Frequency response of polarization switching in different types of VCSELs

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J. Danckaert1, G. Verschaffelt1, J. Albert1, B. Nagler1, M. Peeters1, K. Panajotov1, L. Desmet1, G. Van der Sande1, H. Thienpont1, I. Veretennicoff1, S. Barbay2,3, G. Giacomelli2, F. Marin4
1Department of Applied Physics and Photonics (TW-TONA), Vrije Universiteit Brussel, Brussels, Belgium
2Istituto Nazionale di Ottica Applicata and INFM, Florence, Italy
3Laboratoire de Photonique et de Nanostrucures, Florence, France
4Department of Physics, University of Firenze and INFM and LENS, Florence, Italy

Tóm tắt

One of the most intriguing properties of VCSELs is the polarization state of the emitted light. In some VCSELs, abrupt polarization switching (PS) between two polarization modes (PMs) is observed when the injected current is changed. The different mechanisms proposed to explain this phenomenon can be classified into two categories: those invoking slow (lattice) thermal mechanisms and those relying on other, faster mechanisms. In the present work we investigate the dynamics and the associated dominating time scales of PS.

Từ khóa

#Frequency response #Vertical cavity surface emitting lasers #Optical polarization #Cutoff frequency #Physics #Steady-state #Current measurement #Frequency measurement #Frequency modulation #Amplitude modulation

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