A
Aditya Kakkar
Researcher at Royal Institute of Technology
Publications - 39
Citations - 614
Aditya Kakkar is an academic researcher from Royal Institute of Technology. The author has contributed to research in topics: Phase noise & Quadrature amplitude modulation. The author has an hindex of 12, co-authored 35 publications receiving 402 citations.
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Journal ArticleDOI
800G DSP ASIC Design Using Probabilistic Shaping and Digital Sub-Carrier Multiplexing
Han Sun,Mehdi Torbatian,Mehdi Karimi,Robert Maher,Sandy Thomson,Mohsen Nader Tehrani,Yuliang Gao,Ales Kumpera,George Soliman,Aditya Kakkar,Mohammad Osman,Ziad A. El-Sahn,Clayton Doggart,Weikun Hou,Shailesh Sutarwala,Yuejian Wu,Mohammad Reza Chitgarha,Vikrant Lal,Huan-Shang Tsai,Scott Corzine,Jiaming Zhang,J. Osenbach,S. Buggaveeti,Zulfikar Morbi,Miguel Iglesias Olmedo,I. Leung,Xian Xu,Parmijit Samra,Vince Dominic,Steve Sanders,Mehrdad Ziari,Antonio Napoli,Bernhard Spinnler,Kuang-Tsan Wu,Parthiban Kandappan +34 more
TL;DR: This manuscript discusses the motivations for jointly utilizing transmission techniques such as probabilistic shaping and digital sub-carrier multiplexing in digital coherent optical transmissions systems and describes the key-building blocks of modern high-speed DSP-based transponders working at up to 800G per wave.
Journal ArticleDOI
100 GHz Externally Modulated Laser for Optical Interconnects
Oskars Ozolins,Xiaodan Pang,Miguel Iglesias Olmedo,Aditya Kakkar,Aleksejs Udalcovs,Simone Gaiarin,Jaime Rodrigo Navarro,Klaus M. Engenhardt,Tadeusz Asyngier,Richard Schatz,Jie Li,Fredrik Nordwall,Urban Westergren,Darko Zibar,Sergei Popov,Gunnar Jacobsen +15 more
TL;DR: In this article, a 116 Gb/s on-off keying (OOK), four PAM and 8 PAM optical transmitter using an InP-based integrated and packaged externally modulated laser for high-speed optical interconnects with up to 30dB static extinction ratio and over 100-GHz 3dB bandwidth with 2 dB ripple.
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Gigabit free-space multi-level signal transmission with a mid-infrared quantum cascade laser operating at room temperature
Xiaodan Pang,Oskars Ozolins,Richard Schatz,Joakim Storck,Aleksejs Udalcovs,Jaime Rodrigo Navarro,Aditya Kakkar,Gregory Maisons,Mathieu Carras,Gunnar Jacobsen,Sergei Popov,Sebastian Lourdudoss +11 more
TL;DR: Gigabit free-space transmissions are experimentally demonstrated with a quantum cascaded laser emitting at mid-wavelength infrared of 4.65 μm, and a commercial infrared photovoltaic detector, and the proposed transmission link shows a stable operational performance in the lab environment.
Journal ArticleDOI
Comprehensive Study of Equalization-Enhanced Phase Noise in Coherent Optical Systems
Aditya Kakkar,Jaime Rodrigo Navarro,Richard Schatz,Hadrien Louchet,Xiaodan Pang,Oskars Ozolins,Gunnar Jacobsen,Sergei Popov +7 more
TL;DR: A thorough analysis of equalization-enhanced phase noise (EEPN) and its impact on the coherent optical system is presented and it is shown that in coherent optical systems utilizing electronic dispersion compensation, this noise corresponds to multipath fading in wireless communication systems.
Journal ArticleDOI
Laser Frequency Noise in Coherent Optical Systems: Spectral Regimes and Impairments.
Aditya Kakkar,Jaime Rodrigo Navarro,Richard Schatz,Xiaodan Pang,Oskars Ozolins,Aleksejs Udalcovs,Hadrien Louchet,Sergei Popov,Gunnar Jacobsen +8 more
TL;DR: It is established that different regimes of the laser FN-spectrum cause a different set of impairments, and the influence of the impairments due to some regimes can be reduced by optimizing the corresponding mitigation algorithms, while other regimes cause irretrievable impairments.