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Title: Dynamics of spin-VCSELs
Author: Schires, K. R.
Awarding Body: University of Essex
Current Institution: University of Essex
Date of Award: 2013
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This work investigates experimentally the nonlinear dynamics of telecom-wavelength Vertical-Cavity Surface-Emitting Lasers (VCSELs) and spin-VCSELs. The aim of this study is to gain a broad understanding of the dynamics of commercial 1550nm-VCSELs under polarised optical injection as well as that of solitary 1300 DID spin-VCSELs, by comparing novel experimental work to a theoretical study of the dynamics based on the Spin Flip Model performed in parallel by Dr. Rihab Al Seyab. We first report a comprehensive experimental study of the dynarnics of 1550nm-VCSELs under polarised optical injection based on a variety of time-averaged and real-time measurements. Different types of data processing and representation are used to give new insigbts into the nonlinear dynamics of the optically-injected devices. An important aspect of the dynamics revealed by this study is their possible temporal instability. Excellent agreement is found between polarisation-resolved measurements of the dynamics and theoretical results in the case of optical injection with arbitrary polarisation. We also present the first optically-pumped 1300 run spin-VCSEL and demonstrate room temperature optical spin injection up to high degrees of ellipticity under continuous-wave operation. Finally, self-induced oscillations of the spin-VCSEL and their dependence on the pump polarisation are studied, and very good agreement is found with theoretical predictions.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available