Results 21 to 30 of about 25,768 (267)
Photonics, 2022 In this paper, a simple sampling frequency offset (SFO) estimation and compensation scheme based on two phase-conjugated pilots is proposed and experimentally demonstrated in an OFDM-based underwater wireless optical communication (UWOC) system.
Hu Li +5 more
doaj +1 more source
Microsystems & NanoengineeringDigital micromirror device-based maskless projection lithography (DMPL) has emerged as a transformative nanopatterning platform, yet faces fundamental challenges in resolving high-density nanostructures due to optical diffraction constraints.
Zi-Xin Liang +5 more
doaj +1 more source
A Multi-Groove Ceramic-Packaged Sapphire-Diaphragm Fiber Sensor for High-Temperature Vibration
IEEE Photonics JournalA sapphire-diaphragm fiber-optic vibration sensor for high-temperature applications is proposed and experimentally demonstrated. Its sensing unit consists solely of a monolithic sapphire sensitive diaphragm encapsulated in a multi-groove ceramic housing,
Zhifeng Wang +7 more
doaj +1 more source
True Phase Measurement of Distributed Vibration Sensors Based on Heterodyne $\varphi $-OTDR
IEEE Photonics Journal, 2018 We demonstrate a method to truly measure the phase change originated from external vibration by heterodyne phase-sensitive optical time-domain reflectometer ($\varphi $ -OTDR).
Huanhuan Liu +6 more
doaj +1 more source
Seven-Ring-Core Erbium-Doped Fiber for OAM-MDM Amplification
IEEE Photonics Journal, 2023 Orbital angular momentum (OAM) mode division multiplexing (MDM) amplification in a seven-ring-core erbium-doped fiber (7-RC-EDF) has been experimentally demonstrated, in which the 1st–4th order OAM modes within each core of the 7-RC-EDF can be ...
Qi Jiang +8 more
doaj +1 more source
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objective To delineate specific in vivo white matter pathology in neuronal intranuclear inclusion disease (NIID) using diffusion spectrum imaging (DSI) and define its clinical relevance. Methods DSI was performed on 42 NIID patients and 38 matched controls.
Kaiyan Jiang +10 more
wiley +1 more source
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Background and Objectives Multiple sclerosis (MS) exhibits racially disparate rates of disease progression. Black people with MS (B‐PwMS) experience a more severe disease course than non‐Hispanic White people with MS (NHW‐PwMS). Here we investigated structural and functional connectivity as well as structure–function decoupling in the ...
Emilio Cipriano +11 more
wiley +1 more source
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objective Considerable efforts have been dedicated to developing effective treatments for post‐stroke executive impairment (PSEI), among which repetitive transcranial magnetic stimulation (rTMS) has shown great potential. This study aimed to investigate the therapeutic effects of high‐frequency rTMS on working memory (WM) and response ...
Mengting Lao +6 more
wiley +1 more source
IEEE Photonics Journal, 2017 We demonstrate a simple structure for the refractive index sensing by splicing a segment of capillary with two segments of single-mode fibers (SMFs). By selecting appropriate splicing parameters, two mode coupling regions can be formed with tapered air ...
Xiaobei Zhang +5 more
doaj +1 more source
Recent progress of in-fiber WGM microsphere resonator
Frontiers of Optoelectronics, 2023 In-fiber whispering gallery mode (WGM) microsphere resonators have received remarkable attention due to the superiorities of compact structure, high stability and self-alignment. As an in-fiber structure, WGM microsphere resonators have been demonstrated
Yong Yang +4 more
doaj +1 more source