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An All-Fiber Coupled Multicolor Microspherical Light Source

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4 Author(s)
O'Shea, D.G. ; Cork Inst. of Technol., Cork ; Ward, J.M. ; Shortt, B.J. ; Nic Chormaic, S.

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.

Published in:

Photonics Technology Letters, IEEE  (Volume:19 ,  Issue: 21 )