一、序言连续染料激光的迅速发展,使在目前按新方式懈决建立量子频标的问题成为可能。事实上,至今在光学和红外波段,辐射频率的最高稳定性和复现性是用这样的方法达到的,它把气体激光的频率锁到低压气体的原子和分子的非线性吸收谱线的窄而稳定的谐振中心处。但是其中要求增益谱 I. Preface The rapid development of continuous dye laser makes it possible to solve the problem of establishing quantum frequency standard according to the new method at present. In fact, the highest stability and reproducibility of the radiation frequency so far achieved in the optical and infrared bands is achieved by the method of locking the frequency of the gas laser to a narrow, non-linear absorption line of the atoms and molecules of the low-pressure gas The stable resonance center. However, it requires gain spectrum