Send to

Choose Destination
See comment in PubMed Commons below
Opt Express. 2009 Jul 6;17(14):11719-29.

Femtosecond laser written optofluidic sensor: Bragg Grating Waveguide evanescent probing of microfluidic channel.

Author information

The Edward S Rogers Sr Department of Electrical and Computer Engineering, Institute for Optical Sciences, University of Toronto, M5S 3G4 Toronto, Ontario, Canada.


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.

[Indexed for MEDLINE]
PubMed Commons home

PubMed Commons

How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Optical Society of America
    Loading ...
    Support Center