US Patent No. 10,461,878

POLARIZATION DIVERSE WAVELENGTH SELECTIVE SWITCH


Patent No. 10,461,878
Issue Date October 29, 2019
Title Polarization Diverse Wavelength Selective Switch
Inventorship Steven James Frisken, Vaucluse (AU)
Assignee Finisar Corporation, Horsham, PA (US)

Claim of US Patent No. 10,461,878

1. A dual-source wavelength selective switch comprising:a) a first source comprising a first plurality of ports and carrying a first group of beams and a second source comprising a second plurality of ports and carrying a second group of beams;
b) a first and second polarizing port selecting module element, the first source transmitting a plurality of beams from the first group of beams to the first polarizing port selecting module element and the second source transmitting a plurality of beams from the second group of beams to the second polarizing port selecting module element, the first and second polarizing port selecting module elements generating a respective first and second output beam that are orthogonally polarized;
c) a first beam confining module coupled to the first and second polarizing port selecting module elements, the first beam confining module confining and realigning the first and second output beam that are orthogonally polarized along a direction of propagation to generate confined and realigned orthogonally polarized beams;
d) a collimating element positioned in the path of the confined and realigned orthogonally polarized beams;
e) a wavelength dispersive element positioned in the path of the confined and realigned orthogonally polarized beams for spatially dispersing individual wavelength channels;
f) a focusing element positioned in the path of the confined and realigned orthogonally polarized beams for focusing the beams;
g) a first polarization beam splitter coupled to the focusing element for separating at least one of the first and second output beams that are orthogonally polarized into first and second orthogonal polarization components; and
h) a processing device positioned in the path of the confined and realigned orthogonally polarized beams that includes a series of independent wavelength processing elements for separately processing each of the spatially dispersed individual wavelength channels thereby steering the spatially dispersed individual wavelength channels along predetermined paths such that the first source is configured to switch an optical beam from one of the first plurality of ports to another one of the first plurality of ports and independently the second source is configured to switch an optical beam from one of the second plurality of ports to another one of the second plurality of ports.