Experimental demonstration of laser-machined high-Q microrod resonator for thermal sensing

Yu Yang; Mengyu Wang; Yuan Shen; Lingjun Meng; Lei Zhang; Wenbin Xu; Keyi Wang

doi:10.1117/12.2544320

18 December 2019 Experimental demonstration of laser-machined high-Q microrod resonator for thermal sensing

Yu Yang, Mengyu Wang, Yuan Shen, Lingjun Meng, Lei Zhang, Wenbin Xu, Keyi Wang

Proceedings Volume 11338, AOPC 2019: Optical Sensing and Imaging Technology; 113381O (2019) https://doi.org/10.1117/12.2544320
Event: Applied Optics and Photonics China (AOPC2019), 2019, Beijing, China

Abstract

The whispering-gallery-mode(WGM) resonators have a number of advantages, including ultra-high quality factor(Q factor), extremely small mode volume and so on. It has been widely used in many fields related to high sensitivity sensing measurement, photonics material, linear and non-linear optics, and optical communication. Here we built an experimental platform for microrod resonator fabrication with a high power CO2 laser. Based on this experimental fabrication platform, a microrod resonator with an approximate 2.5mm diameter has been made, which has an ultra-smooth surface. We also designed a test platform used a tapered fiber to measure optical performances of the fabricated microrod resonator. With this test platform, we measured the maximum Q factor of the fabricated resonator, which can reach 1.52×10⁸ under the condition of 1550nm wavelength. The fabrication platform for microrod resonator designed by our laboratory with features of fast (less than 10min), cheap, repeatable and low experimental condition. These features have huge advantages on further scaled sensing application, optoelectronic device. Furthermore, in order to design and fabricate the ultra-high sensitivity temperature sensing device, we demonstrated the frequency shift feature of the fabricated microrod resonator. We heated the microrod resonator from 22 ^oC to 25 ^oC , then calculated the experimental data. we demonstrated our microrod resonator has 0.04nm frequency shift, 14.41pm/^oC temperature sensitivity, and 6.3♦10⁻³ ^oC temperature resolution.

Citation Download Citation

Yu Yang, Mengyu Wang, Yuan Shen, Lingjun Meng, Lei Zhang, Wenbin Xu, and Keyi Wang "Experimental demonstration of laser-machined high-Q microrod resonator for thermal sensing", Proc. SPIE 11338, AOPC 2019: Optical Sensing and Imaging Technology, 113381O (18 December 2019); https://doi.org/10.1117/12.2544320

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KEYWORDS

Resonators

Optical fabrication

Gas lasers

Quartz

Laser resonators

Thermal sensing

Optical resonators

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