scholarly journals Inverse design optimization for efficient coupling of an electrically injected optical antenna-LED to a single-mode waveguide

2019 ◽  
Vol 27 (14) ◽  
pp. 19802 ◽  
Author(s):  
Nicolas M. Andrade ◽  
Sean Hooten ◽  
Seth A. Fortuna ◽  
Kevin Han ◽  
Eli Yablonovitch ◽  
...  
Keyword(s):  
Design Optimization ◽  
Single Mode ◽  
Inverse Design ◽  
Optical Antenna ◽  
Single Mode Waveguide ◽  
Efficient Coupling

Efficient Coupling of an Optical Antenna-LED to a Single-Mode Waveguide

2020 ◽  
Author(s):  
Nicolas M. Andrade ◽  
Yunjo Kim ◽  
Sean Hooten ◽  
Eli Yablonovitch ◽  
Jeehwan Kim ◽  
...  
Keyword(s):  
Single Mode ◽  
Optical Antenna ◽  
Single Mode Waveguide ◽  
Efficient Coupling

Inverse Design for Single-Mode Waveguide Coupling of Electrically Injected Optical Antenna Based NanoLED

2018 ◽  
Author(s):  
Nicolas M. Andrade ◽  
Sean Hooten ◽  
Seth A. Fortuna ◽  
Kevin Han ◽  
Eli Yablonovitch ◽  
...  
Keyword(s):  
Single Mode ◽  
Inverse Design ◽  
Optical Antenna ◽  
Single Mode Waveguide ◽  
Waveguide Coupling

Efficient single-mode waveguide coupling of electrically injected optical antenna based nanoLED

2017 ◽  
Author(s):  
Nicolas M. Andrade ◽  
Seth A. Fortuna ◽  
Kevin Han ◽  
Sean Hooten ◽  
Eli Yablonovitch ◽  
...  
Keyword(s):  
Single Mode ◽  
Optical Antenna ◽  
Single Mode Waveguide ◽  
Waveguide Coupling

Design Optimization of Cryogenic Pump Inducer Considering Suction Performance and Cavitation Instability

2011 ◽  
Author(s):  
Hiroyoshi Watanabe ◽  
Hiroshi Tsukamoto
Keyword(s):  
Pressure Distribution ◽  
Design Optimization ◽  
Surface Pressure ◽  
Design Approach ◽  
Inverse Design ◽  
Blade Surface ◽  
Free Vortex ◽  
Surface Pressure Distribution ◽  
Cavitation Instability ◽  
Suction Performance

This paper presents the result of design optimization for three-bladed pump inducer using a three-dimensional (3-D) inverse design approach, Computational Fluid Dynamics (CFD) and DoE (Design of Experiments) taking suction performance and cavitation instability into consideration. The parameters to control streamwise blade loading distribution and spanwise work (free vortex or non-free vortex) for inducer were chosen as design optimization variables for the inverse design approach. Cavitating and non-cavitating performances for inducers designed using the design variables arranged in the DoE table were analyzed by steady CFD. Objective functions for non-cavitating operating conditions were the head and efficiency of inducers at a design flow (Qd), 80% Qd and 120% Qd. The volume of the inducer cavity region with a void ratio above 50% was selected as the objective function for inducer suction performance. In order to evaluate cavitation instability by steady CFD, the dispersion of the blade surface pressure distribution on each blade was selected as the evaluation parameter. This dispersion of the blade surface pressure distribution was caused by non-uniformity in the cavitation length that was developed on each inducer blade and increased when the cavitation number was reduced. The effective design parameters on suction performance and cavitation instability were confirmed by sensitivity analysis during the design optimization process. Inducers with specific characteristics (stable, unstable) designed using the effective parameters were evaluated through experiments.

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