Yb:KGW and Yb:KYW Crystals
Yb:KGW and Yb:KYW Crystals
| Yb:KGW/ Yb:KYW |
| 0.5 - 5 atm. % for Yb:KGW
0.5 - 100 atm. % for Yb:KYW |
| b-cut: Nm-axis is parallel to input/ output faces.
Other orientations also available. |
| +/- 10 arcmin |
| +/- 5 arcsec |
| λ/[email protected] |
| < 0.1 mm @ 45 deg |
| 10 - 5 scratch & dig |
Yb:KGW and Yb:KYW crystals are used as lasing materials to generate ultrashort high power pulses. Yb:KGW can be used as ultrashort pulses amplifiers and these crystals are one of the best materials for high power thin disk lasers.
The broad spectral emission band of Yb:KYW allows the tuning of the laser radiation over 1020-1060 nm range and the generation of femtosecond pulses shorter than 70 fs. Enhanced storage capacity, wide absorption spectrum at 980 nm and high absorption of pump radiation in a small crystal region allow an efficient use of diode laser pump.
As compared to YAG or glasses used as hosts for Yb3+, KYW and KGdW have the advantage of a larger absorption cross section than YAG, which decreases the minimum pump intensity necessary to achieve transparency in the quasi-two-level system of ytterbium.
 |
High absorption coefficient @ 980 nm |
|
High stimulated emission cross section |
|
Low laser threshold |
|
Extremely low quantum defect |
|
Broad output at 1020-1060 nm |
|
High slope efficiency with diode pumping (>55%) |
|
High Yb-doping concentration |
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