Optical signal regenerative repeater, optical gate control method, and optical signal regeneration method

An optical gate control method comprising:

• supplying to a nonlinear optical phase shifter controlled light having a first pulse time width;
• and
• supplying to said nonlinear optical phase shifter control light having a second pulse time width to generate a nonlinear optical phase shift in a pulse of said controlled light,
• wherein said first pulse time width and said second pulse time widths are different.

An optical signal regeneration method comprising:

• receiving an optical communication signal pulse;
• extracting a clock from said optical communication signal pulse and generating a first optical clock pulse synchronized with said extracted clock;
• supplying said optical communication signal pulse as a control light to a first optical gate to open or close said first optical gate;
• supplying said first optical clock pulse as a controlled light to said first optical gate;
• and
• employing said controlled light to obtain a first regenerated signal pulse corresponding to said optical communication signal pulse according to opening or closing of said first optical gate,
• wherein a pulse time width of said control light and said controlled light is different.