Title :
Low-Loss Microdisk-Based Delay Lines for Narrowband Optical Filters
Author :
Li, Qing ; Eftekhar, Ali A. ; Alipour, Payam ; Atabaki, Amir H. ; Yegnanarayanan, Siva ; Adibi, Ali
Author_Institution :
Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA
Abstract :
Over-coupled microdisk resonators with high intrinsic quality factors are proposed as compact and low-insertion-loss delay lines for narrowband optical filters. Design challenges including dealing with the multimode nature of the microdisk resonator and achieving a strong coupling to the selected mode are addressed. Employing the microdisk-based delay line, we demonstrate a compact first-order tunable narrowband filter in a silicon-on-insulator platform, whose 3-dB bandwidth can be tuned from 0.47 to 4 GHz within an area of 0.05 mm2.
Keywords :
Q-factor; integrated optics; optical delay lines; optical filters; optical resonators; silicon-on-insulator; compact first order tunable narrowband filter; frequency 0.47 GHz to 4 GHz; low insertion loss; low loss microdisk based delay lines; narrowband optical filters; overcoupled microdisk resonators; quality factors; silicon-on-insulator; Bandwidth; Couplings; Delay lines; Optical filters; Optical resonators; Optical waveguides; Resonator filters; Delay line; microdisk resonator; narrowband; optical filter; silicon-on-insulator (SOI);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2012.2200472
