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

Viitteet 1-20 / 36

    • 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; Jollivet, Clemence (SPIE, 2024)
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      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 special ...

    • 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.; Dong, Liang (SPIE, 2020)
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    • 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.; Ferrari, Maurizio; Mackenzie, Jacob I.; Taccheo, Stefano (SPIE, 2020)
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      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), which ...

    • 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; Jauregui-Misas, Cesar; Supradeepa, V. R. (SPIE, 2022)
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      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 similariton ...

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

      Fedotov, Andrei; Pominova, Daria; Orlovskaya, Elena; Orlovskii, Yurii; Niemi, Tapio; Gumenyuk, Regina (S P I E - International Society for Optical Engineering, 01.03.2019)
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    • Coherent beam combining of optical vortices 

      Fathi, Hossein; Närhi, Mikko; Barros, Rafael; Gumenyuk, Regina (15.07.2024)
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      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 ...

    • 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
      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 impact of ...

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

      Liu, Xinyang; Gumenyuk, Regina; Jollivet, Clemence (SPIE, 2024)
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      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 electrically ...

    • 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; Taccheo, S; Mackenzie, JI; Ferrari, M (SPIE-INT SOC OPTICAL ENGINEERING, 2018)
      conferenceObject
      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
      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 master ...

    • 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; Zervas, Michalis N.; Jauregui-Misas, Cesar (SPIE, 2021)
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      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 0.1 nm and ...

    • 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
      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 nonlinearity. ...

    • 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
      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, and 30 mm, ...

    • 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; Zervas, Michalis N.; Jauregui-Misas, Cesar (SPIE, 2021)
      conferenceObject
      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) based on proposed ...

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

      Rissanen, Joona; Fedotov, Andrei; Noronen, Teppo; Gumenyuk, Regina; Chamorovskii, Yuri; Kolosovskii, Alexander; Voloshin, Victor; Vorobev, Igor; Odnoblyudov, Maxim; Filippov, Valery; Carter, Adrian L.; Dong, Liang (SPIE-INT SOC OPTICAL ENGINEERING, 07.03.2019)
      conferenceObject
      We demonstrated, for the first time to our best knowledge, an active tapered double clad fiber with circular birefringence and 35 μm core diameter. The output radiation had perfect beam quality (M2=1.18/1.1) and linearly ...