The Wavelength Selective Switch (WSS) is the core module of the Reconfigurable Optical Add/Drop Multiplexing (ROADM). The importance of the ROADM device is equivalent to that of the PC. ROADMs require multiple WSS devices depending on the usage scenario and specifications. As one of the most important components of the all-optical network, ROADM can bring flexibility to the optical network, reduce power consumption and cost, and make full use of network idle resources. In the implementation of low-latency transmission and switching, based on The ROADM of WSS technology has become an important technology implementation in the industry.

The optical chip is used to complete photoelectric signal conversion and is a highly integrated device. The optical chip is integrated for a plurality of components, such as a laser device, a modulation device, a coupling device, a beam splitting device, a wavelength division multiplexing device, a detector device, and the like.