Efficient cw sodium dimer Raman laser operation in a high-temperature sapphire cell |
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Authors: | D Sarkisyan U Hinze L Meyer B Wellegehausen |
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Institution: | Institute for Physical Research, Armenian Academy of Sciences, Ashtarak-2, Armenia, AM Institut für Quantenoptik, Universit?t Hannover, Welfengarten 1, D-30167 Hannover, Germany, DE
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Abstract: | cw Raman lasing of Na2 molecules generated in a heated, sealed-off, all-sapphire cell is demonstrated. Being not damaged by highly corrosive alkaline
vapours, this type of cell enables operation without buffer gas in contrast to the normal heatpipe operation of these lasers.
This allows us to study Raman lasers in alkaline vapours in new regimes and under ideal conditions.
With an argon ion pump laser at 488 nm, Raman laser operation at 525 nm with more than 10% efficiency and thresholds below
0.2 mW for a cell without buffer gas (length 9 cm) have been obtained so far. The low thresholds, being a factor of 10 less
than for comparable heatpipe operation, gives us the chance to use low-power diode lasers as pump sources and to realize compact
reliable Raman laser systems.
Received: 17 May 1999 / Published online: 25 August 1999 |
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Keywords: | PACS: 42 55 Ye |
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