Patent ID: 6701042
Filing Date: 2004-03-02
Classification: G02B,H04J

Abstract:
An arrayed waveguide grating (AWG) module, comprising:an input waveguide for receiving a wavelength division multiplexed (WDM) optical signal via an optical signal transmission medium; a first star coupler for splitting power of the WDM optical signal received by the input waveguide to obtain split optical signals, and for transmitting the split optical signals; an AWG unit having waveguides for receiving the split optical signals, and for processing the split optical signals so that the split optical signals have phase differences which are proportional to a difference between lengths of the waveguides of the AWG unit, said AWG unit producing processed optical signals; a second star coupler for focusing the processed optical signals at different locations by causing mutual interference between the processed optical signals; and an optical power measurer directly connected to the second star coupler for generating electrical signals depending on power values of the processed optical signals focused by the second star coupler; wherein said optical power measurer comprises one of a photodiode array and a charge-coupled device.