active laser medium
 

* 1.Within a laser, the material that emits coherent radiation or exhibits gain as the result of electronic or molecular transitions to a lower energy state or states, from a higher energy state or states to which it had been previously stimulated. Note: Examples of active laser media include certain crystals, gases, glasses, liquids, and semiconductors. Synonym laser medium

English Related Words* absorbing medium

* activated charcoal (activated carbon active carbon)

* active

* active account

* active agent

* active air defense

* active aircraft

* active antenna

* active application

* active area

* active army

* active balance

* active balance of trade

* active ballistic missile defense

* active birth