Abstract
An efficient laser in-band pumped by a cladding-pumped Tm-doped silica fiber laser operating at is reported. At low-cavity output coupling, the laser yielded of output at a wavelength of for of absorbed pump power with a slope efficiency of 70%. At high-cavity output coupling, the lasing wavelength shifted to and the laser produced an output power of with a slope efficiency of 76%. The beam propagation factor was measured to be at the maximum output power confirming fundamental transverse mode operation. The influence of resonator design on laser performance is discussed, along with prospects for further power scaling and improvement of the laser efficiency.
© 2010 Optical Society of America
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