Patent ID: 9521474
Filing Date: 2016-12-13
CPC Classification: G02B,G02F,H04Q

Claim Text:
1. A wavelength selective switch (WSS) apparatus comprising: a plurality of optical fiber ports configured to output light beams at different angles from one another; a wavelength dispersion element configured to disperse the wavelength components of each light beam; a focusing element configured to focus the dispersed wavelength components of the light beams; and a multi-layer reflecting unit configured to reflect the focused light beams to the focusing element, the multi-layer reflecting unit including a multi-layer reflector and a reflection controller operatively connected to the multi-layer reflector, the multi-layer reflector having a main surface for reflecting the light beams on which a plurality of layers are provided, each layer including a plurality of pixels that are individually controllable by the reflection controller, wherein the WSS apparatus is arranged that a predetermined wavelength component of a light beam output from one of the optical fiber ports is reflected by the multi-layer reflector to travel back to the one of the optical fiber ports.