Very low group delay ripple characteristics of fibre Bragg grating with chirp induced by an S-curve bending technique

2001 ◽  
Vol 37 (7) ◽  
pp. 449 ◽  
Author(s):  
T. Komukai ◽  
T. Inui ◽  
M. Nakazawa
Keyword(s):  
Group Delay ◽  
Bragg Grating ◽  
Fibre Bragg Grating ◽  
S Curve

scholarly journals Optimised square passband fibre Bragg grating filter with in-band flat group delay response

1998 ◽  
Vol 34 (8) ◽  
pp. 800 ◽  
Author(s):  
M. Ibsen ◽  
M.K. Durkin ◽  
M.J. Cole ◽  
R.I. Laming
Keyword(s):  
Group Delay ◽  
Bragg Grating ◽  
Fibre Bragg Grating ◽  
Delay Response

High-performance 40 Gbit∕s fibre Bragg grating tunable dispersion compensator fabricated using group delay ripple correction technique

2003 ◽  
Vol 39 (16) ◽  
pp. 1196 ◽  
Author(s):  
M. Sumetsky ◽  
N.M. Litchinitser ◽  
P.S. Westbrook ◽  
P.I. Reyes ◽  
B.J. Eggleton ◽  
...  
Keyword(s):  
High Performance ◽  
Group Delay ◽  
Bragg Grating ◽  
Fibre Bragg Grating ◽  
Dispersion Compensator ◽  
Correction Technique

Group delay ripple in fibre Bragg grating tunable dispersion compensators

2002 ◽  
Vol 38 (24) ◽  
pp. 1505 ◽  
Author(s):  
R.L. Lachance ◽  
M. Morin ◽  
Y. Painchaud
Keyword(s):  
Group Delay ◽  
Bragg Grating ◽  
Fibre Bragg Grating

Amplification of fibre Bragg grating reflectivity by post-writing exposure with a 193 nm ArF laser

1994 ◽  
Vol 30 (14) ◽  
pp. 1133-1134 ◽  
Author(s):  
P. E. Dyer ◽  
K. C. Byron ◽  
R. J. Farley ◽  
R. Giedl
Keyword(s):  
Bragg Grating ◽  
Fibre Bragg Grating ◽  
Arf Laser ◽  
193 Nm

Microwave phase shifter based on fibre Bragg grating

1998 ◽  
Vol 34 (21) ◽  
pp. 2051 ◽  
Author(s):  
B. Ortega ◽  
J.L. Cruz ◽  
M.V. Andrés ◽  
A. Díez ◽  
D. Pastor ◽  
...  
Keyword(s):  
Phase Shifter ◽  
Bragg Grating ◽  
Fibre Bragg Grating ◽  
Microwave Phase Shifter

scholarly journals Photon-magnon response to fluid variability and saturation levels in sandstone reservoirs

2020 ◽  
Vol 17 (6) ◽  
pp. 1065-1074
Author(s):  
Abdullah Musa Ali ◽  
Amir Rostami ◽  
Noorhana Yahya
Keyword(s):  
Oil Recovery ◽  
Relative Permittivity ◽  
Wave Interaction ◽  
Heterogeneous Porous Media ◽  
Injection System ◽  
Bragg Grating ◽  
Fibre Bragg Grating ◽  
Core Flooding ◽  
Oil Saturation ◽  
Fluid Saturation

Abstract The need to recover high viscosity heavy oil from the residual phase of reservoirs has raised interest in the use of electromagnetics (EM) for enhanced oil recovery. However, the transformation of EM wave properties must be taken into consideration with respect to the dynamic interaction between fluid and solid phases. Consequently, this study discretises EM wave interaction with heterogeneous porous media (sandstones) under different fluid saturations (oil and water) to aid the monitoring of fluid mobility and activation of magnetic nanofluid in the reservoir. To achieve this aim, this study defined the various EM responses and signatures for brine and oil saturation and fluid saturation levels. A Nanofluid Electromagnetic Injection System (NES) was deployed for a fluid injection/core-flooding experiment. Inductance, resistance and capacitance (LRC) were recorded as the different fluids were injected into a 1.0-m long Berea core, starting from brine imbibition to oil saturation, brine flooding and eventually magnetite nanofluid flooding. The fluid mobility was monitored using a fibre Bragg grating sensor. The experimental measurements of the relative permittivity of the Berea sandstone core (with embedded detectors) saturated with brine, oil and magnetite nanofluid were given in the frequency band of 200 kHz. The behaviour of relative permittivity and attenuation of the EM wave was observed to be convolutedly dependent on the sandstone saturation history. The fibre Bragg Grating (FBG) sensor was able to detect the interaction of the Fe3O4 nanofluid with the magnetic field, which underpins the fluid mobility fundamentals that resulted in an anomalous response.

Sign in / Sign up

Export Citation Format

Share Document