Design of multi-channel optical code-division multiple-access encoders and decoders based on sampled fiber Bragg gratings |
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Authors: | Kunhua Wen Lianshan Yan Wei Pan Bin Luo Xihua Zou Hongna Zhu |
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Institution: | Center for Information Photonics & Communications, School of Information Science and Technology, Southwest Jiaotong University, Chengdu 610031, Sichuan, China |
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Abstract: | An encoding/decoding scheme of multi-channel optical code-division multiple-access (OCDMA) system using sampled fiber Bragg gratings (SFBGs) is proposed and numerically investigated. A multiple-phase-shift (MPS) technique based SFBG is first developed as a dense wavelength-division multiplexing (DWDM) device to accommodated multiple channels. The OCDMA scheme is achieved through phase coding/encoding on each individual channel of the SFBG and the auto correlative ratio for each user is larger than 14.3 dB. The whole system exhibits enhanced performance in terms of the capacity and security since the OCDMA technique is simultaneously implemented for all channels using the single SFBG. |
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Keywords: | Code-division-multiple-access Sampled fiber Brag grating Multiple-phase-shift |
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