Dielectric mirror embedded optical fiber couplers

Author

Shin, Jong-Dug ; Taylor, Henry F.

Author_Institution

Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA

Volume

12

Issue

1

fYear

1994

fDate

1/1/1994 12:00:00 AM

Firstpage

68

Lastpage

73

Abstract

Dielectric mirrors in multimode and single-mode silica fibers have been produced by a fusion-splicing technique. Mirrors oriented normally and at a 45° angle to the axis have been studied. Fibers with angled internal mirrors serve as compact directional couplers with low excess optical loss (≈0.2 dB for multimode and 0.5 dB for single mode at 1.3 μm) and excellent mechanical properties. The reflectance is found to be wavelength dependent and strongly polarization dependent. Far-field scans of the reflected output power measured with a white-light source show a pattern that is almost circularly symmetric. The splitting ratio in a multimode coupler measured with a laser source is much less dependent on input coupling conditions than in conventional fused biconical-taper couplers. Spectral properties of multilayer mirrors oriented normally to the fiber axis have been investigated experimentally, and a matrix analysis has been used to explain the results

Keywords

directional couplers; light polarisation; mirrors; optical couplers; optical fibre fabrication; optical fibres; optical losses; reflectivity; 0.2 dB; 0.5 dB; 45° angle; angled internal mirrors; circularly symmetric; compact directional couplers; dielectric mirror; embedded optical fiber couplers; far-field scans; fused biconical-taper couplers; fusion-splicing technique; input coupling; laser source; low excess optical loss; mechanical properties; multimode coupler; multimode silica fibers; reflectance; reflected output power; single-mode silica fibers; splitting ratio; strongly polarization dependent; wavelength dependent; white-light source; Dielectrics; Directional couplers; Mechanical factors; Mirrors; Optical coupling; Optical fiber couplers; Optical fiber losses; Optical fiber polarization; Silicon compounds; Wavelength measurement;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.265738

Filename

265738