"Gumenyuk, Regina" - Selaus tekijän mukaan TUNICRIS-julkaisut

Viitteet 1-20 / 40

    • 550 W picoseconds pulsed compact laser system based on a Yb-doped spun tapered double-clad fiber 

      Fathi, Hossein; Motorin, Evgenii; Lindner, Florian; Grishchenko, Andrey; Gribanov, Evgenii; Wondraczek, Katrin; Gumenyuk, Regina; Filippov, Valery
      Proceedings of SPIE - The International Society for Optical Engineering (2024)
      conference
      <p>We demonstrate the dramatic progress in Yb-doped spun tapered double-clad fiber amplifiers delivering up to 550 W of average power with single mode spatial profile and 50 ps pulses at 20 MHz repetition rate. The ...

    • Active tapered double-clad fiber with low birefringence 

      Fedotov, Andrei; Ustimchik, Vasilii; Rissanen, Joona; Kolosovskii, Alexander; Voloshin, Victor; Vorob’ev, Igor; Gumenyuk, Regina; Chamorovskiy, Yuri; Filippov, Valery (24.05.2021)
      article
      We addressed the problem of a state of polarization (SOP) drift caused by heating under intense clad pumping in different types of active tapered double-clad fibers. We investigated experimentally the variations of the SOP ...

    • Advanced multimodal laser imaging tool for urothelial carcinoma diagnosis (AMPLITUDE) 

      Kurilchik, Sergey; Gacci, Mauro; Cicchi, Riccardo; Pavone, Francesco S; Morselli, Simone; Serni, Sergio; Chou, MH; Närhi, Mikko; Rafailov, Edik; Stewart, Neil; Lennon, Cordelia; Gumenyuk, Regina (01.03.2020)
      article

    • All-fiber mode-locked laser at 0.98 µm 

      Aleshkina, Svetlana S.; Lipatov, Denis S.; Velmiskin, Vladimir V.; Kochergina, Tatyana A.; Fedotov, Andrei; Gumenyuk, Regina; Kotov, Leonid V.; Temyanko, Valery L.; Bubnov, Mikhail M.; Guryanov, Aleksey N.; Likhachev, Mikhail E.
      Proceedings of SPIE (2020)
      conference

    • All-fiber mode-locked laser at 977 nm 

      Aleshkina, Svetlana S.; Lipatov, Denis S.; Velmiskin, Vladimir V.; Kochergina, Tatyana A.; Fedotov, Andrey; Gumenyuk, Regina; Kotov, Leonid V.; Temyanko, Valery L.; Bubnov, Mikhail M.; Guryanov, Alexey N.; Likhachev, Mikhail E.
      Proceedings of SPIE - The International Society for Optical Engineering (2020)
      conference
      <p>In this paper, we have developed Yb-doped fiber suitable for creation of all-fiber seed laser schemes operating near 977 nm. The fiber was based on a ring-doping design (cladding was partially doped with Yb-ions), ...

    • All-fiber polarization-maintaining mode-locked laser operated at 980  nm 

      Aleshkina, Svetlana S.; Fedotov, Andrei; Korobko, Dmitrii; Stoliarov, Dmitrii; Lipatov, Denis S.; Velmiskin, Vladimir V.; Temyanko, Valery L.; Kotov, Leonid V.; Gumenyuk, Regina; Likhachev, Mikhail E. (01.04.2020)
      article
      For the first time, to the best of our knowledge, we present an all-fiber polarization-maintaining passively mode-locked picosecond laser operated at 980 nm. The laser cavity had a ring configuration with a semiconductor ...

    • Amplifier similariton generation from a Yb-doped all-normal-dispersion fiber laser employing a hybrid-mode-locking technique 

      Liu, Xinyang; Närhi, Mikko; Korobko, Dmitry; Gumenyuk, Regina
      Proceedings of SPIE - The International Society for Optical Engineering (2022)
      conference
      <p>Apart from the classical nonlinear polarization rotation (NPR) mechanism, we incorporate an additional stabilization mechanism of frequency shifting in a Yb-doped all-normal-dispersion fiber laser oscillator. The ...

    • Analysis of upconversion nanoparticles as an active medium for upconversion light sources 

      Fedotov, Andrei; Pominova, Daria; Orlovskaya, Elena; Orlovskii, Yurii; Niemi, Tapio; Gumenyuk, Regina
      Proceedings of SPIE : the International Society for Optical Engineering (01.03.2019)
      conference

    • Coherent beam combining of optical vortices 

      Fathi, Hossein; Närhi, Mikko; Barros, Rafael; Gumenyuk, Regina (15.07.2024)
      article
      We experimentally demonstrate the power scaling of optical vortices using the coherent beam combining technique, encompassing topological charges ranging from ℓ =1 to ℓ =5 realized on the basis of a Yb-doped fiber short-pulsed ...

    • Design guidelines for ultrashort pulse generation by a Mamyshev regenerator 

      Närhi, Mikko; Fedotov, Andrei; Aksenova, Kseniia; Fiebrandt, Julia; Schönau, Thomas; Gerecke, Mario; Gumenyuk, Regina (10.05.2021)
      article
      We study numerically the possibility of using various gain-switched seed laser pulse parameters and fibers for a low-cost, all-fiber Mamyshev regenerator scheme. We find that for increasing pulse durations, sufficient ...

    • Design of nonlinear pulse shaper for flexible repetition rate ultrashort pulse generation 

      Närhi, Mikko; Ranne, Katariina; Gumenyuk, Regina
      EPJ Web of Conferences (31.10.2024)
      conference
      <p>Nonlinear pulse shaping based on Mamyshev regenerator is a powerful approach for ultrashort pulse generation. The performance strongly depends on the initial seed parameters. We investigate and design a nonlinear ...

    • Double-clad ytterbium-doped tapered fiber with circular birefringence as a gain medium for structured light 

      Zalesskaia, Iuliia; Lei, Yuhao; Kazansky, Peter G.; Wondraczek, Katrin; Gumenyuk, Regina; Filippov, Valery (15.01.2024)
      article
      Amplifying radially and azimuthally polarized beams is a significant challenge due to the instability of the complex beam shape and polarization in inhomogeneous environment. In this Letter, we demonstrated experimentally ...

    • Effect of ZnO Addition and of Alpha Particle Irradiation on Various Properties of Er3+, Yb3+ Doped Phosphate Glasses 

      Poudel, Arun; Dmitrieva, Iuliia; Gumenyuk, Regina; Mihai, Laura; Sporea, Dan; Muresan, Ofelia; Rusen, Ion; Hakkarainen, Teemu; Boetti, Nadia G.; Niemi, Tapio; Petit, Laeticia (10 / 2017)
      article
      <p>New Er3+, Yb3+ codoped phosphate glasses with the (98-x) (0.50P(2)O(5)-0.40SrO-0.10Na(2)O) -0.5Er(2)O(3)-1.5Yb(2)O(3)-xZnO (in mol %) composition were prepared by melting process with up to 10 mol % of ZnO. The ...

    • Full-emission-spectrum employment of Tm-doped fiber laser for noise-like pulse operation 

      Liu, Xinyang; Gumenyuk, Regina
      Proceedings of SPIE - The International Society for Optical Engineering (2024)
      conference
      <p>In this work, the full emission spectrum of Tm-doped fiber (1700 nm – 2000 nm) is employed for tunable noise-like pulse operation. By using an acousto-optic tunable filter (AOTF), the operation wavelength can be ...

    • High power picosecond MOPA with anisotropic ytterbium-doped tapered double-clad fiber 

      Fedotov, Andrei; Noronen, Teppo; Rissanen, Joona; Gumenyuk, Regina; Petrov, Andrey; Chamorovskii, Yuri; Golant, Konstantin; Odnoblyudov, Maxim; Filippov, Valery
      Proceedings of SPIE (2018)
      conference
      <p>Generation of ultrashort pulses with high average power and moderately high pulse energy generally requires a mode-locked laser followed by several fiber amplifiers in a master-oscillator power-amplifier configuration. ...

    • High power ultranarrow linewidth picosecond laser system based on tapered fiber amplifier and gain-switched DFB laser diode 

      Petrov, Andrey; Mikhailovsky, Grigory; Gorbatchev, Alexander; Odnoblyudov, Maxim; Rissanen, Joona; Filippov, Valery; Gumenyuk, Regina (2022)
      article
      <p>We experimentally demonstrate the highest spectral brightness for the pulsed fiber lasers to the best of our knowledge in a compact high power and pulse energy laser system consisting of a DFB laser diode as a ...

    • High-power and pulse energy picosecond narrow linewidth laser system based on tapered fiber amplifier for second harmonic generation 

      Petrov, Andrey; Mikhailovsky, Grigory; Gorbatchev, Alexander; Odnoblyudov, Maxim; Kozlyakov, Mikhail; Rissanen, Joona; Gumenyuk, Regina; Filippov, Valery
      Proceedings of SPIE - The International Society for Optical Engineering (2021)
      conference
      <p>We present the results of compact and cost-efficient high-power and energy laser system based on a picosecond gain-switched DFB laser diode operating at a wavelength of 1064 nm with spectral linewidth less than ...

    • Infiltrated bunch of solitons in Bi-doped frequency-shifted feedback fibre laser operated at 1450 nm 

      Rissanen, Joona; Korobko, Dmitry A.; Zolotovsky, Igor O.; Melkumov, Mikhail; Khopin, Vladimir F.; Gumenyuk, Regina (10.03.2017)
      article
      <p>Mode-locked fibre laser as a dissipative system is characterized by rich forms of soliton interaction, which take place via internal energy exchange through noisy background in the presence of dispersion and ...

    • Large mode area double-clad ytterbium-doped spun tapered fiber 

      Fedotov, Andrei; Ustimchik, Vasilii; Rissanen, Joona; Noronen, Teppo; Gumenyuk, Regina; Kolosovskii, Alexander; Voloshin, Victor; Vorob'ev, Igor; Chamorovskii, Yuri; Filippov, Valery (2021)
      article
      <p>We performed a comparative study of Yb-doped double-clad large mode area (MFDD31 _m) spun tapered fibers with different pitch lengths. A novel type of spun tapered fibers with constant pitch lengths of 7.5, 15, ...

    • Large mode area double-clad ytterbium-doped tapered fiber with low birefringence 

      Fedotov, Andrei; Ustimchik, Vasilii; Rissanen, Joona; Noronen, Teppo; Gumenyuk, Regina; Chamorovskii, Yuri; Kolosovskii, Alexander; Voloshin, Victor; Vorob'Ev, Igor; Filippov, Valery
      Proceedings of SPIE - The International Society for Optical Engineering (2021)
      conference
      <p>We developed ytterbium-doped double-clad large mode area (MFD = 30 µm) spun tapered fibers with low internal birefringence and perfect beam quality (M2 < 1.2). Picosecond MOPA system (95ps/100 MHz, 1064 nm) ...