Results 201 to 210 of about 37,370 (239)
Some of the next articles are maybe not open access.
FBG filter with minimal dispersion
Laser Physics, 2008An optimal filter for super-fast fiber-optic communication lines should cause minimal phase distortions. The simplest case of Bragg grating with a symmetric profile is considered. A distortion functional is presented, which is the mean square group delay over the Bragg reflection band at a fixed integral reflectivity.
O. V. Belai, D. A. Shapiro
openaire +1 more source
Effect of Strain and Temperature on FBG
2020 IEEE International Conference on Electronics, Computing and Communication Technologies (CONECCT), 2020In this paper, the effect of longitudinal strain and temperature on uniform Fiber Bragg Grating (FBG) is investigated using MATLAB. Measurement of strain or temperature in various applications is essential where mankind is restricted. Fiber optic technology gives a better result for the measurement of strain or temperature using FBG based sensors.
V Naga Bhaskar Chaluvadi +1 more
openaire +1 more source
FBG hydrophone: Theory and experiment
2008 1st Asia-Pacific Optical Fiber Sensors Conference, 2008A fiber Bragg grating (FBG) hydrophone with enhanced sensitivity is demonstrated. A novel piston-like diaphragm with a hard core fixed at the center is used as the sensing element. Theoretical analysis shows that the Young's modulus of the diaphragm and the radius of the hard core have significant effect on the pressure sensitivity.
Wentao Zhang +3 more
openaire +1 more source
Fabrication of FBGs With an Arbitrary Spectrum
IEEE Sensors Journal, 2008A fiber Bragg grating (FBG) with an arbitrary spectrum can be obtained as the addition of the contribution of some concatenated subFBGs written without phase jumps using the same phase mask. An adaptive filter is used to obtain the parameters of the different subFBGs required to reproduce the desired response.
Quintela, Antonio +4 more
openaire +2 more sources
Tunable FBGs for wavelength scanning
2015 Photonics North, 2015We demonstrate a low-cost tunable fiber Bragg grating (FBG) filter using electromagnetic tuning. Continuous wavelength scanning feature of this filter is evaluated by incorporating the same into a fiber laser system.
Pin Long, Mohammad Abtahi, Saju Thomas
openaire +1 more source
Accessing the Time Response of FBG
2007 Conference on Lasers and Electro-Optics - Pacific Rim, 2007We report on experimental results related to the time response of fiber Bragg gratings. From the experimental data it is possible to retrieve important parameters such as the response delay and the grating switching time, which are properties of relevance for understanding the operation of fast tuning devices.
Alexandre de Almeida Prado Pohl +1 more
openaire +1 more source
Advanced Photonics & Renewable Energy, 2010
A temporal-spectroscopy-based ultrafast FBG sensor interrogation system using two superimposed oppositely chirped FBGs is proposed. Compared with conventional temporal-spectroscopy-based FBG sensor interrogation systems, an improvement in interrogation resolution of two orders of magnitude is achievable.
Chao Wang, Jianping Yao
openaire +1 more source
A temporal-spectroscopy-based ultrafast FBG sensor interrogation system using two superimposed oppositely chirped FBGs is proposed. Compared with conventional temporal-spectroscopy-based FBG sensor interrogation systems, an improvement in interrogation resolution of two orders of magnitude is achievable.
Chao Wang, Jianping Yao
openaire +1 more source
FBG-Based Multidimensional QKD
2018 20th International Conference on Transparent Optical Networks (ICTON), 2018In this paper, we propose several FBG-based both weak coherent state and entanglement assisted multidimensional QKD (MQKD) protocols with mutually unbiased bases (MUBs) derived from the complex Hadamard matrices. We also propose how to implement them by using FBGs with orthogonal impulse responses.
openaire +1 more source
FBG Arrays for Quasi-Distributed Sensing: A Review
Photonic Sensors, 2021Minghong Yang +2 more
exaly
Characterization of an ORMOCER®-coated FBG sensor for relative humidity sensing
Measurement: Journal of the International Measurement Confederation, 2021Bin Shi, Jun-Yi Guo
exaly