# Logical Couplers¶

Logical couplers enable the distribution of light from one port to one or more other ports.

Fig. 78 Different types of logical 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:

Fig. 79 Model parameters of the 2x2 logical coupler

Note that the model does not enforce passivity.