Equivalent phase shift in a fiber Bragg grating achieved by changing the sampling period

It is proposed and demonstrated experimentally for the first time to achieve the desired phase shifts within one channel of a sampled Bragg grating by changing the sampling period. Only ordinary phase masks and submicrometer precision are needed, leading to improved flexibility, repeatability, and c...

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Bibliographic Details
Published in:IEEE photonics technology letters 2004-10, Vol.16 (10), p.2284-2286
Main Authors: Dai, Y., Chen, X., Jiang, D., Xie, S., Fan, C.
Format: Article
Language:English
Subjects:
Bragg gratings
Channels
Chirp modulation
Distributed feedback devices
Encoders
Equivalence
Fiber gratings
Fibers
Flexibility
Multiaccess communication
Optical device fabrication
Optical feedback
Optical filters
Optical reflection
Phase shift
Sampling
Sampling methods
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Summary:It is proposed and demonstrated experimentally for the first time to achieve the desired phase shifts within one channel of a sampled Bragg grating by changing the sampling period. Only ordinary phase masks and submicrometer precision are needed, leading to improved flexibility, repeatability, and cost-effectiveness in fiber Bragg grating design and fabrication especially when multiple and mutable phase shifts are required. Based on this method, a /spl pi/-shift and two bipolar encoders for direct-sequence optical code-division multiple-access systems are obtained experimentally, which are in good agreement with simulation.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2004.834530