Three forms of absorption loss of fusion spliceradmin
The absorption loss of the fusion splicer is mainly due to the absorption of light energy by the optical fiber and impurities, which absorb the light energy in the form of heat energy in the optical fiber, which is an important loss in the optical fiber loss. The absorption loss includes the following:
1. Dopants and impurity ions. The fiber material contains transition metals such as iron, copper, chromium, etc., which have their own absorption and absorption bands and are different depending on their valence. The fiber loss caused by the transition of metal ions depends on their concentration. In addition, the presence of OH also produces an absorption loss, and the basic absorption peak of OH is around 2.7 μm, and the absorption band is in the range of 0.5 to 1.0 μm. For pure silica fiber, impurity-induced loss can not be considered.
2. Atomic Defect Absorbance Loss of fiber due to heat or intense radiation, it will be excited to produce atomic defects, resulting in the absorption of light, resulting in loss, but in general this effect is very small.
3. Substance intrinsic absorption loss This is due to the inherent absorption of the material caused by the loss. It has two bands, one in the near infrared 8 ~ 12μm area, the band of the intrinsic absorption is due to vibration. Another material inherent absorption zone in the ultraviolet band, absorption is very strong, its tail will be dragged to 0.7 ~ 1.1μm band to go.