We propose the use of a simplified model for the analysis of the scattering elements used in edge-lit systems. By modelling their behaviour as lambertian light sources whose properties depend on the size and geometry of the scatterer and LGP, it is possible to simulate the illuminance map of the edge-lit structure using only 2D ray-traced simulation. This reduces the computational complexity in the optimisation process used to calculate the scatterers distribution to achieve maximum uniformity in light extraction. The results obtained by comparison between the proposed algorithm and a commercial software demonstrate the validity of the proposal.
This work presents an experimental demonstration of a scheme based on an internally modulated fiber ring laser for high-sensitivity
temperature sensing. The attained temperature resolution has been as low as ± 2pm even when a commercial
FBG with a sensitivity of 10 pm/°C was used. Thus, a fivefold improvement in the temperature sensor resolution can be
achieved when compared to a simple FBG interrogation scheme. In addition to this, the measuring range could be selected
only by changing the frequency modulation of the fiber ring laser. This technology also allows to triple the photodiode
bandwidth unambiguously when temperature or strain measurements are carried out, which is a remarkable achievement
in term of cost reduction.
We propose and demonstrate the use of a fiber Bragg grating operated in transmission to build a simple, low-cost and
efficient optical carrier processor that permits to enhance the fiber-optic transmission of RF signals. It simultaneously
achieves an improvement in the detected electric power level by partially attenuating the optical carrier and the
capability of reconfiguring the link frequency response avoiding the carrier suppression effect due to the fiber-optic
chromatic dispersion.
A simple and fast fiber-grating model for the simulation and design of 1D photonic bandgap structures consisting of a row of circles etched in the ground plane of microstrip lines is proposed. It is based on the relationship found between the parameters of the photonic bandgap structure and those for an equivalent fiber Bragg grating with the same frequency- response shifted to the optical wavelength range.
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