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  • Optical Fiber Communication Conference and National Fiber Optic Engineers Conference
  • OSA Technical Digest (CD) (Optica Publishing Group, 2009),
  • paper OMI1
  • https://doi.org/10.1364/OFC.2009.OMI1

Photonic Analog-to-Digital Converters A Tutorial

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Each new bit of ADC resolution requires an increase in signal-to-noise-and-distortion ratio (SNDR) of 6 dB ENOB without noise bandwidth is meaningless Decreasing the noise bandwidth by a factor of 4 increases ADC resolution by 1 ENOB – e.g. the Tektronix 50 GS/s digital oscilloscope has 5 ENOB over 16 GHz 7 ENOB over 1 GHz Every time you sneeze, you lose a few 1/10’s of an ENOB Optical photons are very energetic compared to RF photons – Shot noise is irrelevant for electronic ADCsShot noise is a fundamental limit in photonic ADCs Photonic ADCs usually contain a microwave photonic link – Standard analysis gives the SNR/CNRMax ENOB over a given noise bandwidth readily estimated If commercialized, photonic ADCs will resemble data conversion modules and digital oscilloscopes rather than single chip ADCs

© 2009 Optical Society of America

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