We report on high-power fiber lasers based on index-guiding, all-solid neodymium-doped (Nd-doped) phosphate photonic crystal fiber (PCF) with a hexagonal-shaped inner cladding. The optimum fiber laser with a 36 cm length active fiber, generated up to 7.92 W output power at 1053 nm, which benefited from a high absorption coefficient for pump power due to its noncircular inner cladding. The guiding properties of the all-solid PCF were also investigated. A stable mode with a donut-shaped profile and a power-dependent laser beam quality have been observed experimentally and analyzed.
© 2012 Optical Society of America
Lasers and Laser Optics
Original Manuscript: January 6, 2012
Revised Manuscript: March 26, 2012
Manuscript Accepted: April 26, 2012
Published: June 6, 2012
Guang Zhang, Qinling Zhou, Chunlei Yu, Lili Hu, and Danping Chen, "Neodymium-doped phosphate fiber lasers with an all-solid microstructured inner cladding," Opt. Lett. 37, 2259-2261 (2012)