Phosphate glasses are known to produce high gain for the Er3+ emission into 1540nm, especially when sensitized with Yb. Unfortunately, the phosphate glass matrix tends to be weaker than other available amorphous materials. Unlike crystalline materials, glass chemical structure around the active ion can be optimized for both material strength and laser output. Reported here is the result from a design of experiment that was completed in order to strengthen the glass structure of a commercially available phosphate laser glass without impacting its laser output efficiencies. Laser output performance results for the glass that met the targeted thermal and mechanical limits are presented. This effort concludes with a scalable material that is ultimately released to the commercial market.
Simi George, Simi George,
"High performance ErYb:Glass for eye-safe lasers", Proc. SPIE 9726, Solid State Lasers XXV: Technology and Devices, 97261Q (16 March 2016); doi: 10.1117/12.2213110; https://doi.org/10.1117/12.2213110