Title :
Birefringence and path length adjustment of silica-based waveguide using permanent heater trimming
Author :
Mizuno, T. ; Kohtoku, M. ; Oguma, M. ; Hida, Y. ; Inoue, Y.
Author_Institution :
NTT Photonics Labs., NTT Corp., Atsugi Kanagawa, Japan
fDate :
3/18/2004 12:00:00 AM
Abstract :
A birefringence induction method involving thin film heaters to eliminate the polarisation dependence of silica-based waveguides is proposed. The birefringence is adjusted by applying different electric powers to a single thin-film heater. This method was applied to a lattice-form filter and reduced the polarisation dependent frequency shift (PD-f) to less than 0.9% of the frequency period.
Keywords :
birefringence; lattice filters; light polarisation; optical films; optical planar waveguides; optical waveguide filters; silicon compounds; SiO2; birefringence induction method; electric power; frequency shift; lattice form filter; permanent heater trimming; polarisation; silica based waveguide; thin film heater;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20040253
