Optical Fibers for Future Communication Systems

Characterization of Wavelength Tunable Lasers for Future Optical Communication Systems

The use of tunable lasers (TL) in dense wavelength division multiplexed (DWDM) networks for optical switching, routing and networking has gained a lot of interest in recent years. Employment of such TLs as tunable transmitters in wavelength packet switched (WPS) networks is one of the possible applications of these devices. In such systems, the information to be transmitted could be encoded ont...

Transmission Characteristics and Performance Analysis of Silica doped and Plastic Optical Fibers in Optical Communication systems

This paper has proposed the development of transmission capacity and characteristics of the bit rates of local area advanced optical communication networks over wide range of the affecting parameters. Dispersion characteristics in high-speed optical transmission systems is deeply analyzed over a span of optical wavelengths from 1.3 m up to 1.65 m. Two different fiber structures for dispersion...

Untappable communication channels over optical fibers from quantum-optical noise

Coherent light, as produced by lasers, gives rise to an intrinsic noise, known as quantum noise, optical noise or shot noise. AlphaEta is a protocol which exploits this physical phenomenon to obtain secure data encryption or key distribution over a fiber-optic channel in the presence of an eavesdropper. In this paper we focus on the cryptographic aspects of AlphaEta and its variants. Moreover, ...

Wireless Optical Communication Systems WIRELESS OPTICAL COMMUNICATION SYSTEMS

Timing jitter analysis for optical communication systems using ultrashort solitons and dispersion-decreasing fibers

We use adiabatic perturbation theory to calculate the timing jitter induced by fluctuations in solitons amplitude, frequency and position due to amplifiers noise when ultrashort solitons ( ~ ! ps) are propagated in dispersion-decreasing fibers. The result is applied to a high-speed soliton communication system with amplifiers spacing of 50-100 km. We show that the transition from a regime where...