Paper
12 March 2024 Enhancement of four-wave mixing via stimulated emission in a Yb-doped photonic crystal fiber
Bartosz Krawczyk, Alexandre Kudlinski, Ronan A. Battle, Robert T. Murray, Timothy H. Runcorn
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Abstract
We present a novel photonic Crystal Fiber (PCF), designed for degenerate four-wave mixing (FWM), with a Yb-doped core to amplify the FWM pump light via stimulated emission. Using a 1030 nm Q-switched microchip laser as the FWM pump, the generation of anti-Stokes light at 691 nm was enhanced by using a 976 nm CW laser diode to create a population inversion in the Yb-doped core of the PCF, which amplifies the 1030 nm pulses. For a 1030 nm incident average power of 15 mW (4 kW peak power), the 691 nm anti-Stokes power generated increased from 0 to 1.15 mW when the incident 976 nm power was increased from 0 to 287 mW. FWM was not observed for this 1030 nm input power level in a similar length of a conventional PCF with the same phase-matching properties. Hence, we demonstrate that amplification of the FWM pump pulse through stimulated emission boosts the generated anti-Stokes power, providing a promising route to increasing the pump to anti-Stokes conversion efficiency beyond what is possible with non-rare-earth-doped FWM PCFs.
(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.
Bartosz Krawczyk, Alexandre Kudlinski, Ronan A. Battle, Robert T. Murray, and Timothy H. Runcorn "Enhancement of four-wave mixing via stimulated emission in a Yb-doped photonic crystal fiber", Proc. SPIE 12865, Fiber Lasers XXI: Technology and Systems, 128650P (12 March 2024); https://doi.org/10.1117/12.3001501
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KEYWORDS
Four wave mixing

Photonic crystal fibers

Semiconductor lasers

Photons

Q switched lasers

Structured optical fibers

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