Tuning optical cavities

Details Tuning optical cavities Tuning optical cavities

2007-02-05

2009-12-15

Lee, Hwa (Andrew) S (Department: 2886)

Optics: measuring and testing

By light interference

Having partially reflecting plates in series

C356S517000

Reexamination Certificate

active

07633629

ABSTRACT:
A tunable optical cavity can be tuned by relative movement between two reflection surfaces, such as by deforming elastomer spacers connected between mirrors or other light-reflective components that include the reflection surfaces. The optical cavity structure includes an analyte region in its light-transmissive region, and presence of analyte in the analyte region affects output light when the optical cavity is tuned to a set of positions. Electrodes that cause deformation of the spacers can also be used to capacitively sense the distance between them. Control circuitry that provides tuning signals can cause continuous movement across a range of positions, allowing continuous photosensing of analyte-affected output light by a detector.

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