End-pumping Tm,Ho,Ce:NaY(WO4)2 crystal laser at 2.07 µm and the up-conversion repressed

✍ Scribed by F.G. Yang; F.P. Yan; Z.Y. You; C.Y. Tu; C.L. Sun; Y. Wang; Z.J. Zhu; J.F. Li

• Book ID: 102451672
• Publisher: John Wiley and Sons
• Year: 2010
• Tongue: English
• Weight: 74 KB
• Volume: 7
• Category: Article
• ISSN: 1612-2011
• DOI: 10.1002/lapl.201010082

✦ Synopsis

We presented an infrared laser output at 2.07 μm with Tm,Ho,Ce:NaY(WO4)2 single crystal end-pumped by 795 nm laser diode at room temperature. The crystal was grown by the Czochralski method with the concentrations of 5 at.% Tm 3+ , 1 at.% Ho 3+ , and 30 at.% Ce 3+ . The highest output power was up to 0.2 W corresponding to the pumping power of 50 W and the threshold was about 40 W at 293 K. Especially, the introduction of Ce 3+ brought about a novel phenomenon. End-pumping with the 795 nm LD, we surprisingly found the up-conversion was repressed heavily and the green emission disappeared thoroughly in Tm,Ho,Ce:NaY(WO 4 ) 2 crystal, which was particularly different from the crystal Tm,Ho:NaY(WO4)2, where the green emission was obvious and weakened the sensitized transition energy.

Output power, mW