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Dynamic Partitioning and Coverage Control with Asynchronous One-to-Base-Station Communication

We propose algorithms to automatically deploy a group of mobile robots and provide coverage of a non-convex environment with communication limitations. In settings such as hilly terrain or for underwater ocean gliders, peer-to-peer communication can be impossible and frequent communication…

December 18, 2015 · by NS3 Tutorial ·

Widely tunable semiconductor laser based on step-chirped sampled Bragg grating

In this paper, a new kind of tunable distributed Bragg reflector (DBR) laser based on the step-chirped sampled Bragg grating (SBG), has been proposed and studied. Based on analysis and simulations, it has been shown that a comb-like reflectivity spectrum…

December 18, 2015 · by NS3 Tutorial ·

Whispering gallery mode resonators created by complex asymmetric nanoscale deformation of optical fibres

Recently, it has been shown that an asymmetric nanoscale deformation of translationally symmetric optical fibres can cause strong localization of whispering gallery modes. In particular, a whispering gallery mode nanobump microresonator has been introduced and its theory was developed. In…

December 18, 2015 · by NS3 Tutorial ·

Sparse Density Estimation on the Multinomial Manifold

A new sparse kernel density estimator is introduced based on the minimum integrated square error criterion for the finite mixture model. Since the constraint on the mixing coefficients of the finite mixture model is on the multinomial manifold, we use…

December 18, 2015 · by NS3 Tutorial ·

On chip ACPW fed monopole antenna

The increasing demand of communication systems has emphasized on low cost and small RF/Microwave transceiver. In this paper a compact Asymmetric Coplanar Waveguide (ACPW) fed monopole antenna is designed and fabricated on high resistivity silicon (HR-Si). Being uni-planar in nature…

December 18, 2015 · by NS3 Tutorial ·

All-optical poling kinetics of azophenylcarbazoles influenced by attached anchor

Second order non-linear optical features of anchor attached azophenylcarbazole based derivative 9-(2,3-epoxy)propyl-2-(2,3-epoxy)propoxy-3-(4-nitrophenyl)azo-9H-carbazole dispersed in polycarbonate was investigated. Using all-optical poling technique writing and reading kinetics of second order susceptibility gratings were measured. Theoretical modelling of the experimental results revealed one…

December 18, 2015 · by NS3 Tutorial ·

The effect of laser characteristics on millimetre wave optical generation techniques

In this paper two millimetre-wave (mm-wave) generation techniques involving optical heterodyne detection and the Mach-Zehnder Modulator (MZM) based optical comb technique are investigated. The heterodyne detection system is followed by a second order electrical feedback loop to reduce the phase…

December 18, 2015 · by NS3 Tutorial ·

Evanescent wave on the gold-coating tilt fiber grating surface and its sensing applications

The scatterings of P and S-polarized evanescent wave on the surface of a tilted fiber Bragg grating (TFBG) with a 50 nm thick gold coating were investigated experimentally by observing radiation patterns from discontinuities in the coating. The scattering intensity…

December 18, 2015 · by NS3 Tutorial ·

Bias drift free optoelectronic oscillator based on a Sagnac loop

In this paper, we proposed and experimentally demonstrated a novel bias drift free optoelectronic oscillator (OEO) based on Sagnac loop. In the experiment, we built a Sagnac loop as the modulator of OEO where a phase modulator was used to…

December 18, 2015 · by NS3 Tutorial ·

Subwavelength grating devices in SOI

We demonstrate subwavelength grating devices in silicon-on-insulator including Bragg gratings, racetrack resonators, and optical delay lines. The Bragg grating filter has a 3 dB bandwidth of 0.5 nm and a reflectivity of 90%; the racetrack resonator has a 3 dB…

December 18, 2015 · by NS3 Tutorial ·