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Article Abstract
Wave mixing (WM) techniques are crucial for applications such as supercontinuum generation, frequency conversion, and high-dimensional quantum encoding. However, their efficiency is often limited by complex phase-matching requirements, and current insights into phase-matching mechanisms for high-order WM remain limited. To address this, compact optical path configurations with high-peak-power, synchronous, multicolor ultrafast laser sources are needed to enhance high-order wave-mixing efficiency. This study presents a quad-wavelength synchronously mode-locked bulk laser using a Fabry-Perot structured (FPS) crystal. By employing a Yb:SYB/Yb:CNGS FPS crystal, we achieved quad-wavelength synchronous mode-locking operation at 1042.6, 1044.7, 1046.9, and 1049.1 nm in a single-cavity without additional wavelength selection elements. The FPS crystal serves as both the gain medium and a spectral filter, simplifying the laser system. The mode-locked FPS crystal lasers offer new possibilities for developing multi-wavelength light sources.
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