Gain-switched short pulse generation from InAs-InP (1 1 3)B quantum dot laser excited state

Dogru, Nuran; Tunc, Hilal S. Duranoglu; Al-Dabbagh, Ali Mumtaz

doi:10.1016/j.optlastec.2021.107709

Cited by 5 publications

(1 citation statement)

References 25 publications

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“…However, without EOGB the output pulses are strongly affected by the change in the laser parameters. Similar results were also obtained for InAs-InP (113)B quantum dot laser based on single mode rate equations [26].…”

Section: Output Pulsesupporting

confidence: 81%

Gain-Switched Short Pulse Generation from 1.55 µM InAs/InP/(113)B Quantum Dot Laser Modelled Using Multi-Population Rate Equations

Tunc¹,

Dogru²,

Cengiz³

2022

Preprint

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For the first time the gain switching properties of an InAs-InP (113)B quantum dot laser are examined theoretically in detail to generate shorter pulses with the application of a Gaussian pulse beam to the laser excited state. The multi population rate equations considering nonlinear gain are solved by the Runge –Kutta method. The numerical results demonstrated that as the homogeneous and the inhomogeneous broadening increase, the differential gain, the gain compression factor and the threshold current of excited state decrease, while threshold current of ground state increases. It was also observed that the contribution of the excited state to gain-switched output pulses depends on not only the value of the inhomogeneous broadening but also the magnitude of the applied current. Finally it was shown that without an optical beam, output pulse has long pulse width due to ground state emission, whereas with an optical beam, narrow pulses having high peak power owing to the excited state emission are generated even though at low currents.

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Section: Output Pulsesupporting

confidence: 81%

Gain-Switched Short Pulse Generation from 1.55 µM InAs/InP/(113)B Quantum Dot Laser Modelled Using Multi-Population Rate Equations

Tunc¹,

Dogru²,

Cengiz³

2022

Preprint

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Modelling and experimental characterization of double layer InP/AlGaInP quantum dot laser

Abbas,

Sabry,

Omran

et al. 2023

Opt Quant Electron

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Spectrum of an InP/AlGaInP self- assembled double-layer quantum dot (QD) laser fabricated by metal–organic vapor-phase epitaxy is theoretically and experimentally investigated. A bimodal QD size distribution (small and large QD groups) was detected which is formed during the fabrication. A model is proposed based on rate equations accounting for the superposition of two inhomogeneous QD groups. The total output power and the power spectral density (PSD) of the fabricated QD laser are experimentally characterized at room temperature. The output spectrum is segmented into the sum of two Gaussians curves (super Gaussian) belonging to the small and large QD groups. The peak PSD and the spectral width of each group are extracted and their dependency on the injected current density is analysed. The peak of the large QDs is found to be dominant at small current while the peak of the small QDs dominated at high current alongside a reduction in its spectral width leading to lasing based on them. This behaviour is attributed to the saturation of the large QDs energy levels due to its relatively long radiative lifetime. The experimental analysis is in a good agreement with the theoretical results.

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Intensity Noise of Gain-Switched Quantum Dot Laser Based on Multi-Population Rate Equations

Dogru

Tunc

Cengiz

2023

2023 23rd International Conference on Transparent Optical Networks (ICTON)

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Gain-switched short pulse generation from InAs-InP (1 1 3)B quantum dot laser excited state

Cited by 5 publications

References 25 publications

Gain-Switched Short Pulse Generation from 1.55 µM InAs/InP/(113)B Quantum Dot Laser Modelled Using Multi-Population Rate Equations

Gain-Switched Short Pulse Generation from 1.55 µM InAs/InP/(113)B Quantum Dot Laser Modelled Using Multi-Population Rate Equations

Modelling and experimental characterization of double layer InP/AlGaInP quantum dot laser

Intensity Noise of Gain-Switched Quantum Dot Laser Based on Multi-Population Rate Equations

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