Interrogator for a plurality of sensor fiber optic gratings...

Details Interrogator for a plurality of sensor fiber optic gratings... Interrogator for a plurality of sensor fiber optic gratings...

2011-08-09

2011-08-09

Le, Que T (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C250S23700G

Reexamination Certificate

active

07994469

ABSTRACT:
An interrogator for a plurality of sensor fiber optic gratings. The interrogator includes a broadband optical source; at least one beam splitter directing output of the optical source to the sensor fiber optic gratings; at least one linear filter for converting changes in peak reflection wavelength to changes in intensity; at least one optical receiver; at least one amplifier associated with each optical receiver; and an active closed-loop circuit following the at least one amplifier to provide bias voltage stabilization.

REFERENCES:
patent: 4155005 (1979-05-01), Knowlton et al.
patent: 5712932 (1998-01-01), Alexander
patent: 2002/0063866 (2002-05-01), Kersey et al.

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