Special Presentation: Fabrizio Giorgetta

    Wednesday, February 12, 2020 - 2:00pm - 3:15pm
    Meinel 307

    1630 E. University Blvd.



    Open to campus and public.


    Speaker: Fabrizio Giorgetta

    Topic: Dual-comb spectroscopy


    Dual-comb spectroscopy (DCS) attracts significant interest due to its fast acquisition times, absolute frequency accuracy, negligible lineshape, and coherent probe light. These features make DCS well suited for simultaneous multi-species measurements across open-paths with lengths ranging from 100's of meters to several kilometers.
    I will discuss the working principle of DCS and present our DCS spectrometers covering  the near-infrared (around 1500 nm) and the mid-infrared (3000 nm - 5000 nm) spectral regions. I will present results that show the high precision of DCS trace gas concentration measurements and DCS field measurements of trace gas enhancements caused by oil-and-gas extraction sites as well as agricultural cattle feed lots.

    Speaker Bio(s): 

    Biography Fabrizio Giorgetta, Senior research associate at NIST in Boulder, CO:
    Fabrizio Giorgetta obtained a masters in electrical engineering from ETH Zurich and a Ph.D. in experimental physics from the university of Neuchatel, Switzerland for his work on intersubband quantum cascade detectors. In 2008, he started working at NIST Boulder on fiber laser frequency combs and dual-comb applications, such as cw laser waveform characterization, ranging, and high-precision time/frequency transfer over free-space links. Over the last years, his focus was on dual-comb spectroscopy applications in the near- and mid-infrared spectral ranges, in particular trace gas concentration measurements across km-scale open-air paths.