An Optical Add-Drop Multiplexer with a Grating-Loaded Directional Coupler in Silica Waveguides

Naoki OFUSA  Takashi SAITO  Tsuyoshi SHIMODA  Tadahiko HANADA  Yutaka URINO  Mitsuhiro KITAMURA  

Publication
IEICE TRANSACTIONS on Communications   Vol.E82-B   No.8   pp.1248-1251
Publication Date: 1999/08/25
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: INVITED PAPER (Joint Special Issue on Recent Progress in Optoelectronics and Communications)
Category: Optical Passive Devices and Modules
Keyword: 
Bragg grating,  silica waveguide,  optical add/drop multiplexer (OADM),  wavelength division multiplexing (WDM),  

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Summary: 
An optical add-drop multiplexer with a grating-loaded directional coupler in silica waveguides is demonstrated. The device for this configuration has a large fabrication tolerance and is small in size. A new scheme, in which the coupling length of the directional coupler is twice the complete coupling length, enables low cross-talk for both add and drop operations. This device is polarization-independent due to its relatively low-temperature process.