scholarly journals Development of a Shock and Detonation Velocity Measurement System Using Chirped Fiber Bragg Gratings

Sensors ◽  
2020 ◽  
Vol 20 (4) ◽  
pp. 1026
Author(s):  
Yohan Barbarin ◽  
Alexandre Lefrançois ◽  
Vincent Chuzeville ◽  
Sylvain Magne ◽  
Laurent Jacquet ◽  
...  

Dynamic measurements of shock and detonation velocities are performed using long chirped fiber Bragg gratings (CFBGs). Such thin probes, with a diameter of typically 125 µm or even 80 µm can be directly inserted into high-explosive (HE) samples or simply glued laterally. During the detonation, the width of the optical spectrum is continuously reduced by the propagation of the wave-front, which physically shortens the CFBG. The light power reflected back shows a ramp-down type signal, from which the wave-front position is obtained as a function of time, thus yielding a detonation velocity profile. A calibration procedure was developed, with the support of optical simulations, to cancel out the optical spectrum distortions from the different optical components and to determine the wavelength-position transfer function of the CFBG. The fitted slopes of the X–T diagram give steady detonation velocity values which are in very good agreement with the classical measurements obtained from discrete electrical shorting pins (ESP). The main parameters influencing the uncertainties on the steady detonation velocity value measured by CFBG are discussed. To conclude, different HE experimental configurations tested at CEA (Commissariat à l’Energie Atomique et aux Energies Alternatives) are presented: bare cylindrical sticks, wedges for shock-to-detonation transitions (SDT), spheres, a cast-cured stick around a CFBG, and a detonation wave-front profile configuration.

ETRI Journal ◽  
2004 ◽  
Vol 26 (4) ◽  
pp. 371-374 ◽  
Author(s):  
Seung-Hyun Cho ◽  
Jaedong Park ◽  
Byoungwhi Kim ◽  
Min-Ho Kang

2008 ◽  
Vol 26 (12) ◽  
pp. 1613-1625 ◽  
Author(s):  
Marco Pisco ◽  
Agostino Iadicicco ◽  
Stefania Campopiano ◽  
Antonello Cutolo ◽  
Andrea Cusano

2006 ◽  
Vol 2 (6) ◽  
pp. 430-432
Author(s):  
Lin Wang ◽  
Feng-ping Yan ◽  
Yi-fan Li ◽  
Tao-rong Gong ◽  
Shui-sheng Jian

Polymers ◽  
2022 ◽  
Vol 14 (2) ◽  
pp. 273
Author(s):  
Jie Jiang ◽  
Nan Zhang ◽  
Rui Min ◽  
Xin Cheng ◽  
Hang Qu ◽  
...  

This review discusses recent achievements on grating fabrications in polymer optical fibers doped with photosensitive materials. First, different photosensitive dopants in polymer optical fibers (POFs) are summarized, and their refractive index change mechanisms are discussed. Then, several different doping methods to fabricate the photosensitive POFs are presented. Following that, the principles of gratings, including standard fiber Bragg gratings (FBGs), tilted fiber Bragg gratings (TFBGs), chirped fiber Bragg gratings (CFBGs), phase-shifted fiber Bragg gratings (PSFBGs), and long period fiber gratings (LPFGs), are reported. Finally, fabrications of different gratings based on photosensitive POFs in the last 20 years are reported. We present our article clearly and logically, so that it will be helpful for researchers to explore a broad perspective on this proposed topic. Overall, the content provides a comprehensive overview of photosensitive POF fabrications and grating inscriptions in photosensitive POFs, including previous breakthroughs and recent advancements.


2018 ◽  
Vol 426 ◽  
pp. 401-409
Author(s):  
Angélica M. Mesa Yandy ◽  
Ricardo Duchowicz ◽  
Nélida A. Russo ◽  
José L. Cruz ◽  
Miguel V. Andrés

2004 ◽  
Vol 36 (6) ◽  
pp. 499-506 ◽  
Author(s):  
Zhiyong Zhao ◽  
Shuang Zhang ◽  
Yongsen Yu ◽  
Zhongchang Zhuo ◽  
Jian Zhang ◽  
...  

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