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High-linearity 208-MS/s photonic analog-to-digital converter using 1-to-4 optical time-division demultiplexers

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5 Author(s)
Twichell, J.C. ; Lincoln Lab., MIT, Lexington, MA, USA ; Wasserman, J.L. ; Juodawlkis, P.W. ; Betts, G.
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This letter describes a demonstration of a photonic analog-to-digital converter operating at 208 MS/s and utilizing phase-encoded optical sampling to achieve an 87-dB two-tone third-order intermodulation-free dynamic range. A pair of LiNbO/sub 3/ 1-to-4 optical time-division demultiplexers with >35-dB channel extinction distribute the 30-ps sampling pulses to an array of photonic integrate-and-reset circuits followed by 12-b 52-MS/s electronic quantizers. Interleaving spurs due to temporal crosstalk currently limit the overall spur-free dynamic range to 65 dB.

Published in:

Photonics Technology Letters, IEEE  (Volume:13 ,  Issue: 7 )

Date of Publication:

July 2001

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