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Effect of Host Polymer on Microfiber Resonator

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3 Author(s)
Guillaume Vienne ; Zhejiang Univ., Hangzhou ; Yuhang Li ; Limin Tong

We observe that changing the surrounding material from air to a low refractive index polymer can considerably alter the transmission spectrum of a microfiber knot around a given wavelength. We report on a silica microfiber knot resonator about 180 m in diameter. Using a supercontinuum source, we study its transmission when air and when a low index polymer are used as cladding. The resonator shows similar extinction ratio and Q-factor for both cladding materials. However, embedding the resonator in the polymer down-shifts the optimal operating wavelength by about 20%.

Published in:

IEEE Photonics Technology Letters  (Volume:19 ,  Issue: 18 )