Patent ID: 6621067
Filing Date: 2003-09-16
Classification: G02B,H01L

Abstract:
A photodetector device comprising a photosensitive detector (26; 96) formed from a material having a polarization dependent response having maximum (RMAX) and minimum (RMIN) values corresponding to substantially linear states of polarization of light incident thereupon that are orthogonal to each other, and at least one interface (20; 28; 94) through which a light beam for detection passes before being incident upon a detection surface (28) of the detector (12), the light beam traversing said at least one interface with a propagation direction that is not normal to the interface, the arrangement being such that said at least one interface is tilted about an axis substantially parallel to the direction of the linear state of polarization corresponding to said maximum (RMAX) value and by such a tilt angle that polarization dependent transmission introduced by the at least one interface will compensate at least partially for the polarization dependent response of the material of the photosensitive detector (26).