Spectral Output of Homogeneously Broadened Semiconductor Lasers
Gain, spontaneous emission, and reflectance play important roles in setting the spectral output of homogeneously broadened lasers, such as semiconductor diode lasers. This paper provides a restricted-in-scope review of the steady-state spectral properties of semiconductor diode lasers. Analytic but...
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doaj-118487e969554c088c14e2313a03e3aa2021-08-26T14:13:43ZengMDPI AGPhotonics2304-67322021-08-01834034010.3390/photonics8080340Spectral Output of Homogeneously Broadened Semiconductor LasersDaniel T. Cassidy0Department of Engineering Physics, McMaster University, Hamilton, ON L8S 4L7, CanadaGain, spontaneous emission, and reflectance play important roles in setting the spectral output of homogeneously broadened lasers, such as semiconductor diode lasers. This paper provides a restricted-in-scope review of the steady-state spectral properties of semiconductor diode lasers. Analytic but transcendental solutions for a simplified set of equations for propagation of modes through a homogeneously broadened gain section are used to create a Fabry–Pérot model of a diode laser. This homogeneously broadened Fabry–Pérot model is used to explain the spectral output of diode lasers without the need for guiding-enhanced capture of spontaneous emission, population beating, or non-linear interactions. It is shown that the amount of spontaneous emission and resonant enhancement of the reflectance-gain (RG) product as embodied in the presented model explains the observed spectral output. The resonant enhancement is caused by intentional and unintentional internal scattering and external feedback.https://www.mdpi.com/2304-6732/8/8/340homogeneous broadeninggainspectral outputdiode lasersFabry–Pérot modelsteady state |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Daniel T. Cassidy |
spellingShingle |
Daniel T. Cassidy Spectral Output of Homogeneously Broadened Semiconductor Lasers Photonics homogeneous broadening gain spectral output diode lasers Fabry–Pérot model steady state |
author_facet |
Daniel T. Cassidy |
author_sort |
Daniel T. Cassidy |
title |
Spectral Output of Homogeneously Broadened Semiconductor Lasers |
title_short |
Spectral Output of Homogeneously Broadened Semiconductor Lasers |
title_full |
Spectral Output of Homogeneously Broadened Semiconductor Lasers |
title_fullStr |
Spectral Output of Homogeneously Broadened Semiconductor Lasers |
title_full_unstemmed |
Spectral Output of Homogeneously Broadened Semiconductor Lasers |
title_sort |
spectral output of homogeneously broadened semiconductor lasers |
publisher |
MDPI AG |
series |
Photonics |
issn |
2304-6732 |
publishDate |
2021-08-01 |
description |
Gain, spontaneous emission, and reflectance play important roles in setting the spectral output of homogeneously broadened lasers, such as semiconductor diode lasers. This paper provides a restricted-in-scope review of the steady-state spectral properties of semiconductor diode lasers. Analytic but transcendental solutions for a simplified set of equations for propagation of modes through a homogeneously broadened gain section are used to create a Fabry–Pérot model of a diode laser. This homogeneously broadened Fabry–Pérot model is used to explain the spectral output of diode lasers without the need for guiding-enhanced capture of spontaneous emission, population beating, or non-linear interactions. It is shown that the amount of spontaneous emission and resonant enhancement of the reflectance-gain (RG) product as embodied in the presented model explains the observed spectral output. The resonant enhancement is caused by intentional and unintentional internal scattering and external feedback. |
topic |
homogeneous broadening gain spectral output diode lasers Fabry–Pérot model steady state |
url |
https://www.mdpi.com/2304-6732/8/8/340 |
work_keys_str_mv |
AT danieltcassidy spectraloutputofhomogeneouslybroadenedsemiconductorlasers |
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1721190579956613120 |