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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 20 — Sep. 26, 2011
  • pp: 19668–19674

Versatile optofluidic ring resonator lasers based on microdroplets

Wonsuk Lee, Yunhan Luo, Qiran Zhu, and Xudong Fan  »View Author Affiliations


Optics Express, Vol. 19, Issue 20, pp. 19668-19674 (2011)
http://dx.doi.org/10.1364/OE.19.019668


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Abstract

We develop a novel nL-sized microdroplet laser based on the capillary optofluidic ring resonator (OFRR). The microdroplet is generated in a microfluidic channel using two immiscible fluids and is subsequently delivered to the capillary OFRR downstream. Despite the presence of the high refractive index (RI) carrier fluid, the lasing emission can still be achieved for the droplet formed by low RI solution. The lasing threshold of 1.54 µJ/mm2 is achieved, >6 times lower than the state-of-the-art, thanks to the high Q-factor of the OFRR. Furthermore, the lasing emission can be conveniently coupled into an optical fiber. Finally, tuning of the lasing wavelength is achieved via highly efficient fluorescence resonance energy transfer processes by merging two different dye droplets in the microfluidic channel. Versatility combined with improved lasing characteristics makes our OFRR droplet laser an attractive platform for high performance optofluidic lasers and bio/chemical sensing with small sample volumes.

© 2011 OSA

OCIS Codes
(140.2050) Lasers and laser optics : Dye lasers
(170.4520) Medical optics and biotechnology : Optical confinement and manipulation
(230.3990) Optical devices : Micro-optical devices
(230.5750) Optical devices : Resonators

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: August 22, 2011
Revised Manuscript: September 11, 2011
Manuscript Accepted: September 11, 2011
Published: September 22, 2011

Virtual Issues
Vol. 6, Iss. 10 Virtual Journal for Biomedical Optics

Citation
Wonsuk Lee, Yunhan Luo, Qiran Zhu, and Xudong Fan, "Versatile optofluidic ring resonator lasers based on microdroplets," Opt. Express 19, 19668-19674 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-20-19668


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