D. Gapontsev, N. Platonov, M. Meleshkevich, O. Mishechkin, O. Shkurikhin, S. Agger, P. Varming, and J. H. Povlsen, "20W Single-Frequency Fiber Laser Operating at 1.93 μm,"
in Conference on Lasers and Electro-Optics/Quantum Electronics and Laser Science Conference and Photonic Applications Systems Technologies,
OSA Technical Digest Series (CD)
(Optical Society of America, 2007), paper CFI5.
We have demonstrated a high power Tm-doped fiber laser system operating at 1.93μm. The DFB fiber laser with 20mW output power is amplified in a Tm-doped all-fiber amplifier system to the output power of 20W.