The decoy-state protocol has been considered to be one of the most important methods to
protect the security of quantum key distribution (QKD) with a weak coherent source. Here we …

In the paper, the simple method of laser chirp parameters estimation is presented. It is based
on measuring time-domain distortions of chirped signal transmitted through dispersive fiber …

The decoy state protocol has been considered to be one of the most important methods to
protect the security of quantum key distribution (QKD) with a weak coherent source. Here we …

Cryptography is essential for secure communication in the digital era. Today, public-key
cryptography is widely employed, and has provided an efficient method for encrypting …

This paper reports a high-resolution amplified optical sampling time-resolved spectroscopy
technique for characterization of the chirp of laser diodes with no limitations on measuring …

Filtering of the chirped signal from a directly modulated laser with the narrowband optical
filter with a high roll-off allows to in-crease the dispersion tolerance of the transmitter …

The three technologies that are considered the key elements in building a metropolitan area
optical network are studied in this thesis. They are optical amplification, high-speed low cost …

Wavelength tuneable transmission is a requirement for future reconfigurable agile optical
networks as it enables cost efficient bandwidth distribution and a greater degree of …

Since the invention of the Erbium-doped fiber amplifier in 1987 and the preceding advances
in low-loss single-mode fiber technology, fiber optic wavelength-division-multiplexing …

A new method for chromatic dispersion compensation based on a real-time chirp feedback
is presented. The method makes use of an optical channel modulated at 10 Gbits/s by an …