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01203 am a22001573u 4500 |
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|a Shen, D.Y.
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|a Clarkson, W.A.
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|a Cooper, L.J.
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|a Williams, R.B.
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|a Efficient single-axial-mode operation of a Ho:YAG ring laser pumped by a Tm-doped silica fiber laser
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|c 2004.
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|z Get fulltext
|u https://eprints.soton.ac.uk/16074/1/2990.pdf
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|a Efficient single-frequency operation of a Ho:YAG ring laser at room temperature with a traveling-wave TeO<sub>2</sub> acousto-optic modulator to enforce unidirectional operation is reported. By use of a 2-at.% Ho<sup>3+</sup>-doped 10-mm-long Ho:YAG rod, end pumped by a cladding-pumped tunable Tm-doped silica fiber operating at 1.9 µm, the Ho:YAG ring laser yielded 3.7 W of single-frequency output at 2.1 µm in a diffraction-limited TEM_00 beam with M2 < 1.1 for an incident pump power of 8.8 W. The rf power required for unidirectional operation was 0.3 W and corresponded to an increase in cavity loss for the lasing direction (due to diffraction) of only 0.5%. The prospects for further improvement in efficiency are discussed.
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