Watt-level short fiber lasers side-pumped through fiber-to-waveguide couplers are demonstrated. The fiber lasers are fabricated from Nd-doped phosphate glass with large numerical aperture of 0.2 and rectangular cross section of 1.5 x 0.5 (mm). Single transverse mode output is achieved by the gain-guiding effect. Average power of 1 W is generated from a 4.0-cm-long fiber laser with a slope efficiency of 10%.
© 2008 Chinese Optics Letters
(140.3070) Lasers and laser optics : Infrared and far-infrared lasers
(140.3480) Lasers and laser optics : Lasers, diode-pumped
(140.3510) Lasers and laser optics : Lasers, fiber
(140.3530) Lasers and laser optics : Lasers, neodymium
Yulong Tang, Yong Yang, and Jianqiu Xu, "Side-pumped short rectangular Nd-doped phosphate glass fiber lasers," Chin. Opt. Lett. 6, 583-585 (2008)