Results 81 to 90 of about 2,955 (186)

Ultrasonic Lamb Wave Detection Based on a Tunable, Narrow-Linewidth, and Frequency-Locked Fiber Laser

open access: yesIEEE Photonics Journal, 2017
Developments of advanced ultrasonic sensors have made significant impact in structural health monitoring as well as in other various fields including electronics, biomedicine, and geophysics. We describe a cost-effective, highly stabilized, and sensitive
Jingjing Guo, Changxi Yang
doaj   +1 more source

Experimental Demonstration of a Multicorrugation-Pitch-Modulated (MCPM) DFB Semiconductor Laser Based on Reconstruction-Equivalent-Chirp Technology

open access: yesIEEE Photonics Journal, 2015
A multicorrugation-pitch-modulated (MCPM) distributed-feedback semiconductor laser is experimentally demonstrated for the first time to achieve stable single longitudinal mode (SLM) performance.
Jilin Zheng   +7 more
doaj   +1 more source

Contributions of the Alzheimer's Disease Neuroimaging Initiative to advancing AD research: a targeted review of recent publications

open access: yesAlzheimer's &Dementia, Volume 22, Issue 6, June 2026.
Abstract The Alzheimer's Disease Neuroimaging Initiative (ADNI) recently celebrated its 20th anniversary, reflecting two decades of major contributions to Alzheimer's research through open data sharing and longitudinal multimodal assessments. This review synthesizes 122 high‐impact studies using ADNI data or biospecimens from 2023 to mid‐2025 to ...
Dallas P. Veitch   +22 more
wiley   +1 more source

Tunable Narrow Linewidth Erbium-Doped Fiber Ring Laser Based on Saturable Absorber and Self-Injection Feedback

open access: yesIEEE Photonics Journal
We demonstrate a tunable single-longitudinal-mode (SLM) narrow linewidth erbium-doped fiber (EDF) ring laser (EDFRL) in a cost-effective way. The laser incorporates an unpumped-EDF-based saturable absorber (SA) and a self-injection feedback loop for mode
Fujun Xu   +3 more
doaj   +1 more source

Temporal Modeling of Amyloid and Tau Trajectories in Alzheimer's Disease Using PET and Plasma Biomarkers

open access: yesAnnals of Neurology, Volume 99, Issue 6, Page 1438-1451, June 2026.
Objective This study aimed to compare positron emission tomography (PET) and plasma‐based temporal modeling of amyloid and tau biomarkers in Alzheimer's disease. Methods Longitudinal amyloid PET (n = 1,097, mean age ± SD = 72.5 ± 7.38 year, 51.4% male), 18F‐flortaucipir tau‐PET (n = 230, 74.3 ± 7.18 year, 52.2% female), and Fujirebio Lumipulse plasma p‐
Christopher A. Brown   +14 more
wiley   +1 more source

Single-longitudinal-mode operation in tunable novel zirconia-yttria-alumina-erbium-doped fiber laser

open access: yes, 2014
A tunable, single-longitudinal-mode (SLM) fiber laser based on a short length, highly doped zirconia–erbium doped fiber (Zr-EDF) is proposed and demonstrated.
Harun, S W   +7 more
core   +1 more source

Experimental Demonstration of the Distributed Feedback Semiconductor Laser With S-Bent Waveguide and Sampled Grating

open access: yesIEEE Photonics Journal, 2017
A distributed feedback (DFB) semiconductor laser based on s-bent waveguide and sampled grating is theoretically studied and experimentally demonstrated.
Yunshan Zhang   +10 more
doaj   +1 more source

Building a Robust Investigator‐Initiated Platform: The I‐CARE Experience

open access: yesClinical Pharmacology &Therapeutics, Volume 119, Issue 6, Page 1537-1546, June 2026.
Investigator‐initiated studies that include information collected by patients are rising, but limited data is available on patient and investigator experience in this setting. The I‐CARE cohort included patients with inflammatory bowel disease (IBD) monthly collecting clinical information in 15 countries for up to 6 years.
Julien Kirchgesner   +906 more
wiley   +1 more source

Bifunctional operation semiconductor laser with mode-locking and single-longitudinal modes

open access: yes
We present the first demonstration of a bifunctional-operation semiconductor laser (BOSL) operating at a wavelength of 1550 nm. By evanescently coupling a topological interface state extended grating waveguide with a straight waveguide, the BOSL achieves
Marsh, John H.   +6 more
core   +1 more source

Study on a DFB Laser Diode Based on Sampled Grating Technique for Suppression of the Zeroth Order Resonance

open access: yesIEEE Photonics Journal, 2017
A distributed feedback (DFB) semiconductor laser based on sampled grating with multiple sections, i.e., a straight, a bent, and a tilted waveguide, is proposed to suppress the $0{\rm{th}}$ -order resonance.
Lianyan Li   +5 more
doaj   +1 more source

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