Browsing NTNU Open by Author "Tolstik, Nikolai"

Now showing items 1-20 of 49

    • 1 Watt femtosecond mid-IR Cr:ZnS laser 

      Sorokin, Evgeni; Tolstik, Nikolai; Sorokina, Irina T (Journal article; Peer reviewed, 2013)
      A room-temperature Kerr-Lens modelocked (KLM) Cr:ZnS laser generates <70 fs pulses duration (about eight optical cycles) with 5.6 nJ pulse energy and over 100 nm FWHM spectral width at 105-157 MHz repetition rates. The ...

    • 8.6 MHz Extended Cavity Cr:ZnS Chirped-pulse Oscillator 

      Tolstik, Nikolai; Lee, Cherrie; Sorokin, Evgeni; Sorokina, Irina T (Chapter, 2018)
      We report the first extended cavity Cr:ZnS chirped-pulse oscillator mode-locked by graphene. We demonstrate 415 mW average power at 8.6 MHz repetition rate which results in 48 nJ pulse energy.

    • All-laser-microprocessed waveguide Cr:ZnS laser 

      Sorokin, Evgeni; Bushunov, Andrey; Tolstik, Nikolai; Teslenko, Andrei; Einmo, Eskil; Tarabrin, Mikhail; Lazarev, Vladimir; Sorokina, Irina T (Peer reviewed; Journal article, 2022)
      We report the proof-of-concept of an operational laser active medium with a depressed cladding waveguide manufactured in the volume of a Cr2+:ZnS single-crystalline sample and antireflection microstructures fabricated on ...

    • Atmospheric dispersion management in mid-IR mode-locked oscillators 

      Sorokin, Evgeni; Rudenkov, Alexander; Tolstik, Nikolai; Kalashnikov, Vladimir; Demesh, Maksim; Sorokina, Irina (Peer reviewed; Journal article, 2023)
      The atmospheric dispersion in the mid-infrared transparency windows presents an important albeit often neglected factor when developing ultrashort-pulsed lasers. We show that it can amount to hundreds of fs2 in 2–3 µm ...

    • Broad-band GVD Measurement of Specialty Fibers in mid-IR 

      Klimentov, Dmitry; Dvoyrin, Vladislav; Tolstik, Nikolai; Sorokina, Irina T (Chapter, 2012)
      We demonstrate a novel interferometeric setup for broad-band (>300nm) GVD measurements in short-length optical fibers in the mid-IR wavelength range using a superluminescent fiber source and investigate specialty fibers ...

    • Broadband Dispersion Measurement of ZBLAN, Germanate and Silica Fibers in MidIR 

      Klimentov, Dmitry; Tolstik, Nikolai; Dvoyrin, Vladislav; Kalashnikov, Valdimir L; Sorokina, Irina T (Journal article, 2012)
      We report the first ultra-broad band dispersion measurements in short-length ZBLAN, germanate and silica-based optical fibers in the near- and midIR wavelength ranges between 1.7 and 2.0 μm and from 2.3 to 2.45 μm, using ...

    • Broadband method for group velocity dispersion measurements in the mid-infrared 

      Klimentov, Dmitry; Tolstik, Nikolai; Dvoyrin, Vladislav; Sorokina, Irina T (Journal article; Peer reviewed, 2011)
      A setup for broadband measurements of dispersion parameter in optical fibers based on the Mach–Zehnder interferometer is developed. Tm-doped fiber pumped at 1.61 μm was used as a source of broadband emission, that allowed ...

    • Ceramic Cr:ZnS laser mode-locked by graphene 

      Tolstik, Nikolai; Sorokin, Evgeni; Sorokina, Irina T (Chapter, 2014)
      We report a high-power graphene mode-locked ceramic Cr:ZnS-laser, producing 3.9 nJ, 140 fs pulses with 45 nm spectral bandwidth at 270 MHz repetition rate, at output power for the first time exceeding 1 W level.

    • Chaotic chirped-pulse oscillators 

      Sorokin, Evgeni; Tolstik, Nikolai; Kalashnikov, Vladimir; Sorokina, Irina T (Journal article; Peer reviewed, 2013)
      We present results of experimental investigation of the chaotic and quasi-periodic regime in the chirped-pulsed (dissipative soliton) Cr:ZnS and Cr:ZnSe mid-IR oscillators with significant third-order dispersion. The ...

    • Chaotic regime in chirped-pulse mid-IR oscillators 

      Sorokin, E.; Tolstik, Nikolai; Kalashnikov, Valdimir L; Sorokina, Irina T (Chapter, 2013)
      We present experimental investigation of the chaotic mode-locking operation regime in two novel chirped-pulsed Cr:ZnS and Cr:ZnSe mid-IR lasers. The long-term stable regime is caused by the nonlinear interaction of dispersive ...

    • 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

    • 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). ...

    • 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 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 % ...

    • 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 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 ...