Optical Code Division Multiplexing (OCDMA) is a method used to
enable simultaneous transmission of multiple optical data flows
over the same fiber using the same wavelength. In OCDMA, isolation
between different data flows is achieved using a set of
uncorrelated, or loosely correlated, spreading codes to encode the
transmitted signal and decode it at the receiver side. The process
of encoding and decoding is performed entirely in the optical
domain. This increases the granularity of traffic isolation in the
optical domain while maintaining higher speed switching because of
the all-optical encoding/decoding capability. Although code
division multiplexing is a well established technique in wireless
transmission where all processing of data and switching are
performed electronically, there are many challenges in applying
this scheme in the optical domain mainly due to the different
characteristics of the medium and the signals values. This book
addresses three main aspects of OCDMA: Use of OCDMA for sub-
wavelength switching, modeling the performance of OCDMA switching,
and design of new mechanisms to enhance the performance of OCDMA.
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