Title :
An All-Fiber Coupled Multicolor Microspherical Light Source
Author :
O´Shea, Danny G. ; Ward, Jonathan M. ; Shortt, Brian J. ; Chormaic, Síle Nic
Author_Institution :
Cork Inst. of Technol., Cork
Abstract :
We present results on the realization of an all-taper coupled, multicolor microspherical light source fabricated from the erbium-doped fluoride glass ZBLALiP. Whispering gallery mode lasing at 1555 nm and fluorescent emissions from the ultraviolet to the infrared (IR) have been observed. A tapered fiber is used to launch 980-nm pump light into the microresonator cavity and to collect the resulting IR lasing. A separate, half-taper fiber is used to outcouple the upconversion spectrum over several hundred nanometers. A number of discrete emissions from 400 to 850 nm have been observed in the upconversion spectrum, indicating the suitability of this scheme as a miniature device with a 450-nm-wide band and reasonable output coupling efficiency.
Keywords :
aluminium compounds; barium compounds; erbium; fluoride glasses; lanthanum compounds; laser modes; light sources; microcavity lasers; optical glass; solid lasers; whispering gallery modes; zirconium compounds; IR lasing; ZrF4-BaF2-LaF3-AlF3-LiP:Er; all fiber coupled multicolor microspherical light source; erbium-doped fluoride glass ZBLALiP; fluorescent emissions; half taper fiber; microresonator cavity; pump light; upconversion spectrum; wavelength 1555 nm; wavelength 400 nm to 850 nm; wavelength 980 nm; whispering gallery mode lasing; Fluorescence; Glass; Light sources; Microcavities; Optical coupling; Optical fiber devices; Optical resonators; Optical scattering; Optical waveguides; Whispering gallery modes; Erbium-doped fluoride glass; microsphere resonator; upconversion processes; whispering gallery modes (WGMs);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2007.906111
