Laser construction

A laser is constructed from three principal parts:
- An energy source (usually referred to as the pump or pump source),
- A gain medium or laser medium, and
- Two or more mirrors that form an optical resonator.
英汉网英语在线翻译词典收录了3779314条英语词汇在线翻译词条,基本涵盖了全部常用英语词汇的中英文双语翻译及用法,是英语学习的有利工具。