September 2018
Spotlight Summary by Alessando Chiasera
In-fiber whispering-gallery mode microsphere resonator-based integrated device
M. Zhang and coauthors propose, realize, and test an innovative coupling method to excite whispering-gallery modes (WGMs) of a microsphere resonator. The coupling is obtained by placing a silica microsphere into an embedded dual-core hollow fiber (EDCHF). Using a fiber tapering method, a silica microsphere can be placed and fixed in the transition section of the hollow core of the EDCHF. The transmitted light from the tapered input single-mode fiber (SMF) is coupled into the embedded silica microsphere via the two suspended fiber cores.
Thanks to the easy fabrication, the possibility to reach very high quality factors, and coating with active or functional materials, silica-based microsphere resonators are becoming one of the more appealing photonic devices for several applications ranging from low-threshold lasers to mechanical and chemical sensing. However, obtaining an efficient coupling between optical fibers and a microspherical resonator, insensible to environmental interferences and with good mechanical stability, is a scientific and technological challenge.
The paper proposes an alternative and innovative coupling technique and characterizes the polarization and temperature dependence of this integrated device. Moreover, the coupling mechanism between the cores of the fiber and the microsphere is explained and modelled.
You must log in to add comments.
Thanks to the easy fabrication, the possibility to reach very high quality factors, and coating with active or functional materials, silica-based microsphere resonators are becoming one of the more appealing photonic devices for several applications ranging from low-threshold lasers to mechanical and chemical sensing. However, obtaining an efficient coupling between optical fibers and a microspherical resonator, insensible to environmental interferences and with good mechanical stability, is a scientific and technological challenge.
The paper proposes an alternative and innovative coupling technique and characterizes the polarization and temperature dependence of this integrated device. Moreover, the coupling mechanism between the cores of the fiber and the microsphere is explained and modelled.
Add Comment
You must log in to add comments.
Article Information
In-fiber whispering-gallery mode microsphere resonator-based integrated device
Meng Zhang, Wenlei Yang, Ke Tian, Jibo Yu, Angzhen Li, Shunbin Wang, Elfed Lewis, Gerald Farrell, Libo Yuan, and Pengfei Wang
Opt. Lett. 43(16) 3961-3964 (2018) View: Abstract | HTML | PDF