Title :
4×2.5 GHz repetitive photonic sampler for high-speed analog-to-digital signal conversion
Author :
Fok, M.P. ; Lee, K.L. ; Shu, C.
Author_Institution :
Dept. of Electron. Eng., Chinese Univ. of Hong Kong, China
fDate :
3/1/2004 12:00:00 AM
Abstract :
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.
Keywords :
analogue-digital conversion; microwave photonics; photodetectors; semiconductor lasers; signal sampling; 2.4 GHz; 2.5 GHz; ADC system; distortion ratio; dynamic range; four-wavelength picosecond pulsed source; lasing-to-nonlasing modes suppression ratio; photonic analog-to-digital converter; radio-frequency signal; repetitive photonic sampler; signal-to-noise ratio; Analog-digital conversion; Diode lasers; High speed optical techniques; Optical distortion; Optical fiber polarization; Optical pulse generation; Optical pulses; Pulse modulation; Sampling methods; Signal sampling;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2004.823696
