In thispaper,ultraviolet(UV)absorption spectrum,UVphotoinduced refractive-index changes and themethods to improve photosensitivity of optical fiberare discussed. The origin of photoinduced refractive-index change is explained roughly.

• 本文讨论了掺锗光纤的紫外吸收谱、紫外光激折射率变化以及提高光纤光敏性的方法，粗略地解释了光激折射率变化的原因。