We report for the first time nonlinear frequency conversion—specifically optical parametric oscillation—in OP-GaP layers grown by hydride vapor-phase epitaxy on 3-inch OP-GaAs templates. Continuous tuning with wavelength coverage from 3.9–12 µm was achieved by using stepped and fan-out gratings having periods from 18.0–35.2 µm, which propagated 150 µm of a 1.2-mm-thick layer before overgrowth. Anti-reflection-coated OP-GaP crystals were pumped at 1040 nm with an ultrafast Yb-fiber laser, yielding idler output powers up to 150 mW (60 mW) in spectra centered at a wavelength of 5.6 µm (10.7 µm).

中文翻译：

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基于在GaAs上生长的取向图案GaP的光学参量振荡器，可在3.9–12 µm范围内连续进行波长调谐

我们首次报道了氢化物气相外延在3英寸OP-GaAs模板上生长的OP-GaP层中的非线性频率转换-特别是光学参量振荡。通过使用周期为18.0-35.2 µm的阶梯状扇形光栅，可以连续调谐波长覆盖范围为3.9–12 µm，该光栅在过度生长之前传播了150 µm的1.2 mm厚的层。使用超快Yb光纤激光器将抗反射涂层的OP-GaP晶体泵浦到1040 nm，从而在以5.6 µm（10.7 µm）为中心的光谱中产生高达150 mW（60 mW）的惰轮输出功率。