Abstract
Optical code division multiple access (OCDMA) is attractive because it can offer asynchronous multiple access and is capable of realizing 1:1 or 1:N access and routing operations in a common channel without optical switches in addition to allowing flexible bandwidth assignment.1 Several OCDMA schemes have been reported, in which encoding/decoding procedures are carried out in the time1–3 or wavelength4,5 domain. Time-spreading/wavelength-hopping OCDMA, utilizing both the time and wavelength domain (two-dimensional) encoding/decoding, can provide more flexible codes and greater capacity than the two schemes mentioned above.6,7 Fiber grating cascades with different reflection wavelengths6 and arrayed-waveguide gratings (AWGs) with fiber delay lines7 have already been proposed as encoder/decoders for this OCDMA. However, with the former it is difficult to tune each wavelength independently over a wide range by changing the temperature or stress, and with the latter it is difficult to vary the delays precisely. Therefore, flexible code assignment is difficult using these devices.
© 2002 Optical Society of America
PDF ArticleMore Like This
Koichi Takiguchi, Tomohiro Shibata, and Hiroshi Takahashi
OFP5 Optical Fiber Communication Conference (OFC) 2006
L. R. Chen
BThC5 Bragg Gratings, Photosensitivity, and Poling in Glass Waveguides (BGPP) 2001
Yue-Kai Huang, Konstantin Kravtsov, Ivan Glesk, Paul R. Prucnal, Christoph M. Greiner, Dmitri Iazikov, and Thomas W. Mossberg
JThA28 National Fiber Optic Engineers Conference (NFOEC) 2007