Picture of athlete cycling

Open Access research with a real impact on health...

The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by Strathclyde researchers, including by researchers from the Physical Activity for Health Group based within the School of Psychological Sciences & Health. Research here seeks to better understand how and why physical activity improves health, gain a better understanding of the amount, intensity, and type of physical activity needed for health benefits, and evaluate the effect of interventions to promote physical activity.

Explore open research content by Physical Activity for Health...

Abrupt turn-on and hysteresis in a VCSEL with frequency-selective optical feedback

Naumenko, Alexander and Loiko, Natalia and Sondermann, Markus and Jentsch, Karl and Ackemann, Thorsten (2006) Abrupt turn-on and hysteresis in a VCSEL with frequency-selective optical feedback. Optics Communications, 259 (2). pp. 823-833. ISSN 0030-4018

[img] PDF (Naumenko-etal-OC2006-abrupt-turn-on-and-hysteresis-in-a-vcsel)
Naumenko_etal_OC2006_abrupt_turn_on_and_hysteresis_in_a_vcsel.pdf - Accepted Author Manuscript

Download (3MB)

Abstract

The emission characteristics of a vertical-cavity surface-emitting laser (VCSEL) operated in a single-transverse mode and coupled to an external cavity with a diffraction grating as a frequency-selective element are analyzed experimentally, numerically and analytically. The experiments yield a rather abrupt turn-on of the VCSEL to a high-amplitude emission state and hysteresis phenomena. The experimental results are explained by numerical simulations and analytical calculations demonstrating the possibility of bistability between lasing and non-lasing states close to threshold. Hence, the scheme might be useful in all-optical photonic switching applications. A detailed bifurcation analysis near threshold is given by superimposing the numerical results with analytical steady-state curves. The mode selection and switching behavior obtained in the simulations can be interpreted from the point of view of the preference of states with the minimal total losses.