Title :
Low-Threshold Microlaser in Er : Yb Phosphate Glass Coated Microsphere
Author :
Dong, Chun-Hua ; Xiao, Yun-Feng ; Han, Zheng-Fu ; Guo, Guang-Can ; Jiang, Xiaoshun ; Tong, Limin ; Gu, Chun ; Ming, Hai
Author_Institution :
Univ. of Sci. & Technol. of China, Hefei
fDate :
3/1/2008 12:00:00 AM
Abstract :
We developed a new method to fabricate a silica microsphere coated by a thin layer of Er : Yb-doped phosphate glass. The coated microsphere possessed high-Q whispering-gallery modes and formed single-mode and multimode microlasers in the both 1550- and 1040-nm bands. A low-loss fiber taper was used to not only launch the pump power around 980 nm into the microsphere, but also collect the resulting laser emissions. In our experiment, the threshold pump power as low as 30 muW of a single longitudinal mode was obtained.
Keywords :
erbium; laser modes; micro-optics; optical fibre losses; optical glass; optical pumping; phosphate glasses; solid lasers; whispering gallery modes; ytterbium; P2O5-Er2O3-Yb2O3; high-Q whispering-gallery modes; laser emissions; low-loss fiber taper; low-threshold microlaser; multimode microlasers; phosphate glass coated microsphere; pump power; silica microsphere; single-mode microlasers; threshold pump power; wavelength 1040 nm; wavelength 1550 nm; Erbium; Fiber lasers; Glass; Laboratories; Laser modes; Luminescence; Optical bistability; Optical pumping; Silicon compounds; Whispering gallery modes; Microlaser; microsphere; whispering gallery mode (WGM);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2007.915642
