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High-Temperature Continuous-Wave Single-Mode Operation of 1.3- \mu m p-Doped InAs–GaAs Quantum-Dot VCSELs

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6 Author(s)
Xu, D.W. ; Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore, Singapore ; Yoon, S.F. ; Tong, C.Z. ; Zhao, L.J.
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In this letter, we have demonstrated continuous-wave single-mode operation of 1.3-mum InAs-GaAs quantum-dot (QD) vertical-cavity surface-emitting lasers (VCSELs) with p-type modulation-doped QD active region from 20degC to 60degC. The highest output power of 0.435 mW and lowest threshold current of 1.2 mA under single-mode operation are achieved. The temperature-dependent output characteristics of QD-VCSELs are investigated. Single-mode operation with a sidemode suppression ratio of 34 dB is observed at room temperature. The critical size of oxide aperture for single-mode operation is discussed.

Published in:

Photonics Technology Letters, IEEE  (Volume:21 ,  Issue: 17 )