Characteristics and Laser Performance of Yb3+-Doped Silica Large Mode Area Fibers Prepared by Sol–Gel Method

Fibers

Shikai Wang¹  Fengguang Lou¹  Meng Wang¹  Chunlei Yu¹  Suya Feng¹  Qinling Zhou¹  Danping Chen¹ 

[1] Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China; E-Mails:

关键词: fiber laser;    sol–gel method;    Yb³⁺-doped silica glass;    LMA DCF;    LMA PCF;   

DOI  :  10.3390/fib1030093

来源: mdpi

【 摘 要 】

Large-size 0.1 Yb₂O₃–1.0 Al₂O₃–98.9 SiO₂ (mol%) core glass was prepared by the sol–gel method. Its optical properties were evaluated. Both large mode area double cladding fiber (LMA DCF) with core diameter of 48 µm and large mode area photonic crystal fiber (LMA PCF) with core diameter of 90 µm were prepared from this core glass. Transmission loss at 1200 nm is 0.41 dB/m. Refractive index fluctuation is less than 2 × 10⁻⁴. Pumped by 976 nm laser diode LD pigtailed with silica fiber (NA 0.22), the slope efficiency of 54% and “light-to-light” conversion efficiency of 51% were realized in large mode area double cladding fiber, and 81 W laser power with a slope efficiency of 70.8% was achieved in the corresponding large mode area photonic crystal fiber.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.