Open AccessAnalysis of polarisation mode splitting characteristic in optical race‐track resonator based on silicon‐on‐insulator rib waveguide
Author(s) -
Wei Liping,
Zang Junbin,
Wang Yonghua,
Cui Danfeng,
Li Yanna,
Liu Yaoying,
Xue Chenyang
Publication year - 2013
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2013.0274
Subject(s) - resonator , optics , wavelength , waveguide , birefringence , silicon on insulator , silicon , materials science , optoelectronics , physics
The detailed design and analysis of a polarisation mode splitting resonator based on a silicon‐on‐insulator rib waveguide are presented. By analysing the mode birefringence in the ultra‐small rib waveguide, the directional coupler is introduced to the microring resonator to realise the splitting of the quasi‐TE and quasi‐TM polarisation modes from the same output port for a specific wavelength range. It is demonstrated that after splitting the quasi‐TM polarisation mode, the Q ‐value of the quasi‐TE polarisation mode is about 2.3 × 10 4 , almost twice of that without splitting the quasi‐TM polarisation mode. This novel characteristic of a race‐track resonator allows it to obtain single polarisation mode at a specific wavelength by itself. This characteristic makes a contribution to accurate wavelength selection, which has been proved to be very useful in the dynamic testing of electrooptical modulators and quite promising in many other applications of optical components.