Results 71 to 80 of about 120,889 (204)
Large bandwidth, highly efficient optical gratings through high index materials [PDF]
, 2008 We analyze the diffraction characteristics of dielectric gratings that feature a high index grating layer, and devise, through rigorous numerical calculations, large bandwidth, highly efficient, high dispersion dielectric gratings in reflection ...
Baldry +17 more
core +5 more sources
Twelve-Day Reinforcement-Based Memory Retention in African cichlids (Labidochromis caeruleus)
Frontiers in Behavioral Neuroscience, 2016 The formation of long-term memories for food sources is essential for the survival of most animals. Long-term memory formation in mammalian species has been demonstrated through a variety of conditioning tasks, however, the nature of long-term memory in ...
Erica Ingraham +4 more
doaj +1 more source
Tunable Filters Based on Cascaded Long-Period Polymer Waveguide Gratings
Photonic Sensors, 2022 Long-period waveguide grating based filters have attracted attention due to their flexible fabrication, a variety of materials and structures, low back reflection, low insertion loss, and excellent performance in the tuning range and temperature ...
Xin Shi, Rui Cao, Lingfang Wang
doaj +1 more source
Characterization of the DuPont photopolymer for three-dimensional holographic storage [PDF]
, 1994 DuPont's HRF-150 photopolymer film is investigated for use in three-dimensional holographic memories. Measurements of sensitivity, hologram persistence, the lateral spread of the photoinitiated reaction, and the variation of diffraction efficiency with ...
Curtis, Kevin, Psaltis, Demetri
core +1 more source
Long Period Fiber Grating Fabrication by Two-Step Infrared Femtosecond Fiber Laser Exposure
IEEE Photonics Journal, 2017 We develop a two-step infrared (IR) femtosecond fiber laser exposure technique to flexibly fabricate long period fiber gratings (LPFGs) with a high peak band-rejection efficiency of 35.4 dB, insertion loss of 4.36 dB, and 3 dB ...
Cong Zhang +4 more
doaj +1 more source
Transfer Matrix Analysis of the Unidirectional Grating-Assisted Codirectional Coupler [PDF]
, 2007 The unidirectional grating-assisted codirectional coupler (U-GACC) has recently been proposed. This unique structure permits irreversible coupling between orthogonal waveguide eigenmodes by means of simultaneous modulation of both the real and imaginary ...
Plant, David V., West, Brian R.
core +2 more sources
Advanced Electromagnetics, 2018 In this paper, a high sensitivity temperature sensor based on photonic crystal fiber long period grating (PCF-LPG) filled with ethanol is proposed and simulated by full vector finite element method. The relationship between the resonant wavelength shift,
R. Boufenar, M. Bouamar, A. Hocini
doaj +1 more source
Robust Design by Antioptimization for Parameter Tolerant GaAs/AlOx High Contrast Grating Mirror for VCSEL Application [PDF]
, 2013 A GaAs/AlOx high contrast grating structure design which exhibits a 99.5% high reflectivity for a 425nm large bandwidth is reported. The high contrast grating (HCG) structure has been designed in order to enhance the properties of mid-infrared VCSEL ...
Chevallier, Christyves +3 more
core +3 more sources
High-Order Modes Micro-Knot Excited by a Long-Period Fiber Grating
Sensors, 2017 We suggest a fiber micro-knot fabricated on a long-period fiber grating. The long-period fiber grating excites high-order modes into the micro-knot and transfers the output back to the Gaussian mode.
Shir Shahal +2 more
doaj +1 more source
, 2014 We present the experimental realization of transverse mode conversion in an optical fiber via an optically induced long-period grating. The transient gratings are generated by femtosecond laser pulses, exploiting the Kerr effect to translate intensity ...
Dobner, Sven +4 more
core +1 more source