Results 61 to 70 of about 118 (95)

A Highly Integrated BOTDA/XFG Sensor on a Single Fiber for Simultaneous Multi-Parameter Monitoring of Slopes

open access: yesSensors, 2019
A highly integrated sensing technology, combining a stimulated Brillouin scattering-based distributed sensor with XFG (fiber Bragg grating (FBG) and long-period fiber grating (LPFG)) sensors on a single fiber, is proposed for the simultaneous measurement
Feng Li   +4 more
doaj   +1 more source

High Strain Sensitivity Temperature Sensor Based on a Secondary Modulated Tapered Long Period Fiber Grating

open access: yesIEEE Photonics Journal, 2019
A novel sensor structure has been proposed and experimentally investigated for simultaneous strain and temperature measurement. The structure is fabricated by weak power modulation of CO2 laser exposure on tapered long period fiber grating (LPFG ...
Xiren Jin   +12 more
doaj   +1 more source

Controllable all-fiber generation/conversion of circularly polarized orbital angular momentum beams using long period fiber gratings

open access: yesNanophotonics, 2018
Mode-division multiplexing (MDM) is a promising technology for increasing the data-carrying capacity of a single few-mode optical fiber. The flexible mode manipulation would be highly desired in a robust MDM network.
Han Ya   +6 more
doaj   +1 more source

High Temperature Optical Fiber Sensor Based on Compact Fattened Long-Period Fiber Gratings

open access: yesSensors, 2013
A compact high temperature fiber sensor where the sensor head consists of a short fattened long period fiber grating (F-LPFG) of at least 2 mm in length and background loss of −5 dBm is reported.
Eduardo Huerta-Mascotte   +8 more
doaj   +1 more source

Multi-Parameter Sensing Device to Detect Liquid Layers Using Long-Period Fiber Gratings

open access: yesSensors, 2018
Insoluble liquids show layers such as water and oil. The detection of the exact interface locations and the level changes for layered liquids are of paramount importance for chemistry purifications, liquid storage in reservoirs, oil transportation, and ...
Zhihui Pan, Ying Huang, Hai Xiao
doaj   +1 more source

Displacement sensor with a wide dynamic range based on a balloon-like long-period fiber grating

open access: yesZhongguo Jianchuan Yanjiu
ObjectiveAiming at the problem of the narrow dynamic range of current optical fiber displacement sensors, a balloon-like long-period fiber grating (LPFG) displacement sensor with a simple structure and easy preparation method is designed. MethodsBased on
Pu CHENG, Huiling QIN, Liang PU
doaj   +1 more source

Highly Sensitive Refractive Index Optical Fiber Sensors Fabricated by a Femtosecond Laser

open access: yesIEEE Photonics Journal, 2011
Highly sensitive and robust refractive index (RI) fiber sensors are proposed, which are based on concatenating two micro air-cavities. The micro air-cavities embedded in the fiber along the core axis are fabricated by combining the techniques of ...
Jinpeng Yang   +5 more
doaj   +1 more source

LPFG Biosensor for IL-6 Detection in Murine Serum Samples Associated with Ischemic Disease

open access: yesSensors
Nowadays, optical fiber-based biosensors are widely used in various fields, particularly in medical diagnostics and the selection of appropriate treatments for certain diseases. One example is cerebral ischemic disease, where many biomarkers are released
Brenda Vertti-Cervantes   +8 more
doaj   +1 more source

Development of LPFG-Based Seawater Concentration Monitoring Sensors Packaged by BFRP

open access: yesMicromachines
Leveraging the sensitivity of long-period fiber grating (LPFG) to changes in the environmental refractive index, an LPFG-based seawater concentration monitoring sensor is proposed. Considering the highly saltine and alkali characteristics of the sensor’s
Zhe Zhang   +3 more
doaj   +1 more source

A Simultaneous Measurement Sensor for Temperature and Curvature Based on Congruent Quasi-Helical Long-Period Fiber Grating

open access: yesSensors
This article presents a long-period fiber-grating sensor based on a congruent quasi-helical structure (CQH-LPFG) with the two-parameter measurement of both temperature and curvature.
Haoen Sun   +7 more
doaj   +1 more source

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