Four-wave mixing was observed in the activemedium of a copper vapor laser.
在铜蒸气激光器的激活介质中观察到四波混频现象。
2
From the comparison of the fiber lengths, the pump power and the gain flatness for same gain of FRA, that DCF have been chosen as the activemedium of LRA.
比较在相同增益时的泵浦功率、光纤长度和增益平坦性，从而选择色散补偿光纤作为LRA的增益介质。
3
This article has shown that it is necessary to distinguish the eikonal function, effective optical path and geometrical length etc. of activemedium while investigating optical resonators.