Comb-resolved spectroscopy with immersion grating in long-wave infrared

Abstract

We have developed a dispersive spectrometer using a compact immersion grating for direct frequency comb spectroscopy in the long-wave infrared region of 8-10 μm. A frequency resolution of 463 MHz is achieved, which is the highest reported in this wavelength region with a dispersive direct frequency comb spectrometer. We also demonstrate individual mode-resolved imaging of the frequency comb spectrum by Vernier cavity filtering and apply this to obtain both simple and complex molecular spectra. These results indicate that the immersion grating spectrometer offers the next advancement for sensitive, high-resolution spectroscopy of transient and large/complex molecules when combined with cavity enhancement and cooling techniques.

References in corpus (10)

• High Coherence Mid-Infrared Dual Comb Spectroscopy Spanning 2.6 to 5.2 microns
• Mid-Infrared Frequency Comb Fourier Transform Spectrometer
• Mid-infrared dual-comb spectroscopy with electro-optic modulators
• Cavity-enhanced optical frequency comb spectroscopy in the mid-infrared - application to trace detection of H2O2
• Direct Frequency Comb Measurement of OD + CO -> DOCO Kinetics
• Continuous probe of cold complex molecules with infrared frequency comb spectroscopy
• Mid-infrared VIPA Spectrometer for Rapid and Broadband Trace Gas Detection
• Optical frequency comb spectroscopy at 3-5.4 μm with a doubly resonant optical parametric oscillator
• Open-Air, Broad-Bandwidth Trace-Gas Sensing with a Mid-Infrared Optical Frequency Comb
• Phase-stabilized 100 mW frequency comb near 10 μm

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• Optical Frequency Comb Fourier Transform Spectroscopy of ${}^{14}$N${}_2$${}^{16}$O at 7.8 μm
• Erbium-doped-fiber-based broad visible range frequency comb with a 30 GHz mode spacing for astronomical applications
• An air-spaced virtually imaged phased array with 94 MHz resolution for precision spectroscopy