Results 21 to 30 of about 46,635 (50)

Efficient Generation of Transversely and Longitudinally Truncated Chirped Gaussian Laser Pulses for Application in High-Brightness Photoinjectors

Photonics
The optimization of photoinjector brightness is crucial for achieving the highest performance at X-ray free-electron lasers. To this end, photocathode laser pulse shaping has been identified as a key technology for enhancing photon flux and lasing ...
Andreas Hoffmann, Sumaira Zeeshan, James Good, Matthias Gross, Mikhail Krasilnikov, Frank Stephan   +5 more
doaj   +1 more source

Ultrafast Laser Beam Profile Characterization in the Front-End of the ELI-NP Laser System Using Image Features and Machine Learning

Photonics
Ultrafast laser systems, implemented at the ELI-NP, require exceptional beam quality and spatial stability due to their femtosecond pulse durations and extremely high peak powers.
Tayyab Imran
doaj   +1 more source

High-Power Lasers and Light–Matter Interactions

Photonics
High-power laser systems and the study of light–matter interactions at high intensities are crucial for numerous scientific and technological fields, ranging from industrial materials processing [...]
Zhaohong Liu, Sensen Li, Jiawei Sun
doaj   +1 more source

Dynamic Observation of Ultrashort Pulses with Chaotic Features in a Tm-Doped Fiber Laser with a Single Mode Fiber–Grade Index Multimode Fiber–Single Mode Fiber Structure

Photonics
In this study, we have demonstrated an ultrafast Tm-doped fiber laser utilizing the nonlinear multimode interference (NL-MMI) effect, with a single mode fiber–grade index multimode fiber–single mode fiber (SMF-GIMF-SMF) structure serving as the saturable
Zhenhong Wang, Zexin Zhou, Yubo Ji, Qiong Zeng, Yufeng Song, Geguo Du, Hongye Li   +6 more
doaj   +1 more source

Electrically Stimulated and Frequency-Tunable Photonic Tonic Spiking Neuron Based on a DFB-LD Under Optical Feedback

Photonics
Based on a distributed feedback laser diode (DFB-LD) under optical feedback, a novel scheme for generating neuron-like tonic spiking is proposed, and the characteristics of the generated neuron-like tonic spiking are numerically investigated.
Zhiqiang Lei, Chaotao He, Qiupin Wang, Pu Ou, Zhengmao Wu, Guangqiong Xia   +5 more
doaj   +1 more source

A Dengue Virus Detection Using Biosensor-Based Two-Dimensional Photonic Crystal Ring Resonator

Photonics
This study proposes a novel two-dimensional photonic crystal ring resonator for detecting dengue-induced changes in blood components such as platelets, haemoglobin, and plasma.
Nadhir Djeffal, Sarra Bendib, Abdallah Hedir   +2 more
doaj   +1 more source

Tabletop 3D Display with Large Radial Viewing Angle Based on Panoramic Annular Lens Array

Photonics
Tabletop 3D display is an emerging display form that enables multiple users to share viewing around a central tabletop, making it promising for the application of collaborative work.
Min-Yang He, Cheng-Bo Zhao, Xue-Rui Wen, Yi-Jian Liu, Qiong-Hua Wang, Yan Xing   +5 more
doaj   +1 more source

Reexamination of Gain Theory for Intrinsic Photoconductive Devices

Photonics
The quantum efficiency (QE) or gain (G) of a photoconductive device is most commonly given in the literature as a ratio of carrier lifetime to transit time, allowing for a value much greater than unity. In this work, by assuming primary photoconductivity,
Nenad Vrucinic, Yong Zhang
doaj   +1 more source

Supercontinuum Generation in Suspended Core Fibers Based on Intelligent Algorithms

Photonics
This study presents a reverse-optimization framework for supercontinuum (SC) generation in Ge20Sb15Se65 suspended-core fibers (SCFs), integrating neural network modeling with the Nutcracker Optimization Algorithm to co-design optimal fiber structures and
Meiqian Jing, Tigang Ning
doaj   +1 more source

Secret Key Agreement for SISO Visible Light Communication Systems

Photonics
This paper studies the use of secret key agreement for single-input single-output (SISO) visible light communication (VLC) systems. Specifically, we put forward a scheme for secret key generation and analyze the secret key rate in SISO VLC systems. First,
Dongqin Guo, Jian Zhang, Gang Xin, Keming Tian, Xingyu Xiao   +4 more
doaj   +1 more source