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The feasibility of using InP: Fe photoconductive devices as high-speed microwave switches has been demonstrated in the 0.01 - 10 GHz frequency range, by fabricating a fiber optic compatible modified interdigitated gap (MIG) structure. Rise and fall times of less than 100 ps have been measured and a power switching ratio (PSWR) of 13 dB at 10 GHz has been achieved when illuminating the device with...
A CO2-laser long-path absorption system for air pollution monitoring has been computer automated. Both the lasers and the electronic circuits are controlled by a computer. Real-time estimation of both systematic error and imprecision is used to select an optimum measurement strategy for each different pollution situation expected. The system has been used in a field experiment in the vicinity of a...
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