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  • Vol. 33, Iss. 9 — May. 1, 2008
  • pp: 1017–1019

Approach to all-optical bipolar direct-sequence ultrawideband coding

Qing Wang and Jianping Yao  »View Author Affiliations


Optics Letters, Vol. 33, Issue 9, pp. 1017-1019 (2008)
http://dx.doi.org/10.1364/OL.33.001017


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Abstract

An approach to all-optical bipolar direct-sequence ultrawideband (UWB) encoding for multiple access communications is proposed and demonstrated. The bipolar coding is performed based on electro-optic phase modulation and phase modulation to intensity modulation (PM-IM) conversion in a fiber Bragg grating (FBG) array that serves as a multichannel frequency discriminator. The chip number and the chip period of the code are determined by the number of FBGs and their physical separation. By locating the optical carriers that carry a Gaussian pulse at the left or right slopes of the FBG reflection spectra, bipolar direct-sequence UWB codes are generated. A bipolar UWB coding system with a code length of 4 is experimentally demonstrated.

© 2008 Optical Society of America

OCIS Codes
(060.2330) Fiber optics and optical communications : Fiber optics communications
(060.2340) Fiber optics and optical communications : Fiber optics components
(070.6020) Fourier optics and signal processing : Continuous optical signal processing

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: January 28, 2008
Revised Manuscript: March 18, 2008
Manuscript Accepted: March 31, 2008
Published: April 30, 2008

Citation
Qing Wang and Jianping Yao, "Approach to all-optical bipolar direct-sequence ultrawideband coding," Opt. Lett. 33, 1017-1019 (2008)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-33-9-1017


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