New high power rare-earth-doped fiber laser materials and architectures

摘要

Kigre is developing new rare-earth-doped glass fiber laser materials specifically for use in multiple clad and multiple core LMA (Large Mode Area) and super mode (guided wave) fiber laser constructs. In this work we describe new end-pump double clad fiber laser designs fabricated from high performance phosphate laser glass compositions. One DC (Double Clad) LMA fiber is doped with erbium/ytterbium for 1.54um laser emission. Another DC LMA fiber is doped with ytterbium for 1.03um laser emission. A third DC multiple core "supermode" fiber is doped with neodymium for 1.053um laser emission. Initial fiber laser performance data is presented. The erbium/ytterbium & ytterbium only doped fibers are end-pumped at 940/975nm with 40-Watt fiber coupled laser diodes. The neodymium-doped fiber is end-pumped with an 808nm 40-Watt fiber coupled laser diodes. Design and performance data for new side-pumped, highly doped phosphate DC LMA fiber laser architectures are presented.