Dr. Viktorija Tamulienė Profile

Dr. Viktorija Tamulienė

at Vilnius Univ

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Publications (3)

Proceedings Article | 30 May 2022 Presentation

Investigation of optical parametric generator pumped by subnanosecond passively Q-switched micro-laser pulses

Jonas Banys, Justina Savickytė, Ona Balachninaitė, Simona Armalytė, Viktorija Tamulienė, Vygandas Jarutis, Julius Vengelis

Proceedings Volume PC12143, PC121430V (2022) https://doi.org/10.1117/12.2620757

KEYWORDS: Crystals, Q switching, Picosecond phenomena, Tunable lasers, Temporal resolution, Fluorescence spectroscopy, Visible radiation, Spectroscopy, Numerical simulations, Near infrared

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Optical parametric light generation is a unique way to obtain continuously tunable laser radiation in a wide spectral region. Relatively inexpensive and compact subnanosecond (100 ps - 1 ns) optical parametric generators (OPG) with broad wavelength tunability are needed for a variety of applications that do not require the high temporal resolution supplied by expensive and sophisticated ultrashort (<10 ps) laser systems, but nanosecond (>1 ns) time resolution is not sufficient. Such applications are spectroscopy, laser-induced fluorescence, detection of chemical materials, nonlinear microscopy, biochemical research and differential absorption lidar to name a few. Development and the reduced cost of the passively Q-switched micro-laser manufacturing technologies permits them to be used as a high energy pump source for subnanosecond OPGs. Such micro-laser pumped subnanosecond OPGs would allow the implementation of low-cost, compact, continuously tunable laser radiation sources suitable for the aforementioned applications, especially in near-infrared (NIR) and visible (VIS) spectral ranges where the demand is high. To date, no subnanosecond OPGs based on short (up to 2 cm in length) periodically poled (PP) crystals have been demonstrated that could also be continuously tunable over a wide spectral range. Long PP crystals are more expensive, therefore implementation and investigation of such OPGs would be commercially attractive. Here we investigate parametric light generator based on short (up to 2 cm in length) periodically poled lithium niobate (PPLN) crystal pumped by 473 ps pulses from a 1 mJ energy micro-laser. Experimentally measured spatial, temporal and energy characteristics of the generated light from different length PPLN crystals are shown and supplemented by numerical simulations of parametric generation in a nonlinear dispersive medium. This work has received funding from European Regional Development Fund (project No. 01.2.2-LMT-K-718-03-0004) under grant agreement with the Research Council of Lithuania (LMTLT).

Proceedings Article | 30 May 2022 Presentation

Investigation of LBO and BBO subnanosecond optical parametric amplifiers operating in the visible spectrum range

Julius Vengelis, Gabrielė Stanionytė, Eglė Vėjalytė, Viktorija Tamulienė, Vygandas Jarutis

Proceedings Volume PC12143, PC121430S (2022) https://doi.org/10.1117/12.2619759

KEYWORDS: Visible radiation, Optical amplifiers, Nonlinear crystals, Laser damage threshold, Tunable lasers, Temporal resolution, Picosecond phenomena, Photonic crystals, Optical parametric oscillators, Numerical simulations

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SPIE Journal Paper | 3 January 2020

Investigation of laser-induced damage and related multiphoton absorption changes in lithium niobate crystals at high repetition rate femtosecond pump

Ieva Pipinyte, Viktorija Tamuliene, Julius Vengelis, Mantas Sirutavicius, Rimantas Grigonis, Valdas Sirutkaitis

OE, Vol. 59, Issue 01, 016102, (January 2020) https://doi.org/10.1117/12.10.1117/1.OE.59.1.016102

KEYWORDS: Crystals, Absorption, Femtosecond phenomena, Nonlinear crystals, Laser induced damage, Laser crystals, Lithium niobate, Pulsed laser operation, Optical engineering, Magnesium

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