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

被引：3

作者：

Amtmann, Christoph ^{[1
]}

Lammegger, Roland ^{[1
]}

Betzler, Alexander ^{[1
]}

Agu, Martin ^{[2
]}

Ellmeier, Michaela ^{[2
]}

Hagen, Christian ^{[2
]}

Jernej, Irmgard ^{[2
]}

Magnes, Werner ^{[2
]}

Pollinger, Andreas ^{[2
]}

Ernst, Wolfgang E. ^{[1
]}

机构：

[1] Graz Univ Technol, Inst Expt Phys, Petersgasse 16, A-8010 Graz, Austria

[2] Austrian Acad Sci, Space Res Inst, Schmiedlstr 6, A-8042 Graz, Austria

来源：

APPLIED PHYSICS B-LASERS AND OPTICS | 2023年 / 129卷 / 02期

关键词：

Vertical cavity surface emitting laser; VCSEL; Direct laser current modulation; Frequency modulation; Intensity modulation; Atomic vapour; DARK STATE MAGNETOMETER;

D O I：

10.1007/s00340-023-07971-7

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

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 a 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 suit-able as a light source for atomic vapour applications, with special emphasis on a coherent population trapping-based scalar magnetometers.

引用

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