TY - GEN AU - Broer,M M AU - Krol,D M AU - Digiovanni,D J TI - Highly nonlinear near-resonant photodarkening in a thulium-doped aluminosilicate glass fiber SN - 0146-9592 PY - 2012///1002 N1 - Publication Type: Journal Article UR - https://doi.org/10.1364/ol.18.000799 ER -