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arXiv · 1506.07592

Tunable frequency-up/down conversion in gas-filled hollow-core photonic crystal fibers

Mohammed F. Saleh·Fabio Biancalana
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Abstract

Based on the interplay between photoionization and Raman effect in gas-filled photonic crystal fibers, we propose a new optical device to control frequency-conversion of ultrashort pulses. By tuning the input-pulse energy, the output spectrum can be either down-converted, up-converted, or even frequency-shift compensated. For low input energies, Raman effect is dominant and leads to a redshift that increases linearly during propagation. For larger pulse energies, photoionization starts to take over the frequency conversion process, and induces a strong blueshift. We have found also that the fiber-output pressure can provide an additional degree of freedom to control the spectrum shift.

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Mohammed F. Saleh, Fabio Biancalana. 2015-07-10. Tunable frequency-up/down conversion in gas-filled hollow-core photonic crystal fibers. https://doi.org/10.1364/ol.40.004218

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