) J output at 8-12 micrometers and 300 Hz repetition rate. The system is based on a Nd:YAG pump slab laser and two-stage, angle-tuned, optical parametric oscillator wavelength shifter. The system provides for power efficiency, compactness, and light weight that are consistent with manportability. Anticipated horizontal range is 3 km on the ground and 5 km vertically. Analysis of a space-based, low earth orbit system shows that chemical and biological species detection can be performed effectively by sensors derived from the laser components developed under these programs.

Citation Download Citation

David B. Cohn, Joseph M. Fukumoto, James G. Shepard, and Cynthia R. Swim "Laser remote chemical sensors at Raytheon", Proc. SPIE 4539, Remote Sensing of Clouds and the Atmosphere VI, (31 January 2002); https://doi.org/10.1117/12.454429

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