DocumentCode :
3607587
Title :
Performance Analysis of a Broadband Second-Order Mode Converter Based on Multimode Interference Coupler and Phase Shifter
Author :
Jifang Qiu ; DaoLin Zhang ; Ye Tian ; Jian Wu ; Yan Li ; Yue Wang
Author_Institution :
State Key Lab. of Inf. Photonics & Opt. Commun., Beijing Univ. of Posts & Telecommun., Beijing, China
Volume :
7
Issue :
5
fYear :
2015
Firstpage :
1
Lastpage :
8
Abstract :
A novel mode converter with broad bandwidth, high mode conversion efficiency, and large fabrication tolerance is proposed and fabricated on a silicon-on-insulator (SOI) platform. By using a modified 3 × 3 multimode interference coupler and an enlarged butterfly-shaped phase shifter, mode conversion from the fundamental mode (TE0) to second-order mode (TE2) is achieved numerically and experimentally. Performance analysis of the mode converter is carried out numerically, and the results show high performance of the mode converter with mode conversion efficiency larger than 91% (i.e., insertion loss less than 0.40 dB) in the whole C-band. In addition, the mode converter has large fabrication tolerance. For example, the width and the length deviations of the multimode interference coupler can be as large as 50 and 250 nm, respectively, whereas the width and the length deviations of the phase shifter can be up to 25 and 400 nm, respectively.
Keywords :
integrated optics; light interference; optical couplers; optical phase shifters; silicon-on-insulator; Si; broadband second-order mode converter; butterfly-shaped phase shifter; fabrication tolerance; high mode conversion efficiency; multimode interference coupler; performance analysis; second-order mode; silicon-on-insulator platform; Couplers; Fabrication; Insertion loss; Interference; Optical waveguides; Phase shifters; Power generation; Multiplexing; integrated optics devices; waveguides;
fLanguage :
English
Journal_Title :
Photonics Journal, IEEE
Publisher :
ieee
ISSN :
1943-0655
Type :
jour
DOI :
10.1109/JPHOT.2015.2486719
Filename :
7289341
Link To Document :
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