Simultaneous refractive index and temperature sensing based on fiber surface waveguide and fiber Bragg gratings

2021 ◽  
Author(s):  
Dongning Wang ◽  
QI CHEN ◽  
Gao Feng
Keyword(s):  
Refractive Index ◽  
Fiber Bragg Gratings ◽  
Fiber Surface ◽  
Bragg Gratings ◽  
Temperature Sensing ◽  
Surface Waveguide

scholarly journals Sapphire-Derived Fiber Bragg Gratings for High Temperature Sensing

Crystals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 946
Author(s):  
Qi Guo ◽  
Zhixu Jia ◽  
Xuepeng Pan ◽  
Shanren Liu ◽  
Zhennan Tian ◽  
...  
Keyword(s):  
Refractive Index ◽  
High Temperature ◽  
Spectral Characteristics ◽  
Fiber Bragg Gratings ◽  
Single Mode ◽  
Bragg Gratings ◽  
Temperature Sensing ◽  
Direct Writing ◽  
Core Diameter ◽  
Application Range

In this paper, a sapphire-derived fiber (SDF) with a core diameter of 10 μm and a cladding diameter of 125 μm is fabricated by the melt-in-tube method, and fiber Bragg gratings (FBGs) with reflectivity over 80% are prepared by the femtosecond laser point-by-point direct writing method. By analyzing the refractive index distribution and reflection spectral characteristics of the SDF, it can be seen that the SDF is a graded refractive index few-mode fiber. In order to study the element composition of the SDF core, the end-face element distribution of the SDF is analyzed, which indicates that element diffusion occurred between the core and the cladding materials. The temperature and stress of the SDF gratings are measured and the highest temperature is tested to 1000 °C. The temperature and strain sensitivities are 15.64 pm/°C and 1.33 pm/με, respectively, which are higher than the temperature sensitivity of the quartz single-mode fiber. As a kind of special fiber, the SDF expands the application range of sapphire fiber, and has important applications in the fields of high-temperature sensing and high-power lasers.

High Temperature Sensing with Fiber Bragg Gratings in Sapphire Fibers

2014 ◽  
Author(s):  
Tino Elsmann ◽  
Tobias Habisreuther ◽  
Manfred Rothhardt ◽  
Hartmut Bartelt
Keyword(s):  
High Temperature ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Temperature Sensing ◽  
Sapphire Fibers

Fiber Bragg gratings with refractive index direct current component modulation

2008 ◽  
Author(s):  
Binbin Yan ◽  
Gang-Ding Peng ◽  
Kuiru Wang ◽  
Chongxiu Yu ◽  
Xiangjun Xin ◽  
...  
Keyword(s):  
Refractive Index ◽  
Direct Current ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Current Component

Optical Refractive-Index Sensor Based on Dual Fiber-Bragg Gratings Interposed With a Multimode-Fiber Taper

2007 ◽  
Vol 19 (1) ◽  
pp. 30-32 ◽  
Author(s):  
Li-Yang Shao ◽  
A. Ping Zhang ◽  
Wei-Sheng Liu ◽  
Hong-Yan Fu ◽  
Sailing He
Keyword(s):  
Refractive Index ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Refractive Index Sensor ◽  
Multimode Fiber ◽  
Fiber Taper

On the role of Ge-doping concentration in the refractive index rollover and thermal annealing characteristics of type IIa fiber Bragg gratings

2014 ◽  
Vol 53 (11) ◽  
pp. 117103
Author(s):  
Jitendra Kumar ◽  
Om Prakash ◽  
Ramakant Mahakud ◽  
Sachin Kumar Agrawal ◽  
Sudhir K. Dixit ◽  
...  
Keyword(s):  
Refractive Index ◽  
Thermal Annealing ◽  
Doping Concentration ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Ge Doping

scholarly journals 1.2.4 - First-order sapphire fiber Bragg gratings for high temperature sensing

2016 ◽  
Author(s):  
T. Elsmann ◽  
T. Habisreuther ◽  
A. Graf ◽  
M. Rothhardt ◽  
M. Schmidt ◽  
...  
Keyword(s):  
High Temperature ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Temperature Sensing ◽  
First Order ◽  
Sapphire Fiber

Femtosecond laser post-processing mechanisms for refractive index tuning of fiber Bragg gratings

2021 ◽  
Author(s):  
Timothy O. Imogore ◽  
Thorsten A. Goebel ◽  
Ria G. Krämer ◽  
Christian Matzdorf ◽  
Daniel Richter ◽  
...  
Keyword(s):  
Refractive Index ◽  
Femtosecond Laser ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Post Processing ◽  
Processing Mechanisms

Faser-Bragg-Gitter für Hochtemperaturanwendungen (Fiber Bragg Gratings for High Temperature Sensing Applications)

2004 ◽  
Vol 71 (10-2004) ◽  
pp. 555-562 ◽  
Author(s):  
Christoph Chojetzki ◽  
Torsten Klaiberg ◽  
Jens Ommer ◽  
Manfred Rothhardt ◽  
Daniel Betz
Keyword(s):  
High Temperature ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Temperature Sensing ◽  
Sensing Applications
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