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A mid-infrared $
m ZnGeP_2$ optical parametric oscillator pumped by a $
m Tm^3 +$-doped fiber laser is reported, providing pulse energies of $230 \;\unicodex00B5
m J$, pulse widths of 40 ns, and peak powers of $\sim6\;
m kW $ with excellent efficiency and beam quality. The pump source is an actively $Q$-switched single oscillator optimized to generate high pulse energies.We report, to the best of our knowledge, the first demonstration of integrated electro-optic (EO) phase shifters based on racetrack microresonators on a 3C silicon-