文中提出等效噪声功率谱密度的概念。

The concept of "equivalent noisy power spectral density" is introduced in this paper.

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通过实验探讨了APD的温度特性，得到了APD的雪崩电压、暗电流、光电流、等效噪声功率与温度的关系。

Experiments were done to probe into the characteristics of APD. The relationships between avalanche voltage, dark current, photocurrent, NEP and temperature were educed separately.

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