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Ultrabroad band mid-IR frequency combs for sensitive molecular de | 3439
Journal of Physical Chemistry & Biophysics

Journal of Physical Chemistry & Biophysics
Open Access

ISSN: 2161-0398

+44 1478 350008

Ultrabroad band mid-IR frequency combs for sensitive molecular detection: frequency-divide-and-conquer approach


International Conference and Trade fair on Laser Technology

July 20-22, 2015 Orlando, Florida, USA

Konstantin Vodopyanov

Keynote: J Phys Chem Biophys

Abstract :

I will present a new technique for extending frequency combs to the highly desirable mid-IR �??molecular fingerprint�?? spectral range. The technique is based on subharmonic optical parametric oscillation (OPO) in quasi-phase-matched GaAs crystal. This process can be considered as a reverse of the second harmonic generation: the frequency comb of a pump laser (Tm-fiber 2-μm laser or Cr:ZnS 2.4-μm laser) is transposed to half of its central frequency and simultaneously spectrally augmented to more than an octave, thanks to the enormous gain bandwidth near OPO degeneracy and cross-coupling between the laser and the OPO frequency comb lines. With this source we demonstrate massively-parallel trace detection of molecular mixtures and achieve part-per-billion sensitivity levels. Our present focus is both biomedical and security applications of mid-IR spectral combs.

Biography :

Konstantin L. Vodopyanov obtained his MS degree from Moscow Institute of Physics and Technology (�??Phys-Tech�?�) and accomplished his PhD and DSc (Habilitation) in the Oscillations Lab. of Lebedev Physical Inst. and General Physics Inst. correspondingly. He was an assistant professor at Moscow Phys-Tech (1985-90), Alexandervon- Humboldt Fellow at the University of Bayreuth, Germany (1990-92), and a Royal Society postdoctoral fellow and lecturer at Imperial College, London, UK (1992-98). After working for 5 years in laser industry he returned to Academia (Stanford University, 2003-2013) and is now a Chair Professor of Optics at CREOL, College of Optics & Photonics, Univ. Central Florida. Dr. Vodopyanov is a Fellow of APS, OSA, SPIE, and the UK Institute of Physics (IOP). He has > 325 technical publications and is member of program committees for several major laser conferences including CLEO (most recent, General Chair in 2010) and Photonics West (Conference Chair). His research interests include nonlinear optics, laser spectroscopy, mid-IR and terahertz-wave generation, ultra broadband frequency combs and their biomedical applications.

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