Monolithic diffraction-limited 976-nm laser based on saddle-shaped photo darkening-free Yb-doped fiber

Svetlana S. Aleshkina; Denis S. Lipatov; Andrei E. Levchenko; Oleg I. Medvedkov; Konstantin K. Bobkov; Mikhail M. Bubnov; Alexei N. Guryanov; Mikhail E. Likhachev

doi:10.1117/12.2289918

26 February 2018 Monolithic diffraction-limited 976-nm laser based on saddle-shaped photo darkening-free Yb-doped fiber

Svetlana S. Aleshkina, Denis S. Lipatov, Andrei E. Levchenko, Oleg I. Medvedkov, Konstantin K. Bobkov, Mikhail M. Bubnov, Alexei N. Guryanov, Mikhail E. Likhachev

Author Affiliations +

Proceedings Volume 10512, Fiber Lasers XV: Technology and Systems; 105121R (2018) https://doi.org/10.1117/12.2289918
Event: SPIE LASE, 2018, San Francisco, California, United States

Abstract

Monolithic 976 nm laser design based on a newly developed saddle-shaped Yb-doped fiber has been proposed. The fiber has central single-mode part with core diameter of about 12 μm and ultra-thin square-shaped clad with side of about 42x42 μm. At the both ends of the saddle-shaped fiber the core and the clad sizes were adiabatically increased up to 20/(70x70) μm and the fiber could be spliced with standard (80..125 μm clad) passive fibers using commercially available equipment. Single-mode laser at 976 nm based on the developed fiber has been fabricated and photodarkening-free operation with output power of 10.6 W, which is the record high for all-fiber laser schemes, has been demonstrated.

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Svetlana S. Aleshkina, Denis S. Lipatov, Andrei E. Levchenko, Oleg I. Medvedkov, Konstantin K. Bobkov, Mikhail M. Bubnov, Alexei N. Guryanov, and Mikhail E. Likhachev "Monolithic diffraction-limited 976-nm laser based on saddle-shaped photo darkening-free Yb-doped fiber", Proc. SPIE 10512, Fiber Lasers XV: Technology and Systems, 105121R (26 February 2018); https://doi.org/10.1117/12.2289918

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