25 February 2010 Analysis and characterization of the small-signal modulation of a vertical external cavity surface emitting laser
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Abstract
The small signal modulation of a vertical external cavity surface emitting laser (VECSEL) is examined. The modulation transfer function (MTF) of the cavity is measured for multiple photon lifetimes operating between Class A and Class B regimes, where the photon and carrier lifetimes are of the same order. Three coupled ordinary differential equations with similarities to an electrically-injected quantum-well laser with a separate confinement heterostructure are used to mathematically describe the time-dependant VECSEL response. We present a series of measurements that provide important laser parameters such as internal device losses and differential gain. The VECSEL operating in this regime is an overdamped oscillator and has free-running characteristics that are not unlike quantum-dot and quantum-cascade lasers.
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N. Terry, N. Terry, M. Walton, M. Walton, R. Bedford, R. Bedford, } "Analysis and characterization of the small-signal modulation of a vertical external cavity surface emitting laser", Proc. SPIE 7597, Physics and Simulation of Optoelectronic Devices XVIII, 75972B (25 February 2010); doi: 10.1117/12.852283; https://doi.org/10.1117/12.852283
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