Wavelength selective switch

A wavelength selective switch, comprising an optical fiber array, an optical signal processing device, and an output selection device;

• wherein
• the optical fiber array comprises multiple dual-core optical fibers arranged in parallel, any one of the dual-core optical fibers being used for inputting two optical signals;
• the optical signal processing device is located at an output end of the optical fiber array, and is used for dispersing each of the two optical signals into sub-signals with different wavelengths, and projecting the sub-signals with different wavelengths to one of two different spectral band regions in the output selection device, forming two spectral band regions which do not interfere with each other in the output selection device;
• and
• the output selection device is located at a rear end of the optical signal processing device, and is used for processing the sub-signals projected to the spectral band regions, so as to respectively perform output selection on the sub-signals dispersed from the two optical signals, thereby achieving a dual-switch function.