Results 41 to 50 of about 345 (137)
Sensors, 2018 We demonstrated a kind of long-period fiber grating (LPFG), which is manufactured with a thermal diffusion treatment. The LPFG was inscribed on an ultrahigh-numerical-aperture (UHNA) fiber, highly doped with Ge and P, which was able to easily diffuse at ...
Xiang Shen +6 more
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Optical vortex fiber laser based on modulation of transverse modes in two mode fiber
APL Photonics, 2019 Optical vortices, characterized by helical phase fronts, are usually generated outside the laser cavity using passive modulation methods. Here, we demonstrate an all-fiber laser to directly deliver mode-locked and continuous-wave vortex beams based on ...
Dong Mao +7 more
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An Ultrasensitive Long-Period Fiber Grating-Based Refractive Index Sensor with Long Wavelengths
Sensors, 2016 The response of a novel long-period fiber grating (LPFG) with a period of 180 µm to a surrounding refractive index (RI) was investigated. The results displayed that, with the increase in RI of the surrounding media of cladding glass in the grating region,
Qiu-Shun Li +8 more
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IEEE Access, 2020 Refractive index (RI) sensing is a promising technique in a variety of different scientific and industrial applications. In this paper, we theoretically and experimentally propose a newly-designed RI sensor.
Jie Dong +7 more
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Dynamic Responses Measured by Optical Fiber Sensor for Structural Health Monitoring
Applied Sciences, 2019 An optical fiber sensing system integrating a fiber Bragg grating (FBG) sensor, a long-period fiber grating (LPFG) optical filter and a photodetector is presented to monitor the dynamic response of a structure subjected to base excitation and impact ...
Shiuh-Chuan Her, Shin-Chieh Chung
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Nanophotonics, Volume 15, Issue 7, 13 April 2026.We experimentally achieve an ultraflat, 4.35‐W all‐fiber supercontinuum spanning from 414 to 1860 nm (3‐dB bandwidth). To our knowledge, this represents the broadest octave‐spanning, visible‐to‐NIR, ultraflat SC source ever reported, which also exhibits maximal visible band coverage. ABSTRACT We propose a method for generating ultraflat supercontinuum (
Yashuai Guo +6 more
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Biosensors, 2021 Understanding environmental information is necessary for functions correlated with human activities to improve healthcare quality and reduce ecological risk.
Bakr Ahmed Taha +7 more
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Advanced Optical Materials, Volume 13, Issue 27, September 23, 2025.The focus on volatile organic compounds (VOCs) detection is dictated by the increasing awareness of their impact on human health. In addition, VOCs are increasingly considered novel for early diagnosis of diseases. Among various types of VOC sensor devices, optical detectors play an essential role, offering excellent versatility, fast response time ...
Aleksandra Hernik +6 more
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Double Notched Long-Period Fiber Grating Characterization for CO2 Gas Sensing Applications †
Sensors, 2018 In this study, we applied a double-sided inductively coupled plasma (ICP) process to nanostructure long-period fiber grating (LPFG) in order to fabricate a double-notched LPFG (DNLPFG) sensor with a double-sided surface corrugated periodic grating. Using
Hsiang-Chang Hsu +4 more
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International Journal of Optics, Volume 2025, Issue 1, 2025.This paper presents a phase noise suppression and frequency stabilization technology for a single‐fiber‐loop optoelectronic oscillator (OEO). By incorporating low‐noise and high‐stability laser source control, bias point stabilization for the electro‐optic modulator, and a phase‐locked loop‐based frequency stabilization module, the proposed system ...
Yingbo Liu +6 more
wiley +1 more source