DocumentCode :
348423
Title :
A wideband wavelength discriminator using 3/spl times/3 directional coupler
Author :
Song, M.
Author_Institution :
Dept. of Electr. Eng., Pennsylvania State Univ., University Park, PA, USA
Volume :
2
fYear :
1999
fDate :
Aug. 30 1999-Sept. 3 1999
Firstpage :
511
Abstract :
Fiber interferometers have been widely used as wavelength discriminators of fiber Bragg grating sensors. The positive and negative slopes of the interferometer´s transfer function can be used as an effective sensors wavelength discriminator, which convert Bragg wavelength shift to variations of the transmitted optical intensity. However due to its periodicity, the dynamic range of measurement is limited by the quasi-linear range in the slopes. The fluctuating phase bias, which is temperature dependent, is also a limiting factor of interferometric measurement because it leads to the variation in the system sensitivity. To solve the problems while maintaining high-resolution, a newly developed quadrature signal processing is applied to the photodetector signals.
Keywords :
Bragg gratings; light interferometry; optical fibres; optical information processing; optical transfer function; 3/spl times/3 directional coupler; convert Bragg wavelength shift; effective sensors wavelength discriminator; fiber Bragg grating sensors; fiber interferometers; high-resolution; interferometer´s transfer function; periodicity; photodetector signals; system sensitivity; transmitted optical intensity; wideband wavelength discriminator; Interferometers; Optical fiber sensors; Optical interferometry; Optical sensors; Optical signal processing; Signal processing; Transfer functions; Wavelength conversion; Wavelength measurement; Wideband;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Lasers and Electro-Optics, 1999. CLEO/Pacific Rim '99. The Pacific Rim Conference on
Conference_Location :
Seoul, South Korea
Print_ISBN :
0-7803-5661-6
Type :
conf
DOI :
10.1109/CLEOPR.1999.811545
Filename :
811545
Link To Document :
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