High-Power, Narrow-Linewidth Distributed-Feedback Quantum-Cascade Laser for Molecular Spectroscopy
Quantum cascade lasers are versatile light sources in the mid-infrared range for molecular spectroscopy which find a wide range of applications from high-resolution studies to sensing. While devices with either high power or narrow spectral linewidth have previously been reported, there is still a l...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-08-01
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| Series: | Photonics |
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| Online Access: | https://www.mdpi.com/2304-6732/9/8/589 |
| _version_ | 1797442637736706048 |
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| author | Mathieu Bertrand Aleksandr Shlykov Mehran Shahmohamadi Mattias Beck Stefan Willitsch Jérôme Faist |
| author_facet | Mathieu Bertrand Aleksandr Shlykov Mehran Shahmohamadi Mattias Beck Stefan Willitsch Jérôme Faist |
| author_sort | Mathieu Bertrand |
| collection | DOAJ |
| description | Quantum cascade lasers are versatile light sources in the mid-infrared range for molecular spectroscopy which find a wide range of applications from high-resolution studies to sensing. While devices with either high power or narrow spectral linewidth have previously been reported, there is still a lack of sources combining both of these characteristics which are particularly important for precision measurements of weak spectroscopic transitions. In this article, we describe and characterize a novel master-oscillator power-amplifier distributed-feedback quantum cascade laser designed to fill this gap. At an output power of 300 mW, the device features a free-running linewidth of 1.3 MHz, measured with a frequency discriminator technique, at an emission wavenumber of 2185 cm<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mrow><mo>−</mo><mn>1</mn></mrow></msup></semantics></math></inline-formula>. This linewidth is sufficiently narrow to enable a further reduction by a tight lock to a high-Q oscillator. |
| first_indexed | 2024-03-09T12:44:50Z |
| format | Article |
| id | doaj.art-607f3597fb4a4b74a22a2775b228fd5b |
| institution | Directory Open Access Journal |
| issn | 2304-6732 |
| language | English |
| last_indexed | 2024-03-09T12:44:50Z |
| publishDate | 2022-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Photonics |
| spelling | doaj.art-607f3597fb4a4b74a22a2775b228fd5b2023-11-30T22:13:46ZengMDPI AGPhotonics2304-67322022-08-019858910.3390/photonics9080589High-Power, Narrow-Linewidth Distributed-Feedback Quantum-Cascade Laser for Molecular SpectroscopyMathieu Bertrand0Aleksandr Shlykov1Mehran Shahmohamadi2Mattias Beck3Stefan Willitsch4Jérôme Faist5Institute for Quantum Electronics, ETH Zurich, 8093 Zurich, SwitzerlandDepartment of Chemistry, University of Basel, 4056 Basel, SwitzerlandInstitute for Quantum Electronics, ETH Zurich, 8093 Zurich, SwitzerlandInstitute for Quantum Electronics, ETH Zurich, 8093 Zurich, SwitzerlandDepartment of Chemistry, University of Basel, 4056 Basel, SwitzerlandInstitute for Quantum Electronics, ETH Zurich, 8093 Zurich, SwitzerlandQuantum cascade lasers are versatile light sources in the mid-infrared range for molecular spectroscopy which find a wide range of applications from high-resolution studies to sensing. While devices with either high power or narrow spectral linewidth have previously been reported, there is still a lack of sources combining both of these characteristics which are particularly important for precision measurements of weak spectroscopic transitions. In this article, we describe and characterize a novel master-oscillator power-amplifier distributed-feedback quantum cascade laser designed to fill this gap. At an output power of 300 mW, the device features a free-running linewidth of 1.3 MHz, measured with a frequency discriminator technique, at an emission wavenumber of 2185 cm<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mrow><mo>−</mo><mn>1</mn></mrow></msup></semantics></math></inline-formula>. This linewidth is sufficiently narrow to enable a further reduction by a tight lock to a high-Q oscillator.https://www.mdpi.com/2304-6732/9/8/589QCLlinewidthspectroscopy |
| spellingShingle | Mathieu Bertrand Aleksandr Shlykov Mehran Shahmohamadi Mattias Beck Stefan Willitsch Jérôme Faist High-Power, Narrow-Linewidth Distributed-Feedback Quantum-Cascade Laser for Molecular Spectroscopy Photonics QCL linewidth spectroscopy |
| title | High-Power, Narrow-Linewidth Distributed-Feedback Quantum-Cascade Laser for Molecular Spectroscopy |
| title_full | High-Power, Narrow-Linewidth Distributed-Feedback Quantum-Cascade Laser for Molecular Spectroscopy |
| title_fullStr | High-Power, Narrow-Linewidth Distributed-Feedback Quantum-Cascade Laser for Molecular Spectroscopy |
| title_full_unstemmed | High-Power, Narrow-Linewidth Distributed-Feedback Quantum-Cascade Laser for Molecular Spectroscopy |
| title_short | High-Power, Narrow-Linewidth Distributed-Feedback Quantum-Cascade Laser for Molecular Spectroscopy |
| title_sort | high power narrow linewidth distributed feedback quantum cascade laser for molecular spectroscopy |
| topic | QCL linewidth spectroscopy |
| url | https://www.mdpi.com/2304-6732/9/8/589 |
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