Optically pumped submillimeter laser heterodyne receivers - Astrophysical observations and recent technical developments

Astronomy and Astrophysics – Astronomy

Scientific paper

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Infrared Astronomy, Laser Pumping, Optical Heterodyning, Optical Pumping, Submillimeter Waves, Superheterodyne Receivers, Astronomical Observatories, Carbon Dioxide Lasers, Nasa Space Programs

Scientific paper

NASA's prospective sub-mm-wave astrophysical missions encompass the Small Explorer Submillimeter Wave Astronomy Satellite, scheduled for launch in 1995, the Submillimeter Intermediate Mission, and the Large Deployable Reflector; until these are operational, sub-mm observations will be conducted at mountain sites and aboard aircraft platforms. Attention is presently given to the technical challenges faced by terahertz-range receiver developers, and it is noted that optically pumped sub-mm lasers furnish the only practical local oscillation source for heterodyne receivers in the 600-3000 GHz range. An account is given of ground-based and airborne astrophysical applications of heterodyne receivers.

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