This PDF file contains the front matter associated with SPIE Proceedings Volume 8410, including the Title Page, Copyright information, Table of Contents, and Introduction, and Conference Committee listing.

In recent works an alternative method for design of silica GeO2-doped graded-index multimode optical fibers 50/125 with low differential mode delay (DMD) was introduced. It is based on synthesis of special refractive index profile, providing the equalization of guided mode group velocities. A theoretical approbation of introduced fibers under the modeling of fiber optic link showed good results for a few-mode regime of high-speed laser-based serial data transmission. However on practice a different distributed core geometry parameter variation occurs in real optical fibers due to techniques features of preform manufacturing and fiber drawing. Here results of fiber optic link modeling with proposed multimode fibers 50/125 with low DMD under core diameter variation and refractive index profile deviation from the optimal form, and estimation of their influence on a few-mode optical signal distortion are represented.

In the article linear and nonlinear algorithms of electronic dispersion compensation of signals in fiber-optical transmission lines are reviewed. Thus algorithms of an inverse filtration with limitation of frequency band and gain limitation and also various variants of nonlinear phase filtration are investigated. Results of simulation and the comparative analysis of these algorithms by an estimation of efficiency of dispersion compensation by the Rayleigh criterion are represented.

The article is devoted to research of the approach to pulse distortions definition arising under action of birefringence effects in fiber. The analysis of existing methods of an such distortions estimation used on network is executed. Except increase of a pulse duration under polarizing dispersion it is offered to estimate effects connected with nonlinear birefringence and interaction polarizing dispersion with losses, dependent from polarization. Modeling the specified factors is carried out. The set of factors effectively describing such distortions of a pulse is offered.

This paper presents results of numerically solved model of fiber link including Kerr-nonlinearities, dispersive effects and polarization-mode dispersion. Different types of Gaussian pulses are modeled at step-index and non-zero dispersion shifted fibers.

Optical microelectromechanical systems (MEMS) technology or micro-optoelectromechanical systems (MOEMS) technology has experienced rapid growth in recent years and find its application in modern telecommunications, including fiber optics. This technology can provide high-performance features and new functionalities for optical and communication systems. Therefore due to their widespread applications, MEMS variable optical attenuators (VOA) have been one of the most attractive fiber optic components.

We analyze the most effective way to obtain microwave-photonic filter's coefficients, specifically implemented by electro- optical modulators. These devices are attractive to obtain desired number and sign of coefficients which results in high tunability and reconfigurability of filters. One have to decide which device will be the most appropriate in obtaining desired frequency response of the filter. The results of numerical simulations are presented for phase modulator, singleport mach-zehnder modulator and dual-port mach-zehnder modulator.

Problem of short-term operating point dc-drift of an asymmetric waveguide topology X-cut integrated optical Mach- Zehnder interferometer has been considered. A magnitude of dc-drift was estimated with optical intensity change after voltage switching. It was shown, that short-term dc-drift depends on initial operating point position. Two types of shortterm dc-drift were detected and described.

We introduce solution for linear-polarized guided modes propagating over weakly guiding optical fiber with an arbitrary refractive index profile. Proposed solution is based on well known Gaussian approximation and stratification method. A several samples of fiber profiles were considered to compare results which have been estimated by proposed method and finite element method. A good accuracy was noticed that submit correctness of introduced solution.

This paper presents algorithm of reconstruction of equivalent refractive index profile of optical fiber by differential mode delay diagrams. Calculations were performed for profile example of the sample multimode optical fibers.

Approximate analytic solutions for special cases of optical refractive index profile are proposed. Results of mode parameter estimation by introduced expressions under special refractive index profiles are presented.

This article presents a solution to the problem of synthesis of multilayer dielectric mirrors for the selective ROADM.

This article presents a solution to the problem of synthesis of multilayer dielectric mirrors for the selective ROADM.

A simple semi-empirical model for chromatic dispersion estimation of dispersion compensating photonic-crystal fibers in a limited range of wavelengths is presented in this paper. The proposed approach is widely used in the field of electromagnetic waves of the microwave range, for instance, for calculation of approximate estimates of the effectiveness of electromagnetic shields and here in this paper we adopted it for the estimation of chromatic dispersion of photonic-crystal fibers. It worth to note that this approach provides the possibility to evaluate approximate magnitude of the chromatic dispersion of dispersion compensating photonic-crystal fibers without extensive numerical calculations, but the main drawback of this method is that the validity of it is restricted only for the certain range of the wavelengths.

The aim of this paper is to examine the refractometric method of determining the octane number of gasoline and the presence of organic compounds in biological fuels. A feature of this method is π-shifted etched fiber Bragg grating as the sensing element utilization, which is characterized by a narrow bandwidth. The advantage of this method is the detection of changes in the refractive index at the level of 1,3×10^-5.

Retrospective space images processing information technology is presented in the report. The purpose of the technology is land use type change dynamics detection. The technology is based on land use types identification according to the results of initial multispectral image spectral channel conglomeration automatic classification (vegetative index).

A method is suggested for design of refractive optical surface intended for generation of the prescribed irradiance distribution. The method is based on the gradient optimization of the refractive surface represented as a bicubic spline in spherical coordinates. An optical element for direct-type backlight system was designed. The element produces uniformly illuminated hexagonal region with angular size of 143° at the distance of 15 mm from the Luxeon® Rebel Cool-White LED. The RMS error of generated irradiance distribution from the constant value is 3-4% with an energy efficiency greater than 81%. The simulation data shows that a large, uniformly illuminated region can be formed by means of a system of the indicated elements, located at the nodes of a rhombic grid.

We present a distributed image approach to image data management in distributed storage and parallel processing systems. This approach allows to avoid parallel processing bottlenecks and overlap concerned with image data read/write. The distributed image is defined as a set of the overlap fragments. Their overlap size is determined by the requirements of fault tolerance and dynamic load balancing. Within this concept, we propose a decentralized method for dynamic load balancing of parallel computing and visualization solutions for large-size distributed images.

This paper deals with blind deconvolution algorithm for the images distored in the vector channel. The obtained algorithm is compared to one of the most effective pre-existing algorithms. The article shows the results of the simulation and the images of different noise levels restored by each of the algorithms.

The paper considers possibility of using a system based on amplitude measurement method with a fiber Bragg grating as a sensitive element. The features of measurement technique is application of Bragg gratings with a special spectrum structure for different industries.

Results of experimental researches of "optical microcable in a microduct" system stability to effect of freezing water are presented. It is shown this system is steadier to water freezing in comparison to lighten optical cable in protective polymer tube.

In this article the methods for maintenance process simulation of fiber optic communication lines are analyzed. The choice of the method of functional network (FN) is proved. As a result of carried out calculations at modeling production the opportunity of use of the given method for estimation of efficiency and optimization of maintenance of fiber optic communication lines is shown.

The manuscript describes the system for monitoring the integrity of fiber-optical link, detection faults on the line with the coordinates of an accident or degradation of the cable. The developed system allows quick identification of problem areas on the line and takes corrective action in a shorter period than at the moment.

In this paper optical fibers identification device for communication lines is developed. The device allows to distinguish optical fibers for rapid determination of the need pair for merging.

The problems of RZ, CS-RZ and soliton generation and the problems of transmitters building for regional and intercontinental fiber optic-based solutions are proposed in order to assess their applicability and implementation of given formats and the soliton regime for the organization of access networks (1-10 Gb/s, ≤ 100 km). We have proposed and demonstrated in recent years an unique technique to synthesize the two frequency radiation by manipulating the amplitude and the phase of initial one frequency lightwave. The output frequencies are symmetrical relatively to suppressed initial one and have equal amplitudes and alternative phases. It's applications are considered.

Tutorial and training course «Optical Two-Frequency Domain Reflectometry» are devoted to the theory and technical equipment of reflectometers for fiber optical structures monitoring in two- frequency domain. Optical two-frequency probing radiation is synthesized on the base of unique manipulating technique of initial one-frequency light wave amplitude and phase. The output frequencies are symmetrical relatively to suppressed initial one and have equal amplitudes and alternative phases. The principle of two-frequency symmetrical probing radiation synthesis is summarized. A series of functional optical-sensing systems, including fiber-optic reflectometers and interrogators for multiplexed fiber Bragg gratings or Fabry-Perot interferometers sensors are introduced. Fully distributed fiber-optic strain sensing system based on Brillouin frequency shift is highlighted and four-wave mixing compensating system is also presented. Miscellaneous applications in biosensors and two-frequency signal forming for photonic microwave filters synthesis are also reviewed. This course recommended for students, undergraduates and graduate students of radio-engineering and telecommunication schools.

Problems relating to diffractive computer optics, prospective diffractive-optical-element-based (DOE-based) devices, and relevant information technologies are overviewed. Based on the studies conducted, benefits and disadvantages of the research facilities and associated technological procedures available at the Research & Education Center of Diffractive Computer Optics established jointly by the IPSI RAS and SSAU are analyzed.