Ms. Anastasia Bednyakova Profile

Anastasia Bednyakova

at Novosibirsk State University

SPIE Involvement:

Author

Publications (4)

Proceedings Article | 4 January 2023 Poster + Paper

SOA-based nonlinear reservoir for echo-state networks

D. Ivoilov, A. Bednyakova, I. Terekhov, S. Turitsyn

Proceedings Volume 12317, 123171F (2023) https://doi.org/10.1117/12.2644124

KEYWORDS: Nonlinear optics, Picosecond phenomena, Semiconductor optical amplifiers, Semiconductors, Optical semiconductors, Magnesium, Gaussian pulse, Transient nonlinear optics, Neural networks, Computer programming

Read Abstract +

Proceedings Article | 30 May 2022 Presentation

Broadband filterless tuneability in self-mode-locked Tm-doped fibre lasers

Dennis Kirsch, Anastasia Bednyakova, Maria Chernysheva

Proceedings Volume PC12142, PC121420S (2022) https://doi.org/10.1117/12.2626621

KEYWORDS: Fiber lasers, Optical filters, Laser systems engineering, Laser stabilization, Ultrafast phenomena, Short wave infrared radiation, Laser applications, Ions, Feedback control, Upconversion

Read Abstract +

Over the last decade, the ultrafast short-wave infrared (SWIR: 1600 – 2500 nm) laser market has been promisingly growing with Thulium-doped fibre systems as key players. An advantageous low-loss atmospheric transmission, a deep biological tissue penetration as well as various absorption lines of gases and biomolecules drive the demand on efficient light sources operating at this wavelength band. To unleash the full potential for expanding applications the laser system has to present highly integrated, cost-effective, rugged, compact turn-key solutions. Broadband wavelength tuneability can ensure a one more level of versatility for laser systems and extend areas of their applications. Principle limitations of achieving wide tuning wavelength ranges are generally defined by the spectral bandwidth of the gain and traditional tuneability techniques, typically relying on implementation of bulk and expensive tuning elements. In this presentation, we will present nearly 90 nm tuneability in ultrafast Tm-doped fibre laser spanning from 1873 to 1962 nm by implementing variable feedback for efficient control of the excitation level of the active medium. To realise self-mode-locking we explore a heavily-doped active fibre enriched with Tm ion clusters to reinforce its saturable absorption mechanism with 23% modulation depth and 95 MW/cm2 saturation intensity. We observed both experimentally and numerically intriguing implications on the saturation level, gain, and glass matrix. The highest laser efficiency is observed with 20% feedback, generating 580-fs soliton pulses at 1877 nm central wavelength with 1.5 nJ output pulse energy. Numerical model combining the nonlinear Shrödinger and population inversion rate equations for the gain medium helps to unveil nonlinear pulse evolution under the influence of dynamically varying gain spectrum. The resulting laser system presents a compact and straightforward approach to achieve laser generation with a broad wavelength tuneability, high laser stability, and power performance, which can be translated to unexplored so far wavelength ranges.

Proceedings Article | 20 August 2020 Poster + Paper

All-fiber pulsed laser source based on Raman dissipative soliton generation for biological tissue analysis

Innokentiy Zhdanov, Denis Kharenko, Anastasia Bednyakova, Mikhail Fedoruk, Sergey Babin

Proceedings Volume 11497, 1149717 (2020) https://doi.org/10.1117/12.2569010

KEYWORDS: Ultrafast lasers, Raman spectroscopy, Picosecond phenomena, Solitons, Raman scattering, Laser tissue interaction, Femtosecond phenomena, Laser sources, Fiber lasers

Read Abstract +

Proceedings Article | 11 March 2016 Paper

Mode-locked fiber laser with cascaded generation of coherent Raman dissipative solitons

Denis Kharenko, Anastasia Bednyakova, Evgenii Podivilov, Mikhail Fedoruk, Alexander Apolonskiy, Sergey Babin

Proceedings Volume 9728, 972836 (2016) https://doi.org/10.1117/12.2213010

KEYWORDS: Solitons, Fiber lasers, Raman spectroscopy, Mode locking, Femtosecond phenomena, Femtosecond fiber lasers, Phase modulation, Raman scattering, Picosecond phenomena, Polarization, Pulsed laser operation, Numerical simulations, Mid-IR

Read Abstract +

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Keywords/Phrases

Search In:

Publication Years