Strain insensitive optical phase locked loop

Details Strain insensitive optical phase locked loop Strain insensitive optical phase locked loop

1996-04-23

1998-07-14

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

385 12, G01B 530, G02B 616

Patent

active

057808449

ABSTRACT:
A strain sensor uses optical fibers including strain insensitive portions and a strain sensitive portion. The optical fibers form a sensitive arm of an optical phase locked loop (OPLL). The use of the OPLL allows for multimode optical fiber to be used in a strain insensitive configuration. Only strain information for the strain sensitive portion is monitored rather than the integrated strain measurements commonly made with optical fiber sensors.

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