Patent ID: 7346232
Filing Date: 2008-03-18
Classification: G02B

Abstract:
1. A device for polarizing optical signals comprising at least a first optical assembly comprising: a polarization rotator having a polarization axis and arranged so that, from an input optical signal S a first optical coupler of the 1×2 type having one optical input and two optical outputs; a second optical coupler of the 2×1 type having two optical inputs and one optical output; the polarization rotator being arranged between the first output of the first coupler and the first input of the second coupler, the second output of the first coupler being connected to the second input of the second coupler, the rotator being a photonic crystal having a plurality of substantially plane and mutually parallel layers of semiconductor material, the said layers having a series of mutually parallel identical notches which are inclined with respect to the average plane of the layers.