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Optical square QAM signal emulation using all-optical PAM to QAM signal conversion
Optical square QAM signal emulation using all-optical PAM to QAM signal conversion
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机译:使用全光PAM到QAM信号转换的光方QAM信号仿真
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摘要
An optical communication method includes converting an optical pulse amplitude modulation (PAM) signal to a square QAM signal using an optical delay interferometer (DI) to perform all-optical PAM to QAM conversion in the DI; performing optical de-correlation of I and Q tributaries of the QAM signal to avoid frequency dependent attenuation in RF cabling which impacts signal quality; and finding optimal phase control mechanism of the DI by monitoring and equalizing down-converted I and Q electrical signal amplitudes, using coherent detection; and emulating a square quadrature amplitude modulation (QAM) optical signal with duplicated data copies.
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