Investigation of optimization of fiber Bragg grating writing based on single-pulse excimer laser

2016 ◽  
Author(s):  
Cheng Cheng ◽  
Huiyong Guo ◽  
Yu Zheng ◽  
Haihu Yu
Keyword(s):  
Fiber Bragg Grating ◽  
Excimer Laser ◽  
Single Pulse ◽  
Bragg Grating ◽  
Pulse Excimer Laser

Single-pulse excimer laser nanostructuring of silicon: A heat transfer problem and surface morphology

2008 ◽  
Vol 103 (9) ◽  
pp. 094311 ◽  
Author(s):  
Julia Eizenkop ◽  
Ivan Avrutsky ◽  
Daniel G. Georgiev ◽  
Vipin Chaudchary
Keyword(s):  
Heat Transfer ◽  
Surface Morphology ◽  
Excimer Laser ◽  
Transfer Problem ◽  
Single Pulse ◽  
Heat Transfer Problem ◽  
Pulse Excimer Laser

Evolution of Optical Fiber Temperature during Fiber Bragg Grating Fabrication Using KrF Excimer Laser

2004 ◽  
Vol 43 (1) ◽  
pp. 147-151 ◽  
Author(s):  
Mitsuo Nakamura ◽  
Chisa Komatsu ◽  
Yuji Masuda ◽  
Keio Fujita ◽  
Makoto Yamauchi ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Fiber Bragg Grating ◽  
Excimer Laser ◽  
Bragg Grating ◽  
Grating Fabrication ◽  
Krf Excimer Laser

scholarly journals Dual Wavelength Differential Detection of Fiber Bragg Grating Sensors with a Pulsed DFB Laser

Sensors ◽  
2020 ◽  
Vol 20 (17) ◽  
pp. 4766
Author(s):  
François Ouellette ◽  
Zhonghua Ou ◽  
Jianfeng Li
Keyword(s):  
Fiber Bragg Grating ◽  
Single Pulse ◽  
Dual Wavelength ◽  
Bragg Grating ◽  
Differential Detection ◽  
Fiber Bragg Grating Sensors ◽  
Nanosecond Pulses ◽  
Dfb Laser ◽  
Reflected Power ◽  
Prototype Instrument

We show how dual wavelength differential detection can be used to measure fiber Bragg grating sensors using nanosecond pulses from a single DFB laser diode, by taking advantage of its dynamic chirp. This can be performed in two ways: by measuring the reflected power from two separate pulses driven by two different currents, or by taking two delayed digitized samples within a single pulse. A prototype instrument using fast digitizing and processing with an FPGA is used to characterize the chirp, from which the performance can be optimized for both measurement schemes.

Single-pulse coherent anti-Stokes Raman spectroscopy via fiber Bragg grating

2016 ◽  
Author(s):  
Seung Ryeol Oh ◽  
Joo Hyun Park ◽  
Won Sik Kwon ◽  
Jin Hwan Kim ◽  
Kyung-Soo Kim ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Fiber Bragg Grating ◽  
Single Pulse ◽  
Bragg Grating ◽  
Anti Stokes

Characteristics of single-pulse excimer laser beam profile on the low-temperature poly-Si TFTs

2000 ◽  
Author(s):  
ChuJung Shih ◽  
LiMing Wang ◽  
ShihChang Chang ◽  
I-Min Lu ◽  
I-Wei Wu
Keyword(s):  
Low Temperature ◽  
Laser Beam ◽  
Excimer Laser ◽  
Single Pulse ◽  
Beam Profile ◽  
Laser Beam Profile ◽  
Pulse Excimer Laser

Investigation of fiber Bragg grating as a spectral notch shaper for single-pulse coherent anti-Stokes Raman spectroscopy

2017 ◽  
Vol 383 ◽  
pp. 107-112 ◽  
Author(s):  
Seung Ryeol Oh ◽  
Joo Hyun Park ◽  
Kyung-Soo Kim ◽  
Eun Seong Lee ◽  
Jae Yong Lee ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Fiber Bragg Grating ◽  
Single Pulse ◽  
Bragg Grating ◽  
Anti Stokes

Single pulse excimer laser nanostructuring of thin silicon films: Nanosharp cones formation and a heat transfer problem

2007 ◽  
Vol 101 (9) ◽  
pp. 094301 ◽  
Author(s):  
Julia Eizenkop ◽  
Ivan Avrutsky ◽  
Gregory Auner ◽  
Daniel G. Georgiev ◽  
Vipin Chaudhary
Keyword(s):  
Heat Transfer ◽  
Excimer Laser ◽  
Transfer Problem ◽  
Single Pulse ◽  
Silicon Films ◽  
Heat Transfer Problem ◽  
Pulse Excimer Laser ◽  
Thin Silicon

scholarly journals Experimental Strain Measurement Approach Using Fiber Bragg Grating Sensors for Monitoring of Railway Switches and Crossings

Sensors ◽  
2021 ◽  
Vol 21 (11) ◽  
pp. 3639
Author(s):  
Abdelfateh Kerrouche ◽  
Taoufik Najeh ◽  
Pablo Jaen-Sola
Keyword(s):  
Fiber Bragg Grating ◽  
Experimental Tests ◽  
Cost Effective ◽  
Measuring Method ◽  
Bragg Grating ◽  
Railway Network ◽  
System Failures ◽  
Railway Infrastructure ◽  
Train Speed ◽  
And Control

Railway infrastructure plays a major role in providing the most cost-effective way to transport freight and passengers. The increase in train speed, traffic growth, heavier axles, and harsh environments make railway assets susceptible to degradation and failure. Railway switches and crossings (S&C) are a key element in any railway network, providing flexible traffic for trains to switch between tracks (through or turnout direction). S&C systems have complex structures, with many components, such as crossing parts, frogs, switchblades, and point machines. Many technologies (e.g., electrical, mechanical, and electronic devices) are used to operate and control S&C. These S&C systems are subject to failures and malfunctions that can cause delays, traffic disruptions, and even deadly accidents. Suitable field-based monitoring techniques to deal with fault detection in railway S&C systems are sought after. Wear is the major cause of S&C system failures. A novel measuring method to monitor excessive wear on the frog, as part of S&C, based on fiber Bragg grating (FBG) optical fiber sensors, is discussed in this paper. The developed solution is based on FBG sensors measuring the strain profile of the frog of S&C to determine wear size. A numerical model of a 3D prototype was developed through the finite element method, to define loading testing conditions, as well as for comparison with experimental tests. The sensors were examined under periodic and controlled loading tests. Results of this pilot study, based on simulation and laboratory tests, have shown a correlation for the static load. It was shown that the results of the experimental and the numerical studies were in good agreement.

A Fiber Bragg Grating acceleration sensor with temperature compensation

Optik ◽  
2021 ◽  
pp. 166993
Author(s):  
Xianfeng Zhao ◽  
Zhen’an Jia ◽  
Wei Fan ◽  
Wangfei Liu ◽  
Hong Gao ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Temperature Compensation ◽  
Bragg Grating ◽  
Acceleration Sensor
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