为了获得不同温度下掺铒光纤的吸收截面谱和发射截面谱，理论分析了掺铒光纤损耗系数、吸收截面和发射截面与温度的关系。实验研究了损耗谱，吸收截面和发射截面谱随温度的变化。利用截断法测量掺铒光纤的损耗谱，通过损耗谱得到吸收截面谱，然后利用McCumber 关系算出发射截面谱，研究表明波长小于1536 nm 时，损耗系数随着温度降低而增大，波长大于1536 nm 时损耗系数随着温度的升高而增大。

In order to obtain absorption and emission cross sections spectrum, the relationship between loss coefficient, absorption, emission cross sections and temperature are theoretically analyzed. Spectra for loss, absorption and emission are studied experimentally at various temperatures. The loss spectrum is measured by the cut- back method. The absorption spectrum is attained by the loss spectrum. Then based on absorption spectrum, the emission spectrum via the McCumber relation is received. Experiment shows that the loss coefficient are decreased when the wavelength is less than 1536 nm and increased when the wavelength is larger than 1536 nm as temperature increased.