Title :
Effect of the first-order mode in access waveguides on the performance of unbalanced MMI couplers
Author :
Patent, E.A. ; van der Tol, J.J.G.M. ; Binsma, J.J.M. ; Smit, M.K.
Author_Institution :
Fac. of Electr. Eng., Opto-Electron. Devices, Eindhoven Univ. of Technol., Netherlands
Abstract :
This study demonstrates that the excitation of the first-order mode in access waveguides can significantly deteriorate the coupling ratio of unbalanced MMI couplers and increase the excess losses. Care, therefore, should be taken in coupling light into the access waveguides, as well as in the circuit design to avoid this effect. Another option for this, as measurement results suggest, is controlling the relative phase difference.
Keywords :
integrated optics; optical couplers; optical losses; optical testing; optical waveguides; access waveguides; first-order mode; optical losses; unbalanced MMI couplers; Communications technology; Couplers; Etching; Integrated circuit technology; Integrated optics; Optical devices; Optical films; Optical waveguides; Optoelectronic devices; Photonic integrated circuits;
Conference_Titel :
Lasers and Electro-Optics Society, 2003. LEOS 2003. The 16th Annual Meeting of the IEEE
Print_ISBN :
0-7803-7888-1
DOI :
10.1109/LEOS.2003.1251792
