Alena Yuryevna Kolesnikova
@nsu.ru
Novosibirsk State University
RESEARCH, TEACHING, or OTHER INTERESTS
Physics and Astronomy, Atomic and Molecular Physics, and Optics, Statistical and Nonlinear Physics
Scopus Publications
Scopus Publications
Alena Yu. Kolesnikova and Ilya D. Vatnik
American Physical Society (APS)
Alena Kolesnikova and Ilya Vatnik
SPIE
We present the theory of the power threshold of nonlinear effects in a cylindrical microresonator with a small effective radius variation. We demonstrate the fundamental dependence of decrements on the taper position along z. This feature makes it possible to achieve critical coupling without ultra-precise control of the distance between the microresonator and the taper. The power optimization performed in this way allows us to reduce the nonlinear threshold from tens of watts to hundreds of milliwatts.
Oleg Gorbunov, Ilya D. Vatnik, Sergey V. Smirnov, Alena Kolesnikova, and Dmitry V. Churkin
SPIE
In present paper we employ numerical simulation, based on solution of system of coupled nonlinear Schrödinger equations, for demonstration of the possibility of ultra-narrow spectral generation in a Raman fiber laser with randomly distributed feedback. Line spectrum formation is caused by weak optical feedback due to Rayleigh backscattering if its impact overweighs the effects of nonlinear interactions. This can be observed either near the generation threshold, where generation power is low, or well above the threshold in case of artificially lowered nonlinear coefficient. Our simulation agrees well with previous experimental observations of ultra-narrow spectral modes in random fiber laser.
Alena Yu. Kolesnikova, Sergey V. Suchkov, and Ilya D. Vatnik
Optica Publishing Group
We study nonlinear mode interaction in the cylindrical microresonator with nanoscale radius variation. We obtain a model which describes the interplay between azimuthal modes and investigate the nonlinear dynamics of axial-azimuthal modes. We also define regimes of generation depending on the pump parameters. Using a properly designed radius longitudinal profile, we obtain broadband generation of stable low-repetition-rate frequency combs based on axial-azimuthal modes.
Alena Kolesnikova, Sergey Suchkov, and Ilya Vatnik
SPIE
We theoretically study the generation of a Kerr frequency combs in a cylindrical microresonator with an effective radius variation. We investigate a model describing the propagation of the whispering gallery modes on the surface of an optical fiber coupled to a source. We also discusses the details of the numerical scheme and the effect of numerical dispersion on the nonlinear generation of axial eigenmodes.
A. Yu. Kolesnikova, S. V. Suchkov, and I. D. Vatnik
IEEE
Here we develop a model of nonlinear dynamics of axial-azimuthal whispering gallery modes (WGMs) propagating at the boundary of a cylindrical microresonator with small variations of the effective radius. The model comprises a system of coupled nonlinear equations for different azimuthal modes, each experiencing evolution along the axial direction. Using the model, we optimize the parameters of the pump and obtain the generation of an axial-azimuthal optical frequency comb with a repetition rate of 12 GHz.
V Yu Prokopyev, S S Bakanov, V K Bodrov, E N Chernodarov, A A Doroshkin, V N Gorev, A Yu Kolesnikova, A S Kozlov, O. N. Kus, A V Melkov,et al.
IOP Publishing
Abstract The paper presents the NORBY 6U CubeSat nanosatellite’ launched on 28 September 2020 into a low-Earth orbit. The design of NORBY is briefly described’ the main characteristics of its subsystems are given’ and the results of the first flight tests are presented. The main features of the NORBY design are full hardware duplication of all subsystems and information interfaces’ as well as the use of LoRa modulation in radio communications between the satellite and a ground station. The first results of the NORBY flight tests confirm the effectiveness of the key technical solutions applied in the NORBY design. For the first time’ the operability of the LoRa modulation in satellite radio communications has been experimentally confirmed. The LoRa satellite-to-ground radio channel functioned sustainably at all tested parameters.
Alena Y. Kolesnikiva, Dmitry V. Kudashkin, Ilya D. Vatnik, and Dmitry V. Churkin
SPIE
We investigate an impact of a small particle located on the surface of a fiber resonator on the dynamics of the whispering gallery modes (WGM) circulating near the fiber surface. We consider a single molecule of fibrinogen and bovine serum albumin that is put in contact with the surface of the fiber. We have studied both temporal dynamics of optical pulses propagating at the WGM as well as changes in the spectrum of WGM due to impact of the particle.
Anatoly Pelemeshko, Alena Kolesnikova, Alexander Melkov, Vitaliy Prokopyev, and Alexander Zadorozhny
IOP Publishing
Abstract This paper presents a novel miniature module of orientation sensors for CubeSat nanosatellites. A high-precision sun sensor and a detector of the Earth horizon are located in one small module body. A two-axis digital sun sensor built into the orientation module is based on the registration of the sunspot formed on the matrix CMOS image sensor when the sun’s rays pass through a pinhole in the front mask. A commercially available miniature array of infrared thermometers is used as the Earth horizon sensor. The paper is mainly devoted to the development of the sun sensor. For laboratory tests, a prototype of the orientation module was developed. Laboratory tests and sun sensor calibration confirmed the sun sensor field of view of 120° and made it possible to determine its angular resolution of ±0.015°. The final accuracy of determining the direction to the Sun by the sensor that was calibrated using the existing experimental setup is ±0.15° with 95% confidence. It is possible to improve the accuracy of the sun sensor by improving the experimental setup for its calibration.