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Abstract

This paper presents the results of a thermal computational analysis of a two-dimensional laser array emitting from a surface. The array consisted of eight equispaced ridge-waveguide edge-emitting nitride diode lasers. Surface emission of light was obtained using mirrors inclined at 45°. The authors investigate how the geometrical dimensions of the array emitters and their pitch in the array affect the increase and distribution of temperature in the device. They also examine the influence on the temperature increase and distribution of the thickness of the insulating SiO2, the thickness of the gold layer forming the top contact of the laser, and the thickness of the GaN substrate, as well as the influence of the ridge-waveguide width.
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Bibliography

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  15. Sarzała, R. P., Śpiewak, P., Nakwaski, W. & Wasiak, M. Cavity designs for nitride VCSELs with dielectric DBRs operating efficiently at different temperatures. Laser Technol. 132, 106482 (2020). https://doi.org/10.1016/j.optlastec.2020.106482
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    https://doi.org/10.2478/s11772-007-0035-3
  17. Tomczyk, A., Sarzała, R. P., Czyszanowski, T., Wasiak, M. & Nakwaski, W. Fully self-consistent three-dimensional model of edge-emitting nitride diode lasers. Opto-Electron. Rev. 11, 65–75 (2003). https://www.infona.pl/resource/bwmeta1.element.baztech-article-BWA1-0002-0110
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Authors and Affiliations

Dominika Dąbrówka
1
ORCID: ORCID
Robert P. Sarzała
1
ORCID: ORCID
Michał Wasiak
1
ORCID: ORCID
Anna Kafar
2
ORCID: ORCID
Piotr Perlin
2
ORCID: ORCID
Kiran Saba
2
ORCID: ORCID

  1. Institute of Physics, Lodz University of Technology, 217/221 Wólczańska St., 93-005 Łódź, Poland
  2. Institute of High Pressure Physics, Polish Academy of Sciences, 29/37 Sokołowska St., 01-142 Warsaw, Poland
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Abstract

The paper presents the first vertical-cavity surface-emitting lasers (VCSELs) designed, grown, processed and evaluated entirely in Poland. The lasers emit at »850 nm, which is the most commonly used wavelength for short-reach (<2 km) optical data communication across multiple-mode optical fiber. Our devices present state-of-the-art electrical and optical parameters, e.g. high room-temperature maximum optical powers of over 5 mW, laser emission at heat-sink temperatures up to at least 95°C, low threshold current densities (<10 kA/cm2) and wall-plug efficiencies exceeding 30% VCSELs can also be easily adjusted to reach emission wavelengths of around 780 to 1090 nm.
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Bibliography

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Authors and Affiliations

Marcin Gębski
1
ORCID: ORCID
Patrycja Śpiewak
1
ORCID: ORCID
Walery Kołkowski
2
Iwona Pasternak
2
Weronika Głowadzka
1
Włodzimierz Nakwaski
1
Robert P. Sarzała
1
ORCID: ORCID
Michał Wasiak
1
ORCID: ORCID
Tomasz Czyszanowski
1
Włodzimierz Strupiński
2

  1. Photonics Group, Institute of Physics, Lodz University of Technology, ul. Wólczańska 219, 90-924 Łódź
  2. Vigo System S.A., ul. Poznańska 129/133, 05-850 Ożarów Mazowiecki

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