Time multiplexed fiber optic sensor

Details Time multiplexed fiber optic sensor Time multiplexed fiber optic sensor

1989-06-20

1991-04-02

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

25022712, 25023119, H01J 516

Patent

active

050049119

ABSTRACT:
An optical sensor system utilizes time multiplexing of two optical signals developed from a common light source. Relative amplitudes of the two optical signals are varied as a function of a measured parameter, time multiplexed, and coupled to a common optical transmission path. At the receiving end of the optical transmission path the two optical signals are converted to electrical signals by the same detector, thus eliminating sensitivity to source gain, interconnect fiber loss, and detector gain as sources of calibration error.

REFERENCES:
patent: 4427881 (1984-01-01), Ruell
patent: 4432599 (1984-02-01), McMahon
patent: 4740081 (1988-04-01), Martens et al.
patent: 4800266 (1989-01-01), Poorman

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