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Ali R. Motamedi
Researcher at Massachusetts Institute of Technology
Publications - 13
Citations - 757
Ali R. Motamedi is an academic researcher from Massachusetts Institute of Technology. The author has contributed to research in topics: Femtosecond & Jitter. The author has an hindex of 7, co-authored 12 publications receiving 656 citations.
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Journal ArticleDOI
Photonic ADC: overcoming the bottleneck of electronic jitter.
Anatol Khilo,Steven J. Spector,Matthew E. Grein,Amir H. Nejadmalayeri,C.W. Holzwarth,Michelle Y. Sander,Marcus S. Dahlem,Michael Y. Peng,Michael W. Geis,Nicole DiLello,Jung U. Yoon,Ali R. Motamedi,Jason S. Orcutt,J. P. Wang,Cheryl Sorace-Agaskar,Milos A. Popovic,Jie Sun,G.-R. Zhou,Hyunil Byun,Jian Chen,Judy L. Hoyt,Henry I. Smith,Rajeev J. Ram,Michael H. Perrott,Theodore M. Lyszczarz,Erich P. Ippen,Franz X. Kärtner +26 more
TL;DR: 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, a 4-5 times improvement over the performance of the best electronic ADCs which exist today.
Proceedings ArticleDOI
Optical arbitrary waveform generation
Erich P. Ippen,Andrew Benedick,Jonathan R. Birge,Hyunil Byun,Li-Jin Chen,Guoqing Chang,David M. Chao,Jonathan L. Morse,Ali R. Motamedi,Michelle Y. Sander,Gale S. Petrich,Leslie A. Kolodziejski,Franz X. Kärtner +12 more
TL;DR: In this paper, the authors describe advances in technology for optical arbitrary waveform generation and present a model-knocked Ti:sapphire and erbium-fiber laser.
Journal ArticleDOI
Compact, stable 1 GHz femtosecond Er-doped fiber lasers.
Hyunil Byun,Michelle Y. Sander,Ali R. Motamedi,H.M. Shen,Gale S. Petrich,Leslie A. Kolodziejski,Erich P. Ippen,Franz X. Kärtner +7 more
TL;DR: In this paper, the authors demonstrate a high-repetition-rate soliton fiber laser that is based on highly doped anomalously dispersive erbium-doped fiber.
Journal ArticleDOI
Ultrafast nonlinear optical studies of silicon nanowaveguides.
TL;DR: Results of a self-consistent ultrafast study of nonlinear optical properties of silicon nanowaveguides using heterodyne pump-probe technique are reported.
Proceedings ArticleDOI
Photonic analog-to-digital conversion with electronic-photonic integrated circuits
Franz X. Kärtner,R. Amatya,Mohammad Araghchini,Jonathan R. Birge,Hyunil Byun,J. Chen,Marcus S. Dahlem,Nicole DiLello,Fuwan Gan,C.W. Holzwarth,Judy L. Hoyt,Erich P. Ippen,Anatol Khilo,Jungwon Kim,Minsoo Kim,Ali R. Motamedi,Jason S. Orcutt,M. Park,Michael H. Perrott,Milos A. Popovic,Rajeev J. Ram,Henry I. Smith,G.-R. Zhou,Steven J. Spector,Theodore M. Lyszczarz,Michael W. Geis,D. M. Lennon,J. U. Yoon,Matthew E. Grein,R. T. Schulein +29 more
TL;DR: In this article, the authors discuss and demonstrate strategies and devices that enable the implementation of photonic analog-to-digital conversion (ADC) systems with emerging electronic-photonic integrated circuits based on silicon photonics, including Si-Modulators with up to 20 GHz modulation speed, 20 channel SiN-filter banks, and Ge-photodetectors.