Optical implementation of bipolar codes

• Published in: IEEE journal of quantum electronics Vol. 35; no. 3; pp. 287 - 291
• Main Authors: Dennis, T., Young, J.F.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.03.1999; Institute of Electrical and Electronics Engineers
• Subjects: Applied sciences; Circuit properties; Correlation; Decoding; Design engineering; Electric, optical and optoelectronic circuits; Electronics; Exact sciences and technology; Fiber optics; Integrated optoelectronics. Optoelectronic circuits; Multiaccess communication; Optical and optoelectronic circuits; Optical data processing; Optical fiber communication; Optical fiber devices; Optical fiber polarization; Optical fiber testing; Optical fibers; Optical noise; Optical receivers; Quantum electronics; Radio frequency; Rejection; Simulation; Systems, networks and services of telecommunications; Telecommunications; Telecommunications and information theory; Transmission and modulation (techniques and equipments); Wavelength division multiplexing; Multiple access; Wide band; Optical telecommunication; Optoelectronic device; Bipolar technology; Experimental study; Communication; Optical fiber
• ISSN: 0018-9197; 1558-1713
• DOI: 10.1109/3.748832

The physical implementation of a bipolar encoding scheme suitable for WDM fiber-optic networks is reported with both experimental and theoretical results. The power spectrum of an erbium-doped superfluorescent fiber source is encoded, the bipolar correlations of the codes are verified, and rejection of multiple-access interference is demonstrated in a fiber-based testbed. Simulations of the correlation process identify key optical parameters and physical characteristics important to the design of future systems. A modification to the experimental testbed, made according to the theoretical analysis, results in improved correlation performance.