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  • Vol. 36, Iss. 17 — Sep. 1, 2011
  • pp: 3521–3523

High Q silica microbubble resonators fabricated by arc discharge

S. Berneschi, D. Farnesi, F. Cosi, G. Nunzi Conti, S. Pelli, G. C. Righini, and S. Soria  »View Author Affiliations


Optics Letters, Vol. 36, Issue 17, pp. 3521-3523 (2011)
http://dx.doi.org/10.1364/OL.36.003521


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Abstract

Microbubble resonators combine the unique properties of whispering gallery mode resonators with the intrinsic capability of integrated microfluidics. Here an improved fabrication method of microbubble resonators is presented, based on the heating of a slightly pressurized capillary by a rotating arc discharge. Rotation of the electrodes, moved out of a fiber splicer, ensures a homogeneous distribution of the heat all over the capillary surface. The demonstrated microbubble resonators have Q factors up to 6 × 10 7 at 1550 nm . Microbubbles were filled with water and aqueous solutions of ethanol in order to test the refractive index sensing capabilities of such resonators, which also show a good temporal stability. The limit of detection of our microbubble resonator sensor is 10 6 RIU .

© 2011 Optical Society of America

OCIS Codes
(130.6010) Integrated optics : Sensors
(140.4780) Lasers and laser optics : Optical resonators
(230.3990) Optical devices : Micro-optical devices
(140.3948) Lasers and laser optics : Microcavity devices
(280.4788) Remote sensing and sensors : Optical sensing and sensors

ToC Category:
Optical Devices

History
Original Manuscript: July 14, 2011
Revised Manuscript: August 5, 2011
Manuscript Accepted: August 5, 2011
Published: September 1, 2011

Citation
S. Berneschi, D. Farnesi, F. Cosi, G. Nunzi Conti, S. Pelli, G. C. Righini, and S. Soria, "High Q silica microbubble resonators fabricated by arc discharge," Opt. Lett. 36, 3521-3523 (2011)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-36-17-3521


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