Details

Autor(en) / Beteiligte

• Nugent-Glandorf, Lora
• Neely, Tyler
• Adler, Florian
• Fleisher, Adam J
• Cossel, Kevin C
• Bjork, Bryce
• Dinneen, Tim
• Ye, Jun
• Diddams, Scott A

Titel

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

Ist Teil von

• Optics letters, 2012-08, Vol.37 (15), p.3285

Ort / Verlag

United States

Erscheinungsjahr

2012

Link zum Volltext

Quelle

MEDLINE

Beschreibungen/Notizen

• 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 dynamic concentration changes of CH4 at a rate of ~375 frames per second. Changes in absorption above the noise floor of 5×10(-4) are readily detected on the millisecond time scale, leading to important future applications such as real-time monitoring of trace gas concentrations and detection of reactive intermediates.