Bistable Diode Laser Amplifiers In High Performance Optical Communication And Optical Computing Systems

1988 ◽  
Author(s):  
Mario Dagenais ◽  
Wayne F. Sharfin
Keyword(s):  
Diode Laser ◽  
Optical Communication ◽  
High Performance ◽  
Optical Computing ◽  
Computing Systems ◽  
Laser Amplifiers

Bistable Diode Laser Amplifiers In Optical Computing

1986 ◽  
Author(s):  
Mario Dagenais ◽  
Wayne F. Sharfin
Keyword(s):  
Diode Laser ◽  
Optical Computing ◽  
Laser Amplifiers

Simulation of Ultrashort Pulse Shaping Filter Based on Multilayer Volume Holographic Gratings

2011 ◽  
Vol 383-390 ◽  
pp. 6953-6958
Author(s):  
Li Ping Guo ◽  
Ai Min Yan ◽  
Sheng Gui Fu ◽  
Xiao Juan Liu
Keyword(s):  
Optical Communication ◽  
Pulse Shaping ◽  
Optical Pulse ◽  
Optical Filter ◽  
Optical Computing ◽  
Wave Theory ◽  
Bragg Diffraction ◽  
Computing Systems ◽  
Holographic Gratings ◽  
Shaping Filter

Shaping and filtering of ultrashort pulsed beam at 1.06um by using multilayer volume holographic gratings (MVHGs) is analyzed. The modified multilayer coupled wave theory used to analyze the Bragg diffraction of a system of MVHG is derived. The spectral intensity distributions of the diffracted beam are calculated. The diffraction bandwidth, diffraction pulse duration and the total diffraction efficiency of the filter are also analyzed. Control of the optical pulse shape is accomplished by adjusting the width of the intermediate layer of an optical filter of MVHGs. This pulse shaping technique will be useful in the optical communication and optical computing systems.

GPU-accelerated molecular dynamics: State-of-art software performance and porting from Nvidia CUDA to AMD HIP

2021 ◽  
pp. 109434202110082
Author(s):  
Nikolay Kondratyuk ◽  
Vsevolod Nikolskiy ◽  
Daniil Pavlov ◽  
Vladimir Stegailov
Keyword(s):  
Molecular Dynamics ◽  
High Performance ◽  
Software Performance ◽  
Computing Systems ◽  
Accelerated Molecular Dynamics ◽  
Nvidia Cuda ◽  
Software And Hardware ◽  
Management Capabilities ◽  
Utilization Time ◽  
Performance Computing

Classical molecular dynamics (MD) calculations represent a significant part of the utilization time of high-performance computing systems. As usual, the efficiency of such calculations is based on an interplay of software and hardware that are nowadays moving to hybrid GPU-based technologies. Several well-developed open-source MD codes focused on GPUs differ both in their data management capabilities and in performance. In this work, we analyze the performance of LAMMPS, GROMACS and OpenMM MD packages with different GPU backends on Nvidia Volta and AMD Vega20 GPUs. We consider the efficiency of solving two identical MD models (generic for material science and biomolecular studies) using different software and hardware combinations. We describe our experience in porting the CUDA backend of LAMMPS to ROCm HIP that shows considerable benefits for AMD GPUs comparatively to the OpenCL backend.

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