Optical component with multimode interference coupler, has mirror layer to allow MMI coupler to be operated in reflection mode

摘要

At least one MMI coupler (2) is provided with a reflection device (5) so that the MMI coupler can be operated in a reflection mode. An incoming light wave is at least partially reflected from the reflection device after passing through the MMI coupler, and the reflected component passes through the MMI coupler again, in a direction opposite to the original direction of propagation. The reflection device is preferably a mirror layer or multilayer mirror.