Generation of an internally circulating mode in high-power superluminescent diodes with a grazing-stripe waveguide
Gordeev N. Yu. 1, Shernyakov Yu. M. 1, Kornyshov G. O. 1, Simchuk O.I. 2, Beckman A. A. 1, Payusov A.S. 1, Salii Yu. A 1, Kulagina M. M. 1, Maximov M.V. 2
1Ioffe Institute, St. Petersburg, Russia
2Alferov Federal State Budgetary Institution of Higher Education and Science Saint Petersburg National Research Academic University of the Russian Academy of Sciences, St. Petersburg, Russia
Email: gordeev@switch.ioffe.ru, yuri.shernyakov@mail.ioffe.ru, gk@mail.ioffe.ru, osmailbox@yahoo.com, spbgate21@gmail.com, plusov@mail.ioffe.ru, guseva.ja@gmail.com, marina.kulagina@mail.ioffe.ru, maximov.mikh@gmail.com

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The features of the occurrence of internally circulating modes in superluminescent diodes with a grazing-stripe waveguide with an active region based on 5 layers of InGaAs/GaAs quantum well-dots emitting in the range 1 μm are studied. A simple qualitative model is proposed that explains the decrease in the threshold current with an increase in the pump pulse duration. Approaches for suppressing internally circulating modes are proposed, which can significantly increase the output optical power of superluminescent diodes. Keywords: quantum well-dots, optical waveguide, superluminescent diode, internally circulating mode.
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