Publisher DOI: 10.3390/photonics8100443
Title: Interferometric technique for the spectral characterization of high frequency current-modulated mid-infrared semiconductor lasers
Language: English
Authors: Bahr, Marc-Simon  
Wolff, Marcus  
Keywords: Current modulation; High-resolution spectroscopy; Interband cascade laser; Michelson interferometer
Issue Date: 14-Oct-2021
Publisher: MDPI
Journal or Series Name: Photonics 
Volume: 8
Issue: 10
Project: Entwicklung eines KI-basierten Sensors zur Bestimmung der isotopologischen Zusammensetzung von Treibhausgasen für die Erforschung klimatischer Prozesse 
Abstract: 
We describe two methods, based on Michelson interferometery, that enable the determination of the absolute wavelength of current-modulated semiconductor lasers. By non-linear regression of the instantaneous frequency of the interference signal, the rate of change of the wavelength of the radiation can be inferred. Alternatively, the absolute wavelength can be directly calculated from the maxima and minima of the interference signal. In both cases a reference absorption line enables the determination of the absolute wavelength. Both methods offer respective advantages. The methods allow a highly resolved wavelength measurement under lower kilohertz range current-modulation with relatively little effort. As a result, we present the rates of wavelength change and absolute wavelengths exemplarily for a specific interband cascade laser. It is furthermore shown that the spectral dynamic range of the laser decreases with increasing modulation frequency.
URI: http://hdl.handle.net/20.500.12738/12196
ISSN: 2304-6732
Review status: This version was peer reviewed (peer review)
Institute: Fakultät Technik und Informatik 
Department Maschinenbau und Produktion 
Heinrich-Blasius-Institut für Physikalische Technologien 
Type: Article
Additional note: article number : 443
Funded by: Bundesministerium für Umwelt, Naturschutz und nukleare Sicherheit 
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