| 摘要 |
A novel semiconductor optical amplifier (SOA) can operate as an optical inverter as well as a power-restoring device. Together, an optical-OR and the optical inverter can provide a wide variety of high speed optical logic gates and functions. The optical inverter uses cross-gain modulation (XGM) to invert a modulated signal on a first input, to produce an inverted output. The inverse of the modulation is transferred from a first wavelength of the modulated first input to a second wavelength of a continuous-wave second input. A filter can then block the first wavelength, allowing the inversely-modulated second wavelength to be output as the inverted output. The first and second wavelengths are swapped in alternate inverters in a logic path. The Y-junction can be implemented as a Multi-Mode Interference (MMI) device.
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