Patent ID: 6690002
Filing Date: 2004-02-10
Classification: G01J,G02B,H01L,H04J

Abstract:
An optical communication monitor module for dividing a wavelength multiplexed light having N channels (N is an integer of 3 or more) through a diffraction grating having a diffraction order of m and a grating period of d and for receiving the divided light through a photodetector array,wherein a pitch pi between i'th and (i+1)'th (i is an integer of 1 to (âˆ’1)) photodetectors in the photodetector array satisfies the following equation: pi=m&Dgr;&lgr;iL/d cos &thgr;o &Dgr;&lgr;i being a wavelength interval between i'th and (i+1)'th channels, L being an optical path length between the diffraction grating and the photodetector array, and &thgr;o being a mean output angle.