Tunable and Polarization-Insensitive Arrayed-Waveguide Grating Multiplexer Fabricated from Fluorinated Polyimides

Junya KOBAYASHI  Yasuyuki INOUE  Tohru MATSUURA  Tohru MARUNO  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E81-C   No.7   pp.1020-1026
Publication Date: 1998/07/25
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Organic Materials for Optics and Electronics)
Category: 
Keyword: 
fluorinated polyimide,  arrayed-waveguide grating (AWG),  multiplexer,  polymer optical waveguide,  polarization-insensitivity,  tunable AWG,  

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Summary: 
We fabricated a tunable and polarization-insensitive arrayed-waveguide grating (AWG) 1616 multiplexer that operates around the wavelength of 1. 55 µm using fluorinated polyimides. The wavelength channel spacing was 0. 8 nm, and the 3-dB passband width was 0. 26 nm. The insertion loss at each channel was from 8 to 12 dB, and the crosstalk was less than -28 dB. The transmission pass wavelength was tuned over a wide range of 6 nm by heating from 24 to 64. The slope of the temperature dependence of the pass wavelength was -0. 15 nm/, which is ten times that of a silica-based multiplexer. Polarization-insensitivity was achieved by fabricating a film AWG multiplexer, which was formed by removing the silicon substrate and annealing at 350. The polarization-dependent wavelength shift was smaller than the spectrum analyzers wavelength resolution of 0. 1 nm.