Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1993-03-26
1994-04-19
Fields, Carolyn E.
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
2503385, 25033901, G01J 502
Patent
active
053048059
ABSTRACT:
A GaAs/AlGaAs multiple-quantum-well (MQW) is used as an optical mixer for environmental monitoring of atmospheric emission or absorption signals in the infrared (IR) region. The atmospheric signals are combined with coherent laser local oscillator emission lines to produce IF signals within the electrical bandwidth of the MQW mixer.
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patent: 5229614 (1993-07-01), Andersson et al.
"Atmospheric Monitoring Using Heterodyne Detection Techniques", Robert T. Menzies, Optical Engineering, vol. 17, No. 1, Jan./Feb. 1978, pp. 44-49.
"Infrared Heterodyne Spectroscopy", Mumma et al., Optical Engineering, Mar./Apr. 1982, vol. 21, No. 2, pp. 313-319.
"Remote Infrared Heterodyne Radiometer Measurements of Atmospheric Ammonia Profiles", Hoell et al, Geophysical Research Letters, vol. 7, No. 5, May 1980, pp. 313-316.
"Detection of Optical and Infrared Radiation", R. H. Kingston, Springer Series in Optical Sciences, 1978, pp. 52-65.
"High Sensitivity Low Dark Current 10 .mu.m GaAs Quantum Well Infrared Photodetectors", Levine et al., Appl. Phys. Lett. 56(9), Feb. 26, 1990, pp. 851-853.
"Performance Limitations of GaAs/AlGaAs Infrared Superlattices", M. A. Kinch, Appl. Phys. Lett. 55(20), Nov. 13, 1989, pp. 2093-2095.
Brown Elliott R.
McIntosh K. Alexander
Fields Carolyn E.
Massachusetts Institute of Technology
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