TY  - JOUR
AU  - Khilo, A.
AU  - Spector, S. J.
AU  - Grein, M. E.
AU  - Nejadmalayeri, A. H.
AU  - Holzwarth, C. W.
AU  - Sander, M. Y.
AU  - Dahlem, M. S.
AU  - Peng, M. Y.
AU  - Geis, M. W.
AU  - Dilello, N. A.
AU  - Yoon, J. U.
AU  - Motamedi, A.
AU  - Orcutt, J. S.
AU  - Wang, J. P.
AU  - Sorace-Agaskar, C. M.
AU  - Popovi\'c, M. A.
AU  - Sun, J.
AU  - Zhou, G.-R.
AU  - Byun, H.
AU  - Chen, J.
AU  - Hoyt, J. L.
AU  - Smith, H. I.
AU  - Ram, R. J.
AU  - Perrott, M.
AU  - Lyszczarz, T. M.
AU  - Ippen, E. P.
AU  - Kärtner, F. X.
AU  - DESY
TI  - Photonic ADC: overcoming the bottleneck of electronic jitter
JO  - Optics express
VL  - 20
SN  - 1094-4087
CY  - Washington, DC
PB  - Soc.
M1  - PHPPUBDB-25804
SP  - 4454
PY  - 2012
AB  - Accurate conversion of wideband multi-GHz analog signals into the digital domain has long been a target of analog-to-digital converter (ADC) developers, driven by applications in radar systems, software radio, medical imaging, and communication systems. Aperture jitter has been a major bottleneck on the way towards higher speeds and better accuracy. Photonic ADCs, which perform sampling using ultra-stable optical pulse trains generated by mode-locked lasers, have been investigated for many years as a promising approach to overcome the jitter problem and bring ADC performance to new levels. This work demonstrates that the photonic approach can deliver on its promise by digitizing a 41 GHz signal with 7.0 effective bits using a photonic ADC built from discrete components. This accuracy corresponds to a timing jitter of 15 fs - a 4-5 times improvement over the performance of the best electronic ADCs which exist today. On the way towards an integrated photonic ADC, a silicon photonic chip with core photonic components was fabricated and used to digitize a 10 GHz signal with 3.5 effective bits. In these experiments, two wavelength channels were implemented, providing the overall sampling rate of 2.1 GSa/s. To show that photonic ADCs with larger channel counts are possible, a dual 20-channel silicon filter bank has been demonstrated.
LB  - PUB:(DE-HGF)16
C6  - pmid:22418205
UR  - <Go to ISI:>//WOS:000301041900111
DO  - DOI:10.1364/OE.20.004454
UR  - https://bib-pubdb1.desy.de/record/144108
ER  -