Tian, W <br/><br/>
Ultraviolet upconversion in thulium-doped fluorozirconate fiber observed under two-color excitation.  [electronic resource] 

 -  Optics letters  Oct 2001 
 - 1580-2 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0146-9592 
<br/><br/><label>Standard No.: </label>10.1364/ol.26.001580  doi