High Q silica microbubble resonators fabricated by heating a pressurized glass capillary

Zhe Yu; Tiegen Liu; Junfeng Jiang; Kun Liu; Wenjie Chen; Xuezhi Zhang; Xujun Lin; Wenhui Liu

doi:10.1117/12.2073472

11 November 2014 High Q silica microbubble resonators fabricated by heating a pressurized glass capillary

Zhe Yu, Tiegen Liu, Junfeng Jiang, Kun Liu, Wenjie Chen, Xuezhi Zhang, Xujun Lin, Wenhui Liu

Proceedings Volume 9274, Advanced Sensor Systems and Applications VI; 92740L (2014) https://doi.org/10.1117/12.2073472
Event: SPIE/COS Photonics Asia, 2014, Beijing, China

Abstract

Microbubble resonators combine the unique properties of whispering gallery mode resonators with the capability of integrated microfluidics. The microbubble resonator is fabricated by heating the tapered tip of a pressurized glass capillary with oxyhydrogen flame. Firstly, a microtube with a diameter of 250um is stretched under heating of oxyhydrogen flame, the heating zone length is set to be 20mm and the length of stretch is set to be 7000um.Then nitrogen will be pumped in to the tapered microtube with the pressure of 0.1Mpa, the tapered tip will be heated by the oxyhydrogen flame continuously until a microbubble forms. An optical fiber taper with a diameter of 2 um, fabricated by stretching a single-mode optical fiber under flame was brought in contact with the microbubble to couple the light from a 1550nm tunable diode laser into the whispering gallery mode. The microbubble resonator has a Q factors up to 1.5 × 10⁷ around 1550nm. Different concentrations of ethanol solution (from 5% to 30%) are filled into it in order to test the refractive index sensing capabilities of such resonator, which shows a sensitivity of 82nm/RIU.

Citation Download Citation

Zhe Yu, Tiegen Liu, Junfeng Jiang, Kun Liu, Wenjie Chen, Xuezhi Zhang, Xujun Lin, and Wenhui Liu "High Q silica microbubble resonators fabricated by heating a pressurized glass capillary", Proc. SPIE 9274, Advanced Sensor Systems and Applications VI, 92740L (11 November 2014); https://doi.org/10.1117/12.2073472

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