Mid-infrared virtually imaged phased array spectrometer for rapid and broadband trace gas detection.

  title={Mid-infrared virtually imaged phased array spectrometer for rapid and broadband trace gas detection.},
  author={Lora Nugent-Glandorf and Tyler W. Neely and Florian Adler and Adam J. Fleisher and Kevin C. Cossel and Bryce J Bjork and Timothy P. Dinneen and Jun Ye and Scott A. Diddams},
  journal={Optics letters},
  volume={37 15},
We present and characterize a two-dimensional (2D) imaging spectrometer based on a virtually imaged phased array (VIPA) disperser for rapid, high-resolution molecular detection using mid-infrared (MIR) frequency combs at 3.1 and 3.8 μm. We demonstrate detection of CH4 at 3.1 μm with >3750 resolution elements spanning >80 nm with ~600 MHz resolution in a <10 μs acquisition time. In addition to broadband detection, we also demonstrate rapid, time-resolved single-image detection by capturing… 

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