TUNABLE OPTICAL ADD/DROP MULTIPLEXER

摘要

Optical signal devices, wavelength division multiplexer/demultiplexer optical devices, and methods of employing the same in which the core layer (4) includes a grating and is comprised of a material whose refractive index is tuned (e.g. by a heater (8)) so that the grating reflects a preselected wavelength of light. A single optical signal device can therefore be used to select a variety of wavelengths for segregation.