# Curved Fiber Couplers¶

The most common curved grating coupler is picazzo3.fibcoup.curved.cell.FiberCouplerCurvedGrating . FiberCouplerCurvedGrating is a boxed, confocal grating where the distance of the first grating line to the focal point and the number of grating lines can be set. The following illustration illustrate the parameters. The socket is always of FiberCouplerCurvedGrating.

For more general gratings you will have to use FiberCouplerCurvedGratingGeneric where each grating line can be separately controlled.

 FiberCouplerCurvedGrating Class for the definition of periodic curved fiber grating couplers with a focal point that fit in a box. FiberCouplerCurvedGratingGeneric Class allowing the creating of generic fiber curved grating coupler.