| 摘要 |
An optical demultiplexer includes a first optical path that includes a first nonlinear optical element (NLE) which responds to a control pulse to induce a 180 DEG phase shift in an optical data signal propagating therethrough. The NLE responds rapidly to the control pulse but slowly reverts to a non-phase shift state. A second optical path is provided which includes a second NLE. An optical output coupler is connected to the first and second optical paths and responds to in-phase data pulses therefrom to output a data pulse on a first output. The optical output coupler is responsive to 180 DEG phase shifted data pulses to output a corresponding data pulse on a second output. An input data source concurrently couples a train of optical data pulses of wavelength lambda onto the first optical path and the second optical path. A control input induces a first control pulse of wavelength lambda onto the first optical path and a second control pulse of wavelength lambda onto the second optical path, the second control pulse delayed a time t from the first control pulse, whereby a data pulse occurring during time t, is phase delayed by 180 degrees by the first NLE but is not affected by an additional phase delay in the second NLE during time t. |
