Accession Number : ADA293249

Title :   A Study of End-Fire Coupling of Single-Mode Fiber to TI: LiNbO3 Single-Mode Planar Waveguide,

Corporate Author : NATIONAL AIR INTELLIGENCE CENTER WRIGHT-PATTERSON AFB OH

Personal Author(s) : Qinghua, Zhao ; Junjie, Gai ; Junqing, Fan ; Chengjie, Xu

PDF Url : ADA293249

Report Date : 06 MAR 1995

Pagination or Media Count : 15

Abstract : Most of the widely studied modulator, switch, spectrum analyzer in integrated optics use Ti-diffused LiNbO3 waveguides. Improving single-mode fiber to waveguide coupling efficiency and realizing the fixed connection between them is one of the most fundamental problems. In our experiment, a direct coupling of single-mode fiber to waveguide is used. The major limiting factor in coupling is the uneven profile of mode field of the single-mode fiber and waveguide, and the accuracy in transverse realignment between them. By using single-mode fiber microlens, the transverse field can be evenly adjusted. By using 2-D etched silicone V groove as a micromodulator, the alignment accuracy between them can be fine tuned. The maximum value for the coupling is measured at 64%, and the coupling has also been found very stable. (MM)

Descriptors :   *OPTICAL WAVEGUIDES, *LIGHT TRANSMISSION, FIBER OPTICS, TRANSLATIONS, TITANIUM, OPTICAL SWITCHING, LITHIUM NIOBATES, CHINA, OPTICAL LENSES, CHINESE LANGUAGE.

Subject Categories : Fiber Optics and Integrated Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE