Optical waveguide system comprising a mode coupling grating and a mode discriminating coupler

摘要

The optical waveguide system (100) comprises a mode discriminating coupler (10) and reflective mode coupling means (e.g., 34 and 35). These components can be combined in a variety of ways to perform a variety of functions. Among them are drop multiplex devices (30), add multiplex devices (60), add/drop multiplex devices (70), and power combiners. The device combinations can have low loss as well as high reliability, the latter due to the robust structure of the devices.