With the rapid development of science and technology, optical fiber technology has become the core pillar of modern communication, data acquisition and precision measurement. As a key component in optical fiber technology, optical fiber collimator is playing an irreplaceable role in many fields with its unique functions and excellent performance.

Fiber optic ring coupler, also known as fiber optic ring resonator, is a device that allows the transfer of light from one fiber optic cable to another in a circular path. It typically consists of a ring-shaped loop of optical fiber that is coupled to an input and output fiber. When a light signal is input into the loop, it circulates around the loop and is coupled to the output fiber.

It is a nonreciprocal device that directs an optical signal from one port to the next, in only one direction at a time. ut ports. This is done by making Port 1 an input-only port, Port 2 and Port 3 input and output ports, and Port 4 an output-only port.