Ytterbium-doped fibers for high-power fiber lasers
Dutta, A. (2021). Ytterbium-doped fibers for high-power fiber lasers. In M.M. Sinha, & S.S. Verma (Eds.), AMRP-2020 : 5th National e-Conference on Advanced Materials and Radiation Physics (Article 020071). American Institute of Physics. AIP Conference Proceedings, 2352. https://doi.org/10.1063/5.0052378
Published inAIP Conference Proceedings
© 2021 Author(s). Published by AIP Publishing.
Ytterbium (Yb) doped optical fibers are widely used in high-power applications and ultrafast lasing since they show adequate power-handling capability and provide desirable beam quality. Yb-doped fibers with large core area can support high power but often act as a multimode fiber and compromise the output beam quality. Hence, it is important to attain a proper balance between the power-handling capability and the beam quality. Yb-doped fibers as a gain medium in pulsed fiber laser systems are prone to nonlinear optical effects due to the presence of high peak power in the ultrashort pulses. Nonlinearity such as self phase modulation (SPM) affects the width and the shape of the pulse, both temporally and spectrally, by inducing chirp during its propagation along the fiber. In this work, finite element method was employed to compute linearly polarized transverse modes and the corresponding modal powers of Yb-fibers with different core areas to optimize the trade-off between the power-handling capability and the beam quality. The optimal fiber was implemented as a gain medium in a passively mode-locked fiber laser system to generate an ultrashort picosecond pulse. The spectral width of the picosecond pulse was studied as a function of pump power to spot the presence of SPM and chirp. To grow a better understanding on the chirped pulse propagation in the fiber, nonlinear Schrödinger equation was numerically simulated in the anomalous dispersion regime under the influence of initial chirp. The simulations reveal a strategy to compress a pulse temporally and utilize it in all-fiber chirped pulse amplification to mitigate nonlinearity in high power applications. ...
PublisherAmerican Institute of Physics
Parent publication ISBN978-0-7354-4105-7
ConferenceNational e-Conference on Advanced Materials and Radiation Physics
Is part of publicationAMRP-2020 : 5th National e-Conference on Advanced Materials and Radiation Physics
Publication in research information system
MetadataShow full item record
Showing items with similar title or keywords.
Modeling optical constants from the absorption of organic thin films using a modified Lorentz oscillator model Dutta, Arpan; Tiainen, Ville; Qureshi, Hassan Ali; Duarte, Luís; Toppari, J. Jussi (Optica Publishing Group, 2022)Optical constants of organic thin films can be evaluated using the Lorentz oscillator model (LOM) which fails to fit inhomogeneously broadened absorption of highly concentrated molecular films. In modified LOM (MLOM), the ...
Co-precipitation of Mg-doped Ni0.8Co0.1Mn0.1(OH)2 : effect of magnesium doping and washing on the battery cell performance Laine, Petteri; Hietaniemi, Marianna; Välikangas, Juho; Kauppinen, Toni; Tynjälä, Pekka; Hu, Tao; Wang, Shubo; Singh, Harishchandra; Lassi, Ulla (Royal Society of Chemistry, 2023)Co-precipitation of Ni0.8Co0.1Mn0.1(OH)2 (NCM811) and Mg-doped (0.25 wt% and 0.5 wt%) NCM811 precursors is carried out from concentrated metal sulphate solutions. In this paper, the aim is to study the role of magnesium ...
Synergistic effects of low-level magnesium and chromium doping on the electrochemical performance of LiNiO2 cathodes Laine, Petteri; Välikangas, Juho; Kauppinen, Toni; Hu, Tao; Wang, Shubo; King, Graham; Singh, Harishchandra; Tynjälä, Pekka; Lassi, Ulla (Springer, 2023)LiNiO2 cathode materials with magnesium and chromium doping were prepared using a simple low - cost and efficient co - precipitation and lithiation procedure. During this procedure, both magnesium and chromium form a ...
Loippo, Teemu; Kanniainen, Antti; Muhonen, Juha T. (American Physical Society (APS), 2023)Donor spin states in silicon are a promising candidate for quantum information processing. One possible donor spin readout mechanism is the bound exciton transition that can be excited optically and creates an electrical ...
López-Estrada, Omar; Selenius, Elli; Zuniga-Gutierrez, Bernardo; Malola, Sami; Häkkinen, Hannu (American Institute of Physic, 2021)The magnetic response of valence electrons in doped gold-based [M@Au8L8]q superatoms (M = Pd, Pt, Ag, Au, Cd, Hg, Ir, and Rh; L = PPh3; and q = 0, +1, +2) is studied by calculating the gauge including magnetically induced ...