title: Diode-laser-pumped tunable 896-939.5-nm neodymium-doped fiber laser with 43-mW output power.
abstract: A diode-laser-pumped neodymium-doped fiber laser is presented. For a launched pump power of 85 mW, the fiber laser had a cw output power of 43 mW, which is approximately an order of magnitude greater output power than any previously reported diode-pumped neodymium fiber laser operating on the 4F(3/2)-4I(9/2) transition, which covers the 900-950-nm region. The fiber laser had a threshold power of 10 mW and a slope efficiency of 58% with respect to launched pump power. Tuning with a diffraction grating was obtained from 896 to 937 nm with narrow-band output powers as high as 32 mW. Emission was also obtained at 939.5 nm with use of a fiber Bragg grating as the output reflector.
authors.affiliation: NASA Langley Research Center, Mailstop 473, Hampton, Virginia 23681, USA.
authors.forename: A L
authors.initials: AL
authors.lastname: Cook
authors.forename: H D
authors.initials: HD
authors.lastname: Hendricks