Title :
Multimode interference filter to solve degradation on coupler common-mode rejection
Author :
Vázquez, C. ; Aramburu, C. ; Lòpez-Amo, M. ; Pena, J.M.S.
Author_Institution :
Univ. Carlos III, Madrid, Spain
Abstract :
After quantifying degradation of a common mode rejection ratio (CMRR) 3dB-coupler due to excitation of TE01 mode, a novel compact circuit including multimode interference (MMI) coupler+bend+MMI+filter (CBF) is proposed. We show a CBF circuit has better CMRR at the expense of moderate loss. A complete tolerance analysis to main geometrical parameters has also been carried out
Keywords :
frequency division multiple access; light interference; optical communication equipment; optical couplers; optical design techniques; optical waveguide filters; waveguide discontinuities; 3dB-coupler; CBF circuit; TE01 mode; common mode rejection ratio; compact circuit; coupler common-mode rejection; degradation; geometrical parameters; multimode interference coupler; multimode interference filter; tolerance analysis; Couplers; Coupling circuits; Degradation; Electronic mail; Fabrication; Filters; Insertion loss; Interference; Monolithic integrated circuits; Tolerance analysis;
Conference_Titel :
Lasers and Electro-Optics Society Annual Meeting, 1998. LEOS '98. IEEE
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-4947-4
DOI :
10.1109/LEOS.1998.737862
