Solar-pumped Er,Tm,Ho:YAG laser

Direct solar illumination was used to pump a 5-mm-diameter 62-mm exposed-length rod of Er,Tm,Ho:YAG to achieve a quasi-cw lasing of the Ho ion at an average power of 12 W. The solar radiation was chopped at a 20% duty cycle to avoid overloading of the cooling system. The peak power output was more t...

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Veröffentlicht in:	Optics letters 1990, Vol.15 (1), p.36-38
Hauptverfasser:	BENMAIR, R. M. J, KAGAN, J, KALISKY, Y, NOTER, Y, ORON, M, SHIMONY, Y, YOGEV, A
Format:	Artikel
Sprache:	eng
Schlagworte:	426002 - Engineering- Lasers & Masers- (1990-) ALLOYS ALUMINIUM COMPOUNDS Doped-insulator lasers and other solid state lasers EFFICIENCY ENGINEERING ERBIUM ADDITIONS ERBIUM ALLOYS Exact sciences and technology Fundamental areas of phenomenology (including applications) GARNETS HOLMIUM ADDITIONS HOLMIUM ALLOYS LASERS LOW TEMPERATURE MINERALS OPERATION Optics OXYGEN COMPOUNDS Physics POWER RANGE POWER RANGE 10-100 W PUMPING RADIATIONS RARE EARTH ADDITIONS RARE EARTH ALLOYS SILICATES SILICON COMPOUNDS SOLAR RADIATION SOLID STATE LASERS STELLAR RADIATION THULIUM ADDITIONS THULIUM ALLOYS TRANSITION ELEMENT COMPOUNDS WATT POWER RANGE YTTRIUM COMPOUNDS
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Beschreibung
Zusammenfassung:	Direct solar illumination was used to pump a 5-mm-diameter 62-mm exposed-length rod of Er,Tm,Ho:YAG to achieve a quasi-cw lasing of the Ho ion at an average power of 12 W. The solar radiation was chopped at a 20% duty cycle to avoid overloading of the cooling system. The peak power output was more than 65 W during the chopper's open times. The slope efficiency is 3.8%, and the threshold input energy is approximately 100 W. The laser was operated for long times (up to hours) while maintaining its performance. This is, to our knowledge, the first directly solar-pumped laser operating at 77 K.
ISSN:	0146-9592 1539-4794
DOI:	10.1364/OL.15.000036