Photonics Research, 2020, 8 (4): 04000616, Published Online: Apr. 1, 2020
Mid-infrared chalcogenide microfiber knot resonators Download: 719次
Abstract
A novel type of mid-IR microresonator, the chalcogenide glass (ChG) microfiber knot resonator (MKR), is demonstrated, showing easy fabrication, fiber-compatible features, resonance tunability, and high robustness. ChG microfibers with typical diameters around 3 μm are taper-drawn from glass fibers and assembled into MKRs in liquid without surface damage. The measured factor of a typical 824 μm diameter ChG MKR is about at the wavelength of 4469.14 nm. The free spectral range (FSR) of the MKR can be tuned from 2.0 nm (28.4 GHz) to 9.6 nm (135.9 GHz) by tightening the knot structure in liquid. Benefitting from the high thermal expansion coefficient of glass, the MKR exhibits a thermal tuning rate of at the resonance peak. When embedded in polymethyl methacrylate (PMMA) film, a 551 μm diameter MKR retains a factor of . The ChG MKRs demonstrated here are highly promising for resonator-based optical technologies and applications in the mid-IR spectral range.
Yu Xie, Dawei Cai, Hao Wu, Jing Pan, Ning Zhou, Chenguang Xin, Shaoliang Yu, Pan Wang, Xiaoshun Jiang, Jianrong Qiu, Xin Guo, Limin Tong. Mid-infrared chalcogenide microfiber knot resonators[J]. Photonics Research, 2020, 8(4): 04000616.