OPTICAL TERMINATION PROCESSING CIRCUIT

摘要

PROBLEM TO BE SOLVED: To provide an optical termination processing circuit that can easily conduct input limit and wavelength assignment and attain versatility an economy. SOLUTION: An optical signal generated by modulating a light source 3 with transmission data is given to a disk type filter unit 1 and a power sensor 7 via a photocoupler 5, the power sensor 7 detects power of an optical signal given to the disk type filter unit 1 to control a prospective angle of the disk type filter on the basis of the comparison with a reference value so as to control a transmitting wavelength of an optical signal sent to an optical fiber access line thereby preventing an excess optical signal and transmission of an illegal wavelength light to the optical fiber access line.