Diode-pumped 200 μm diameter core, gain-guided, index-antiguided single mode fiber laser
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- Sudesh, V., McComb, T., Chen, Y. et al. Appl. Phys. B (2008) 90: 369. doi:10.1007/s00340-008-2947-0
Single mode laser action in a diode-pumped gain-guided, index- antiguided Nd3+-doped phosphate glass fiber having a 200-μm-diameter core is demonstrated. Near-Gaussian beam quality was maintained, even when pumped up to four times the threshold pump power, indicating robust lowest order mode oscillation. Subtle differences associated with the effectiveness of diode pumping gain-guided, index-antiguided fibers are discussed.