Quantization of binding energy of structural solitons in passive mode-locked fiber lasers

On basis of numerical simulation of fiber laser passive mode locking, we have determined the quantum binding-energy levels for a pair of interacting structural solitons. These solitons have powerful wings and correspondingly large binding energies. It has been found that the field amplitude functions for steady states corresponding to neighboring energy levels have opposite parity. We have pointed out the analogy between the energy quantization for laser bound solitons and for a particle moving in potential well. The possibility of a coexistence of in-, opposite-, and π/2-phase soliton pairs has been found. In the case of multiple soliton trains, we have demonstrated the realization of highly stable soliton sequences with any required distribution along the soliton train of various types of bonds between neighboring pulses

Regimes of Passive Mode-Locking of Fiber Lasers

We present results of a numerical simulation and analysis of various regimes of passive mode-locking of fiber lasers including a single pulse  and multipulse operation, bound states of solitons, and harmonic passive mode-locking. Our results on the multipulse regimes consist of the multihysteresis dependences of a number of pulses in the laser cavity, of pulse peak intensities and an intracavity radiation energy on a pump power. The analysis of mechanisms of an intersoliton interaction in the laser cavity has been performed. The opportunity of the coding of information with the use of bound soliton sequences has been demonstrated. Various mechanisms for control of intersoliton interactionr are proposed

Peculiarities of soliton formation in passive mode-locked lasers with anisotropic fibers

Date du colloque : 06/2010International audienc

Historiography of youth associations of Finno-Ugric people in Russia (at the end of 20th – beginning of 21st century)

This work gives an analysis of major resources concerning youth associations of Finno-Ugric people of the end of the 20th and the beginning of the 21st century. Resource base offers the possibility to study the process of development of Finno-Ugric people cooperation regarding youth policy, its characteristic features and set out questions that need further studying.  The work has its practical implications. The main provisions of the work can be used as a base for further researches of this range of problems

Historiography of youth associations of Finno-Ugric people in Russia (at the end of 20th – beginning of 21st century)

This work gives an analysis of major resources concerning youth associations of Finno-Ugric people of the end of the 20th and the beginning of the 21st century. Resource base offers the possibility to study the process of development of Finno-Ugric people cooperation regarding youth policy, its characteristic features and set out questions that need further studying.  The work has its practical implications. The main provisions of the work can be used as a base for further researches of this range of problems

Spectral-selective management of dissipative solitons in passive mode-locked fibre lasers

We study properties of dissipative solitons in passive mode-locked fibre lasers due to additional intracavity narrow spectral selection. Such selection allows us to control the soliton velocity, the nature of the interaction between solitons (attraction or repulsion), to create a bistable state in which the velocity of a single soliton can have two different values, to realize an elastic particle-like collision between single solitons. In the investigated laser system, the soliton interaction distance can be considerably larger than the soliton duration, which allows the realization of passive harmonic mode-locking

Passive mode-locked fiber lasers: multiple pulse regimes and operation of high-energy pulses

On basis of numerical simulation we have investigated the multihysteresis phenomena in fiber mode-locked lasers, the regimes of multipulse operation, and the generation of high-energy pulses due to the dissipative soliton resonance. The obtained results ar

Passive mode-locking of a fiber laser operating in the regime of undumped regular spiking

Computer simulation is used to investigate a new regime of oscillation of fiber lasers in which passive mode-locking takes place simultaneously with the regime of regular undumped spiking induced by an intracavity saturable absorber. Such a superposition regime takes place when part of the output radiation of the laser operating in the regime of spiking is propagated through a fiber-optic delay line and is coupled back into the laser cavity in a time interval equal to the time interval between adjacent spikes. The advantages of the proposed regime of oscillation relative to other means of achieving passive mode-locking in fiber lasers are discussed. The proposed regime is of interest for obtaining reproducible high-energy light pulses

Dissipative Soliton Resonance in Passive Mode-Locked Lasers

By numerical simulation it is found that the dissipative soliton resonance prevents to an appearance in generation of new pulses with increasing pump power. It can be used for generation of high-energy pulses

Spectral-doublet rectangular pulses in passive mode-locked fiber lasers with anomalous dispersion

It has been found by numerical simulation that dissipative soliton resonance in passive mode-locked fiber lasers with anomalous dispersion can result in the formation of rectangular pulses with a spectral doublet. With an increase in the pump power and hence in the length of the pulses, the width of the peaks of the spectral doublet decreases, and their position remains unchanged. As a consequence, the generation of a single pulse in the laser resonator turns out to be stable, and the regime of a high-energy rectangular pulse with a doublet spectral structure is observed. The mechanisms involved in this regime are analyzed