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Theoretical studies of picosecond pulse generation in gain-switched DFB lasers

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dc.contributor.author DOBROVOLSCHI, V.
dc.contributor.author SANDULEAC, I.
dc.contributor.author TRONCIU, V.
dc.date.accessioned 2024-11-26T13:49:26Z
dc.date.available 2024-11-26T13:49:26Z
dc.date.issued 2024
dc.identifier.citation DOBROVOLSCHI, V.; I. SANDULEAC and V.TRONCIU. Theoretical studies of picosecond pulse generation in gain-switched DFB lasers. In: Materials Science and Condensed-Matter Physics: MSCMP: 10th International Conference dedicated to the 60th anniversary from the foundation of the Institute of Applied Physics, October 1-4, 2024. Book of abstracts. Chişinău: CEP USM, 2024, p. 63. ISBN 978-9975-62-763-4. en_US
dc.identifier.isbn 978-9975-62-763-4
dc.identifier.uri http://repository.utm.md/handle/5014/28631
dc.description Only Abstract. en_US
dc.description.abstract During recent years, picoseconds optical pulses find different applications in free-space communications, bio-analytics, sensing, distance measurements, material processing, and spectroscopy. Such pulses can be generated by diode lasers. Moreover, diode lasers in addition with other types of lasers as solid state and fibre lasers can improve the pulse energy and peak power of pulses. Therefore, the theoretical and experimental efforts have been performed to improve the performance of pulsed diode lasers [1-3]. We consider in this paper the generation of picosecond pulses by gain-switching of distributed feedback ridge-waveguide laser diode shown in Fig. 1. The model investigated in this paper aims to simulate the mode competition between the Bragg-mode and the residual Fabry-Pérot modes during switch-on of a DFB laser [4]. The rate equation model for Fabry-Perot modes FP and Bragg mode B are treated separately coupled with one equation for charge carriers n. We integrate numerically the above equations by studying the influence of different parameters on dynamics of pulses. We investigate the impact of the gain-compression factor on peak power, pulse energy and pulse width. Figure 2 shows a typical temporal behaviour of the optical power at the front facet of laser and the evolution of curriers (black line) under the influence of pulse current (red line). en_US
dc.language.iso en en_US
dc.publisher Institute of Applied Physics, Moldova State University en_US
dc.rights Attribution-NonCommercial-NoDerivs 3.0 United States *
dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/3.0/us/ *
dc.subject lasers en_US
dc.subject pulsed diode en_US
dc.subject DFB laser en_US
dc.title Theoretical studies of picosecond pulse generation in gain-switched DFB lasers en_US
dc.type Article en_US


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