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Blue up-conversion Tm3+-doped fiber laser pumped by a multiline Raman source

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2 Author(s)
Talavera, D.V. ; Centro de Investigaciones en Optica A.C. Loma del Bosque 115, C.P. 37150, AP 1-948 Leon, Guanajuato, Mexico ; Mejia, E.B.

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We report laser oscillation at 481 nm when pumping a Tm3+-doped fluorozirconate fiber by two Raman-generated signals at 1117 and 1175 nm. A superior efficiency was achieved when pumping with both lines. For example, the conversion efficiency was 20% when pumping with 83 mW of 1117 nm and reached 33% when copumping with 29 mW of 1175 nm. As higher powers of the copumping signal were applied, a powerful amplified spontaneous emission at ∼790 nm started to compete with 481 nm. The slope efficiency evolved from 16% to 48% when pumping with a simpler, noncontrolled Raman source that provided a single- to multi wavelength evolving spectrum.

Published in:

Journal of Applied Physics  (Volume:97 ,  Issue: 5 )