Optimization of finite-length input volume holographic grating couplers illuminated by finite-width incident beams

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Please use this identifier to cite or link to this item: http://hdl.handle.net/1853/45420

Title: Optimization of finite-length input volume holographic grating couplers illuminated by finite-width incident beams
Author: Wu, Shun-Der ; Glytsis, Elias N. ; Gaylord, Thomas K.
Abstract: A finite volume holographic grating coupler (VHGC) normally illuminated with various incident-beam profiles (such as a Gaussian beam, a flat cosine-squared beam, and an exponential-decay beam) with finite beam widths for input coupling is rigorously analyzed by use of the finite-difference frequency-domain method. The effects of the incident-beam width, the incident-beam position, the incident-beam profile, and the incident-beam angle of incidence on the input coupling efficiency are investigated. The optimum conditions for input coupling are determined. Both a VHGC embedded in the waveguide film region and a VHGC placed in the waveguide cover region are investigated. For a given finite VHGC, the input coupling efficiencies are strongly dependent on incident-beam widths, incident-beam positions, and incident-beam angles of incidence, but are only weakly dependent on incident-beam profiles.
Description: © 2005 Optical Society of America. The definitive version of this paper is available at: http://dx.doi.org/10.1364/AO.44.004435 DOI: 10.1364/AO.44.004435
Type: Article
URI: http://hdl.handle.net/1853/45420
ISSN: 0003-6935
Citation: Wu, SD and Glytsis, EN and Gaylord, Thomas K., "Optimization of finite-length input volume holographic grating couplers illuminated by finite-width incident beams," Applied Optics, 44, 21, 4435-4446 (July 20 2005)
Date: 2005-07
Contributor: Georgia Institute of Technology. Center for Organic Photonics and Electronics
Georgia Institute of Technology. School of Electrical and Computer Engineering
Ethniko Metsovio Polytechneio (Greece)
Publisher: Georgia Institute of Technology
Optical Society of America
Subject: Diffraction gratings
Diffraction theory
Volume gratings
Physical optics
Electromagnetic optics

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