Method and device for generation of phase conjugate light and wavelength conversion, and system having the device
 Methods and devices for generation of phase conjugate light and wavelength conversion, and systems each having the device. In a basic structure of the present invention, a signal light beam is first separated into first and second polarization components by a polarization beam splitter. The first and second polarization components are next converted into first and second phase conjugate light beams by a single DFB (distributed feed-back) laser diode or two DFB laser diodes. In the case that a single DFB laser diode is used, the first and second phase conjugate light beams are combined by the above-mentioned polarization beam splitter. In the case that two DFB laser diodes are used, the first and second phase conjugate light beams are combined by an another polarization beam splitter. Through the structure, it can be possible to provide a phase conjugate light generator having no polarization dependence of conversion efficiency. 
Fujitsu Limited
G H H G H
G02F H04B H01S G02F H01S
additional inventional additional additional inventional
Shigeki
Watanabe