You need to compute effective refractive index profile of a straight PCF, which can be modified into equivalent refractive index profile by conformal mapping technique and finally transfer matrix method may be used to calculate bending losses for different bending radius.
You need to compute effective refractive index profile of a straight PCF, which can be modified into equivalent refractive index profile by conformal mapping technique and finally transfer matrix method may be used to calculate bending losses for different bending radius.
I agree with Pranabendu till conformal mapping part...conformal mapping gives you equivalent profile in bent condition...then as COMSOL is based on FEM, you need to place PML boundary conditions and solve for complex effective refractive index of the interested mode..as we all know the imaginary part of effective refractive index is used to calculate the bend loss
Do you know how to caculate the confinement loss of PCFs? If you know that, you just need to set the equivalent refractive index profile of a bend fiber based on the fomualr: n(x,y)=n*(1+x/Rbend) in COMSOL. And then, the bend loss can be gotten. But you must apply FEM boundary condition on the PCF to got the imaginary part of the effetive refractive index.
- Badges
- Science topic