diff --git a/tools/plot-tools/abacus_plot/dipole.py b/tools/plot-tools/abacus_plot/dipole.py
index f3f7fc88a76..236e11e792a 100644
--- a/tools/plot-tools/abacus_plot/dipole.py
+++ b/tools/plot-tools/abacus_plot/dipole.py
@@ -113,11 +113,7 @@ def alpha(self,dirc: int):
         efield=self.padding(self.efield_data[dirc])
         dipole_fft = np.fft.fft(dipole)
         efield_fft = np.fft.fft(efield)
-        numerator=dipole_fft*efield_fft.conjugate()
-        denominator=efield_fft*efield_fft.conjugate()
-        #added to avoid zero division
-        denominator=0.01*max(denominator)+denominator
-        alpha = np.abs((numerator/denominator).imag)
+        alpha = np.abs((dipole_fft/efield_fft).imag)
         return alpha
     
     def plot_abs(self, fig: Figure, ax: axes.Axes, directions: list = [0, 1, 2], x_range: list = [], unit: str = 'eV'):