Up-Conversion and Self-Stimulated Raman Laser in a Codoped Microsphere

Author

Yu Huang ; Peijin Zhang ; Changlei Guo ; Yantang Huang

Author_Institution

Dept. of Phys. & Inf. Eng., Fuzhou Univ., Fuzhou, China

Volume

25

Issue

14

fYear

2013

fDate

15-Jul-13

Firstpage

1385

Lastpage

1388

Abstract

In this letter, Yb³⁺-Eu³⁺ codoped sol-gel films are applied to the surface of silica microspheres. Under the excitation with 976 nm laser, we observe the luminescence of Eu³⁺ with relatively low pump power. The Yb³⁺ → Eu³⁺ energy transfer process and the pump power dependence are studied. Because of high energy density of the Yb³⁺-Eu³⁺ codoped microsphere (YECM), the threshold power for the downconversion (Yb³⁺:²F_5/2 → ²F_7/2) laser is as low as 8.99 μW. In addition, a self-stimulated cascaded Raman laser (SSCRL) is observed, which is stimulated by the down-conversion laser of the YECM.

Keywords

Raman lasers; europium; micro-optics; optical pumping; photoluminescence; silicon compounds; solid lasers; ytterbium; SSCRL; SiO₂:Yb,Eu; codoped microsphere; codoped sol-gel films; down-conversion laser; energy density; energy transfer; laser excitation; luminescence; pump power dependence; self-stimulated cascaded Raman laser; silica microspheres; threshold power; up-conversion Raman laser; wavelength 976 nm; Cooperative energy transfer; SSCRL; YECM; low threshold; optical fiber taper; sol-gel;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2013.2265318

Filename

6522116