Journal
IEEE PHOTONICS TECHNOLOGY LETTERS
Volume 14, Issue 5, Pages 684-686Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/68.998725
Keywords
ADC; analog-to-digital conversion; digital receiver; optical signal processing; time stretch
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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 band-width, the SNR is limited by the amplified spontaneous emission beat noise.
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