Fourier-transform complex refractive index spectroscopy at Hz-level with optical frequency combs

Charczun, Dominik

Permalink

https://hdl.handle.net/2142/100461 Copy

Description

Title

Fourier-transform complex refractive index spectroscopy at Hz-level with optical frequency combs

Author(s)

Charczun, Dominik

Contributor(s)

• Soboń, Grzegorz
• Tomaszewska, Dorota
• Huke, Philipp
• Debus, Michael
• Maslowski, Piotr
• Trawiński, Ryszard S.
• Lisak, Daniel
• Cygan, Agata
• Nishiyama, Akiko
• Kowzan, Grzegorz

Issue Date

2018-06-19

Keyword(s)

Mini-symposium: Frequency-Comb Spectroscopy

Abstract

Two relatively new spectroscopic techniques suitable for implementation in a broadband FTS are cavity mode-width spectroscopy and cavity mode dispersion spectroscopy [1,2]. They require scanning the cavity resonances to obtain information about their width and position, yielding information about molecular absorption and dispersion. Previously they used continuous wave lasers, showing signal-to-noise ratio and resolution similar to the well-established cavity ring-down spectroscopy. However in this implementation they shared the same limits of measurement range and relatively slow acquisition. Meanwhile the optical frequency comb-based cavity-enhanced FTS with sub-nominal resolution [3,4] is a perfect match for those methods, allowing for simultaneous measurement of thousands of cavity modes without the limit of cavity dispersion and the requirement of a reference measurement [5]. Here we present the measurements of 10 kHz HWHM cavity resonances, which are some of the narrowest features ever measured by the FTS, from which we derive the absorption and dispersion spectra of the 0-3 band of CO in Ar. 1. A. Cygan et al., Opt. Express 21-24, 29744-29754 (2013). 2. A. Cygan et al., J. Chem. Phys. 144, 214202-11 (2016). 3. P. Maslowski et al., Phys. Rev. A 93, 021802(R) (2016). 4. L. Rutkowski et al., Journal of Quantitative Spectroscopy and Radiative Transfer 204, 63-73 (2018). 5. L. Rutkowski et al., Opt. Express 25-18, 21711-21718 (2017).

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

eng

Permalink

http://hdl.handle.net/2142/100461

DOI

10.15278/isms.2018.TG09

Copyright and License Information

Copyright 2018 Dominik Charczun

Owning Collections