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Title: FBG sensor interrogation method using semiconductor optical amplifier in ring cavity configuration
Authors: Tam, Hwa-yaw
Chung, Wenghong
Subjects: Fiber bragg grating sensors
Optical circulator
FBG sensors
Time division multiplexing interrogation
Issue Date: 17-Mar-2009
Source: US Patent 7,505,642 B2. Washington, DC: US Patent and Trademark Office, 2009.
Abstract: A sensor device that uses a number of bragg grating (FBG) sensors and novel interrogation system with a ring cavity configuration for simultaneous time-division-multiplexex (TDM) and wavelength-division-multiplexed (WDM) interrogation of FBG sensors. The ring cavity includes an amplifier, and output coupler and an optical circulator. The coupler is connected to a wavelength measuring system and the optical circulator is connected to the FBG sensors. The FBG sensors can be in a number of groups. TDM interrogation is applied to each group of FBG sensors while WDM interrogation is applied to each FBG sensors within each group.
Rights: Assignee: The Hong Kong Polytechnic University.
Type: Patent
Appears in Collections:Patents of PolyU
EE Patents

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