| 摘要 |
Provided are an optical code-division multiple-access (O-CDMA) network system and method and an optical encoder and decoder in the system. The O-CDMA network system includes a central station and at least one subscriber unit. In a code assigning method of the optical code-division multiple-access network system, first, the subscriber unit transmits a code assignment request signal to the central station. Then, the central station assigns a code to the subscriber unit. Thereafter, the subscriber unit programs an encoding and decoding code based on the assigned code. The optical encoder and decoder includes a refraction grating, arrayed optical waveguides, optical switches, and optical reflectors. Therefore, a central code assignment scheme can be achieved, and programming of the encoder and decoder is possible.
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