Optics: measuring and testing – By light interference – Using fiber or waveguide interferometer
Reexamination Certificate
2005-01-21
2008-09-23
Connolly, Patrick (Department: 2877)
Optics: measuring and testing
By light interference
Using fiber or waveguide interferometer
C356S519000, C385S012000
Reexamination Certificate
active
07428054
ABSTRACT:
A micro-optical fiber tip based sensor system for pressure, acceleration, and pressure gradient measurements in a wide bandwidth, the design of which allows for multiplexity of the input side of the system is based on micro-electromechanical fabrication techniques. The optical portion of the system is based on low coherence fiber-optic interferometry techniques which has a sensor Fabry-Perot interferometer and a read-out interferometer combination that allows a high dynamic range and low sensitivity to the wavelength fluctuation of the light source. A phase modulation and demodulation scheme takes advantage of the Integrated Optical Circuit phase modulator and multi-step phase-stepping algorithm for providing high frequency and real time phase signal demodulation. The system includes fiber tip based Fabry-Perot sensors each of which has a diaphragm that is used as a transducer.
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Balachandran Balakumar
Yu Miao
Connolly Patrick
Richey Scott M
Rosenberg , Klein & Lee
University of Maryland
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