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Stable 1318 nm emission from compact Nd:YAG/V:YAG Q-switched laser

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F21%3A00352561" target="_blank" >RIV/68407700:21340/21:00352561 - isvavai.cz</a>

  • Result on the web

    <a href="https://doi.org/10.1117/12.2589144" target="_blank" >https://doi.org/10.1117/12.2589144</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1117/12.2589144" target="_blank" >10.1117/12.2589144</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Stable 1318 nm emission from compact Nd:YAG/V:YAG Q-switched laser

  • Original language description

    A compact Q-switched laser head emitting radiation at wavelength 1318 nm was designed and constructed. This laser was based on a separate Nd:YAG gain part and V:YAG saturable absorber. The dielectric mirrors of the laser resonator were directly deposited on the Nd:YAG crystal (pumping mirror highly reflecting at 1318 nm radiation; highly transparent for 808 nm and 1064 nm) and on the V:YAG crystal (output coupler with reflection 90 % at 1318 nm; highly transparent at 1064 nm). To decrease the influence of thermal effects and to reduce the residual unabsorbed pumping radiation, a 16 mm long low doped (0.85 at.% Nd/Y) Nd:YAG crystal was used. Similarly, the saturable absorber was based on V:YAG with low absorption coefficient (~0.2 cm-1), corresponding to an 8 mm long V:YAG crystal (initial transmission 85% at 1.3 μm). For longitudinal Nd:YAG pumping, a fibre coupled (core diameter 400 μm; NA = 0.22; wavelength 808 nm, Pmax = 16W) laser diode was used. The pumping diode was operated in a pulsed regime with a repetition rate from 10 to 1000 Hz. The pumping pulse length was set to generate just one generated Q-switched pulse (420 μs for 10 Hz, 220 μs for 1 kHz). In the whole range of tested frequencies, the laser generated stable ~15 ns long (FWHM) pulses with energy up to 160 μJ and peak power ~10 kW. The output beam with TEM00 cross-section was linearly polarized (degree of polarization < 99%). The relative deviation of pulse duration, pulse energy, and pulse peak power at a fixed pumping repetition rate was lower than 1 %. The change of these parameters for the maximum change of pumping repetition rate was not greater than 20%.

  • Czech name

  • Czech description

Classification

  • Type

    D - Article in proceedings

  • CEP classification

  • OECD FORD branch

    20201 - Electrical and electronic engineering

Result continuities

  • Project

    <a href="/en/project/FW01010219" target="_blank" >FW01010219: Multicomponent single crystal materials for solid state lasers</a><br>

  • Continuities

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Others

  • Publication year

    2021

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Article name in the collection

    Proc. SPIE 11777, High Power Lasers and Applications

  • ISBN

    978-1-5106-4388-8

  • ISSN

    0277-786X

  • e-ISSN

    1996-756X

  • Number of pages

    9

  • Pages from-to

  • Publisher name

    SPIE

  • Place of publication

    Bellingham (stát Washington)

  • Event location

    Praha

  • Event date

    Apr 19, 2021

  • Type of event by nationality

    WRD - Celosvětová akce

  • UT code for WoS article

    000697703200012