论文标题
基于baga4s7
Efficient, sub-4-cycle, 1-μm-pumped optical parametric amplifier at 10 μm based on BaGa4S7
论文作者
论文摘要
我们报告了基于最近开发的宽型袋式原晶晶体Baga4s7（BGS）的μJ规模中红外光学参数放大器（OPA），并将其在同一OPA设置中的LIGAS2（LGS）（LGS）的性能直接比较。该源基于单个OPA阶段的放大超脑种子脉冲，其量子效率为29 {\％}，在10μM的怠速波长下为29 {\％}。由于直接以1μM泵送OPA，总体转换效率远远超过了基于OPA的传统方案，其次是差异频率产生。使用大块锗的CHIRP补偿导致126-FS脉冲覆盖7.6-11.5-μm光谱范围。 BGS由于其在单一晶体大小的尺寸大于LGS而对功率扩展的巨大希望。
We report on a μJ-scale mid-infrared optical parametric amplifier (OPA) based on the recently developed wide-bandgap orthorhombic crystal, BaGa4S7 (BGS), and directly compare its performance to that of LiGaS2 (LGS) in the same OPA setup. The source is based on a single OPA stage amplifying supercontinuum seed pulses with a quantum efficiency of 29{\%} at an idler wavelength of 10 μm, featuring nominally carrier-envelope phase-stable pulses. As a result of pumping the OPA directly at 1 μm, the overall conversion efficiency far exceeds that of traditional schemes based on OPA's followed by difference frequency generation. Chirp compensation using bulk germanium resulted in 126-fs pulses covering the 7.6-11.5-μm spectral range. BGS holds great promise for power scaling due to its availability in larger single-crystal sizes than LGS.
