PetermannW_Approx
- ofiber.cylinder_step.PetermannW_Approx(V)[source]
Approximate the Petermann-2 radius for a step-index fiber.
The approximation is valid for single mode fibers (1.5<V<2.5). The result is the ratio of the Petermann-2 radius to the core radius.
D. Hussey and F. Martinez, “Approximate analytical forms for the propagation characteristics of single-mode optical fibres”, Electron. Lett. 21, 1103 (1985).
- Parameters:
V – V-parameter of the fiber [–]
- Returns:
approximate Petermann-2 radius normalized by core radius [–]