A new shared AWG-based OCDMA scheme implemented with time-spreading and wavelength-group-hopping embedded M-sequence code

作者：Chang Yao Tang^*; Huang Jen Fa; Yen Chih Ta; Wang Chuen Ching; Cheng Hsu Chih; Hsu Kai Chun

来源：Optical Fiber Technology, 2010, 16(2): 114-123.

DOI：10.1016/j.yofte.2010.01.005

• 2D TS/WH
• SAC-OCDMA
• Time-spreading and wavelength-group-hopping
• embedded M-sequence code (TS/GH embedded M-sequence code)
• Arrayed-waveguide grating router (AWG router)
• Modified prime-hop code (MPHC)

This paper exploits the inherent cyclic and periodic free-spectral-range (FSR) properties of arrayed-waveguide grating (AWG) routers to construct a two-dimensional (2D) time-spreading and wavelength-group-hopping embedded M-sequence code for optical multiple-access networks. In the proposed codecs (encoder/decoder), a. ne arrayed-waveguide grating (AWG) is used to generate an M-sequence code pattern, which is then spread in the wavelength domain by multiple coarse AWGs. The signals produced at the output ports of the coarse AWGs are then spread in the time domain using optical delay lines. The 2D code is evaluated in terms of its correlation, bit-error-rate (BER) and cardinality characteristics. It is shown that the TS/GH embedded M-sequence code yields a significant improvement in both the BER and cardinality performance of the optical multiple-access networks compared to that obtained using conventional prime-hop code (PHC), modified prime-hop code (MPHC), Barker and Walsh-based bipolar-bipolar sequence.

• 出版日期2010-3