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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editor: Gregory W. Faris
  • Vol. 4, Iss. 9 — Sep. 4, 2009

Femtosecond laser written optofluidic sensor: Bragg grating waveguide evanescent probing of microfluidic channel

Valeria Maselli, Jason R. Grenier, Stephen Ho, and Peter R. Herman  »View Author Affiliations


Optics Express, Vol. 17, Issue 14, pp. 11719-11729 (2009)
http://dx.doi.org/10.1364/OE.17.011719


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Abstract

Microfluidic channels and Bragg Grating Waveguides (BGWs) were simultaneously fabricated inside fused silica glass by means of femtosecond laser exposure followed by chemical etching. Evanescent field penetration of the waveguide mode into the parallel microfluidic channel induced Bragg resonant wavelength shifts to enable refractive index characterization of the fluidic medium in the 1 to 1.452 range. Laser exposure was optimized to fabricate devices with optically smooth channel walls and narrow Bragg resonances for high sensing response at 1560 nm wavelength. Reference gratings were also employed in the optical circuit for temperature and strain compensation. These devices open new directions for optical sensing in three-dimensional optofluidic and reactor microsystems.

© 2009 Optical Society of America

OCIS Codes
(130.3120) Integrated optics : Integrated optics devices
(140.3390) Lasers and laser optics : Laser materials processing
(140.7090) Lasers and laser optics : Ultrafast lasers
(230.1480) Optical devices : Bragg reflectors
(280.4788) Remote sensing and sensors : Optical sensing and sensors

ToC Category:
Integrated Optics

History
Original Manuscript: May 27, 2009
Revised Manuscript: June 11, 2009
Manuscript Accepted: June 23, 2009
Published: June 26, 2009

Virtual Issues
Vol. 4, Iss. 9 Virtual Journal for Biomedical Optics

Citation
Valeria Maselli, Jason R. Grenier, Stephen Ho, and Peter R. Herman, "Femtosecond laser written optofluidic sensor: Bragg grating waveguide evanescent probing of microfluidic channel," Opt. Express 17, 11719-11729 (2009)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=oe-17-14-11719


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