Abstract
Sensitizer-free holmium-doped silica and fluoride mid-infrared fiber lasers are pumped using a high-power diode laser operating at . A maximum output power of at was produced at a slope efficiency of 24% using , -doped fluoride fiber. Using -doped silica fiber, a maximum output power of at was generated at a slope efficiency of 27%, a value limited by the presence of pump excited state absorption.
© 2007 Optical Society of America
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