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4×2.5 GHz repetitive photonic sampler for high-speed analog-to-digital signal conversion

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3 Author(s)
Fok, M.P. ; Dept. of Electron. Eng., Chinese Univ. of Hong Kong, China ; Lee, K.L. ; Shu, C.

This letter presents a 10-gigasample/s (GS/s) photonic analog-to-digital converter (ADC) system constructed using a four-wavelength picosecond pulsed source. The lasing-to-nonlasing modes suppression ratio of the optical source is over 24 dB. By using the 10-GHz optical source, a 10-GS/s photonic ADC has been demonstrated and was used to sample an arbitrary radio-frequency signal. The system was further investigated by sampling a 2.4-GHz sinusoidal signal. Important parameters including the signal-to-noise and distortion ratio and the spurious-free dynamic range have been determined.

Published in:

Photonics Technology Letters, IEEE  (Volume:16 ,  Issue: 3 )