Multi-stage optical isolator

Details Multi-stage optical isolator Multi-stage optical isolator

2006-08-01

2010-10-12

Lavarias, Arnel (Department: 2872)

Optical: systems and elements

Polarization without modulation

By relatively adjustable superimposed or in series polarizers

C372S703000, C385S011000, C398S065000

Reexamination Certificate

active

07813040

ABSTRACT:
A double stage isolator is formed of 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. A half waveplate is used in addition to beam splitter combiners and non-reciprocal rotators means that rotate the light by 90 degrees so as 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.

REFERENCES:
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patent: 2007/0177264 (2007-08-01), Konno et al.
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patent: WO 2005083495 (2005-09-01), None
GB0711507.4 Search Report, UK Patent Office, Oct. 15, 2007.

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