Scientific Results

Lineshape and frequency noise of a Vertical Cavity Surface Emitting Laser

Year: 2000

Authors: Viciani S., Marin F.

Autors Affiliation: Dipartimento di Fisica, Università di Firenze, LENS, INFM Unità di Firenze, Firenze (FI), Italy

Abstract: Summary form only given. VCSELs are very original semiconductor lasers from different points of view, namely the short, high Q cavity; several transverse modes and gain guiding. with possible linewidth enhancement; different current injection mechanisms, for which the current noise can strongly influence the effective cavity length; strong thermal effects. For all these reasons, an accurate study of the frequency noise and of the lineshape of VCSELs is very interesting. We have performed such a study on a air-post VCSEL with an emission wavelength of 770 nm. We have recorded the lineshape at different injection current levels by heterodyne with a narrow linewidth extended cavity laser while the frequency noise spectrum is investigated using a Fabry-Perot cavity and frequency discriminator.

Conference title:
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KeyWords: Cavity resonators; Electric currents; Laser resonators; Light polarization; Optical pumping, Fabry Perot cavities; Frequency noise; Vertical cavity surface emitting laser (VCSEL), Semiconductor lasers

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