Logical Couplers

The logical waveguide couplers allow the transfer of light from one waveguide port to another. The couplers are only implemented at a logical level (circuit model) without any layout implementation. They can be used for circuit design and serve as the basis for actual implementations such as directional couplers.

`Coupler2x1`	A logical 2x1 reciprocal waveguide coupler.
`Coupler1x2`	A logical 1x2 reciprocal waveguide coupler.
`Coupler2x2`	A logical 2x2 reciprocal waveguide coupler.

Model Parameters

The 2x2 logical coupler model parameters can be individually set:

Note that the model does not enforce passivity.