Patent ID: 6292602
Filing Date: 2001-09-18
Classification: H04B,H04J

Abstract:
An optical signal transmission system, comprising:first and second optical signal transmission devices connected to each other through an optical transmission path, the first optical signal transmission device generating first and second phase conjugation lights having first and fourth optical wavelengths, respectively, which are different from each other, the first and second phase conjugation lights being generated by a main signal light having a third optical wavelength and an exciting light having a second optical wavelength, the second phase conjugation light having the fourth optical wavelength being intensity modulated with a sub-signal having a speed slower than that of the main signal light, the first optical transmission device concurrently transmitting the first phase conjugation light and the second phase conjugation light, of which the intensity has been modulated by the sub-signal, through the optical transmission path; andthe second optical signal transmission device receiving the first phase conjugation light and the second phase conjugation light intensity modulated with the sub-signal, through the optical transmission path, the second optical signal transmission device wavelength demultiplexing the received first and second phase conjugation lights and obtaining the main and sub-signals.