A study of three-dimensional optical code-division multiple-access for optical fiber sensor networks. (January 2016)

• Record Type: Journal Article
• Authors: Yen, Chih-Ta; Chen, Chih-Ming
• Is Part Of: Computers & electrical engineering. Volume 49(2016)
• Page Start: 136
• Page End: 145
• Publication Date: 2016-01
• Subjects: Optical fiber sensors (OFSs) -- Three-dimensional (3-D) -- Optical code-division multiple-access (OCDMA) -- Fiber-Bragg grating (FBG) -- Phase-induced intensity noise (PIIN) -- Multiple access interference (MAI); Computer engineering -- Periodicals; Electrical engineering -- Periodicals; Electrical engineering -- Data processing -- Periodicals; Ordinateurs -- Conception et construction -- Périodiques; Électrotechnique -- Périodiques; Électrotechnique -- Informatique -- Périodiques; Computer engineering; Electrical engineering; Electrical engineering -- Data processing; Periodicals; Electronic journals; 621.302854
• DOI: 10.1016/j.compeleceng.2015.02.016
• Languages: English
• ISSNs: 0045-7906

Abstract

Graphical abstract: Integrated configuration of three-dimensional optical code-division multiple-access for optical fiber sensor networks. Highlights: The OFS network using 3-D wavelength/time/spatial optical CDMA scheme. OFS have advantages of high bandwidth and resist electromagnetic interference. The 3-D codes by extending modified quadratic congruence and M-matrix codes. Overcoming the restriction of single pulse per row in traditional technology. The noises of PIIN and MAI can be suppressed by balance-detection scheme. Abstract: This study proposes a novel optical fiber sensor (OFS) network using three-dimensional (3-D) wavelength/time/spatial optical code-division multiple-access (OCDMA) scheme. The proposed 3-D modified quadratic congruence/M-matrix (MQC/M-matrix) coding scheme overcome the restriction of single pulse per row inherent in traditional three-dimensional codes and maintain a high signal-to-noise ratio even when source power is low. The 3-D system is implemented using optical switches (OSW), fiber-Bragg gratings (FBGs), optical splitter and optical combiner. The noises of phase-induced intensity noise (PIIN) and multiple access interference (MAI) in the decoding mechanism can be suppressed by using a spectral spreading scheme and balance-detection in the receivers. By constructing 3-D codes using bipolar pseudorandom (PN) codes rather than unipolar codes provides a significant increase in the maximum permissible number of active sensor nodes.