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A phase-shifted photonic analog-to-digital conversion system is experimentally demonstrated with 40 GS/S sampling rate. A 2.5 GHz sinusoid signal is quantized and the effective number of bits of 3.41 is obtained.
All-optical analog-to-digital conversion utilizing inherent multiwavelength phase shift in lithium niobate phase modulator is proposed. In the experimental demonstration, a wavelength-tunable continuous-wave laser diode and a lithium niobate phase modulator are used to quantize the sinusoidal tone electrical analog signal. Using 16 different wavelengths, an effective number of bits of 4.3-bit has...
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