【摘要】 我们从实验资料的分析中发现,以前的理论不能满意地解释实验结果,尝试通过其他途径进行解释。根据变型Von Karman谱并利用相干长度的新定义推导出归一化信噪比函数的普遍表达式。计算结果指出,考虑外尺度的作用后,大气相干长度与外差探测效率将会增大。实验数据支持了上述理论预测。更多还原

【Abstract】 It is found that previous theories can not describe the experimental results satisfactorily. For explanation of this, another way to consider the problem is taken. On the basis of the modified von Karman spectrum, a normalized general expression of signal-to-noise ratio function is derived by means of a new definition for the coherence length. The calculation shows that atmospheric coherence length and heterodyne detection efficiency will be increased when the effects of turbulent outer scale is takan into account. The experimental data support the theoretic prediction.更多还原