How Fiber Couplers Work
Optical fiber coupler is a device for detachable (active) connection between optical fiber and optical fiber. It precisely butts the two end faces of optical fiber, so that the light energy output from the transmitting fiber can be coupled to the receiving fiber to the maximum extent. And make it intervene in the optical link to minimize the impact on the system. For a waveguide fiber coupler, it is generally a component with a Y-shaped branch, and the optical signal input by a fiber can be equally divided by it. When the opening angle of the branch circuit of the coupler increases, the light leaking into the cladding will increase to increase the excess loss, so the opening angle is generally within 30°, so the length of the waveguide fiber coupler cannot be too short.
