Add-drop multiplexing by dispersion inverted interference coupling

Author

Åslund, Mattias ; Poladian, Leon ; Canning, John ; De Sterke, C. Martijn

Author_Institution

Opt. Fiber Technol. Centre, Sydney Univ., NSW, Australia

Volume

20

Issue

8

fYear

2002

fDate

8/1/2002 12:00:00 AM

Firstpage

1585

Lastpage

1589

Abstract

We demonstrate experimentally a previously proposed add-drop multiplexer in a two-moded structure with a symmetric Bragg grating. The strong dispersion in the forward direction outside the reflective region of the grating is used to create a phase change for frequencies between the bandgaps of the supermodes of a twin core fiber. The phase change in transmission inverts the interference pattern at the end of the device. Signals within a narrow wavelength range couple out to one core; all other wavelengths couple out to the opposite core. Preliminary experimental results show a crosstalk ratio of 15 dB.

Keywords

Bragg gratings; multiplexing equipment; optical crosstalk; optical fibre couplers; optical fibre dispersion; wavelength division multiplexing; add-drop multiplexing; bandgaps; crosstalk ratio; dispersion inverted interference coupling; forward direction dispersion; frequency phase change; grating reflective region; multimode waveguides; spectral transmissivity; symmetric Bragg grating; transmission phase change; twin core fiber supermodes; two-moded structure; wavelength-division multiplexing; Australia; Bragg gratings; Canning; Interference; Manufacturing; Optical fiber couplers; Optical fiber devices; Optical interferometry; Optical waveguides; WDM networks;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2002.800355

Filename

1058173