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Energy efficient and energy proportional optical interconnects for multi-core processors: Driving the need for on-chip sources
- IEEE JSTQE
, 2014
"... Abstract—Silicon photonics is the prime candidate technology to realize an optical network-on-chip for global interconnects in future multi-core processors. Since silicon photonics lacks efficient native-substrate optical sources, the question is whether off-chip or heterogeneously integrated on-chi ..."
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Cited by 8 (2 self)
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Abstract—Silicon photonics is the prime candidate technology to realize an optical network-on-chip for global interconnects in future multi-core processors. Since silicon photonics lacks efficient native-substrate optical sources, the question is whether off-chip or heterogeneously integrated on-chip sources are the preferred technology. In this paper we argue, based on arguments of energy efficiency and energy proportionality, that on-chip sources provide a dramatic overall system efficiency improvement, as compared to using an off-chip (comb) source. We estimate an increase in source efficiency for on-chip lasers of close to 20 dB. These results provide a clear case to include on-chip lasers, such as hybrid silicon lasers, into the network architecture design. Index Terms—Integrated optoelectronics, hybrid silicon plat-form, optoelectronic devices, semiconductor lasers, silicon-on-insulator (SOI) technology, optical interconnections, network on
Silicon photonics for exascale systems
- J. Lightw. Technol
"... Abstract—With the extraordinary growth in parallelism at all system scales driven by multicore architectures, computing per-formance is increasingly determined by how efficiently high-bandwidth data is communicated among the numerous compute resources. High-performance systems are especially challen ..."
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Cited by 6 (5 self)
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Abstract—With the extraordinary growth in parallelism at all system scales driven by multicore architectures, computing per-formance is increasingly determined by how efficiently high-bandwidth data is communicated among the numerous compute resources. High-performance systems are especially challenged by the growing energy costs dominated by data movement. As future computing systems aim to realize the Exascale regime— surpassing 1018 operations per second—achieving energy efficient high-bandwidth communication becomes paramount to scaled per-formance. Silicon photonics offers the possibility of delivering the needed communication bandwidths to match the growing comput-ing powers of these highly parallel architectures with extremely scalable energy efficiency. However, the insertion of photonic in-terconnects is not a one-for-one replacement. The lack of practical buffering and the fundamental circuit switched nature of opti-cal data communications require a holistic approach to designing system-wide photonic interconnection networks. New network ar-chitectures are required and must include arbitration strategies that incorporate the characteristics of the optical physical layer. This paper reviews the recent progresses in silicon photonic based interconnect devices along with the system level requirements for Exascale. We present a co-design approach for building silicon photonic interconnection networks that leverages the unique opti-cal data movement capabilities and offers a path toward realizing future Exascale systems. Index Terms—Exascale high performance computing, intercon-nection networks silicon photonics, optical interconnects. I.
Harmonically mode-locked hybrid silicon laser with intra-cavity filter to suppress supermode noise
- IEEE Journal
, 2011
"... Abstract—We present results from two hybrid silicon mode-locked lasers, each with a 2 GHz cavity and one with an intra-cavity ring resonator filter. We compare the performance of the two lasers with respect to the harmonic mode-locking behavior at 20 GHz, i.e., the tenth harmonic. The filter based l ..."
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Cited by 1 (1 self)
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Abstract—We present results from two hybrid silicon mode-locked lasers, each with a 2 GHz cavity and one with an intra-cavity ring resonator filter. We compare the performance of the two lasers with respect to the harmonic mode-locking behavior at 20 GHz, i.e., the tenth harmonic. The filter based laser design passively mode-locked at 20 GHz with an electrical spur mode sup-pression>45 dB. Furthermore, an optical supermode suppression of 55 dB and an RF linewidth of 52 kHz was also observed. Hybrid mode-locking the laser without the filter required 10 dBm input microwave power for 25 dB (electrical) spur mode suppression as opposed to the design with the filter showing>45 dB suppression at 0 dBm input power. Index Terms—Optoelectronic devices, mode-locked lasers, semi-conductor lasers. I.
Review III-V-on-Silicon Photonic Devices for Optical Communication and Sensing
"... photonics ..."
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10.1109/JSTQE.2013.2291624, IEEE Journal of Selected Topics in Quantum Electronics> REPLACE THIS LINE WITH YOUR PAPER IDENTIFICATION NUMBER (DOUBLE-CLICK HERE TO EDIT) <
"... Abstract—We present results from two hybrid silicon mode-locked lasers, each with a 2 GHz cavity and one with an intra-cavity ring resonator filter. We compare the performance of the two lasers with respect to the harmonic mode-locking behavior at 20 GHz i.e. the tenth harmonic. The filter based las ..."
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Abstract—We present results from two hybrid silicon mode-locked lasers, each with a 2 GHz cavity and one with an intra-cavity ring resonator filter. We compare the performance of the two lasers with respect to the harmonic mode-locking behavior at 20 GHz i.e. the tenth harmonic. The filter based laser design passively mode-locked at 20 GHz with an electrical spur mode suppression>45 dB. Furthermore, an optical supermode suppression of 55 dB and an RF linewidth of 52 kHz was also observed. Hybrid mode-locking the laser without the filter required 10 dBm input microwave power for 25 dB (electrical) spur mode suppression as opposed to the design with the filter showing>45 dB suppression at 0 dBm input power. Index Terms — Optoelectronic devices, mode-locked lasers,
Review Article Hybrid Materials for Integrated Photonics
"... Copyright © 2014 Paolo Bettotti.This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. In this review materials and technologies of the hybr ..."
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Copyright © 2014 Paolo Bettotti.This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. In this review materials and technologies of the hybrid approach to integrated photonics (IP) are addressed. IP is nowadays a mature technology and is the most promising candidate to overcome the main limitations that electronics is facing due to the extreme level of integration it has achieved. IP will be based on silicon photonics in order to exploit the CMOS compatibility and the large infrastructures already available for the fabrication of devices. But silicon has severe limits especially concerning the development of active photonics: its low efficiency in photons emission and the limited capability to be used as modulator require finding suitable materials able to fulfill these fundamental tasks. Furthermore there is the need to define standardized processes to render these materials compatible with the CMOS process and to fully exploit their capabilities. This review describes the most promising materials and technological approaches that are either currently implemented or may be used in the coming future to develop next generations of hybrid IP devices. 1.
Technology for Multispectral Infrared Laser Integration on Silicon
"... Abstract — We propose an integrated silicon photonic multispectral infrared platform for combining laser power spanning the ultraviolet to the mid-wave infrared from hybrid silicon III-V lasers by spectral beam combining with a novel ultra-broadband combiner. Keywords- hybrid silicon laser, interban ..."
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Abstract — We propose an integrated silicon photonic multispectral infrared platform for combining laser power spanning the ultraviolet to the mid-wave infrared from hybrid silicon III-V lasers by spectral beam combining with a novel ultra-broadband combiner. Keywords- hybrid silicon laser, interband cascade laser, multispectral infrared, quantum dot laser, silicon photonics I.
to Sense Strain and Ultrasound
"... Silicon photonic micro-ring resonators to sense strain and ultrasound ..."
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Article Integrated Microwave Photonic Isolators: Theory, Experimental Realization and Application in a Unidirectional Ring Mode-Locked Laser Diode
"... www.mdpi.com/journal/photonics ..."
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