Mode beating in spot-size converter lasers

Wijnands, F. H.G.M. et al. (2002) Mode beating in spot-size converter lasers. Optical and Quantum Electronics, 34(10), pp. 959-973. (doi: 10.1023/A:1020425610870)

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An anomalous modulation in the wavelength spectrum has been observed in lasers with spot-size converters. This intensity modulation is shown to be caused by beating between the fundamental lasing mode and radiation modes in the taper. This results in a periodic modulation in the net gain spectrum, which causes wavelength jumps between adjacent net gain maxima, and a drive current dependent spectral width that is expected to affect system performance. The amplitude of this spectral modulation is reduced significantly by either using an angled rear-facet which reflects the beating radiation modes away from the laser axis, or by using a nonlinear, adiabatic taper.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Kelly, Professor Anthony
Authors: Wijnands, F. H.G.M., Crookes, C. G., Charles, P. M., Ash, R. M., Lealman, I. F., Robertson, M. J., Kelly, A., Williams, K. A., Massara, A. B., Penty, R. V., and White, I. H.
College/School:College of Science and Engineering > School of Engineering > James Watt Nanofabrication Centre
Journal Name:Optical and Quantum Electronics

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