I. Introduction
Optical code-division multiplexing (OCDM) is a multiplexing technique that by assigning a different optical code (OC) to each channel allows all the channels to transmit on a single fiber, at a single wavelength and at the same time. In wireless communications, this technology is the foundation for 3G services, providing better capacity for telephony and broadband services and allowing more subscribes to connect at any given time, using the full available spectrum [1]. Another advantage inherent to OCDM is the data confidentiality, because messages are encoded at the transmitter, and they can be recovered only by an authorized user, who knows the codes.