Blar i NTNU Open på forfatter "Sorokina, Irina T"
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Femtosecond operation and self‐doubling of Cr:ZnS laser
Sorokin, Evgeni; Sorokina, Irina T; Tolstik, Nikolai (Chapter, 2011)Prismless dispersion‐controlled Cr:ZnS laser generates first femtosecond (110 fs) pulses at 180 MHz repetition rate around 2400 nm with average power 200 mW. Copropagating second‐harmonic pulse at 1200 nm is simultaneously ... -
Femtosecond SESAM-modelocked Cr:ZnS laser
Sorokin, Evgeni; Tolstik, Nikolai; Schaffers, Kathleen I.; Sorokina, Irina T (Journal article; Peer reviewed, 2012)We report self-starting femtosecond operation of a 180-MHz SESAM-controlled prismless Cr:ZnS laser around 2400 nm at open air and room temperature. Dispersion compensation was achieved by a combination of bulk materials ... -
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 ... -
Graphene mode-locked Cr: ZnS chirped-pulse oscillator
Tolstik, Nikolai; Pospischil, Andreas; Sorokin, Evgeni; Sorokina, Irina T (Journal article; Peer reviewed, 2014)We report the first to our knowledge high-energy graphene mode-locked solid-state laser operating in the positive dispersion regime. Pulses with 15.5 nJ energy and 42 nm spectral bandwidth with 0.87 ps duration were obtained ... -
Graphene Mode-locked Cr:ZnS Laser with 41 fs Pulse Duration
Tolstik, Nikolai; Sorokin, Evgeni; Sorokina, Irina T (Journal article; Peer reviewed, 2014)We report the ultrashort-pulse Cr:ZnS laser mode-locked by graphene-based saturable absorber mirror. Using the combination of bulk material and a chirped mirror, we demonstrate the shortest reported so far mid-IR pulses ... -
Graphene mode-locked Cr:ZnS laser with 44 fs pulse duration
Tolstik, Nikolai; Pospischil, Andreas; Sorokin, E.; Sorokina, Irina T (Chapter, 2013)The first Cr:ZnS laser mode-locked by graphene-based saturable absorber mirror generates the shortest reported so far mid-IR pulses of only 5.5 optical cycles (44 fs) at 2.35 μm with 139 nm spectral bandwidth. -
Graphene Saturable Absorber Mirrors for 2-3 μm Lasers
Lee, Cherrie Sue Jing (Master thesis, 2018)This thesis is devoted to the development of graphene saturable absorber mirrors for ultrafast applications in the mid-infrared. It covers from the fabrication of the graphene saturable absorber mirrors via graphene transfer ... -
Graphene-mode-locked Holmium Fiber Laser Operating Beyond 2.1 µm
Dvoyrin, Vladislav; Tolstik, Nikolai; Sorokin, E.; Sorokina, Irina T; Kurkov, A. (Chapter, 2015) -
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. -
High-energy Mid-Infrared Cr:ZnS Chirped-pulse oscillator
Tolstik, Nikolai; Sorokin, Evgeni; Sorokina, Irina T (Chapter; Peer reviewed, 2013)Femtosecond coherent light sources emitting in the mid-infrared are of particular interest for a number of applications like environmental sensing, medicine, metrology, material processing and telecommunications. Among the ... -
Investigation of Raman scattering phenomena in the development of mid-IR ultra-short laser pulses
Richter, Roland Axel (Master thesis, 2015)In this thesis both a raman spectrometer and a dispersion measurement setup for fibers was designed, built and automatized. Furthermore several nonlinear phenomena were researched and with two different approaches simulated. ... -
Kerr-Lens Mode-locked Cr:ZnS Laser
Sorokin, Evgeni; Tolstik, Nikolai; Sorokina, Irina T (Chapter, 2012)The first Kerr-Lens mode-locked Cr:ZnS laser generates the shortest and highest-energy mid-IR near transform-limited pulses of 69 fs duration at 550 mW output power. The 3.7 nJ pulses have 193 nm wide spectrum around 2.39 µm -
Kerr-lens mode-locked Cr:ZnS laser
Tolstik, Nikolai; Sorokin, Evgeni; Sorokina, Irina T (Journal article; Peer reviewed, 2013)We report the soft-aperture Kerr-lens mode-locked Cr:ZnS laser, generating 550 mW of 69 fs nearly transform-limited pulses at 2.39 μm wavelength. The pulse energy reached 3.8 nJ at 145 MHz repetition rate, limited by the ... -
MBE-grown Cr:ZnS Thin Film Laser Media
Tolstik, Nikolai; Sorokin, Evgeni; Karhu, Eric Andrew; Polyakov, Stanislav; Gibson, Ursula; Sorokina, Irina T (Chapter, 2016)We report results of spectroscopic analysis of the first first laser-quality MBE-grown Cr:ZnS films. Comparison of spectral-luminescent properties with bulk Cr:ZnS indicates their good laser properties, opening the way ... -
Mid-infrared dual-comb spectroscopy with 2.4 mu m Cr2+:ZnSe femtosecond lasers
Bernhardt, B; Sorokin, E; Jacquet, P; Thon, R; Becker, T; Sorokina, Irina T; Picque, N; Hansch, TW (Journal article, 2010)The mid-infrared part of the electromagnetic spectrum is the so-called molecular fingerprint region because gases have tell-tale absorption features associated with molecular rovibrations. This region can be for instance ... -
Mid-Infrared Femtosecond Laser
Sorokin, E.; Tolstik, Nikolai; Sorokina, Irina T (Chapter, 2013)Recent breakthroughs in femtosecond lasers operating directly in the mid-infrared wavelength region enabled generation of Watt-level output with ~10-nJ pulses and only 5 optical cycles duration, demonstrating interesting ... -
Mid-IR frequency comb source spanning 4.4-5.4 mu m based on subharmonic GaAs optical parametric oscillator
Vodopyanov, KL; Sorokin, E; Sorokina, Irina T; Schunemann, PG (Journal article, 2011)Broadband mid-IR output suitable for producing 1000-nm-wide frequency combs centered at 4.9 μm was achieved in a degenerate subharmonic optical parametric oscillator (OPO) based on 500-μm-long Brewster-angled orientation-patterned ... -
Mid-IR Ultrafast Laser Technology for Science and Industry
Sorokina, Irina T (Chapter, 2017)The talk reviews fundamentals as well as recent advances in fiber based ultrafast mid-IR lasers and frequency combs, providing a flexible and robust fiber based technology platform to address demanding requirements set by ... -
Mid-IR ultrashort pulsed fiber-based lasers
Sorokina, Irina T; Dvoyrin, Vladislav; Tolstik, Nikolai; Sorokin, Evgeni (Journal article; Peer reviewed, 2014)We review the latest breakthroughs in ultrafast fiber laser technology in the mid-IR wavelength range ≥2 μm. In particular, we concentrate on two novel laser systems built around passively mode-locked Tm:fiber lasers and ... -
Mode-Locked Tm-Doped Fiber Lasers Based on Highly Ge-Doped Fibers
Klimentov, Dmitry; Dvoyrin, Vladislav; Sorokina, Irina T (Chapter, 2015)