Hi I am trying to simulate a single mode fiber for edge coupler. In the application library, I saw that for the edge coupler SMF-28 has been used and the MODE Field diameter was calculated to be found as 10.4 µm.
I am trying to simulate an SMF-400 fiber. For that, I am using a core radius of 1.3 µm. My question is there any direct relation between Mode Field Diameter and Core radius of an optical Fiber?