A design consideration for optical power dividers composed of three coupled waveguides

Creators Hotta Masashi

Creators Geshiro Masahiro

Creators Arashiba Tomoyuki

Creators Sawa Shinnosuke

In the present paper, we propose a design consideration for optical power dividers utilizing the distributed coupling among three adjacent slab waveguides. This type of power divider can easily be fabricated by means of the process of ion-exchange. However, being large in scale is a serious problem. We clarify that the size of the device can be remarkably reduced by introducing nonuniformly distributed coupling which is caused by step-like gap variations between the waveguides. In order to obtain wide separations at the output end, we also introduce the low-loss bent structure which is designed by the method of suppression of the optical wave undulation along the waveguide. The numerical results show that low-loss wide separations of optical waves are possible and over a 35% reduction in device length can be achieved. The numerical analysis is based on the two-dimensional finite difference method.

Copyright c [1994] IEEE.. Reprinted from IEEE transactions on microwave theory and techniques, vol. 42-7(1-2), 1994, 1167-1171. This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of Yamaguchi University Library's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.()

[ISSN]0018-9480

[NCID]AA00667977

info:doi/10.1109/22.299752