Abstract
We describe some special features of frequency doubling in a Ge-doped SiO2 optical fiber. The generation of a multi-frequency visible spectrum in a single short fiber pumped with 1.06 µm radiation is demonstrated. This effect is the result of an interplay between the processes of frequency doubling and third-order nonlinear frequency mixing. Most of the new components coincide with the characteristic stimulated four-wave-mixing spectrum of the fiber, although the power of the internally generated 0.532 µm pump was more than an order of magnitude below the respective thresholds.
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Minkovski, N., Mirtchev, T. & Ivanov, L. Generation of a wide discrete visible spectrum in a frequency-doubling optical fiber. Appl. Phys. B 63, 20–23 (1996). https://doi.org/10.1007/BF01112831
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DOI: https://doi.org/10.1007/BF01112831