Multiwavelength diode-cladding-pumped Nd/3+/-doped germano-aluminosilicate fiber laser

• Published in: IEEE journal of quantum electronics Vol. 39; no. 9; pp. 1118 - 1122
• Main Authors: Jackson, S D, Li, Yahua
• Format: Journal Article
• Language: English
• Published: 01.09.2003
• ISSN: 0018-9197
• DOI: 10.1109/JQE.2003.816094

Simultaneous multiwavelength oscillation at 1060 and 1090 nm has been produced from a free-running Nd/3 /-doped multicomponent silica fiber laser. As a result of co-doping with both Al(2)O(3) and GeO(2), the Nd/3 / ions are situated at separate sites relating to either Al/3 /-rich or Ge/4 /-rich regions of the germano-aluminosilicate glass. The slope efficiency of the combined ~1-mum output was ~52% (56%) with respect to the launched (absorbed) pump power. The 1060-nm emission reaches threshold first because of the greater number of Nd/3 / ions that are located at Al/3 /-rich sites. On chopping the pump light the relaxation oscillations relating to the 1090-nm emission are antiphase with the oscillations observed with the 1060-nm emission. A degree of spectral overlap exists between the fluorescence emitted from Nd/3 / ions located at each site. Power equalization (to ~1 W each) of the 1060- and 1090-nm emissions was carried out by way of Raman amplification that occurred either internally or externally to the Nd/3 /-doped silica fiber laser.