H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 10/02 (2006.01) G02B 27/10 (2006.01) G02B 27/22 (2006.01) H04B 10/04 (2006.01) H04B 10/18 (2006.01)
Patent
CA 2586683
A double stage isolator is disclosed formed of a face-to-face slabs or sheets of materials that will suitably split, combine, non-reciprocally rotate to ensure isolation in a reverse direction from output ports to respective input ports of any light launched into the input ports. A right angled Porro-prism is disposed at an end of the affixed together slabs having planar faces to direct light launched in a folded fashion to the output ports. This isolator is suitable to be used in planar lightwave circuits (PLCs) and other waveguide applications as the input and output ports are on a same end of the isolator and lie along a same line in a linear array. A half waveplate is used in addition to beam splitter combiners and non--reciprocal rotators means that rotate the light by 90 degrees. This half waveplate is disposed to pass a single beam in a forward propagating direction and to interchange the polarization of two sub-beams that pass through from an output port to an input port in a reverse direction.
Colbourne Paul
Wills Gonzalo
Jds Uniphase Corporation
Teitelbaum & Maclean
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