Results 31 to 40 of about 807 (182)

Polarization dynamics in spin‐VCSELs with integrated surface grating for high birefringence splitting

open access: yesElectronics Letters, 2023
Polarization dynamics in spin‐polarized vertical‐cavity surface‐emitting lasers (spin‐VCSELs) with high birefringence have recently been demonstrated to offer very high potential for optical data‐transmission systems that outperform their counterparts ...
Markus Lindemann   +6 more
doaj   +1 more source

High‐Performance Thin‐Film VCSELs Integrated with a Copper‐Plated Heatsink

open access: yesAdvanced Materials Interfaces, 2023
High‐performance continuous‐wave (CW) vertical‐cavity surface‐emitting lasers (VCSELs) rely on efficient thermal management for which top‐emitting 930 nm thin‐film VCSELs are integrated with a copper‐plated heatsink by using a double‐transfer technique ...
Sunghyun Moon   +7 more
doaj   +1 more source

Bi-LSTM-Augmented Deep Neural Network for Multi-Gbps VCSEL-Based Visible Light Communication Link

open access: yesSensors, 2022
With the remarkable advances in vertical-cavity surface-emitting lasers (VCSELs) in recent decades, VCSELs have been considered promising light sources in the field of optical wireless communications.
Seoyeon Oh   +4 more
doaj   +1 more source

Spin Polarization Modulation Responses of Polarization Bistable VCSELs

open access: yesIEEE Photonics Journal
This study investigates the spin polarization modulation responses of vertical-cavity surface-emitting lasers (VCSELs) through numerical simulations and experimental measurements.
Nobuhide Yokota, Hiroshi Yasaka
doaj   +1 more source

Contact Geometrical Study for Top Emitting 980 nm InGaAs/GaAsP Vertical-Cavity Surface Emitting Lasers

open access: yesARO-The Scientific Journal of Koya University, 2021
Geometrical contacts of a double mesa structure with 16 rows ×15 columns arrays of top emitting GaAs based 980 nm vertical cavity surface emitting lasers (VCSELs) are fabricated and characterized.
Faten A. Chaqmaqchee
doaj   +1 more source

Surface Photonic Crystal Engineering of a Multi-Mode VCSEL for a Bit-Loaded Broadband QAM-OFDM Data Link at 99 Gbit/s

open access: yesPhotonics, 2023
Bit-loaded quadrature amplitude modulation-orthogonal frequency division multiplexing (QAM-OFDM) encoding and photonic-crystal-engineered multi-mode vertical-cavity surface-emitting lasers (MM-VCSELs) transmission performance are analyzed.
Yu-Hong Lin   +5 more
doaj   +1 more source

Photonic‐Enabled Energy‐Efficient Transparent Neuromorphic Computing Devices: A Review

open access: yesAdvanced Science, EarlyView.
Transparent photonic neuromorphic computing devices merge optics and brain‐inspired computing to overcome von Neumann bottlenecks with ultrafast, low‐energy processing. By exploiting transparent oxides, 2D materials, phase‐change materials, and hybrid heterostructures, these platforms enable photonic synapses, memory, and logic for see‐through edge ...
Shuvaraj Ghosh   +8 more
wiley   +1 more source

Flexible wearable electronics for cardiovascular monitoring from surface signals to deep physiological insights

open access: yesFlexMat, EarlyView.
This review organizes flexible wearable electronics for cardiovascular monitoring into four interconnected information layers: surface electrophysiology, hemodynamic sensing, vascular imaging, and biofluid biomarker analysis. This framework clarifies how electrical rhythm, vascular loading, structural and flow‐related features, and biochemical states ...
Qiao Chen   +5 more
wiley   +1 more source

Long-wavelength VCSELs with buried tunnel junction: design optimization

open access: yesJPhys Photonics
The review is focused on reporting about design optimizations of the long-wavelength (LW) vertical-cavity surface-emitting laser (VCSELs) with an aperture formed by regrown (buried) tunnel junctions, pioneered by Amann et al from the Technical University
Andrey V Babichev   +7 more
doaj   +1 more source

Performance Improvement of GaN-Based Vertical-Cavity Surface-Emitting Lasers by Using Tapered SiO2-Buried Structure

open access: yesIEEE Photonics Journal
In GaN-based vertical-cavity surface-emitting lasers (VCSELs) with insulator-buried structure, the strong index guiding will introduce higher order modes. In this paper, we present a novel GaN-based VCSEL with a tapered SiO2-buried structure by numerical
Rongbin Xu   +6 more
doaj   +1 more source

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