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Semiconductor Quantum Well Lasers With a Temperature-Insensitive Threshold Current

Marko, IP (2015) Semiconductor Quantum Well Lasers With a Temperature-Insensitive Threshold Current [Dataset]

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Sweeney, Stephen, JUNSPECIFIED
Description : This paper proposes and demonstrates a new multiquantum well (MQW) laser structure with a temperature-insensitive threshold current and output power. Normally, the mechanisms that cause the threshold current (I_th) of semiconductor lasers to increase with increasing temperature T (thermal broadening of the gain spectrum, thermally activated carrier escape, Auger recombination, and intervalence band absorption) act together to cause (I_th) to increase as T increases. However, in the design presented here, carriers thermally released from some of the QWs are fed to the other QWs so that these mechanisms compensate rather than augment one another. The idea is in principle applicable to a range of materials systems, structures, and operating wavelengths. We have demonstrated the effect for the first time in 1.5 μm GaInAsP/InP Fabry–Perot cavity edge-emitting lasers. The results showed that it is possible to keep the threshold current constant over a temperature range of about 100 K and that the absolute temperature over which the plateau occurred could be adjusted easily by redesigning the quantum wells and the barriers between them. TEM studies of the structures combined with measurements of the electroluminescent intensities from the wells are presented and explain well the observed effects.
Publication Year of Data : 2015
Publication Date of Paper : 2015
Creation Dates : 2012
Funder : EPSRC
Identification Number : 10.15126/surreydata.00807588
Grant Title : Efficient Photonic Devices for Near- and Mid-Infrared Applications
Access Statement : Due to confidentiality agreements with research collaborators, supporting data can only be made available to bona fide researchers subject to a non-disclosure agreement.
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External Data Location : Internal Location
Data Format : txt-data files, origing graphs, images
Discipline : Physics
Keywords : diode lasers, quantum well, temperature dependence, thermal stability
Depositing User : Symplectic Elements
Date Deposited : 01 May 2015 08:35
Last Modified : 09 Feb 2016 16:40

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