Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Design of a high-efficiency volume grating coupler for line focusing

Not Accessible

Your library or personal account may give you access

Abstract

A volume grating for outcoupling and line focusing of waveguided infrared light is designed and optimized. A local grating vector approach is used in combination with the rigorous coupled-wave analysis. By design, this volume grating coupler is holographically constructed on top of a waveguide by the interference of two coherent 364-nm ultraviolet waves formed with two aberration-optimized cylindrical lenses. This focusing coupler exhibits preferential-order coupling (92.9%) into the cover as well as very low focal intensity side lobes. This is accomplished through a chirped, slanted-fringe volume grating with a designed spatial variation in the attenuation coefficient (describing the outcoupling of the guided mode) along the length of the grating. This is achieved by a specific variation in the grating slant angle along the grating length. By design, the 1000-μm-length coupler focuses an 850-nm infrared guided wave to a line with an intensity FWHM of 3.32 μm and a 90% power width of 5.53 μm at a focal distance of 4 mm directly above the grating. Its performance is compared with that of a corresponding electron-beam-written surface-relief coupler design.

© 1998 Optical Society of America

Full Article  |  PDF Article
More Like This
Design, fabrication, and performance of preferential-order volume grating waveguide couplers

Stephen M. Schultz, Elias N. Glytsis, and Thomas K. Gaylord
Appl. Opt. 39(8) 1223-1232 (2000)

Volume grating preferential-order focusing waveguide coupler

Stephen M. Schultz, Elias N. Glytsis, and Thomas K. Gaylord
Opt. Lett. 24(23) 1708-1710 (1999)

Preferential-order waveguide grating couplers: a comparative rigorous analysis using the finite-difference time-domain method

Aristeides D. Papadopoulos and Elias N. Glytsis
Appl. Opt. 49(30) 5787-5798 (2010)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (11)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (3)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (13)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved