Author(s)

Yantang Huang, Peijing Zhang, Yu Huang, Changlei Guo

1Physics and Information Engineering College, Fuzhou University, Fuzhou, China 2Department of Electronic Engineering, Institute of Optoelectronic Technology, Xiamen University, Xiamen, China.
Physics and Information Engineering College, Fuzhou University, Fuzhou, China.

We report a readily and cheap method to build taper optical fiber-Er³⁺ doped microsphere platform to investigate upconversion fluorescence emission and down-conversion laser oscillation with low threshold pump power. We demonstrate to dope Er³⁺ into silica microsphere surface by dipping a single-taper optical fiber into a certain concentration of erbium nitrate solution (Er(NO₃)) , then dry it and use the electrical-arc of the optical fiber splicer to melt the tip of taper fiber to form the Er³⁺-doped silica microsphere due to surface tension induced. We also present a HF acid etching setup to fabricate low loss biconical optical taper fibers. We demonstrate the Er³⁺ doped silica microsphere triple photons and dual photons absorption process of up-conversion fluorescence emission and down-conversion laser oscillation spectra by using the optical tapered fiber to couple 976 nm/1534 nm pump light source.

Triple Photons Absorption Process; Er³⁺ Doped Microsphere; Taper Optical Fiber; Micro-Laser

Y. Huang, P. Zhang, Y. Huang and C. Guo, "Triple and Double Photons Absorption Process and Down-Conversion Laser Emitting Investigation of Er-Ion Doped Microsphere," Journal of Modern Physics, Vol. 4 No. 12, 2013, pp. 1622-1626. doi: 10.4236/jmp.2013.412201.