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以一台电激励连续波HF化学激光器作为研究平台,根据振荡阈值条件和Rigrod理论,并参考国外泛频HF激光器的腔镜参数,选取了适当的膜层反射率,最后使用镀有波段选择性膜的泛频腔镜进行了实验。光轴取在H2喷注孔下游1 mm处,得到了3.5 W的泛频HF激光,泛频效率为10%,谱线成分为P20(6)和P20(7);60 cm处的光斑尺寸为10 mm×7 mm,激光模式为TEM00。实现泛频输出的同时伴有少量的基频输出,主要是因为镜面膜层质量的限制,而镀膜的技术水平也是目前研究泛频HF激光器的主要难点之一。另外,在泛频出光的重复性实验中仅获得瓦级的基频输出,谱线成分为P2(3)和P2(4),主要原因为腔镜膜层的退化。
Based on the oscillatory threshold condition and Rigrod theory and with reference to the parameters of the endoscopic HF laser, the appropriate reflectance of the film was selected by using an electrically excited continuous wave HF chemical laser as the research platform. Finally, Of the frequency-specter was experiment. The optical axis was taken 1 mm downstream of the H2 injection hole to obtain a 3.5 W pan-frequency HF laser with a pan-frequency efficiency of 10% and spectral components of P20 (6) and P20 (7); spot size at 60 cm Is 10 mm × 7 mm and the laser mode is TEM00. The realization of the pan-frequency output with a small amount of baseband output is mainly due to the limitation of the quality of the mirror layer, and the technical level of the coating is one of the main difficulties in the research of the pan-frequency HF laser. In addition, in the repetitive experiment of panning out light, only the fundamental frequency output of the watt level was obtained. The spectral components were P2 (3) and P2 (4), mainly due to the degradation of the endoscopic coating.