Title :
High-linearity 208-MS/s photonic analog-to-digital converter using 1-to-4 optical time-division demultiplexers
Author :
Twichell, Jonathan C. ; Wasserman, Jeffrey L. ; Juodawlkis, Paul W. ; Betts, Gary E. ; Williamson, Richard C.
Author_Institution :
Lincoln Lab., MIT, Lexington, MA, USA
fDate :
7/1/2001 12:00:00 AM
Abstract :
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.
Keywords :
analogue-digital conversion; demultiplexing equipment; electro-optical modulation; integrated optics; interleaved codes; optical crosstalk; phase coding; time division multiplexing; 1-to-4 optical time-division demultiplexers; LiNbO/sub 3/; LiNbO/sub 3/ 1-to-4 optical time-division demultiplexers; channel extinction; electronic quantizers; high-linearity; overall spur-free dynamic range; phase-encoded optical sampling; photonic analog-to-digital converter; photonic integrate-and-reset circuits; ps sampling pulses; temporal crosstalk; two-tone third-order intermodulation-free dynamic range; Analog-digital conversion; High speed optical techniques; Optical arrays; Optical crosstalk; Optical distortion; Optical interferometry; Optical pulses; Optical receivers; Optical saturation; Sampling methods;
Journal_Title :
Photonics Technology Letters, IEEE
