Thermal performance of 1.55μm InGaAlAs quantum well buried heterostructure lasers
Sayid, SA, Marko, IP, Cannard, PJ, Chen, X, Rivers, LJ, Lealman, IF and Sweeney, SJ (2010) Thermal performance of 1.55μm InGaAlAs quantum well buried heterostructure lasers In: 22nd IPRM, 2010-05-31 - 2010-06-04, Kagawa, Japan.
Thermal performance of 1.55μm InGaAlAs quantum well buried heterostructure lasers.pdf
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We have investigated the threshold current Ith and differential quantum efficiency as the function of temperature in InGaAlAs/InP multiple quantum well (MQWs) buried heterostructure (BH) lasers. We find that the temperature sensitivity of Ith is due to non-radiative recombination which accounts for up to ~80% of Jth at room temperature. Analysis of spontaneous emission emitted from the devices show that the dominant non-radiative recombination process is consistent with Auger recombination. We further show that the above threshold differential internal quantum efficiency, ηi, is ~80% at 20°C remaining stable up to 80°C. In contrast, the internal optical loss, αi, increases from 15 cm-1 at 20°C to 22 cm-1 at 80°C, consistent with inter-valence band absorption (IVBA). This suggests that the decrease in power output at elevated temperatures is associated with both Auger recombination and IVBA.
|Item Type:||Conference or Workshop Item (Conference Paper)|
|Divisions :||Faculty of Engineering and Physical Sciences > Physics|
|Identification Number :||https://doi.org/10.1109/ICIPRM.2010.5516088|
|Additional Information :||© 2010 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.|
|Depositing User :||Symplectic Elements|
|Date Deposited :||19 Dec 2012 18:46|
|Last Modified :||23 Sep 2013 19:47|
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