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

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)

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Document Details

Document Type
Technical Report
Publication Date
Mar 06, 1995
Accession Number
ADA293249

Entities

People

  • Fan Junqing
  • Gai Junjie
  • Xu Chengjie
  • Zhao Qinghua

Organizations

  • National Air and Space Intelligence Center

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Accuracy
  • Air Intelligence
  • Couplings
  • Detectors
  • Diameters
  • Efficiency
  • Equations
  • Far Field
  • Fiber Optics
  • Fibers
  • Integrated Optics
  • Optical Fibers
  • Optics
  • Refractive Index
  • Spectrum Analyzers
  • Translations
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Optical Fiber Sensing and Electromagnetic Propagation.
  • Optical Physics and Photonics.