时间相干性的进一步精确描述

The More Precise Description of the Time-Coherence

针对光源时间相干性中频谱线宽Δν与相干时间τc的关系(Δν≈τc)的粗略表达,运用牛顿迭代法对两者的关系进行了较精确的推导,并对其误差及范围进行了讨论.结果表明,这一相对精确的描述在计算波长带宽较小的光源的相干长度时,可以较大地提高其精确度.

Based on the approximate descriptions between the frequency-width Δν and coherent τc time about light source time-coherence by using Newton iterative method, the more precise relations is derived between them. The paper also discusses the errors and bounds on the approximate and the precise descriptions. The results agree with the more precise description. The precision is even higher for calculating the light source coherent length, which the width of wavelength is narrow.