18 February 2013 Passively modelocked electrically pumped VECSELs
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Abstract
In modelocked electrically pumped VECSELs (EP-VECSELs) the gain saturation strongly influences the pulse formation. Here we present a detailed gain characterization of EP-VECSELs as published the first time in [1]. The spectral gain-distribution and the gain saturation behavior of two devices with different field-enhancement in the quantum-well gain layers are investigated. Comparing spectral bandwidth, small-signal gain and saturation fluence of the three devices, we chose the most suitable for modelocking experiments. Using a low-saturation fluence SESAM we have generated 9.5-ps-pulses with an average output-power of 7.6 mW at 1.4 GHz repetition-rate, which have been the shortest pulses from an EP-VECSEL to date [1].
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C. A. Zaugg, C. A. Zaugg, W. P. Pallmann, W. P. Pallmann, M. Mangold, M. Mangold, V. J. Wittwer, V. J. Wittwer, H. Moench, H. Moench, S. Gronenborn, S. Gronenborn, M. Miller, M. Miller, B. W. Tilma, B. W. Tilma, T. Südmeyer, T. Südmeyer, U. Keller, U. Keller, } "Passively modelocked electrically pumped VECSELs", Proc. SPIE 8606, Vertical External Cavity Surface Emitting Lasers (VECSELs) III, 86060G (18 February 2013); doi: 10.1117/12.2002391; https://doi.org/10.1117/12.2002391
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