S. Chaiyasoonthorn

Fast and slow light generation using chaotic signals in nonlinear microring resonators for communication security

We propose a new system of signal security using nonlinear micro ring resonators for optical communication system. When a soliton pulse is input into the system, the chaotic signal is generated and multiplexed into the optical link. The chaotic waveform can be canceled using an add/drop device connected into the transmission link. Using the appropriate ring parameters, the original signal can be retrieved. An other application results from the fact that the fast and slow light behaviors can be presented, and can be seen using the add/drop multiplexers. In some cases, we can generate signal to obtain the two identical “signal” and “ghost” signals, which are observed in a different time frame. In this application, communication security can be performed when the required information is multiplexed and performs the link using the chaotic signal, fast and slow light, and signal and ghost signals, where the original signal can be retrieved by the known clients.

High Capacity Mobile Ad Hoc Network Using THz Frequency Enhancement

We propose a new design of the high channel capacity in Mobile Ad Hoc Network that uses the dense wave-length division multiplexing wavelength enhancement, in which the increasing in channel capacity and sig-nal security can be provided. The increasing in number of channel can be obtained by the increasing in wavelength density, while the security is introduced by the specific wavelength filter, which is operated by the Ad Hoc node operator and link with other nodes in coverage by dedicated one-to-one in direct or relay node. The optical communication wavelength enhancement is reviewed. The advantage is that the proposed system can be implemented and used incorporating with the existed communication link in both infrastruc-ture-based and Ad Hoc networks wireless network, where the privacy can be provided, which is discussed in details.

Attosecond Pulse and Beyond Generation Based on Multi-Stage Micro Ring Resonators

We firstly propose the simple system of an attosecond light pulse generation by using a soliton pulse circulating in the integrated micro ring devices. The ultra short pulse in the atto scale regime and its beyond can be easily generated. Simulation results obtained have shown that the generation of a very narrow pulse and sharp tip is achieved. In principle, light pulse known as soliton pulse is input into a three stage micro ring resonators, where the ring radii are within the range from 5-15 microns. With some selected parameters such as ring radius, coupling ratio and nonlinear refractive index, the attosecond pulse is generated and achieved. The potential applications of using such a narrow pulse for new generation optical lithography, high density CD writing, high resolution interferometer, surface roughness and high speed optical computing, quantum computing are discussed.

Building Automatic Packet Report System to report position and radiation data for autonomous robot in the disaster area

This paper purposed to implement long range data communication by using APRS protocol to send location with Radiation measuring of Geiger Counter system, conceptual that automatically collects data and send the entries packet to the internet stream and be able to pinpoint the location of the Autonomous Robot (while deploy around the radiation disaster area) via Online Maps, the main goal, expected to able to establish long distance data communication network between APRS Robot and Internet Gateway(I-Gate) approx radius of 10 Kilometers.

Chaotic signal filtering device using a serial connection of micro-ring resonators

This paper proposes a system of signal security using the optic series waveguide micro ring resonator, where the chaotic noise generation and cancellation can be performed. The required communication signals can be multiplexed with the generated chaotic noise in a micro ring resonator before transmission. The required information can be recovered via optic series waveguide micro ring resonator by a specific user at the output port of the waveguide micro-ring resonator. Simulation results obtained have shown the potential of applications which is closed to the practical applications, especially, The required information can be retrieved by the specified users. The ring parameters used with the ring radii are ranged between 10-20 μm, κ1 = κ2 = 0.0225 and n2 = 2.2 × 10-15 m2/W. The simulation results obtained have shown the potential of using such a proposed device for tunable band-pass and band-stop filters, which can be used for the information security in the system by the optic series waveguide micro ring resonator.