Loading...
Effect of Tm3+ concentration on the emission wavelength shift in Tm3+-doped silica microsphere lasers
Date
2018
Abstract
In this work, a Tm3+-doped solgel silica microsphere lasing at 2.0 mu m is reported. Microspheres with different Tm3+ concentrations are fabricated by overlaying different Tm3+ concentration solgel solutions on the surface of a pure silica microsphere resonator and then annealing the sample with a CO2 laser. Based on a traditional fiber taper-microsphere coupling method, single and multimode microsphere lasing in the wavelength range 1.8-2.0 mu m is observed if an 808 nm laser diode is used as a pump source. A relatively low threshold pumping power of 1.2 mW is achieved using this arrangement. This solgel method allows for an easy varying of the Tm3+ doping concentration. The observed laser output shifts to longer wavelengths when the Tm3+ doping concentration increases. This has been explained by the larger Tm absorption at shorter wavelengths. The ability to fabricate solgel co-doped silica glass microlasers represents a new generation of low threshold and compact infrared laser sources for use as miniaturized photonic components for a wide range of applications, including gas sensing and medical surgery. (c) 2018 Optical Society of America.
Supervisor
Description
peer-reviewed
Publisher
Optical Society of America
Citation
Optics Letters;43, pp. 4325-4328
Collections
Files
Loading...
Lewis_2020_Effect.pdf
Adobe PDF, 1007.18 KB
Keywords
ULRR Identifiers
Funding code
Funding Information
National Natural Science Foundation of China, Natural Science Foundation of Heilongjiang, Harbin Engineering University