Optics: measuring and testing – By light interference – Rotation rate
Reexamination Certificate
2007-06-28
2009-11-17
Lyons, Michael A (Department: 2877)
Optics: measuring and testing
By light interference
Rotation rate
Reexamination Certificate
active
07619743
ABSTRACT:
An optical sensor includes a directional coupler comprising at least a first port, a second port, and a third port. The first port is in optical communication with the second port and with the third port such that a first optical signal received by the first port is split into a second optical signal that propagates to the second port and a third optical signal that propagates to the third port. The optical sensor further includes a photonic bandgap fiber having a hollow core and an inner cladding generally surrounding the core. The photonic bandgap fiber is in optical communication with the second port and with the third port. The second optical signal and the third optical signal counterpropagate through the photonic bandgap fiber and return to the third port and the second port, respectively. The photonic bandgap fiber has a phase thermal constant S less than 8 parts-per-million per degree Celsius.
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Dangui Vinayak
Digonnet Michel J. F.
Kim Hyang Kyun
Kino Gordon S.
Knobbe Martens Olson & Bear LLP
Lyons Michael A
The Board of Trustees of the Leland Stanford Junior University
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