Experimental and theoretical investigations on the modulation capabilities of a sample of vertical cavity surface emitting laser diodes for atomic vapour applications.

Autor: Amtmann, Christoph, Lammegger, Roland, Betzler, Alexander, Agú, Martín, Ellmeier, Michaela, Hagen, Christian, Jernej, Irmgard, Magnes, Werner, Pollinger, Andreas, Ernst, Wolfgang E.
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Zdroj: Applied Physics B: Lasers & Optics; Feb2023, Vol. 129 Issue 2, p1-12, 12p
Abstrakt: This paper discusses various frequency modulation and intensity modulation capabilities within a sample of direct laser current modulated identical vertical cavity surface emitting laser diodes. The presented analysis is based on measurements of the spectral amplitudes as a function of the applied modulation power at a constant modulation frequency of 3.517 GHz. Their evaluation by Bessel function fits produces the three modulation parameters: frequency modulation index, intensity modulation index (via the α parameter) and the side band asymmetry of the first order side bands. The variation of the laser diode's modulation capability is discussed. It is found that the individual laser diodes show a significant variations in their modulation capabilities. Thus an experimental preselection of the laser diode is required to find laser diodes which are suitable as a light source for atomic vapour applications, with special emphasis on a coherent population trapping-based scalar magnetometers. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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