Optical sensing systems with plural wavelengths and wavelength s

Details Optical sensing systems with plural wavelengths and wavelength s Optical sensing systems with plural wavelengths and wavelength s

1991-11-29

1993-07-13

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250226, H01J 516

Patent

active

052276244

ABSTRACT:
An optical sensing system (e.g. hydrophone) includes a plurality of laser light sources for producing light signals of different frequencies which are combined by a Bragg cell and launched into a single optical fibre leading to an optical sensor array arrangement. This sensor array arrangement includes a plurality of optical sensors separated by redirecting means for redirecting light signals along an optical fibre in time displaced relationship to an optical detector.

REFERENCES:
patent: 4506153 (1985-03-01), Ohno
patent: 4653916 (1987-03-01), Henning et al.
patent: 4775216 (1988-10-01), Layton
patent: 4825424 (1989-04-01), Lamb et al.
patent: 4888480 (1989-12-01), Dakin et al.
patent: 4904864 (1990-02-01), Dakin et al.

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