Lasing Characteristics of Tm3+:Ho3+ Codoped Silica Fibre Laser Pumped by 1.18-μm Raman Fibre Laser
DONG Shu-Fu1,2, CHEN Guo-Fu1, WANG Xian-Hua1, ZHAO Shang-Hong2
1State Key Laboratory of Transient Optics Technology, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an 710068
2Telecommunication Engineering Institute, Air Force Engineering University, Xi’an 710077
Lasing Characteristics of Tm3+:Ho3+ Codoped Silica Fibre Laser Pumped by 1.18-μm Raman Fibre Laser
1State Key Laboratory of Transient Optics Technology, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an 710068
2Telecommunication Engineering Institute, Air Force Engineering University, Xi’an 710077
Abstract： The fundamental characteristics of Fabry--Perot-cavity continuous-wave Tm--Ho codoped silica fibre lasers pumped by a 1.18 μm Raman fibre laser are presented. A maximum output power of 930 mW at 1880nm is generated for a fibre length of 1 m from the transition of Tm3+, with a slope efficiency of 32.4%. For a 3-m-long fibre, the maximum output power decreases to 650 mW at 1960 nm due to the laser emission from Ho3+ with a lower slope efficiency of 25%, which clearly shows the effective energy transfer from Tm3+ to Ho3+. The wavelength red-shifting of the laser emission originates from the transition competition and the emission cross section difference between Tm3+ and Ho3+.
2004, Vol. 21 
