Title :
130-GSa/s photonic analog-to-digital converter with time stretch preprocessor
Author :
Bhushan, A.S. ; Kelkar, P.V. ; Jalali, B. ; Boyraz, O. ; Islam, M.
Author_Institution :
Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA
fDate :
5/1/2002 12:00:00 AM
Abstract :
In this letter, we demonstrate a photonic analog-to-digital converter with time stretch (TS) preprocessor that has a sampling rate of 130 GSa/s. The system has a signal-to-noise ratio (SNR) exceeding seven effective number of bits over a 1-GHz bandwidth at 18 GHz. We present an analytical model of the SNR in the TS preprocessor which shows that over the specified bandwidth, the SNR is limited by the amplified spontaneous emission beat noise.
Keywords :
analogue-digital conversion; chirp modulation; electro-optical modulation; laser noise; microwave photonics; optical receivers; signal sampling; superradiance; 1 GHz; 18 GHz; CNR degradation; amplified spontaneous emission beat noise; broadband optical pulses; digital receiver; optical signal processing; photonic analog-to-digital conversion; signal-to-noise ratio; supercontinuum source; time stretch preprocessor; time-limited waveform; Analog-digital conversion; Bandwidth; Fiber nonlinear optics; Nonlinear optics; Optical filters; Optical receivers; Optical signal processing; Sampling methods; Signal to noise ratio; Supercontinuum generation;
Journal_Title :
Photonics Technology Letters, IEEE
