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A radiation source module with a phase synchronization loop to form a coherent optical beam.

An optical module with a phase synchronization loop is presented, designed and manufactured for coherent optical beam formation systems. Beam Forming Devices m. used in multipath mobile communication systems with phased arrays. The module uses a phase synchronization loop with a tuning range of ~ 7-14 GHz.

On the possibility of generating and amplifying optical radiation at a wavelength of 1.3 μm in fiber optical fibers based on neodymium-doped quartz glass

The structure of a multilayer fiber waveguide is studied, which allows one to suppress radiation at a specific wavelength. It is shown that based on such a fiber made of ordinary quartz glass doped with neodymium ions and with appropriately selected parameters, fiber lasers and optical pulse amplifiers at a wavelength of 1.3 μm can be obtained.

Stable generation, characteristics and possible applications of square spatial solitons generated by optical parametric amplification.
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The possibility of generating square spatial soliton waves using optical parametric amplification has been experimentally demonstrated. The characteristics of solitons are investigated. Shows examples of possible applications.

Generation of spatial solitons using nonlinear waveguide modes.

The results of the experiment are presented. investigation of the possibility of generating two-dimensional spatial optical solitons in a nonlinear Kerr medium using nonlinear waveguide modes of a weakly conducting plane waveguide with a linear core and a nonlinear cladding. The waveguide is used as a pump source. Symmetric, antisymmetric, and asymmetric waveguide modes are considered. The parameters of single solitons, oscillating states of the boundary of 2 solitons and 2 interacting solitons for resp. waveguide modes.
Semiconductor lasers for optical communication technology
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Fiber-optic communication, due to its advantages, is in the first turn broadband, cost-effective and insensitive to electronic magn. interference to the present of time has occupied a dominant position on communication networks on a global scale. Subsequently, accelerated development of volumes of information transmitted over the international is expected. networks, in the first place on the Internet. According to the forecasts of US scientists in 2006, the amount of information on this network transmitted over long-distance communication channels will be equal to the volume of telephone information. The use of only a section of 1.3-1.6 microns of the optical range at the fiber optic link will allow the transmission of information volume of 40 TB / s, and the use of waves. seals - several times larger. The achieved attenuation of optical fibers of 0.2 dB / km at a wavelength of 1.55 μm is close to theory. limit 0.12 dB / km. Small-sized and relatively inexpensive micro-semiconductor LDs created in the USA and Russia in 1962-1970 are used as radiation sources at fiber-optic communication lines. Initially, they were manufactured on the basis of GaAIAs systems and could be implemented in the range from 850 to 1000 nm. Later, based on semiconductor systems ln 1 – x Cax As for P 1– y on InP substrates , LDs were created with radiation at wavelengths from 1.1 to 1.7 μm, which covered the minimum attenuation of the optical fiber. Subsequently, based on the improvement of technology and structure (the introduction of an internal and external distributed OS), the parameters of the LD improved, including the stability of the radiation frequency. A brief overview of the key points in the history of LDH development intended for use in fiber-optic communication systems is given.

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