TE_crossing

ofiber.planar_step.TE_crossing(V, mode)[source]

Return the TE eigenvalue for a planar waveguide mode.

The eigenvalue, xi, satisfies the eigenvalue equation for the specified TE mode in a planar waveguide.

The solution is found numerically using the Brent method. The only tricky bit is setting the proper range to search within.

Parameters:

  • V – the V-parameter for the waveguide

  • mode – the mode

Returns:

the eigenvalue. If no eigenvalue, 0 is returned.