A MEMS pitch-tunable grating add/drop multiplexers

Summary form only given. A new add/drop multiplexers MEMS device based on polysilicon pitch-tunable gratings is reported and used to in WDM environment in fibre-optic communication systems. The polysilicon pitchtunable gratings are very attractive for implementing WDM switches, as reflection grating is used to disperse incident light into angular directions determined by the incident light's wavelength and the structural parameters of the grating.