Blar i NTNU Open på forfatter "Sorokina, Irina T"

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    • Coherent octave-spanning mid-infrared supercontinuum generated in As2S3-silica double-nanospike waveguide pumped by femtosecond Cr:ZnS laser 

      Xie, Shangran; Tolstik, Nikolai; Travers, J.; Sorokin, Evgeni; Caillaud, Celine; Troles, Johann; Russell, Philip St.J.; Sorokina, Irina T (Journal article; Peer reviewed, 2016)
      A more than 1.5 octave-spanning mid-infrared supercontinuum (1.2 to 3.6 μm) is generated by pumping a As2S3-silica “double-nanospike” waveguide via a femtosecond Cr:ZnS laser at 2.35 μm. The combination of the optimized ...

    • Compact Diode-pumped Dispersion-managed SESAM-mode-locked Ho:fiber Laser 

      Tolstik, Nikolai; Sorokin, Evgeni; bugar, ignac; Sorokina, Irina T (Chapter, 2016)
      We demonstrate for the first time a compact mode-locked holmium fiber laser diode-pumped at 1150 nm. The laser was operated in the dispersion-managed dissipative-soliton regime and provided 3.7 nJ pulse energy at 7.8 MHz PRF

    • Computer Controlled Dispersion Measurements and Investigation of New Optical Fibers 

      Sembito, Alex (Master thesis, 2014)
      A dispersion measurement setup for short length fibers based on Mach Zehnder interferometer was automatized and tested using standard telecommunication fiber. This setup is based on low coherence sources which enable ...

    • Continuous-wave broadly tunable high-power Cr:CdS laser 

      Sorokin, Evgeni; Klimentov, Dmitry; Frolov, MP; Korostelin, Yuri; Kozlovsky, VI; Podmar'kov, Yuri; Skasyrsky, Ya K; Sorokina, Irina T (Journal article; Peer reviewed, 2014)
      We report spectroscopic characteristics and laser properties of the mid-infrared active laser medium Cr2+:CdS. Temperature-dependent absorption, luminescence and lifetime measurements of the 5E exited state allow determination ...

    • Continuum generation in Mid-IR from Tm-doped germanate fiber using femtosecond Cr:ZnS laser 

      Tolstik, Nikolai; Klimentov, Dmitry; Dvoyrin, Vladislav; Sorokina, Irina T; Kalashnikov, Vladimir; Sorokin, Evgeni (Chapter, 2012)
      The mid-IR supercontinuum generation in fibers has received much attention due to its broad applicability to high-resolution spectroscopy and trace gas analysis, frequency metrology and optical coherence tomography (OCT). ...

    • Cr4+: YAG chirped-pulse oscillator 

      Sorokin, Evgeni; Kalashnikov, Valdimir L; Mandon, Julien; Guelachvili, Guy; Picque, Nathalie; Sorokina, Irina T (Journal article; Peer reviewed, 2008)
      We demonstrate chirped-pulse operation of a Cr :YAG passively mode-locked laser. Different operation regimes of the laser are extensively investigated in the vicinity of zero dispersion both experimentally and numerically. ...

    • Cr:ZnSe Bulk and Cr:ZnSe Thin Disk cw Lasers 

      Renz, Guenther; Speiser, Jochen; Giesen, Adolf; Sorokina, Irina T; Sorokin, Evgeni (Chapter, 2012)
      A Thulium-fiber-laser pumped Cr:ZnSe bulk cw laser with an output power of 6.5W as well as a Thulium-fiber-laser or diode-laser-stack pumped Cr:ZnSe thin disk cw laser with almost 2W of output powers will be presented.

    • Cr:ZnSe thin disk cw laser 

      Renz, Guenther; Speiser, Jochen; Giesen, Adolf; Sorokina, Irina T; Sorokin, Evgeni (Journal article; Peer reviewed, 2013)
      A Thulium fiber laser pumped or InP diode laser stack pumped Cr:ZnSe thin disk cw multimode laser at 2.4 µm with an output power of 5 and 4 W, respectively, and with optical-tooptical efficiencies of 10% will be presented. ...

    • Diode-pumped mode-locked Holmium fiber laser at 2.138 um 

      Tolstik, Nikolai; Sorokin, Evgeni; bugar, ignac; Sorokina, Irina T (Chapter, 2017)

    • Dispersion Measurement of Infrared Specialty Fibers 

      Klimentov, Dmitry; Tolstik, Nikolai; Kalashnikov, VL; Dvoyrin, Vladislav; Sorokina, Irina T (Chapter, 2012)
      We demonstrate broadband (>250nm) dispersion measurements and theoretical calculations in a set of short-length specialty fibers in the 2.16-2.41µm wavelength range for femtosecond mid-IR applications using an ultrabroadband ...

    • Doped chalcogenide glasses for luminescence and laser application 

      Chahal, Radwan; Starecki, F.; Boussard-Plédel, C.; Bureau, B.; Nazabal, Virginie; Doualan, J.-L.; Braud, A.; Camy, P.; Tolstik, Nikolai; Sorokina, Irina T (Chapter, 2016)

    • Efficient half-harmonic generation of three-optical-cycle mid-IR frequency comb around 4 µm using OP-GaP 

      Sorokin, Evgeni; Marandi, Alireza; Schunemann, Peter; Fejer, MM; Byer, Robert L.; Sorokina, Irina T (Journal article; Peer reviewed, 2018)
      We report a broadband mid-infrared frequency comb with three-optical-cycle pulse duration centered around 4.2 µm, via half-harmonic generation using orientation-patterned GaP (OP-GaP) with ~43% conversion efficiency. We ...

    • Efficient high-energy Raman soliton generation in a Tm:doped large mode area fiber amplifier 

      Richter, Roland Axel; Tolstik, Nikolai; Sorokina, Irina T (Peer reviewed; Journal article, 2022)
      We report the Tm-doped all-fiber MOPA based on a LMA active fiber generating Raman solitons tunable in the range 1970-2300 nm directly from the LMA fiber. By tuning the chirp of the input pulse we reached more than 90 % ...

    • Emission decay and energy transfer in Yb/Tm Y-codoped fibers based on nano-modified glass 

      Klimentov, Dmitry; Dvoyrin, Vladislav; Halder, Arindam; Paul, Mukul Chandra; Das, Shyamal; Bhadra, Shyamal K; Sorokina, Irina T (Journal article, 2015)
      We report the results of an experimental investigation and theoretical analysis of luminescence decay in Yb/Tm Y-codoped fibers based on nano-modified glass. Based on the experimental results, numerical simulations allowed ...

    • Enhancement and shape control of weak molecular absorption signal with chirped-pulse mid-IR lasers 

      Sorokin, Evgeni; Tolstik, Nikolai; Sorokina, Irina T (Chapter, 2013)
      Detection of weak narrowband absorption by molecular lines is usually a topic of linear-optical technology. In this paper we demonstrate nonlinear-optical enhancement and shape control of atmospheric absortion lines using ...

    • Er,Yb:GdAl3(BO3)4 laser passively Q-switched by MBE-grown Cr:ZnS thin films 

      Gorbachenya, Konstantin N.; Kisel, Victor E.; Yasukevich, Anatoly S.; Tolstik, Nikolai; Karhu, Eric Andrew; Furtula, Vedran; Sorokin, Evgeni; Maltsev, VA; leonyuk, N.; Galinis, A.; Lipinskas, T.; Gibson, Ursula; Sorokina, Irina T; Kuleshov, Nikolai V. (Chapter; Peer reviewed, 2017)

    • Femtosecond Cr2+-based lasers 

      Sorokina, Irina T; Sorokin, Evgeni (Journal article; Peer reviewed, 2015)
      We review a novel class of femtosecond Cr2+-doped ZnSe and ZnS lasers, which operates in a very important for applications wavelength range between 2 and 3.5 μm and which generates ultrashort optical pulses that are only ...

    • Femtosecond Cr:ZnS laser at 2.35 µm mode-locked by carbon nanotubes 

      Tolstik, Nikolai; Okhotnikov, Oleg; Sorokin, Evgeni; Sorokina, Irina T (Journal article; Peer reviewed, 2014)
      We report the solid-state Cr:ZnS laser mode-locked by CNT-based saturable absorber. The absorber was deposited on a protected silver mirror used as a high reflector mirror in a standard 250-MHz cavity with chirped mirror ...

    • Femtosecond laser writing of the depressed cladding buried channel waveguides in ZnS crystal 

      Okhrimchuk, A.; Smayev, M.; Likhov, V.; Sorokin, Evgeni; Tolstik, Nikolai; Sorokina, Irina T (Chapter, 2018)
      We report the first direct laser-writing of buried channel waveguides in ZnS. A depressed cladding waveguide with propagation loss of 0.62 dB/cm at 1030 nm allowed to obtain spectral broadening under femtosecond-pumping ...

    • Femtosecond Operation and Random Quasi-Phase-Matched Self-Doubling of Ceramic Cr:ZnSe Laser 

      Sorokin, Evgeni; Sorokina, Irina T (Chapter, 2010)
      A 100-fs Cr:ZnSe laser, based on a ceramic active medium, generates 100 mW at 215 MHz repetition rate around 2450 nm. Co-propagating second-harmonic pulse at 1225 nm is simultaneously generated due to random quasi-phase-matching ...