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In this letter, we report the experimental demonstration of a 40 GSample/s all-optical analog to digital converter (ADC). The proposed all-optical ADC consists of optical quantization and coding processes based on intensity-to-wavelength conversion by soliton self-frequency shift with an optical sampling process using an ultrastable optical pulse train. A 5-GHz sinusoidal analog input signal was successfully...
Power-efficient, flexible, Nyquist 4.88-ps sinc-pulses generation and OTDM multiplexing is demonstrated, using fractional Fourier transform subcarriers and time-lens effect. OTDM users are generated and multiplexed by a WSS, without rectangular spectral shaping.
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