Blar i NTNU Open på forfatter "Klimentov, Dmitry"

Viser treff 1-20 av 20

    • 3W Raman Soliton Tunable between 2-2.2 µm in Tm-Doped Fiber MOPA 

      Dvoyrin, Vladislav; Klimentov, Dmitry; Sorokina, Irina T (Chapter, 2013)
      The simple and compact Tm-doped fiber MOPA generates tunable between 2-2.2 µm Raman solitons with average power up to 3W. Pulses as short as 130 fs and energy up to 38 nJ were demonstrated.

    • 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 ...

    • Broadly tunable high-power continuous-wave Cr2+:CdS laser 

      Sorokin, Evgeni; Klimentov, Dmitry; Sorokina, Irina T; Kozlovskii, V. I.; Korostelin, Yu. V.; Landman, A. I.; Podmar'kov, Y. P.; Skasyrskii, Ya. K.; Frolov, M. P. (Chapter, 2011)
      We report spectroscopic and laser study of Cr2+:CdS laser - an attractive material for 3 µm room-temperature operation. 1.8 W of output power, continuously tunable over 1000 nm from 2240 nm to 3285 nm was demonstrated.

    • 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). ...

    • 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 ...

    • 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 ...

    • Flat-top supercontinuum and tunable femtosecond fiber laser sources at 1.9-2.5 μm 

      Klimentov, Dmitry; Tolstik, Nikolai; Dvoyrin, Vladislav V; Richter, Roland Axel; Sorokina, Irina T (Journal article; Peer reviewed, 2016)
      We report the high-energy flat-top supercontinuum covering the midinfrared wavelength range of 1.9-2.5 μm as well as electronically tunable femtosecond pulses between 1.98 and 2.22 μm directly from the thulium-doped fiber ...

    • High Energy Broadband Femtosecond Pulse Generation From Tm-doped Fiber MOPA 

      Klimentov, Dmitry; Dvoyrin, Vladislav; Tolstik, Nikolai; Sorokina, Irina T (Chapter, 2016)
      We report generation of high energy (up to 280 nJ), broadband (over 450 nm between 1.95 - 2.4 µm), 200 fs pulses at 2.1 W average power directly from a Tm-fiber MOPA laser.

    • Mode-Locked Thulium-Doped Fiber Laser Based on Highly Ge-Doped Fibers 

      Klimentov, Dmitry; Dvoyrin, V; Sorokina, Irina T. (Chapter, 2014)
      We report SESAM mode-locked, linear cavity thulium-doped fiber laser based on a highly Ge-doped active fiber and operating in the anomalous dispersion regime at 1.88 μm, producing 900-fs pulses amplified up to the 3.7-nJ energy.

    • Mode-Locked Tm-Doped Fiber Lasers Based on Highly Ge-Doped Fibers 

      Klimentov, Dmitry; Dvoyrin, Vladislav; Sorokina, Irina T (Chapter, 2015)

    • Multi-Kilowatt Peak Power Nanosecond Er-Doped Fiber Laser 

      Dvoyrin, Vladislav; Klimentov, Dmitry; Klepsvik, JO; Mazaeva, IV; Sorokina, Irina T (Journal article, 2016)
      We report a two-stage diode-pumped Er-doped fiber amplifier operating at the wavelength of 1550 nm at the repetition rate of 10-100 kHz with an average output power of up to 10 W. The first stage comprising Er-doped fiber ...

    • Novel Y2O3-codoped Yb/Tm-doped picosecond fiber laser 

      Dvoyrin, Vladislav; Klimentov, Dmitry; Halder, Arindam; Mukul C, Paul; Mrinmay, Pal; Bhadra, Shyamal K; Kir'yanov, Alexander; Sorokina, Irina T (Journal article; Peer reviewed, 2013)
      We demonstrate the novel picosecond mode-locked Y2O3-codoped Yb/Tm-doped fiber lasers, operating at 1950 nm and producing pulses of up to 1 nJ energy, using a SESAM and an Er-doped pump fiber laser operating at the wavelength ...

    • Raman Soliton Fiber Lasers Tunable Between 1.98 – 2.22 um 

      Klimentov, Dmitry; Dvoyrin, V. V.; Tolstik, Nikolai; Sorokina, Irina T (Chapter, 2016)
      We report two compact diode-pumped mode-locked femtosecond thulium-doped silica-fiber-based MOPAs, operating in the Raman soliton regime with the tunability between 1.98-2.22 μm, including a 75-nJ, 21-MHz fiber laser and ...

    • Spectral Broadening of mid-IR Femtosecond Pulses in Highly Germanium Doped Fiber 

      Tolstik, Nikolai; Klimentov, Dmitry; Dvoyrin, Vladislav; Sorokina, Irina T; Sorokin, Evgeni; Kalashnikov, Vladimir (Chapter, 2012)
      We demonstrate significant spectral broadening of femtosecond mid-IR pulses directly from the oscillator in a simple step-index single-mode highly Ge-doped fiber at only 150 pJ pulse energies in the spectral window around 2.38 µm.

    • Supercontinuum generation in Mid-IR using Chalcogenide and Germanate Nonlinear Fiber 

      Tolstik, Nikolai; Sorokin, Evgeni; Kalashnikov, Vladimir; Klimentov, Dmitry; Dvoyrin, Vladislav; Sorokina, Irina T (Journal article; Peer reviewed, 2013)
      We demonstrate mid-infrared (mid-IR) supercontinuum generation with bandwidth from 2 to 2.8 μm at 20 dB below the peak in nonlinear step-index chalcogenide fiber using femtosecond mid-IR pulses directly from the oscillator. ...

    • Ultra-short pulsed Tm- and Er-doped all-fiber MOPA lasers and supercontinuum sources. 

      Klimentov, Dmitry (Doctoral thesis, 2016-12-12)
      The present work describes the results of the development of a family of novel diode-pumped ultra-short and short pulsed Er- and Tm-fiber laser systems in the “eye-safe” near- and mid-Infrared (mid-IR) wavelength range for ...

    • Yb-Tm energy transfer in Y-codoped fibers 

      Klimentov, Dmitry; Sorokina, Irina T; Dvoyrin, Vladislav; Halder, Arindam; paul, mukul; Das, Shyamal; Bhadra, Shyamal; Pal, Mrinmay (Chapter, 2013)
      Experimental investigation of Yb-Tm energy transfer process in Yb/Tm-doped fibers with Y-codoping provided a fairly high energy transfer efficiency of 50 %, making lasers based on these glass fibers attractive for diode-pumping ...