COMPRESSOR FOR REVERSELY COMPRESSING SIGNAL AND METHOD FOR REVERSELY COMPRESSING SIGNAL

摘要

PROBLEM TO BE SOLVED: To apply a feedback algorithm in a way that pulse trains constituting compressed signals are reinputted with a time difference and sequentially reversely compressed through their circulation. SOLUTION: The loop mirror 35 is provided therein with a phase changing means 40 comprising a SOA(semiconductor optical amplifier) having a specified gain, and a polarization controller 42, at the interior thereof, thus the loop mirror 35 is operated as a high-speed switch capable of selecting an optional pulse out of those of the compressed signals. A circulator 22 and an amplifier 23 are used for feedback and amplification of the pulse trains of signals which are not reversely compressed. Thus, the pulse trains of the compressed signals which inputted from an input end are passed through the SOA of the loop mirror 35 bit by bit and interfered with the output port of the loop mirror 35 so as to generate a phase change, and so that the pulse trains are reversely compressed and outputted from an output end.