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.
A WDM-compatible spectrally phase encoded-optical CDMA scheme is experimentally demonstrated. The system is
based on the use of chromatic dispersion, chosen to achieve a first-order Talbot effect, to obtain a frequency-to-time
mapping that allows subsequent coding/decoding of the signal spectrum by applying electro-optic phase modulation in
the time domain. Independent coding of each of the spectral lines from a pulsed source is achieved, thus guaranteeing an
efficient use of the spectrum. The use of electrooptic modulators to impose the codes enables a simple and rapid
reconfiguration of the used codes. Results are given for a system transmitting at 10 Gbps within a 0.7 nm optical window
using Hadamard codes.
We have demonstrated a reconfigurable time domain spectral phase encoding scheme for coherent optical code-divisionmultiple-
access application. The proposed scheme is based on the concept of temporal pulse shaping dual to spatial
arrangements. It uses Fiber Bragg Gratings as dispersive elements and electro-optic modulators. The data speed is 1.25
Gbps and the code is introduced at 10 Gcps, using a subset of the Hadamard codes with a length of 8 chips within a 0.7
nm optical window. The system is electrically reconfigurable and compatible with fiber systems and permits scalability
in the size of the codes by modifying only the phase modulator velocity.
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