Realisation of a widely tuneable sampled grating DBR laser emitting around 970 nm

Brox, O.; Tawfieq, Mahmoud; Casa, Pietro Della; Ressel, P.; Sumpf, B.; Erbert, G.; Knigge, Andrea; Weyers, M.; Wenzel, H.

doi:10.1049/el.2017.0521

Cited by 10 publications

(2 citation statements)

References 5 publications

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“…Recently, ECDL has been implemented on a single GaAs chip as a monolithic ECDL (mECDL) . Such a device requires a two-step epitaxy technology − to form an active region and a low-loss passive region.…”

Section: Introductionmentioning

confidence: 99%

Data-Efficient Machine Learning Algorithms for the Design of Surface Bragg Gratings

Mahani,

Rahimof,

Wenzel

et al. 2023

ACS Appl. Opt. Mater.

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Deep learning models, with a prerequisite of large databases, are common approaches in applying machine learning for inverse design in photonics. For these models, less expensive, approximate methods are usually used to generate large databases, which limit their applications. In this study, we compare the performance of data-efficient machine learning (ML) models for predicting the characteristics of surface Bragg gratings in semiconductor ridge waveguides. We employ the 3D finite-difference time-domain method which is very accurate but time-consuming to generate a database. We analyze the performance of different ML models including support vector regression and extreme gradient boosting (XGBoost) on our limited data. We show that the XGBoost significantly outperforms other models on a smaller database. Our results pave the way for the data-efficient design of integrated photonic components with accurate but time-demanding simulations.

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Section: Introductionmentioning

confidence: 99%

Data-Efficient Machine Learning Algorithms for the Design of Surface Bragg Gratings

Mahani,

Rahimof,

Wenzel

et al. 2023

ACS Appl. Opt. Mater.

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“…In [11,12] we presented a technology for GaAs-based lasers, which allows the removal of the active layer in the grating section and the simultaneous embedding of a Bragg grating by several wet-chemical etch processes and a two-step epitaxy. This technology was used for the fabrication of sampled grating (SG) DBR lasers to obtain a wide (20 nm) tunability.…”

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confidence: 99%

Novel 1064 nm DBR lasers combining active layer removal and surface gratings

Brox

Wenzel

Fricke

et al. 2021

Electronics Letters

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The fabrication and characterisation details of novel distributed Bragg reflector (DBR) diode lasers emitting around 1064 nm are presented here. The AlGaAs epitaxial layer stack used here allows the removal of the active quantum wells in passive sections where no current is injected. The DBR lasers fabricated with a two‐step epitaxial approach without an active layer in the grating sections show improved performance in terms of power, efficiency, and linewidth in comparison to its all‐active DBR counterparts.

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Monolithically Integrated Active/Passive GaAs Laser Platform Including High-Q Ring Resonators

Koester,

Wenzel,

Fricke

et al. 2024

Springer Proceedings in Physics

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Realisation of a widely tuneable sampled grating DBR laser emitting around 970 nm

Cited by 10 publications

References 5 publications

Data-Efficient Machine Learning Algorithms for the Design of Surface Bragg Gratings

Data-Efficient Machine Learning Algorithms for the Design of Surface Bragg Gratings

Novel 1064 nm DBR lasers combining active layer removal and surface gratings

Monolithically Integrated Active/Passive GaAs Laser Platform Including High-Q Ring Resonators

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