Analysis of polarisation mode splitting characteristic in optical race‐track resonator based on silicon‐on‐insulator rib waveguide. (1st October 2013)

• Record Type: Journal Article
• Authors: Wei, Liping; Zang, Junbin; Wang, Yonghua; Cui, Danfeng; Li, Yanna; Liu, Yaoying; Xue, Chenyang
• Is Part Of: Micro & nano letters. Volume 8:Number 10(2013)
• Page Start: 664
• Page End: 667
• Publication Date: 2013-10-01
• Subjects: birefringence -- directional couplers -- electro‐optical modulation -- light polarisation -- optical design techniques -- optical resonators -- optical testing -- rib waveguides -- silicon‐on‐insulator; polarisation mode splitting -- optical race‐track resonator -- silicon‐on‐insulator -- mode birefringence -- ultrasmall rib waveguide -- directional coupler -- microring resonator -- quasiTE polarisation mode -- quasiTM polarisation mode -- Q‐value -- dynamic testing -- electrooptical modulators -- Si; Nanotechnology -- Periodicals; Nanostructures -- Periodicals; Microtechnology -- Periodicals; 620.5
• DOI: 10.1049/mnl.2013.0274
• Languages: English
• ISSNs: 1750-0443

Abstract

Abstract : 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.