Zobrazeno 1 - 10
of 2 795
pro vyhledávání: '"QUAN SHENG"'
Publikováno v:
Mathematical Biosciences and Engineering, Vol 21, Iss 3, Pp 3838-3859 (2024)
Brain functional networks derived from functional magnetic resonance imaging (fMRI) provide a promising approach to understanding cognitive processes and predicting cognitive abilities. The topological attribute parameters of global networks are take
Externí odkaz:
https://doaj.org/article/05e72011eb2640af8dc5f46a8788d5f6
Publikováno v:
Frontiers of Optoelectronics, Vol 16, Iss 1, Pp 1-11 (2023)
Abstract 976 nm + 1976 nm dual-wavelength pumped Er-doped ZBLAN fiber lasers are generally accepted as the preferred solution for achieving 3.5 μm lasing. However, the 2 μm band excited state absorption from the upper lasing level (4F9/2 → 4F7/2)
Externí odkaz:
https://doaj.org/article/71e5add11dd448809398d06fb6a30451
Publikováno v:
High Power Laser Science and Engineering, Vol 12 (2024)
We demonstrate a continuous-wave (CW) Nd:YVO4-potassium gadolinium tungstate (KGW) intracavity Raman laser with a diode-to-Stokes optical efficiency of 34.2%. By optimizing the cavity arrangement and reducing the cavity losses, 8.47 W Stokes output a
Externí odkaz:
https://doaj.org/article/82b706359b22485b92becf812812c0c4
Autor:
Lu Zhang, Shijie Fu, Quan Sheng, Xuewen Luo, Junxiang Zhang, Wei Shi, Qiang Fang, Jianquan Yao
Publikováno v:
Photonics, Vol 11, Iss 5, p 449 (2024)
We demonstrate a pulsed Er-doped ZBLAN fiber laser operating at 3.75 μm based on the gain-switching scheme. A diffraction grating is introduced as a wavelength selection component to enable stable lasing in this long-wavelength region that deviates
Externí odkaz:
https://doaj.org/article/8bbc5be31fdb4960a14eb5efcd5f0a3a
Publikováno v:
Results in Physics, Vol 55, Iss , Pp 107172- (2023)
We demonstrate an efficient, high-power single-end-pumped Er-doped ZBLAN (Er:ZBLAN) fiber laser operating at 2.8 μm. A maximum laser power of 33.8 W at a wavelength of 2.87 μm was achieved with an optical efficiency of 26.4 %. A maximum slope effic
Externí odkaz:
https://doaj.org/article/ab40aa2005794f6a8d32b5f9fa4043f1
Autor:
Quan Sheng, Aihua Wang, Yuanyuan Ma, Sijia Wang, Meng Wang, Zheng Shi, Junjie Liu, Shijie Fu, Wei Shi, Jianquan Yao, Takashige Omatsu
Publikováno v:
PhotoniX, Vol 3, Iss 1, Pp 1-12 (2022)
Abstract We investigate the generation of single-transverse-mode Laguerre-Gaussian (LG) emission from a diode-end-pumped Nd:YVO4, 1064 nm laser using mode selection via intracavity spherical aberration (SA). We present both theoretical and experiment
Externí odkaz:
https://doaj.org/article/58e9aeb6142b481bb07263ded5ce0b55
Publikováno v:
Results in Physics, Vol 46, Iss , Pp 106281- (2023)
A polarization-maintaining large-mode-area solid-core anti-resonant fiber is investigated in this work with double-layer anti-resonant elements for improved capability on fundamental mode guidance and higher order mode suppression, and structural and
Externí odkaz:
https://doaj.org/article/235506de6c36426490a9c41172772329
Open-vocabulary image segmentation has been advanced through the synergy between mask generators and vision-language models like Contrastive Language-Image Pre-training (CLIP). Previous approaches focus on generating masks while aligning mask feature
Externí odkaz:
http://arxiv.org/abs/2412.11464
Autor:
Chaodu Shi, Xun Deng, Shijie Fu, Quan Sheng, Peiheng Jiang, Zheng Shi, Yanyan Li, Wei Shi, Jianquan Yao
Publikováno v:
Frontiers in Physics, Vol 10 (2022)
In this work, a single-frequency fiber amplifier with output power of 703 W was demonstrated at 1,064.4 nm in an all-fiber configuration. Cascaded Yb3+-doped fiber structure with different dopant concentration and hybrid 915/976 nm pump scheme were e
Externí odkaz:
https://doaj.org/article/6a6882c004d64809b73c9feceb35761b
Autor:
Quan Sheng, Aihua Wang, Yue Qi, Meng Wang, Zheng Shi, Jingni Geng, Junjie Liu, Sijia Wang, Shijie Fu, Wei Shi, Jianquan Yao
Publikováno v:
Results in Physics, Vol 37, Iss , Pp 105558- (2022)
The field curvature (FC) induced defocusing is the main issue which limits the effective field of view (FoV) of cat-eye retroreflectors (CERs). We found that for a certain common spherical lens, there exists an optimal mirror radius of curvature (ROC
Externí odkaz:
https://doaj.org/article/27fbe91bba8341e1affd2f70ddb69d96