Determining the linewidth enhancement factor via optical feedback in quantum dot micropillar lasers

Steffen Holzinger; Sõren Kreinberg; Brett H. Hokr; Christian Schneider; Sven Höfling; Weng W. Chow; Xavier Porte; Stephan Reitzenstein

doi:10.1364/OE.26.031363

Determining the linewidth enhancement factor via optical feedback in quantum dot micropillar lasers

Steffen Holzinger, Sõren Kreinberg, Brett H. Hokr, Christian Schneider, Sven Höfling, Weng W. Chow, Xavier Porte, Stephan Reitzenstein

Research output: Contribution to journal › Article › peer-review

Abstract

The linewidth enhancement factor α is a key parameter determining the spectral and dynamical behavior of semiconductor lasers. Here, we propose and demonstrate a method for determining this parameter based on a direct measurement of variations in the laser gain and emission spectrum when subject to delayed optical feedback. We then use our approach to determine the pump current dependent linewidth enhancement factor of a high-β quantum dot micropillar laser. The validity of our approach is confirmed comparing it to two conventional methods, one based on the comparison of the linewidths above and below threshold and the other based on injection locking properties. Furthermore, the pump power dependence of α is quantitatively described by simulations based on a quantum-optical model.

Original language	English
Pages (from-to)	31363-31371
Journal	Optics Express
Volume	26
Issue number	24
DOIs	https://doi.org/10.1364/OE.26.031363
Publication status	Published - 14 Nov 2018

Access to Document

10.1364/OE.26.031363Licence: Other

Holzinger-2018-Determining-linewidth-OE-31363
© 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement. This is the final published version of the work, which was originally published at https://doi.org/10.1364/OE.26.031363
Final published version, 1.73 MBLicence: Other

Cite this

@article{2f3c61aa9a854a77a8d715257503ea65,

title = "Determining the linewidth enhancement factor via optical feedback in quantum dot micropillar lasers",

abstract = "The linewidth enhancement factor α is a key parameter determining the spectral and dynamical behavior of semiconductor lasers. Here, we propose and demonstrate a method for determining this parameter based on a direct measurement of variations in the laser gain and emission spectrum when subject to delayed optical feedback. We then use our approach to determine the pump current dependent linewidth enhancement factor of a high-β quantum dot micropillar laser. The validity of our approach is confirmed comparing it to two conventional methods, one based on the comparison of the linewidths above and below threshold and the other based on injection locking properties. Furthermore, the pump power dependence of α is quantitatively described by simulations based on a quantum-optical model.",

author = "Steffen Holzinger and S{\~o}ren Kreinberg and Hokr, {Brett H.} and Christian Schneider and Sven H{\"o}fling and Chow, {Weng W.} and Xavier Porte and Stephan Reitzenstein",

note = "Funding: European Research Council under the European Union{\textquoteright}s Seventh Framework Program (ERC Grant Agreement No. 615613); German Research Foundation (CRC 787); U.S. Department of Energy (Contract No. DE-AC04-94AL85000).",

year = "2018",

month = nov,

day = "14",

doi = "10.1364/OE.26.031363",

language = "English",

volume = "26",

pages = "31363--31371",

journal = "Optics Express",

issn = "1094-4087",

publisher = "OPTICAL SOC AMER",

number = "24",

}

TY - JOUR

T1 - Determining the linewidth enhancement factor via optical feedback in quantum dot micropillar lasers

AU - Holzinger, Steffen

AU - Kreinberg, Sõren

AU - Hokr, Brett H.

AU - Schneider, Christian

AU - Höfling, Sven

AU - Chow, Weng W.

AU - Porte, Xavier

AU - Reitzenstein, Stephan

N1 - Funding: European Research Council under the European Union’s Seventh Framework Program (ERC Grant Agreement No. 615613); German Research Foundation (CRC 787); U.S. Department of Energy (Contract No. DE-AC04-94AL85000).

PY - 2018/11/14

Y1 - 2018/11/14

N2 - The linewidth enhancement factor α is a key parameter determining the spectral and dynamical behavior of semiconductor lasers. Here, we propose and demonstrate a method for determining this parameter based on a direct measurement of variations in the laser gain and emission spectrum when subject to delayed optical feedback. We then use our approach to determine the pump current dependent linewidth enhancement factor of a high-β quantum dot micropillar laser. The validity of our approach is confirmed comparing it to two conventional methods, one based on the comparison of the linewidths above and below threshold and the other based on injection locking properties. Furthermore, the pump power dependence of α is quantitatively described by simulations based on a quantum-optical model.

AB - The linewidth enhancement factor α is a key parameter determining the spectral and dynamical behavior of semiconductor lasers. Here, we propose and demonstrate a method for determining this parameter based on a direct measurement of variations in the laser gain and emission spectrum when subject to delayed optical feedback. We then use our approach to determine the pump current dependent linewidth enhancement factor of a high-β quantum dot micropillar laser. The validity of our approach is confirmed comparing it to two conventional methods, one based on the comparison of the linewidths above and below threshold and the other based on injection locking properties. Furthermore, the pump power dependence of α is quantitatively described by simulations based on a quantum-optical model.

U2 - 10.1364/OE.26.031363

DO - 10.1364/OE.26.031363

M3 - Article

SN - 1094-4087

VL - 26

SP - 31363

EP - 31371

JO - Optics Express

JF - Optics Express

IS - 24

ER -

Determining the linewidth enhancement factor via optical feedback in quantum dot micropillar lasers

Abstract

Access to Document

Fingerprint

Cite this