Narrow-band zero-phonon-line pumped efficient cryogenic Yb:YAG laser

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F15%3A00334718" target="_blank" >RIV/68407700:21340/15:00334718 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Narrow-band zero-phonon-line pumped efficient cryogenic Yb:YAG laser

Popis výsledku v původním jazyce

Development of high energy class lasers has attracted the scientific community in recent years because of their vast scientific and technological applications such as laser-driven inertial fusion energy, laser shock peening for hardening of metals and for laser induced damage threshold measurements. To develop systems of this kind Yb:YAG was used as the active material and cooled to cryogenic temperatures due to the fact that spectroscopic and thermo-optical properties enhance. Many works on cryogenic Yb:YAG lasers are based on 940 nm pumping because of the good match of the pump and absorption bands. Other possibilities to develop such systems are to use zero phonon line pumping (ZPL) at 969 nm. The advantage of ZPL pumping is that the quantum defect is reduced by 3% which significantly reduces the diffraction losses caused by thermally induced phase distortions, as reported which has direct implications of increasing slope efficiency. However, at cryogenic temperature the absorption band-width of Yb:YAG at ZPL narrow down tremendously and one has to keep in mind the band-width of the pump source. Nowadays, volume Bragg grating (VBG) stabilized narrow band-width pump sources are available in the market of our choice it is possible to use these as pump sources. We present here highly efficient continuous-wave laser performance of Yb:YAG laser pumped by VBG stabilized narrow band fiber coupled diode at 969nm.

Název v anglickém jazyce

Narrow-band zero-phonon-line pumped efficient cryogenic Yb:YAG laser

Popis výsledku anglicky

Development of high energy class lasers has attracted the scientific community in recent years because of their vast scientific and technological applications such as laser-driven inertial fusion energy, laser shock peening for hardening of metals and for laser induced damage threshold measurements. To develop systems of this kind Yb:YAG was used as the active material and cooled to cryogenic temperatures due to the fact that spectroscopic and thermo-optical properties enhance. Many works on cryogenic Yb:YAG lasers are based on 940 nm pumping because of the good match of the pump and absorption bands. Other possibilities to develop such systems are to use zero phonon line pumping (ZPL) at 969 nm. The advantage of ZPL pumping is that the quantum defect is reduced by 3% which significantly reduces the diffraction losses caused by thermally induced phase distortions, as reported which has direct implications of increasing slope efficiency. However, at cryogenic temperature the absorption band-width of Yb:YAG at ZPL narrow down tremendously and one has to keep in mind the band-width of the pump source. Nowadays, volume Bragg grating (VBG) stabilized narrow band-width pump sources are available in the market of our choice it is possible to use these as pump sources. We present here highly efficient continuous-wave laser performance of Yb:YAG laser pumped by VBG stabilized narrow band fiber coupled diode at 969nm.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

10306 - Optics (including laser optics and quantum optics)

Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2015

Kód důvěrnosti údajů

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