Research on parametrical asymmetry of FBG encoder/decoder on the performance of grating-based FFH-OCDMA system

Menghu Cao; Jinfang Zhou

doi:10.1117/12.636276

8 December 2005 Research on parametrical asymmetry of FBG encoder/decoder on the performance of grating-based FFH-OCDMA system

Menghu Cao, Jinfang Zhou

Author Affiliations +

Proceedings Volume 6021, Optical Transmission, Switching, and Subsystems III; 602146 (2005) https://doi.org/10.1117/12.636276
Event: Asia-Pacific Optical Communications, 2005, Shanghai, China

Abstract

Performance of all-fiber fast frequency hop optical code division multiple access system (FFH-OCDMA) is studied in case parametrical difference exists between the fiber Bragg grating (FBG) arrays based encoder/decoder, i.e., the relevant gratings' Bragg wavelengths or relative positions are not strictly consistent. If there are such parametrical differences, some optical pulses with specific frequencies will be lost partially, or even entirely, which reduces the peak value of the self-correlation decoding output. The multi-users simulation model of FFH-OCDMA system is presented amply in the paper, which consists of these components: signal source, encoder, decoder, fiber channel, receive detector, and data analysis module. Simulation result is presented and discussed. It shows that the system performance drops down sharply with a larger wavelength inconsistency or with a larger position relative offset, especially when the number of FBG is smaller. It is also concluded that performance degradation can be alleviated by employing longer FBG array, but with the expense of higher system complexity.

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Menghu Cao and Jinfang Zhou "Research on parametrical asymmetry of FBG encoder/decoder on the performance of grating-based FFH-OCDMA system", Proc. SPIE 6021, Optical Transmission, Switching, and Subsystems III, 602146 (8 December 2005); https://doi.org/10.1117/12.636276

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KEYWORDS

Fiber Bragg gratings

Computer programming

Reflectivity

Code division multiplexing

Optical filters

Apodization

Filtering (signal processing)

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