Title :
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
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;
Journal_Title :
Photonics Technology Letters, IEEE
