grating coupler的意思|示意

Grating couplers are widely used for coupling light into or out of optical fibers in optical communication systems. They are formed by scoring a waveguide path in a substrate and placing a grating on top. An input light beam is focused onto the grating which diffracts it into several output beams. That is why this type of tool or device is known as a grating coupler.

Grating couplers are widely used in many fields. In optical communication systems, for example, they are often placed at the end of the optical fiber to allow for the transmission of signals from the optical fiber to the device. Coupling devices, such as the grating coupler, are also used in other optical systems, such as optical sensors and spectroscopic applications. In addition, they are also used in laser sources, as they are capable of efficiently coupling light into narrow optical fibers.

Grating couplers are also advantageous when compared to other coupling devices since they are efficient, low-cost, and reliable. Furthermore, they are easily fabricated and are able to couple light into fibers with very small core diameters.

In conclusion, grating couplers are essential devices for coupling light into or out of optical fibers, and they are often used in optical communications, optical sensors, spectroscopy, and laser sources. They are efficient, reliable and low-cost, and can couple light into fibers with small core diameters.