Photoinduced properties of Bis-azo chromophore host guest systems-birefringence and all optical tuneable polymer waveguide Bragg gratings

2017 ◽  
Vol 122 (2) ◽  
pp. 023107 ◽  
Author(s):  
Stefaan Janssens ◽  
Robert Breukers ◽  
Adam Swanson ◽  
Sebastiampillai Raymond
Keyword(s):  
Bragg Gratings ◽  
Polymer Waveguide ◽  
All Optical ◽  
Azo Chromophore

All-optical real-time monitoring of air/vacuum valves in water pipeline systems using fiber Bragg gratings

2021 ◽  
Vol 44 (1) ◽  
Author(s):  
Genivaldo A. de Aquino ◽  
Yvone de F. L. De Lucca ◽  
Thiago D. Cabral ◽  
Pedro M. Lazari ◽  
André L. S. S. Martim ◽  
...  
Keyword(s):  
Real Time ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Real Time Monitoring ◽  
All Optical ◽  
Pipeline Systems ◽  
Water Pipeline

scholarly journals Gasoline Quality Sensor Based on Tilted Fiber Bragg Gratings

Photonics ◽  
2019 ◽  
Vol 6 (2) ◽  
pp. 51 ◽  
Author(s):  
Stenio Aristilde ◽  
Cristiano M. B. Cordeiro ◽  
Jonas H. Osório
Keyword(s):  
Optical Fiber Sensor ◽  
Bragg Gratings ◽  
Bragg Grating ◽  
Fuel Quality ◽  
Resolution Limit ◽  
Practical Applications ◽  
Sensor Performance ◽  
All Optical ◽  
Index Changes ◽  
Spectral Responses

We report on the study of an intensity-based optical fiber sensor for gasoline quality monitoring. The sensor setup employs two Bragg gratings with different spectral responses to interrogate the optical response of a tilted Bragg grating. The sensor operation is based on the tilted Bragg grating sensitivity to external refractive index changes, which are translated as power variations by the interrogation scheme. Gasoline–ethanol solutions with concentrations ranging from 0% to 60% ethanol were used to demonstrate the sensor performance. The results allowed to estimate that the sensor is able, within its resolution limit, to detect ethanol concentration variations of 1.5% in gasoline–ethanol solutions and discriminate temperature variations of 0.5 °C. The all-optical sensor setup is compact and robust, making it a competitive alternative for the realization of fuel quality analyses in practical applications.

scholarly journals High Speed, Localized Multi-Point Strain Measurements on a Containment Vessel at 1.7 MHz Using Swept-Wavelength Laser-Interrogated Fiber Bragg Gratings

Sensors ◽  
2020 ◽  
Vol 20 (20) ◽  
pp. 5935
Author(s):  
Steve Gilbertson ◽  
Mark Pickrell ◽  
Dario Castano ◽  
Gary Salazar ◽  
Tom Beery ◽  
...  
Keyword(s):  
Strain Measurement ◽  
High Speed ◽  
High Explosive ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Laser Source ◽  
Global Changes ◽  
Element Analysis ◽  
All Optical ◽  
Explosive Detonation

Dynamic elastic strain in ~1.8 and 1.0 m diameter containment vessels containing a high explosive detonation was measured using an array of fiber Bragg gratings. The all-optical method, called real-time localized strain measurement, recorded the strain for 10 ms after detonation with additional measurements being sequentially made at a rate of 1.7 MHz. A swept wavelength laser source provided the repetition rate necessary for such high-speed measurements while also providing enough signal strength and bandwidth to simultaneously measure 8 or more unique points on the vessel’s surface. The data presented here arethen compared with additional diagnostics consisting of a fast spectral interferometer and an optical backscatter reflectometer to show a comparison between the local and global changes in the vessel strain, both dynamically and statically to further characterize the performance of the localized strain measurement. The results are also compared with electrical resistive strain gauges and finite element analysis simulations.

All-optical gain-controlled bidirectional add-drop amplifier using fiber Bragg gratings

2000 ◽  
Vol 12 (7) ◽  
pp. 894-896 ◽  
Author(s):  
C.H. Kim ◽  
H. Yoon ◽  
S.B. Lee ◽  
C.-H. Lee ◽  
Y.C. Chung
Keyword(s):  
Fiber Bragg Gratings ◽  
Optical Gain ◽  
Bragg Gratings ◽  
All Optical

Polarization-insensitive polymer waveguide Bragg gratings

2005 ◽  
Vol 48 (2) ◽  
pp. 334-338 ◽  
Author(s):  
S. Y. Cheng ◽  
K. S. Chiang ◽  
H. P. Chan
Keyword(s):  
Bragg Gratings ◽  
Polymer Waveguide ◽  
Polarization Insensitive

A widely tunable, dual-wavelength fiber laser incorporating two polymer waveguide Bragg gratings

2013 ◽  
Vol 10 (12) ◽  
pp. 125105 ◽  
Author(s):  
B K Choi ◽  
I-G Park ◽  
J H Byun ◽  
N Kim ◽  
S-P Han ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Bragg Gratings ◽  
Dual Wavelength ◽  
Polymer Waveguide
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