Conference
High-resolution Comb-based Fourier Transform Spectroscopy In The 3.3 μm And 7.8 μm Range
| العنوان: | High-resolution Comb-based Fourier Transform Spectroscopy In The 3.3 μm And 7.8 μm Range |
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| المؤلفون: | Foltynowicz, Aleksandra |
| المساهمون: | Soboń, Grzegorz, Tomaszewska, Dorota, Gluszek, Aleksander, Hudzikowski, Arkadiusz, Krzempek, Karol, Stuhr, Michael, Sadiek, Ibrahim, Senna Vieira, Francisco, Lu, Chuang, Germann, Matthias, Hjältén, Adrian |
| بيانات النشر: | International Symposium on Molecular Spectroscopy |
| سنة النشر: | 2021 |
| المجموعة: | University of Illinois at Urbana-Champaign: IDEALS (Illinois Digital Environment for Access to Learning and Scholarship) |
| مصطلحات موضوعية: | Instrument/Technique Demonstration |
| الوصف: | We use Fourier transform spectrometers based on mid-infrared frequency combs to measure and analyze broadband spectra of molecules of environmental importance in the two water windows around 3.3 $\mu$m and 7.8 $\mu$m. Both comb sources are based on difference frequency generation (DFG) using signal and pump waves derived from a single femtosecond laser, and are therefore inherently carrier-envelope-offset-free, which simplifies their frequency stabilization [1,2]. We use the sub-nominal sampling-interleaving method to measure spectra with resolution limited by the comb-mode linewidth [3,4]. At 3.3 $\mu$m, we measured high-resolution spectra of multiple absorption bands of two halogenated volatile organic compounds, methyl iodide, CH$_3$I [5], and dibromomethane, CH$_2$Br$_2$. We assigned the $\nu$$_4$ band of CH$_3$I with improved accuracy compared to previous work based on FTIR measurements [6]. At 7.8 $\mu$m, we measured the spectrum of the $\nu$$_1$ band of $^{14}$N$_2$$^{16}$O and retrieved line center frequencies with precision of the order of 100 kHz [7], in excellent agreement with previous high-accuracy measurement using a comb-referenced continuous wave quantum cascade laser [8]. [1] G. Sobon et al., Opt. Lett. 42, 1748 (2017). [2] K. Krzempek et al., Opt. Express 27, 37435 (2019). [3] P. Maslowski et al., Phys. Rev. A 93, 021802(R) (2016). [4] L. Rutkowski et al., J. Quant. Spectrosc. Radiat. Transf. 204, 63 (2018). [5] I. Sadiek et al., J. Quant. Spectrosc. Radiat. Transf. 255, 107263, 107263 (2020). [6] R. Anttila et al., J. Mol. Spectrosc. 119, 190 (1986). [7] A. Hjältén et al., in preparation. [8] B. AlSaif, et al., J. Quant. Spectrosc. Radiat. Transf. 211, 172 (2018). |
| نوع الوثيقة: | conference object |
| اللغة: | English |
| Relation: | http://hdl.handle.net/2142/111247 |
| DOI: | 10.15278/isms.2021.TB05 |
| الاتاحة: | http://hdl.handle.net/2142/111247 https://doi.org/10.15278/isms.2021.TB05 |
| رقم الانضمام: | edsbas.4A9CC622 |
| قاعدة البيانات: | BASE |
| DOI: | 10.15278/isms.2021.TB05 |
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