Optical fibre for fabricating long-period gratings with low temperature sensitivity within selected temperature range

2005 ◽  
Vol 41 (20) ◽  
pp. 1106
Author(s):  
J.A. Farroni ◽  
A.L.G. Carter ◽  
V. Grubsky ◽  
K. Tankala ◽  
N.J. Jacobson ◽  
...  
Keyword(s):  
Low Temperature ◽  
Optical Fibre ◽  
Temperature Sensitivity ◽  
Temperature Range ◽  
Long Period ◽  
Long Period Gratings

scholarly journals Sensitivity Characterization of Cascaded Long-Period Gratings Operating near the Phase-Matching Turning Point

Sensors ◽  
2020 ◽  
Vol 20 (21) ◽  
pp. 5978
Author(s):  
Wei Zhou ◽  
Yanli Ran ◽  
Zhijun Yan ◽  
Qizhen Sun ◽  
Chen Liu ◽  
...  
Keyword(s):  
Refractive Index ◽  
Temperature Sensitivity ◽  
Turning Point ◽  
Phase Matching ◽  
Long Period ◽  
Long Period Gratings ◽  
High Measurement ◽  
Surrounding Refractive Index ◽  
Wavelength Resolution ◽  
Quality Factor Q

We characterized a cascaded long-period gratings (LPGs)-based sensor that was operating at the phase-matching turning point (PMTP). The cascaded LPGs constructed an in-fiber Mach–Zehnder interferometer (MZI), which exhibited a series of high-quality-factor (Q) narrow-bandwidth resonance peaks. As the LPG operated at the PMTP, the proposed sensor showed an ultrahigh refractive index (RI) and temperature sensitivity, and high measurement precision. In this study, we took an in-depth look at the effects of grating separation on Q-factor and sensitivity. The results showed that the sensitivity to the surrounding refractive index (SRI) reached 4741.5 nm/RIU at 1.4255 and 2138 nm/RIU, over the range of 1.335–1.373. In addition, the temperature sensitivity was around 4.84 nm/°C. With a 0.02 nm wavelength resolution, the RI and temperature sensing limits were 9.3 × 10−6 RIU and 5.5 × 10−3 °C.

Application of diamond-like carbon films in optical fibre sensors based on long-period gratings

2007 ◽  
Vol 16 (4-7) ◽  
pp. 1374-1377 ◽  
Author(s):  
M. Smietana ◽  
J. Szmidt ◽  
M.L. Korwin-Pawlowski ◽  
W.J. Bock ◽  
J. Grabarczyk
Keyword(s):  
Optical Fibre ◽  
Carbon Films ◽  
Diamond Like Carbon ◽  
Long Period ◽  
Optical Fibre Sensors ◽  
Long Period Gratings

A femtosecond laser-inscribed fine-core long-period grating with low temperature sensitivity

2020 ◽  
Vol 13 (4) ◽  
pp. 737-744
Author(s):  
MING Xin-yu ◽  
◽  
◽  
GUO Qi ◽  
XUE Zhao-kang ◽  
...  
Keyword(s):  
Low Temperature ◽  
Femtosecond Laser ◽  
Temperature Sensitivity ◽  
Long Period Grating ◽  
Long Period

The spectral sensitivity of long period gratings fabricated in elliptical core D-shaped optical fibre

2006 ◽  
Vol 259 (2) ◽  
pp. 537-544 ◽  
Author(s):  
T. Allsop ◽  
H. Dobb ◽  
V. Mezentsev ◽  
T. Earthgrowl ◽  
A. Gillooly ◽  
...  
Keyword(s):  
Spectral Sensitivity ◽  
Optical Fibre ◽  
Long Period ◽  
Long Period Gratings ◽  
Elliptical Core

High-temperature sensitivity of long-period gratings in B-Ge codoped fiber

2001 ◽  
Vol 13 (8) ◽  
pp. 818-820 ◽  
Author(s):  
Xuewen Shu ◽  
T. Allsop ◽  
B. Gwandu ◽  
Lin Zhang ◽  
I. Bennion
Keyword(s):  
High Temperature ◽  
Temperature Sensitivity ◽  
Long Period ◽  
Long Period Gratings ◽  
High Temperature Sensitivity

scholarly journals All-optical switching based on optical fibre long period gratings modified bacteriorhodopsin

2018 ◽  
Vol 101 ◽  
pp. 162-171 ◽  
Author(s):  
S. Korposh ◽  
S. James ◽  
M. Partridge ◽  
M. Sichka ◽  
R. Tatam
Keyword(s):  
Optical Fibre ◽  
Optical Switching ◽  
Long Period ◽  
Long Period Gratings ◽  
All Optical ◽  
All Optical Switching
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