N*N passive fiber star coupler using grating degeneration and sandwich structures

Author

Yun, G. ; Kavehrad, M.

Author_Institution

Dept. of Electr. Eng., Ottawa Univ., Ont., Canada

Volume

4

Issue

9

fYear

1992

Firstpage

1035

Lastpage

1037

Abstract

Designs for an efficient N*N passive integrated optical star coupler are proposed. The concepts of grating degeneration and sandwich structures are presented as solutions to the dynamic range limitation problem encountered by holographic fiber star couplers. The techniques and their combinations can significantly reduce the number of gratings required by the coupler. For instance, the number of superimposed gratings is decreased from 120 to no more than 4 for a 16*16 coupler. This reduction makes it possible to build holographic N*N star couplers with recording materials of a moderate modulation index.<>

Keywords

holographic gratings; integrated optics; optical couplers; optical fibres; 16 by 16 coupler; N*N passive fiber star coupler; designs; dynamic range limitation; grating degeneration; holographic fiber star couplers; holographic volume gratings; integrated optical star coupler; modulation index; recording materials; sandwich structures; Dynamic range; Fiber gratings; Holographic optical components; Holography; Integrated optics; Modulation; Optical coupling; Optical design; Optical fiber couplers; Sandwich structures;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/68.157140

Filename

157140