Physics – Optics
Scientific paper
2010-08-19
Optics Letters, Vol. 35, Issue 24, pp. 4124-4126 (2010)
Physics
Optics
Scientific paper
The beam quality factor M^2 for the fundamental LP01 mode of a step-index fiber is calculated in the presence of gain, in a closed form, as a function of the complex generalized V-number. It is shown that the M^2 value of a single-mode gain-guided fiber laser can be arbitrary large. The results are important for the interpretation of the beam quality measurements in recent experiments on single-mode gain-guided fiber lasers.
Gundu Krishna Mohan
Mafi Arash
Yarandi Parisa Gandomkar
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