An all-fiber 1.48-μm generator based on a laser-diode-pumped Yb-doped double-clad laser and a cascaded Raman wavelength converter has been developed. Second-order Raman Stokes radiation was generated in a phosphosilicate-fiber resonator formed by two pairs of Bragg gratings. A slope efficiency of the Raman converter of 48% with respect to the power emitted by the double-clad Yb laser has been achieved. We obtained an output power of 1 W at a slope efficiency of 34% with respect to the laser-diode array power, with a total optical-to-optical efficiency of 23%.
© 1999 Optical Society of America
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(140.3480) Lasers and laser optics : Lasers, diode-pumped
(140.3550) Lasers and laser optics : Lasers, Raman
(190.5890) Nonlinear optics : Scattering, stimulated
(350.2770) Other areas of optics : Gratings
V. I. Karpov, E. M. Dianov, V. M. Paramonov, O. I. Medvedkov, M. M. Bubnov, S. L. Semyonov, S. A. Vasiliev, V. N. Protopopov, O. N. Egorova, V. F. Hopin, A. N. Guryanov, M. P. Bachynski, and W. R. L. Clements, "Laser-diode-pumped phosphosilicate-fiber Raman laser with an output power of 1 W at 1.48 μm," Opt. Lett. 24, 887-889 (1999)