Relative intensity noise of vertical-cavity surface-emitting lasers subject to variable polarization-optical feedback

Ahmed, Salam Nazhan, Ghassemlooy, Zabih, Busawon, Krishna and Zvanovec, Stanislav (2014) Relative intensity noise of vertical-cavity surface-emitting lasers subject to variable polarization-optical feedback. In: 2014 3rd International Workshop in Optical Wireless Communications, IWOW 2014, 17 September 2014, Funchal, Portugal.

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Abstract

In this paper, the influence of variable polarization angle of the optical feedback on the relative intensity noise (RIN) of a vertical-cavity surface-emitting laser (VCSEL) is experimentally investigated. VCSEL lases in two orthogonally polarized (XP and YP) modes. For the dominant polarization mode (i.e. XP) the RIN is minimum at a polarization angle of 0°, while it is a minimum at 90° for the suppressed polarization mode (YP) it is minimum at a polarization angle of 90°. Furthermore, for a high optical feedback level the RIN of the XP mode increases rapidly with the polarization angle, whereas for the YP mode the RIN is low for angles > 45°. In addition, result shows that the relaxation oscillations are damped due to the optical feedback. We also show that as the polarization angle of the optical feedback increases a number of spectral lines appear in VCSEL spectrum, thus representing the complex dynamics behavior induced by the feedback.

Item Type:	Conference or Workshop Item (Paper)
Uncontrolled Keywords:	optical feedback, polarization switching, Relative intensity noise, vertical-cavity surface emitting lasers
Subjects:	H600 Electronic and Electrical Engineering
Department:	Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User:	Users 6424 not found.
Date Deposited:	11 Dec 2014 15:17
Last Modified:	12 Oct 2019 19:08
URI:	http://nrl.northumbria.ac.uk/id/eprint/18477

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