gain medium的用法和样例：
例句
- Temperature profile in the gain medium is obtained.An interferogram of the gain medium is described.
结果表明片状固体增益介质热容方式工作对振荡光束波前畸变影响很小。 - The hybrid gain medium can also increase the lasing bandwidth compared with a pure EDF laser, and improve the power conversion efficiency compared with a pure fiber Raman laser.
与纯掺铒光纤激光器相比，该混合增益介质同样能够增加激光带宽，而与纯光纤拉曼激光器相比，该混合增益介质也能够改善激光器的功率转化效率。
