Stripe excitation of high gain media with disorder
Herrnsdorf, Johannes and Chen, Yujie and Guilhabert, Benoit Jack Eloi and Laurand, Nicolas and Dawson, Martin (2012) Stripe excitation of high gain media with disorder. IEEE Journal of Quantum Electronics, 48 (9). pp. 1184-1192. ISSN 0018-9197 (https://doi.org/10.1109/JQE.2012.2204959)
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We discuss the spatial and spectral intensity distribution of emission in optical gain media under stripe excitation in the case where the intensity reaches saturation level. It is found that modes propagating along the stripe in different directions are spatially separated if they affect each other due to saturation. The investigation includes the effects of wavelength-dependent inhomogenities, such as localized losses and reflective perturbations. Even relatively small distortions of this kind are found to cause considerable spatial and spectral redistribution of the intensity compared to an ideal disorder-free medium. Our results indicate that a simple ansatz may describe some mechanisms that lead to the formation of random laser action that is commonly observed in high gain media, such as organic semiconductors. Furthermore, consequential difficulties of gain measurements in such media using stripe excitation experiments are highlighted.
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Item type: Article ID code: 43067 Dates: DateEventSeptember 2012PublishedSubjects: Science > Physics Department: Faculty of Science > Physics > Institute of Photonics
Faculty of Science > Physics
Technology and Innovation Centre > PhotonicsDepositing user: Pure Administrator Date deposited: 01 Mar 2013 19:11 Last modified: 08 Apr 2024 20:23 URI: https://strathprints.strath.ac.uk/id/eprint/43067