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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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%.

Název v anglickém jazyce

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

Popis výsledku anglicky

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%.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20201 - Electrical and electronic engineering

Projekt

<a href="/cs/project/FW01010219" target="_blank" >FW01010219: Multikomponentní monokrystalické materiály pro laserové aplikace</a><br>

Návaznosti

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

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proc. SPIE 11777, High Power Lasers and Applications

ISBN

978-1-5106-4388-8

ISSN

0277-786X

e-ISSN

1996-756X

Počet stran výsledku

9

Strana od-do

—

Název nakladatele

SPIE

Místo vydání

Bellingham (stát Washington)

Místo konání akce

Praha

Datum konání akce

19. 4. 2021

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000697703200012