Title :
Optical spectral-amplitude coder/decoders structured with circulator-free fiber-gratings array
Author :
Huang, Jen-Fa ; Tsai, Chen-Mu ; Kang, Ming-Wei
Author_Institution :
Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan, Taiwan
Abstract :
Realization of spectral-amplitude coding (SAC) in a fiber-Bragg-grating (FBG)-based optical code-division multiple-access (OCDMA) network is demonstrated. Based on the developed multiple-access coding techniques, correlation subtractions of nearly orthogonal codes have been applied. We introduce the transmissive spectral characteristics of FBGs to construct our FBG encoder/decoder. It provides several important advantages. First, the cost is lowered due to our circulator-free architecture. Second, the round-trip time problem is resolved. We can also eliminate the effect of chip power variance. The testbed consists of two active encoders and three decoders. Both matched and unmatched cases are demonstrated. Our measurements verify that our proposed scheme is successful and practicable.
Keywords :
Bragg gratings; arrayed waveguide gratings; code division multiple access; decoding; encoding; optical communication equipment; optical fibre networks; OCDMA network; chip power variance; circulator-free fiber-gratings array; correlation subtraction; fiber-Bragg-grating; optical code-division multiple-access network; optical spectral-amplitude coder; optical spectral-amplitude decoder; orthogonal codes; round-trip time problem; spectral-amplitude coding; Bragg gratings; Costs; Decoding; Fiber gratings; Frequency; Multiaccess communication; Optical arrays; Optical fiber communication; Optical fiber networks; Optical filters;
Conference_Titel :
Intelligent Signal Processing and Communication Systems, 2004. ISPACS 2004. Proceedings of 2004 International Symposium on
Print_ISBN :
0-7803-8639-6
DOI :
10.1109/ISPACS.2004.1439117