多年来,气冷离子激光器是可获得输出功率达数十毫瓦的最主要的实用可见光源。它在电子复印、流动血细胞计数及DNA排序这些应用中发挥重要作用。然而最近它面临挑战,几种固体激光器也可产生相同或更高功率水平的可见光。这一情况致使许多人预言气冷离子激光器即将被淘汰,或至少 Over the years, air-cooled ion lasers are the most important practical visible light sources for output powers up to tens of milliwatts. It plays an important role in such applications as electronic copying, flow cytometry and DNA sequencing. However, it has recently faced the challenge that several solid-state lasers can produce visible light at the same or higher power levels. This situation has led many to predict that air-cooled ion lasers will soon be eliminated, or at least