High-resolution and gapless dual comb spectroscopy with current-tuned quantum cascade lasers

被引：44

作者：

Gianella, Michele ^{[1
]}

Nataraj, Akshay ^{[1
]}

Tuzson, Bela ^{[1
]}

Jouy, Pierre ^{[2
]}

Kapsalidis, Filippos ^{[3
]}

Beck, Mattias ^{[3
]}

Mangold, Markus ^{[2
]}

Hugi, Andreas ^{[2
]}

Faist, Jerome ^{[3
]}

Emmenegger, Lukas ^{[1
]}

机构：

[1] Empa, Lab Air Pollut & Environm Technol, CH-8600 Dubendorf, Switzerland

[2] IRsweep AG, Laubisrutistr 44, CH-8712 Stafa, Switzerland

[3] Swiss Fed Inst Technol, Inst Quantum Elect, CH-8093 Zurich, Switzerland

来源：

OPTICS EXPRESS | 2020年 / 28卷 / 05期

基金：

瑞士国家科学基金会;

关键词：

FOURIER-TRANSFORM SPECTROSCOPY; FREQUENCY-COMB;

D O I：

10.1364/OE.379790

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present gapless, high-resolution absorption and dispersion spectra obtained with quantum cascade laser frequency combs covering 55 cm(-1). Using phase-sensitive dual comb design, the comb lines are gradually swept over 10 GHz, corresponding to the free spectral range of the laser devices, by applying a current modulation. We show that with interleaving the spectral point spacing is reduced by more than four orders of magnitude over the full spectral span of the frequency comb. The potential of this technique for high-precision gas sensing is illustrated by measuring the low pressure (107 hPa) absorption and dispersion spectra of methane spanning the range of 1170 cm(-1) - 1225 cm(-1) with a resolution of 0.001 cm(-1). (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

引用

页码：6197 / 6208

页数：12

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