The results of the experiment are presented. studies of the multifunctionality of microwave FOCLs based on remote heterodyne detection of signals from a two-frequency laser transmitter. Using heterodyne detection instead of direct detection can significantly improve line performance, such as modulation, frequency conversion, signal recovery, and transmission. Various detection methods and a FOCL scheme with remote heterodyne detection are considered.
Completion of the Japanese Information Highway
The completion of the Japanese Information Highway is reported, which is a system of optical cables laid along the bottom of the sea connecting 17 ground-based communication centers, each of which is also connected to optical cables laid on the islands of the Japanese archipelago (Hokkaido, Honshu, Kyushu, Shikoku.) The Japanese information highway operates in the mode of wavelength division multiplexing, each channel has 14 channels. The information transfer rate per channel is 2.5 Gbytes / s. The description of the backup system. The construction was carried out by the information highway HDD, which completed the development of a prototype of a new generation of fiber-optic communication systems using solitons (information transfer speed at a distance of 10,000 km 40 Gbit / s).
cable installer certifications
Mode coupling in single-mode spiral fibers in the presence of perturbations.
Experimental results are given. investigation of the coupling of modes in spiral optical single-mode fibers with a circular cross-section in the presence of perturbations. Equations of coupled modes for these fibers are derived and compared with similar equations for std. fibers. The transmission characteristics for spiral fibers with a round core are obtained. The results of the numerical analysis show that the ellipticity of modes and birefringence increases with an increase in the ellipticity of the fiber core.
integro-differential equations for the description of modes in channel waveguides with uniaxial anisotropy
The system of integrodifferential is formulated. equations for 2 transverse components of magn. and longitudinal components el. fields, which allows us to describe both guided and leaky modes of inhomogeneous channel waveguides characterized by a diagonal complex tensor. permeability.
Dispersion properties of the modes of chiral planar optical waveguides
An analytical study of the dispersion properties of the modes of chiral planar optical waveguides: symmetric and asymmetric. It is shown that all modes have circular polarization, while they are divided into 2 classes: with right and left polarizations; modes of one class, depending on the sign of the chiral parameter of the medium of the waveguide layer, can exist only in a limited frequency range, i.e. have critical frequencies in both the lower and upper parts of the frequency range. Graphs of the dispersion characteristics of the modes are presented, illustrating these new results.
Completion of the Japanese Information Highway
The completion of the Japanese Information Highway is reported, which is a system of optical cables laid along the bottom of the sea connecting 17 ground-based communication centers, each of which is also connected to optical cables laid on the islands of the Japanese archipelago (Hokkaido, Honshu, Kyushu, Shikoku.) The Japanese information highway operates in the mode of wavelength division multiplexing, each channel has 14 channels. The information transfer rate per channel is 2.5 Gbytes / s. The description of the backup system. The construction was carried out by the information highway HDD, which completed the development of a prototype of a new generation of fiber-optic communication systems using solitons (information transfer speed at a distance of 10,000 km 40 Gbit / s).
cable installer certifications
Mode coupling in single-mode spiral fibers in the presence of perturbations.
Experimental results are given. investigation of the coupling of modes in spiral optical single-mode fibers with a circular cross-section in the presence of perturbations. Equations of coupled modes for these fibers are derived and compared with similar equations for std. fibers. The transmission characteristics for spiral fibers with a round core are obtained. The results of the numerical analysis show that the ellipticity of modes and birefringence increases with an increase in the ellipticity of the fiber core.
integro-differential equations for the description of modes in channel waveguides with uniaxial anisotropy
The system of integrodifferential is formulated. equations for 2 transverse components of magn. and longitudinal components el. fields, which allows us to describe both guided and leaky modes of inhomogeneous channel waveguides characterized by a diagonal complex tensor. permeability.
Dispersion properties of the modes of chiral planar optical waveguides
An analytical study of the dispersion properties of the modes of chiral planar optical waveguides: symmetric and asymmetric. It is shown that all modes have circular polarization, while they are divided into 2 classes: with right and left polarizations; modes of one class, depending on the sign of the chiral parameter of the medium of the waveguide layer, can exist only in a limited frequency range, i.e. have critical frequencies in both the lower and upper parts of the frequency range. Graphs of the dispersion characteristics of the modes are presented, illustrating these new results.
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