All-spliced 11.3 W four-wave mixing fiber source at 760 nm

There are limited fiber-based single-mode laser sources with wavelength emissions in the visible and near infrared range. Nonlinear conversion through four-wave mixing in photonic crystal fibers allows for the generation of new wavelengths far from a pump wavelength. Utilizing an all-fiber spliced configuration, we convert 1064 nm light into a W-level signal in the 750 nm – 820 nm spectral region. Out of our custom photonic crystal fiber, we demonstrate 11.3 watts in the signal band, with M² ⪅ 1.15, at an optical-optical conversion efficiency of 37.2%.