Chinese Optics Letters, Vol. 16, Issue 8, 080601 (2018)
Large-mode-area neodymium-doped all-solid double-cladding silicate photonic bandgap fiber with an index step of ∼0.5%
Meng Li1,2, Longfei Wang1,*, Shuai Han1,2, Chunlei Yu1, Danping Chen1,**, Wei Chen1, and Lili Hu1
- 1Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
- 2University of Chinese Academy of Sciences, Beijing 100049, China
A large-mode-area neodymium-doped silicate photonic bandgap fiber was theoretically designed and experimentally demonstrated. The relative index step between the high-index rods and the background glass was ∼0.5%, which is the lowest cladding index difference reported on rare-earth-doped all-solid photonic bandgap fibers to our knowledge. An output power of 3.6 W with a slope efficiency of 31% was obtained for a 100-cm-long fiber.