OPTICAL DEVICE HAVING SECOND ARRAYED WAVEGUIDE GRATING FOR TEMPERATURE CONTROL

摘要

An optical device for multiplexing/demultiplexing optical wavelength signals comprises arrayed waveguide grating devices. To one thereof an optical signal, e.g. one of the optical wavelength signals or an optical signal from a reference source, is input so that its corresponding output signal can be used as a temperature control signal for a temperature control means of the waveguide device. Thus optimization for one optical wavelength signal automatically leads to optimization of all other optical wavelength signals.