AWG coupler for separating electromagnetic radiation with different wavelength zones, uses free radiation zone for controlling radiation entering and leaving the coupler

摘要

An arrayed waveguide grating (AWG-) coupler for spectral separation of electromagnetic radiation, has a one-two-N transmission range/zone (16) for coupling and decoupling of electromagnetic radiation. The one-two-N transmission zone (16) is specifically a free radiation zone : An independent claim is given for a telecommunications system comprising an AWG-coupler.