Patent ID: 6996138
Filing Date: 2006-02-07
Classification: H01S,H04B,H04J

Abstract:
1. A Fabry-Perot (FP) laser apparatus mode-locked to a multi-frequency lasing light source as a light source for Wavelength Division Multiplexing WDM-based optical communications, comprising: an optical amplifier that amplifies inputted optical signals; a laser light source that wavelength division demultiplexes a first part of the inputted optical signals, multiplexes the demultiplexed optical signals, re-transmits the multiplexed optical signals, wavelength division demultiplexes the remaining part of the amplified optical signals, and outputs signals mode-locked to the demultiplexed signals; and a first circulator that inputs the remaining part of the amplified optical signals into the laser light source, and outputs, to an optical transmission link, optical signals mode-locked to the multi-frequency lasing light source outputted from the laser light source.