Browsing NTNU Open by Author "Kalashnikov, Valdimir L"

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    • 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 ...

    • 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 ...

    • 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. ...

    • Soliton delivery of mid-IR femtosecond pulses with ZBLAN fiber 

      Tolstik, Nikolai; Sorokin, Evgeni; Kalashnikov, Valdimir L; Sorokina, Irina T (Journal article; Peer reviewed, 2012)
      We demonstrate environmentally protected delivery of highpower femtosecond mid-IR pulses in a single-mode ZBLAN fiber by soliton formation. A 70-fs Cr:ZnS laser at 2.4 µm reaches this regime already at ~2 nJ launched pulse ...

    • Tm3+-doped CW fiber laser based on a highly GeO2-doped dispersion-shifted fiber 

      Dvoyrin, Vladislav; Sorokina, Irina T; Mashinsky, Valery M.; Ischakova, Lyudmila D.; Dianov, Evgenii M; Kalashnikov, Valdimir L; Yashkov, Mikhail V.; Khopin, Vladimir F.; Guryanov, Aleksey N. (Journal article; Peer reviewed, 2011)
      A novel all-fiber laser based on a highly GeO2-doped dispersion-shifted Tm-codoped fiber, pumped at 1.56 µm wavelength and lasing at 1.862 µm wavelength with a slope efficiency up to 37% was demonstrated. The single-mode ...