Results 21 to 30 of about 9,072 (243)

Bioresorbable optical fiber Bragg gratings [PDF]

open access: yesOptics Letters, 2018
We demonstrate, for the first time, an inscription and wet dissolution study of Bragg gratings in a bioresorbable calcium-phosphate glass optical fiber. Bragg gratings, with average refractive index changes of 5.8×10-4, were inscribed using 193 nm excimer laser radiation.
Pugliese D.   +6 more
openaire   +5 more sources

Effects of random phase and amplitude errors in optical fiber Bragg gratings [PDF]

open access: yes, 2000
This paper studies the influence of random phase and amplitude fabrication errors on the performance of optical filters based on fiber Bragg gratings (FBGs).
Feced, R., Zervas, M.N.
core   +1 more source

Strain and temperature sensors using multimode optical fiber Bragg gratings and correlation signal processing [PDF]

open access: yes, 2002
Multimode fiber optic Bragg grating sensors for strain and temperature measurements using correlation signal processing methods have been developed. Two multimode Bragg grating sensors were fabricated in 62/125 m graded-index silica multimode fiber ...
Jones, BE, Jackson, PR, Lim, J, Yang, QP
core   +1 more source

Wavelength tunable TFBG based microwave sensor using surface plasmon resonance

open access: yesEgyptian Journal of Remote Sensing and Space Sciences, 2016
A noble idea is used to propose a wavelength tunable tilted Fiber Bragg Gratings based microwave sensor using surface plasmon resonance. The Bragg wavelength shifts linearly about 6 pm/°C, due to the temperature change.
Imran Khan, Md. Mostafizur Rahman
doaj   +1 more source

Rapidly reconfigurable optical phase encoder-decoders based on fiber Bragg gratings [PDF]

open access: yes, 2006
We demonstrate the capacity for fast dynamic reconfiguration of optical code-division multiple access (OCDMA) phase en/decoders based on fiber Bragg gratings and a thermal phase-tuning technique.
Mokhtar, M.R.   +5 more
core   +1 more source

Modified coupled-mode model for thermally chirped polymer Bragg gratings [PDF]

open access: yes, 2010
A modified coupled-mode (CM) model is proposed for the optical behavior of thermally chirped Bragg gratings. The model accounts for the axial gradient in the modulation wavenumber, which has been ignored in the classical CM model. The model is used to
Sher, Ilai, Bar-Cohen, A., Han, B.
core   +1 more source

A simple method for fabricating phase-shifted fibre Bragg gratings with flexible choice of centre wavelength [PDF]

open access: yes, 2009
A simple technique for fabricating phase-shifted fibre Bragg gratings (PSFBGs) without the use of a phase-shifted phase mask is presented. Two, 3-mm long, standard fibre Bragg gratings (FBGs) were inscribed sequentially in singlemode fibre at the same
Ralph P. Tatam   +5 more
core   +1 more source

Laser-frequency locking techniques for high-sensitivity strain measurements by high-birefringence fiber Bragg gratings and resonators [PDF]

open access: yes, 2007
A new approach to simultaneously interrogate orthogonal axes of single Fiber- Bragg-Gratings (FBGs) and FBG-FabryPerot resonator sensors fabricated in linearly highly birefringent (HiBi) fibre is presented.
Ferraro, P.   +13 more
core   +1 more source

Localized Dispersive States in Nonlinear Coupled Mode Equations for Light Propagation in Fiber Bragg Gratings. [PDF]

open access: yes, 2009
Dispersion effects induce new instabilities and dynamics in the weakly nonlinear description of light propagation in fiber Bragg gratings. A new family of dispersive localized pulses that propagate with the group velocity is numerically found, and its ...
Martel Escobar, Carlos   +2 more
core   +2 more sources

Differential phase tracking applied to Bragg gratings in multi-core fibre for high accuracy curvature measurement [PDF]

open access: yes, 2006
High resolution quasi-static and dynamic curvature measurements are made by differential interferometric phase measurement of fibre Bragg gratings in separate cores of a multi-core fibre.
Flockhart, G M H   +8 more
core   +1 more source

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