• 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 ...
    • 1.9 micron Tm3+-doped germanate fiber laser source for Si-processing 

      Dvoyrin, Vladislav; Sorokina, Irina T; Okhotnikov, Oleg; Mashinsky, Valery M.; Ischakova, Lyudmila D.; Dianov, Evgenii M; Khopin, Vladimir F.; Guryanov, Aleksey N. (Chapter, 2011)
      We report development of a novel Tm3+ -doped fiber laser source at 1.86 μm based on highly nonlinear 55GeO2-45SiO2 dispersion shifted fiber, applicable to 3D-volume microprocessing of Si.
    • 2.4 μm dual-comb spectroscopy 

      Bernhardt, B; Sorokin, Evgeni; Jacquet, P; Thon, R; Becker, T; Sorokina, Irina T; Hansch, TW; Picque, Nathalie (Chapter, 2010)
      A proof-of-principle experiment of mid-infrared frequency comb Fourier transform spectroscopy is carried out with two interfering Cr2+:ZnSe femtosecond oscillators, emitting around 2400 nm. Spectra of acetylene are measured ...
    • 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.
    • 5 W Supercontinuum Generation at 1.9-2.5 μm from a Tm-Doped All-Fiber MOPA Laser 

      Dvoyrin, Vladislav; Sorokina, Irina T (Chapter, 2013)
      We report a simple method of generating flat-top high power (5W) supercontinuum from an all-silica-fiber Tm-MOPA laser emitting in the interesting for applications 1.96-2.48 μm range (at -5 dB level), covering transparency ...
    • 6.8 W all-fiber supercontinuum source at 1.9-2.5 um 

      Dvoyrin, Vladislav; Sorokina, Irina T (Journal article; Peer reviewed, 2014)
      We report a simple method of generating a spectrally flat and high average power spectral density (up to 14 mW/nm) optical supercontinuum in the 1.95–2.5 μm range covering a transparency window of the atmosphere. 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-Fiber Optical Supercontinuum Source at 1.7-2.9 μm 

      Dvoyrin, Vladislav; Sorokina, Irina T (Chapter, 2013)
      We report supercontinuum generation in the range of 1.7-2.9 μm at up to 3.08 W of output power from a Tm-doped pulsed fiber laser emitting between 1.9-2.5 μm, spliced with a nonlinear fluoride or germanate fiber.
    • All-fiber optical supercontinuum sources in 1.7-3.2 μm range 

      Dvoyrin, Vladislav; Sorokina, Irina T (Journal article; Peer reviewed, 2014)
      We report supercontinuum generation in the 1.7-2.9 μm range with up to 3.08 W of output power and in the range of 1.93-3.18 μm with up to 3.8 W of output power from all-fiber MOPA pulsed systems with Tm-doped fiber mode-locked ...
    • 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.
    • 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 ...
    • Chirped dissipative soliton absorption spectroscopy 

      Kalashnikov, Vladimir L; Sorokin, Evgeni; Sorokina, Irina T (Journal article; Peer reviewed, 2011)
      We present analytical theory of dissipative soliton absorption spectroscopy. A dissipative soliton formed in an all-normal-dispersion oscillator with a narrowband intracavity absorber acquires spectral features that follow ...
    • Clad-Pumped YDFLs Operating in the 1150-1200 nm Range 

      Dvoyrin, Vladislav; Medvedkov, OI; Sorokina, Irina T (Chapter, 2012)
      We demonstrate clad-pumped YDFLs operating at the 1147, 1160 and 1180 nm wavelengths at 35, 21 and 10.5 W of output power, respectively; operation at 1200 nm was realized for the first time.
    • 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