Results 71 to 80 of about 25,377 (291)
Thermo‐Derived Cholesteric Liquid Crystal Elastomer Pattern with Composite Structural Colors
Advanced Optical Materials, EarlyView.A thermochromic cholesteric liquid crystal (CLC) oligomer was synthesized for the preparation of CLC elastomer (CLCE) films with dual reflection bands. Subsequently, a CLCE pattern with composite structural colors was prepared, which was suitably applied for decoration and anti‐counterfeiting.
Li Zhong, Yi Li, Wei Liu, Yonggang Yang
wiley +1 more source
On-chip photoelectric hybrid convolutional accelerator based on Bragg grating array
Results in PhysicsWe propose an on-chip photoelectric hybrid convolution accelerator based on Bragg grating array. The weight of the convolution kernel can be adjusted by controlling the central wavelengths of the Bragg grating array.
Kaiteng Cai +6 more
doaj +1 more source
Structural Health Monitoring of a Tall Building during Construction with Fiber Bragg Grating Sensors
International Journal of Distributed Sensor Networks, 2012 Fiber Bragg grating sensors demonstrate a great potential as a structural health monitoring tool for civil structures to ensure structural integrity, durability, and reliability.
D. S. Li, L. Ren, H. N. Li, G. B. Song
doaj +1 more source
Bioresorbable optical fiber Bragg gratings [PDF]
Optics 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 +4 more sources
A fibre Bragg grating based inclinometer system for ground movement measurement [PDF]
, 2010 The measurement of ground movement is an essential part of many geotechnical engineering operations. For decades, inclinometer systems have traditionally been used for this purpose to provide crucial information to engineers and researchers.
Ricardo Correia +11 more
core +1 more source
Advanced Optical Materials, EarlyView.A theoretical model is developed to visualize three‐dimensional refractive index profiles in transmission holographic gratings. In this work, it is applied to photopolymerizable hydrogels, enabling detailed analysis of the internal structure of recorded holograms and their evolution under different degradation conditions.
Belén Nieto‐Rodríguez +4 more
wiley +1 more source
Study of Nonlinear Periodic Optical System
Journal of Mathematical and Fundamental Sciences, 2019 We give a brief review of some results of our study on one-dimensional shallow nonlinear Bragg grating with nonlinear modulation and deep nonlinear Bragg grating.
H. Alatas +3 more
doaj
A Bragg grating sensor for detection of monolayers at a surface [PDF]
, 2009 Planar waveguides can be written with a UV-laser into photosensitized silica to produce a wide range of optical devices. Careful modulation of two interfering beams allows Bragg gratings to be directly written into the channel (Figure 1.a).
Smith, P.G.R. +7 more
core +1 more source
Waveguide Geometry–Driven Trade‐Offs in Resonant Cavity Sensor Performance
Advanced Optical Materials, EarlyView.Waveguide geometry governs the interplay between sensitivity, intrinsic Q‐factor, and wavelength noise in silicon nitride resonant sensors. Contrary to intuition, higher sensitivity does not ensure superior performance. Low‐noise, high‐Q ridge resonators achieve the lowest detection limits, revealing that detection is ultimately constrained by noise ...
Mohammad Talebi Khoshmehr +6 more
wiley +1 more source
Advances in Mechanical Engineering, 2015 A novel fiber Bragg grating direct current sensor with intrinsic temperature compensation is presented in this article. The operating principle of the sensor is based on the deflection of a cantilever beam due to the electromagnetic force between a ...
Yuan Yao +4 more
doaj +1 more source