Wavelength demultiplexing using bends in a single-mode optical fiber

Author

Harris, Andrew J. ; Shrubshall, Paul A. ; Castle, Peter F.

Author_Institution

Dept. of Electr. & Electron. Eng., Newcastle-upon-Tyne Univ., UK

Volume

6

Issue

1

fYear

1988

fDate

1/1/1988 12:00:00 AM

Firstpage

80

Lastpage

86

Abstract

A method of wavelength demultiplexing is developed that makes use of the wavelength and bend-radius dependence of the pure bend loss at single radius bends in a single-mode fiber. The light leaving the fiber at a bend forms one output of the demultiplexer. Equations are derived that predict the bend radii for the most-efficient operation of the demultiplexer and the power extracted from the fiber at each wavelength. The demultiplexer operates over the wavelength range corresponding to V numbers from 2.4 to 1.6. A two-wavelength demultiplexer formed from 90° bends is constructed and tested. Collection efficiencies of 70% and insertion losses of less than 2 dB are shown to be possible. Crosstalk isolation in excess of 40 dB can be achieved with the aid of optical wavelength filters. The performance of a three-wavelength demultiplexer is also considered

Keywords

bending; frequency division multiplexing; optical communication equipment; optical fibres; 2 dB; 70 percent; bend loss; bend-radius dependence; bends; crosstalk isolation; demultiplexer operation; fibre power; insertion losses; optical wavelength filters; radius bends; single-mode optical fiber; wavelength demultiplexing; Bit rate; Demultiplexing; Equations; Insertion loss; Interference; Optical crosstalk; Optical fiber communication; Optical fiber losses; Optical fiber testing; Optical fibers; Optical filters; Optical losses;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.3968

Filename

3968