Title :
A Kilowatt All-Fiber Cascaded Amplifier
Author :
Zhihe Huang ; Jianqiu Cao ; Yingye An ; Shaofeng Guo ; Zhiyong Pan ; Jingyong Leng ; Jinbao Chen ; Xiaojun Xu
Author_Institution :
Coll. of Optoelectron. Sci. & Eng., Nat. Univ. of Defense Technol., Changsha, China
Abstract :
A kilowatt all-fiber cascaded amplifier is demonstrated with a distributed side-coupled cladding-pumped Yb-doped fiber for the first time, to the best of our knowledge. Two-stage cascaded amplification is realized in the amplifier, with a total output power of 1.009 kW and an optical-to-optical efficiency of 76.8% with respect to launched pump power. The output beam quality of the cascaded amplifier is also measured, and the M2 factor is ~2.1. The results illuminate that the cascaded amplifier should be beneficial to the power scalability of fiber laser systems.
Keywords :
Q-factor; laser beams; optical fibre amplifiers; optical fibre cladding; optical pumping; ytterbium; M2 factor; distributed side-coupled cladding-pumped Yb-doped fiber; efficiency 76.8 percent; fiber laser systems; kilowatt all-fiber cascaded amplifier; launched pump power; optical-to-optical efficiency; output beam quality; output power; power 1.009 kW; power scalability; two-stage cascaded amplification; Fiber lasers; Laser beams; Measurement by laser beam; Optical fiber amplifiers; Power amplifiers; Power generation; Fiber lasers; High power amplifiers; Ytterbium doped fiber amplifiers; fiber lasers; high power amplifiers;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2015.2426191
