Title :
A study of tunable optical filters based on micro-ring structures
Author :
Huang, J.-M. ; Yao, Y.D. ; Deng, Z.L.
Author_Institution :
Sch. of Electron. Eng., Beijing Univ. of Posts & Telecommun., Beijing, China
Abstract :
A tunable optical filter based on micro-ring structure is studied in the paper. The normalized energy expression is derived at the output port of the filter. Some factors, such as losses and coupling coefficient, are given to valuate the performance of the filter. The change of waveguide´s effective refractive index is calculated to implement the tuning characteristics of the filter. The influence of refractive index´s change on the free spectrum range (FSR) and the full width at half maximum (FWHM) of the filter is small, so the tuning method of changing refraction index is feasible. Structures using electrode thermal pad and p-i-n respectively are brought forwards to realize the tuning characteristics of the filter.
Keywords :
optical waveguide filters; refractive index; coupling coefficient; electrode thermal pad; free spectrum range; microring structures; normalized energy expression; tunable optical filters; waveguide effective refractive index; Optical filters; Free charge carrier; Micro-ring; Plasma dispersion; Thermal tuning; Tunable optical filter;
Conference_Titel :
Mechatronics and Automation, 2009. ICMA 2009. International Conference on
Conference_Location :
Changchun
Print_ISBN :
978-1-4244-2692-8
Electronic_ISBN :
978-1-4244-2693-5
DOI :
10.1109/ICMA.2009.5246120
