1 OLSSON, N. A., ANDREKSON, A., BECKER, P. C, SIMPSON, J. R., TANBUNEK, T., LOGAN, R. A., PRESBV, H., and WECHT, K.: '4Gbit/s soliton data transmission experiment'. Technical Digest of Optical Fiber Communication Conference '90 (Optical Society of America, Washington, DC), 1990, paper PD4 2 NAKAZAWA, M., SUZUKI, K., YAMADA, E., a n d KIMURA, Y.: 'Distortion-free single-pass soliton communicatio...

Tadashi Takano Japan Aerospace Exploration Agency Institute of Space and Astronautical Science 3-1-1 Yoshinodai, Sagamihara Kanagawa 229-8510, Japan Abstract. The performances of optical and radio frequency communication systems are compared for long distance applications, such as deep space communications, where the signal-to-noise ratio SNR is crucial. We compare an optical communication syst...

Quantum key distribution (QKD) is a technique that allows two parties (Alice and Bob) to generate a secret key despite the computational and technological power of an eavesdropper (Eve) who interferes with the signals. Together with the Vernam cipher, QKD can be used for unconditionally secure data transmission. In a typical realization of QKD one can distinguish two phases in order to generate...

In an optical communication system, the optical signals from the transmitter are attenuated by the optical fiber as they propagate through it. Other optical components, such as multiplexers and couplers, also add loss. After some distance, the cumulative loss of signal strength causes the signal to become too weak to be detected. Before this happens, the signal strength has to be restored. Prio...

Optical fiber communication has brought us a new Internet society. In Japan, FTTH (Fiber to the Home) networks, in which optical fibers are installed directly to users’ homes, have been so popular that the number of contractors for FTTH service has exceeded fifteen millions as of May 2010. “Optical fiber,” “light source,” and “photo detector” are said to be three key elements of optical fiber c...

The principles of optical fiber communication and optical data storage have evolved over the past decade into industry standards for transmission, distribution, storage, and archival of digital audio, multimedia, and computer data. The fundamentals of these sophisticated systems are traditionally taught in the lecture hall, and laboratory exposure to the hardware is at the device rather than th...

Humans used optical signals intuitively for the purpose of communication in ancient times. Modern day optical communication systems are instead based on the fundamental understanding of information theory and technological advances in optical devices and components. The Optical Society (OSA) played a vital role in making fiber-optic communication practical for the information age. It is well kn...

The data transmission by high-speed optical networks has upward trend. Various techniques of multiplexing are used in optical communication networks to satisfy growing demands. Wavelength division multiplexing is currently mostly used multiplex method due to its great advantages. Since the current optical communication networks are based on internet protocol, the optical burst switching present...