OPTICAL CODER, OPTICAL DECODER, AND OPTICAL CODE DIVISION MULTIPLEXING TRANSMISSION/RECEPTION APPARATUS

PROBLEM TO BE SOLVED: To allow revision of a setting code without the need for highly accurate temperature control and warranting a stable operation. SOLUTION: A code division multiplexed signal 61 is given to an optical pulse recovery section via an optical circulator 60. The optical pulse recovery section includes a multiplexer/demultiplexer 62 and first to n-th optical pulse recovery means connected in parallel with each other and connected to the multiplexer/demultiplexer. Optical delay adjustment units 64-1 to 64-n are respectively arranged between the multiplexer/demultiplexer and the first to n-th optical pulse recovery means. In the first optical pulse recovery means, there are installed n-sets of phase decoding sections to which Code-1 to Code-n are sequentially set in the order from a side of the optical circulator and whose Bragg wavelength is λnwithout any air gap among the phase decoding sections. Bragg wavelengths from the second to n-th optical pulse recovery means are respectively λn-1to λ1. COPYRIGHT: (C)2008,JPO&INPIT