NANOPHOTONIC SUPERCONTINUUM-BASED MID-INFRARED DUAL-COMB SPECTROSCOPY

Schmidt, Dag

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https://hdl.handle.net/2142/104513 Copy

Description

Title

NANOPHOTONIC SUPERCONTINUUM-BASED MID-INFRARED DUAL-COMB SPECTROSCOPY

Author(s)

Schmidt, Dag

Contributor(s)

Kippenberg, Tobias J.; Thévenaz, Luc ; Brès, Camille-Sophie ; Yang, Fan ; Liu, Junqiu ; Weng, Wenle ; Guo, Hairun ; Hänsel, Wolfgang ; Holzwarth, R.

Issue Date

2019-06-17

Keyword(s)

Instrument/Technique Demonstration

Abstract

An optically stabilized dual-comb system is used to drive a mid-infrared spectroscopy for parallel gas-phase detection in the functional group region from 2800-3600 cm$^{-1}$. The system comprises two amplified ultra-low noise fiber frequency combs (\textbf{FC-1500-ULN from Menlo Systems}), centered at 1550 nm wavelength, which are spectrally broadened to the mid-IR by two chip-based $\text{Si}_3 \text{N}_4$ waveguides. The probe comb passes through a gas-cell containing CH$_4$ (430 ppm), C$_2$H$_2$ (420~ppm), and N$_2$ as a buffer gas and is eventually superimposed with the reference comb on a photodetector. The dual-comb spectrum below reveals the corresponding absorption features, with sufficient resolution to even resolve isotopologues. The present absorption feature of H$_2$O is due to interaction with water vapour during free-space propagation. \begin{wrapfigure}{i}{0pt} \includegraphics[width = 0.625 \linewidth]{Fig1C.eps} \end{wrapfigure}

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

English

Permalink

http://hdl.handle.net/2142/104513

DOI

10.15278/isms.2019.MJ01

Copyright and License Information

Copyright 2019 Dag Schmidt

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