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Proceedings Paper

High Q silica microbubble resonators fabricated by heating a pressurized glass capillary
Author(s): Zhe Yu; Tiegen Liu; Junfeng Jiang; Kun Liu; Wenjie Chen; Xuezhi Zhang; Xujun Lin; Wenhui Liu
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Paper 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.

Paper Details

Date Published: 11 November 2014
PDF: 7 pages
Proc. SPIE 9274, Advanced Sensor Systems and Applications VI, 92740L (11 November 2014); doi: 10.1117/12.2073472
Show Author Affiliations
Zhe Yu, Tianjin Univ. (China)
Key Lab. of Opto-electronics Information Technology (China)
Tiegen Liu, Tianjin Univ. (China)
Key Lab. of Opto-electronics Information Technology (China)
Junfeng Jiang, Tianjin Univ. (China)
Key Lab. of Opto-electronics Information Technology (China)
Kun Liu, Tianjin Univ. (China)
Key Lab. of Opto-electronics Information Technology (China)
Wenjie Chen, Tianjin Univ. (China)
Key Lab. of Opto-electronics Information Technology (China)
Xuezhi Zhang, Tianjin Univ. (China)
Key Lab. of Opto-electronics Information Technology (China)
Xujun Lin, Tianjin Univ. (China)
Key Lab. of Opto-electronics Information Technology (China)
Wenhui Liu, Tianjin Univ. (China)
Key Lab. of Opto-electronics Information Technology (China)


Published in SPIE Proceedings Vol. 9274:
Advanced Sensor Systems and Applications VI
Tiegen Liu; Shibin Jiang; Niels Neumann, Editor(s)

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