Single Mode Mid-infrared Waveguide for Evanescent Sensor Scheme in Liquids

A Si/Ge based, single mode, mid-infrared optical waveguide, is used as an evanescent sensor in liquid matrix. The selectivity is achieved by the use of quantum cascade lasers (QCLs) tuned to the maximum absorption of a given analyte. The cocaine detection in human saliva at 5.81 microns is chosen as a pilot application to demonstrate the technology. Light emitted from the QCL is butt coupled into the Si/Ge waveguide. The waveguide is passing through the detection part of the micro-fluidic sample preparatory/handler, and interacting with the analyte, it is collected and guided into the mid infrared quantum cascade detector QCD.


Presented at:
6th International Conference on Microtechnologies in Medicine and Biology (MMB 2011), Lucerne, Switzerland, May 4-6, 2011
Year:
2011
Keywords:
Laboratories:




 Record created 2011-06-28, last modified 2018-09-13

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