| 摘要 |
Disclosed herein is a method and a system for comparing a first optical signal and a second optical signal. The method comprises the step of generating a first copied signal that is a copy of the first optical signal centred at an optical frequency, and generating a second copied signal that is a copy of the second optical signal centred at the optical frequency, the first copied signal being &pgr; radians out of phase to the second copied signal. The method further comprises the step of interfering the first copied signal and the second copied signal to generate an optical comparison signal. Generating the copied signals may comprise coupling via a nonlinear wave mixing process the optical signals to stimulating optical waves. |
