Aufsatz
Temperature stability of static and dynamic properties of 1.55 μm quantum dot lasers
Abstract
Static and dynamic properties of InP-based 1.55 µm quantum dot (QD) lasers were investigated. Due to the reduced size inhomogeneity and a high dot density of the newest generation of 1.55 µm QD gain materials, ridge waveguide lasers (RWG) exhibit improved temperature stability and record-high modulation characteristics. Detailed results are shown for the temperature dependence of static properties including threshold current, voltage-current characteristics, external differential efficiency and emission wavelength. Similarly, small and large signal modulations were found to have only minor dependences on temperature. Moreover, we show the impact of the active region design and the cavity length on the temperature stability. Measurements were performed in pulsed and continuous wave operation. High characteristic temperatures for the threshold current were obtained with T0 values of 144 K (15 - 60 °C), 101 K (60 - 110 °C) and 70 K up to 180 °C for a 900-µm-long RWG laser comprising 8 QD layers. The slope efficiency in these lasers is nearly independent of temperature showing a T_1 value of more than 900 K up to 110 °C. Due to the high modal gain, lasers with a cavity length of 340 µm reached new record modulation bandwidths of 17.5 GHz at 20 °C and 9 GHz at 80 °C, respectively. These lasers were modulated at 26 GBit/s in the non-return to zero format at 80 °C and at 25 GBaud using a four-level pulse amplitude format at 21 °C.
Sponsorship
Gefördert durch den Publikationsfonds der Universität KasselCitation
@article{doi:10.17170/kobra-20190206179,
author={Abdollahinia, A. and Banyoudeh, S. and Rippien, A. and Schnabel, F. and Eyal, O. and Cestier, I. and Kalifa, I. and Mentovich, E. and Eisenstein, G. and Reithmaier, J.P.},
title={Temperature stability of static and dynamic properties of 1.55 μm quantum dot lasers},
journal={Optics Express},
year={2018}
}
0500 Oax 0501 Text $btxt$2rdacontent 0502 Computermedien $bc$2rdacarrier 1100 2018$n2018 1500 1/eng 2050 ##0##http://hdl.handle.net/123456789/11071 3000 Abdollahinia, A. 3010 Banyoudeh, S. 3010 Rippien, A. 3010 Schnabel, F. 3010 Eyal, O. 3010 Cestier, I. 3010 Kalifa, I. 3010 Mentovich, E. 3010 Eisenstein, G. 3010 Reithmaier, J.P. 4000 Temperature stability of static and dynamic properties of 1.55 μm quantum dot lasers / Abdollahinia, A. 4030 4060 Online-Ressource 4085 ##0##=u http://nbn-resolving.de/http://hdl.handle.net/123456789/11071=x R 4204 \$dAufsatz 4170 7136 ##0##http://hdl.handle.net/123456789/11071
<resource xsi:schemaLocation="http://datacite.org/schema/kernel-2.2 http://schema.datacite.org/meta/kernel-2.2/metadata.xsd"> 2019-02-06T10:23:00Z 2019-02-06T10:23:00Z 2018-03-05 doi:10.17170/kobra-20190206179 http://hdl.handle.net/123456789/11071 Gefördert durch den Publikationsfonds der Universität Kassel eng Urheberrechtlich geschützt https://rightsstatements.org/page/InC/1.0/ 620 Temperature stability of static and dynamic properties of 1.55 μm quantum dot lasers Aufsatz Static and dynamic properties of InP-based 1.55 µm quantum dot (QD) lasers were investigated. Due to the reduced size inhomogeneity and a high dot density of the newest generation of 1.55 µm QD gain materials, ridge waveguide lasers (RWG) exhibit improved temperature stability and record-high modulation characteristics. Detailed results are shown for the temperature dependence of static properties including threshold current, voltage-current characteristics, external differential efficiency and emission wavelength. Similarly, small and large signal modulations were found to have only minor dependences on temperature. Moreover, we show the impact of the active region design and the cavity length on the temperature stability. Measurements were performed in pulsed and continuous wave operation. High characteristic temperatures for the threshold current were obtained with T0 values of 144 K (15 - 60 °C), 101 K (60 - 110 °C) and 70 K up to 180 °C for a 900-µm-long RWG laser comprising 8 QD layers. The slope efficiency in these lasers is nearly independent of temperature showing a T_1 value of more than 900 K up to 110 °C. Due to the high modal gain, lasers with a cavity length of 340 µm reached new record modulation bandwidths of 17.5 GHz at 20 °C and 9 GHz at 80 °C, respectively. These lasers were modulated at 26 GBit/s in the non-return to zero format at 80 °C and at 25 GBaud using a four-level pulse amplitude format at 21 °C. restricted access Abdollahinia, A. Banyoudeh, S. Rippien, A. Schnabel, F. Eyal, O. Cestier, I. Kalifa, I. Mentovich, E. Eisenstein, G. Reithmaier, J.P. doi:10.1364/OE.26.006056 publishedVersion ISSN 1094-4087 5 Optics Express 6056-6066 2018, 26 </resource>
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