Picosecond deep ultraviolet pulses generated in excess of the 1030 nm fundamental beam

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F19%3A00337347" target="_blank" >RIV/68407700:21340/19:00337347 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1109/CLEOE-EQEC.2019.8872770" target="_blank" >http://dx.doi.org/10.1109/CLEOE-EQEC.2019.8872770</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1109/CLEOE-EQEC.2019.8872770" target="_blank" >10.1109/CLEOE-EQEC.2019.8872770</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Picosecond deep ultraviolet pulses generated in excess of the 1030 nm fundamental beam

Popis výsledku v původním jazyce

Deep ultraviolet radiation of solid-state near-infrared (~1 pm) lasers is often generated as the second harmonic of the frequency doubled beam, i.e. the wavelength of ~260 nm, and as the sum harmonic frequency, the wavelength of ~200 nm. For these processes usually BBO and CLBO crystals are used. The big advantage in the fourth harmonic generation of the BBO crystal is its high nonlinear coefficient (1.69 pm/V), however, its walk-off angle (84.5 mrad) is quite big and limits the exploitable length of the crystal. The nonlinear coefficient of the CLBO crystal is half of that for BBO (0.83 pm/V), but the walk-off is small (28.8 mrad). Unpleasant with the CLBO is its hygroscopicity, which has to be compensated by keeping the crystal at higher temperature, 150 °C recommended. Nevertheless, the elevated temperature is beneficial for lowering the nonlinear absorption which proceeds as two photon absorption. Regarding the nonlinear absorption, both crystals do not differ much. Our study concerns the CLBO crystals as converters into the deep ultraviolet range.

Název v anglickém jazyce

Picosecond deep ultraviolet pulses generated in excess of the 1030 nm fundamental beam

Popis výsledku anglicky

Deep ultraviolet radiation of solid-state near-infrared (~1 pm) lasers is often generated as the second harmonic of the frequency doubled beam, i.e. the wavelength of ~260 nm, and as the sum harmonic frequency, the wavelength of ~200 nm. For these processes usually BBO and CLBO crystals are used. The big advantage in the fourth harmonic generation of the BBO crystal is its high nonlinear coefficient (1.69 pm/V), however, its walk-off angle (84.5 mrad) is quite big and limits the exploitable length of the crystal. The nonlinear coefficient of the CLBO crystal is half of that for BBO (0.83 pm/V), but the walk-off is small (28.8 mrad). Unpleasant with the CLBO is its hygroscopicity, which has to be compensated by keeping the crystal at higher temperature, 150 °C recommended. Nevertheless, the elevated temperature is beneficial for lowering the nonlinear absorption which proceeds as two photon absorption. Regarding the nonlinear absorption, both crystals do not differ much. Our study concerns the CLBO crystals as converters into the deep ultraviolet range.

Druh

O - Ostatní výsledky

CEP obor

—

OECD FORD obor

10306 - Optics (including laser optics and quantum optics)

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2019

Kód důvěrnosti údajů

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