2000nm three port polarization insensitive ring resonator

A 2000nm three port polarization insensitive optical polarizer allows light to propagate only in one direction. If the signal is input from port 1, it is output from port 2; And if the signal is input from port 2, it will be output from port 3, with very low output loss. When light is input from port 2, there is a significant loss when output from port 1. Similarly, when light is input from port 3, there is also a significant loss when output from ports 1 and 2. Optical circulators are irreversible optical devices.