Bragg gratings
Chalcogenide As2S3 Sidewall Bragg Gratings Integrated on LiNbO3 Substrate
... Bragg gratings have been widely used in integrated opti- cal devices such as switches, filters, laser, modulators and wavelength division multiplexing ...lateral) Bragg gratings show obvious ...
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Passive and active Bragg gratings for optical networks
... en/decoders and the tunable fibre Bragg gratings based on an S-bending technique. Three types of FBGs based optical phase en/decoders, including conventional discrete- phase en/decoders, new ...
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Characterization of Fiber Bragg Gratings as Thermal Sensors in Complex Environments.
... Chapter 3 investigates the effect of temperature gradients on FBG response. Chapter 3 begins with a full spectrum calibration of a Micron Optics sm130 dynamic swept laser optical interrogator that is used in Chapters 3, ...
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Force Sensing in Arthroscopic Instruments using Fiber Bragg Gratings
... The small-scale size and high-resolution response needed in the arthroscopic tools encouraged development of a separate fiber optic sensing system using fiber Bragg gratings. By adding slots in an inner ...
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Application of fibre Bragg gratings for the optimization of microwave-cured concrete
... fibre Bragg gratings (FBGs) as sensors for the temperature feedback control of concrete cured in a microwave environment has been presented and experimentally ...
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Fiber Bragg Gratings for Strain and Temperature Measurements in a Smart Tire
... Light propagates through the grating with negligible attenuation or signal variation. Only those wavelengths that satisfy the Bragg condition are affected and strongly back- reflected. The ability to accurately ...
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Magnetostriction Assessment with Strain Gauges and Fiber Bragg Gratings
... Power transformers have an imperative role in the future developments of the electrical grids. Treated as crucial assets for transportation and distribution of electrical energy, transformers are currently being studied ...
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Ultrafast optical switching using parity time symmetric Bragg gratings
... Recently a new class of optical waveguides, that compensates the inherent loss of photonic material by introducing gain, has opened new ways for the realization of functionalities such as unidirectional invisibility ...
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Effects of Nonlinearity on Wave Propagation in Fiber Bragg Gratings
... In this section we present numerical results for the nonlinear coupled mode equations (NLCME) for fiber Bragg gratings. We solve numerically NLCME (5) as an initial value problem. We assume that the fiber ...
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Microscopic and spectral characterisation of optical Fibre Bragg gratings
... fibre Bragg gratings suffer an inherent cross-sensitivity between temperature and ...fibre gratings, one of which is not bonded to the object being measured [7] and hence is not subject to the strain ...
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Greater than 90nm continuously wavelength tunable fibre Bragg gratings
... fibre Bragg gratings (FBGs) have developed into some of the most suitable devices for selecting DWDM signals with channel spacing as low as 25GHz [1], owing to the almost arbitrary design possibilities of ...
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Effects of random phase and amplitude errors in optical fiber Bragg gratings
... In this paper, we have studied the effects of random phase and amplitude errors in the performance of optical filters based on fiber Bragg gratings.. The amount of random phase errors in[r] ...
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Simulation of dual fibre Bragg gratings as a fabry-perot tunable filter
... A Fabry-Perot device can be used for measuring wavelengths with high precision, for studying the fine structure of spectrum lines and as a high quality optical resonator for a laser construction. Placing two identical ...
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The use of fibre Bragg gratings for ultrasonic Lamb wave detection and source location
... Fibre Bragg gratings offer some significant advantages over more traditional transducers such as piezoelectrics for ultrasound detection and are also dual purpose, since the same sensors can also be used ...
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Analysis and Design of All-Optical Switching in Apodized and Chirped Bragg Gratings
... the Bragg gratings is widely used, discussed in literature and applied for optical signal processing ...by Bragg gratings because of important role in optical ...
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UV written Bragg gratings
... Ibsen, UV-written Bragg gratings, Lecture 4 POWAG 2004.... Pulse encoding/decoding using super-structured gratings.[r] ...
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Pitch and roll sensing using fibre Bragg gratings in multicore fibre
... The objective of this paper is to describe an optical ‘attitude sensor’, measuring pitch and roll angles of the sensor by the elastic deformation produced by gravitational force acting on an optical fibre cantilever. The ...
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Real-time Cure Monitoring of Composites Using a Guided wave-based System with High Temperature Piezoelectric Transducers, Fiber Bragg Gratings, and Phase-shifted Fiber Bragg Gratings
... Gratings have been used as strain sensors for many years. Only recently, fiber Bragg gratins (FBGs) and phase-shifted fiber Bragg gratins (PS-FBGs) have been developed for use in ultrasonic sensing. ...
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Multi-parameter monitoring of electrical machines using integrated fibre Bragg gratings
... dynamic Bragg wavelength shifts of all 48 FBGs were captured simultaneously using a Micron Optics SM130 sensing interrogator unit, at a sampling rate of 2000 ...
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Fundamental properties of Bragg gratings and their application to the design of advanced structures
... amplitude-coded gratings [206] are manufactured by simply turning on or off the UV laser light in different chip ...e gratings [31]), further reducing the length of the device, but with a considerable ...
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