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Multiwavelength diode-cladding-pumped Nd3+-doped germano-aluminosilicate fiber laser

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2 Author(s)
S. D. Jackson ; Opt. Fiber Technol. Centre, Univ. of Sydney, NSW, Australia ; Yahua Li

Simultaneous multiwavelength oscillation at 1060 and 1090 nm has been produced from a free-running Nd3+-doped multicomponent silica fiber laser. As a result of co-doping with both Al2O3 and GeO2, the Nd3+ ions are situated at separate sites relating to either Al3+-rich or Ge4+-rich regions of the germano-aluminosilicate glass. The slope efficiency of the combined ∼1-μm 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 Nd3+ ions that are located at Al3+-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 Nd3+ 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 Nd3+-doped silica fiber laser.

Published in:

IEEE Journal of Quantum Electronics  (Volume:39 ,  Issue: 9 )