tailieunhanh - Mid-infrared laser-spectroscopic sensing of chemical species

This letter reports on mid-infrared laser-based detection and analysis of chemical species. Emphasis is put on broadly tunable laser sources and sensitive detection schemes. Selected examples from our lab illustrate the performance and potential of such systems in various areas including environmental and medical sensing. | Journal of Advanced Research 2015 6 529-533 Cairo University Journal of Advanced Research LETTER TO THE EDITOR Mid-infrared laser-spectroscopic sensing of chemical species Markus W. Sigrist CrossMark ETH Zurich Institute for Quantum Electronics Laser Spectroscopy and Sensing Laboratory Otto-Stern-Weg 1 CH-8093 Zurich Switzerland ARTICLE INFO ABSTRACT Article history Received 5 August 2014 Received in revised form 23 September 2014 Accepted 29 September 2014 Available online 13 October 2014 This letter reports on mid-infrared laser-based detection and analysis of chemical species. Emphasis is put on broadly tunable laser sources and sensitive detection schemes. Selected examples from our lab illustrate the performance and potential of such systems in various areas including environmental and medical sensing. 2014 Production and hosting by Elsevier . on behalf of Cairo University. Keywords Mid-IR lasers Spectroscopy Gas sensing Surgical smoke Glucose Introduction In the recent years spectroscopic schemes have made significant progress thanks to new developments in lasers and detection techniques. Today laser-based sensing of chemical species offers high sensitivity and specificity large dynamic range multi-component capability and lack of pretreatment or preconcentration. The availability of broadly tunable mid-infrared sources - particularly in the important 3-4 pm wavelength range - such as quantum cascade lasers QCLs E-mail address sigristm@ Peer review under responsibility of Cairo University. Production and hosting by Elsevier 1-4 tunable radiation generated by nonlinear optical processes such as difference frequency generation DFG 5 6 and optical parametric oscillators OPOs 5 7 8 interband cascade diode lasers ICLs 9-11 distributed feedback DFB diode lasers 12 13 or the most recent development of diode-pumped lead salt vertical external cavity surface emitting lasers VECSELs 14 15 has certainly eased the implementation of laser-based sensing .