Patent ID: 6954559
Filing Date: 2005-10-11
Classification: H04B

Abstract:
1. A re-generator of an optical clock signal comprising a mode-locked semiconductor laser which puts out a regenerated optical clock signal from one end face of the mode-locked semiconductor laser when light signals each of which have the same polarized wave state are inputted at both end faces of the mode-locked semiconductor laser, wherein the re-generator further comprises: a light splitter to split a light signal into two polarized signals with respective polarizations different by a right angle, and to put out one of the polarized signals split from the light signal to one of the end faces of the mode-locked semiconductor laser; and a rotator to rotate the other of the polarized signals by a right angle, and to lead the rotated other of the polarized signals to the other of the end faces of the mode-locked semiconductor laser.