deletions | additions       diff --git a/section_Theory_subsection_Mach_Zehnder__.tex b/section_Theory_subsection_Mach_Zehnder__.tex  index 43f3832..2be78d6 100644  --- a/section_Theory_subsection_Mach_Zehnder__.tex  +++ b/section_Theory_subsection_Mach_Zehnder__.tex 
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\subsection{Mach-Zehnder Interferometer basic operation}  \begin{center}  $I_{0}=\frac{I_{i}}{4}\left|\exp\left(-j\beta_{1}L_{1}-\frac{\alpha_{1}}{2}L_{1}\right)+\exp\left(-j\beta_{2}L_{2}-\frac{\alpha_{2}}{2}L_{2}\right)\right|^{2}$  \end{center}  \begin{center}  $I_{0}=\frac{I_{i}}{2}\left\{ 1+\cos\left(\beta_{1}L_{1}-\beta_{2}L_{2}\right)\right\} $  \end{center}  \begin{center}  $I_{0}=\frac{I_{i}}{2}\left\{ 1+\cos\left(\Delta\beta L\right)\right\} $  \end{center}  \begin{center}  $I_{0}=\frac{I_{i}}{2}\left\{ 1+\cos\left(\beta\Delta L\right)\right\} $  \end{center}  \subsection{Optical filter using two Mach-Zehnder interferometers} 
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