US 2006/0139625 A1 · Polarization dependency identification

Abstract

Provided are a method, system, and device for passing a plurality of light beams though an array of waveguides wherein at least one waveguide is coupled to a test structure which exhibits an insertion loss dependent on a known polarization. For each of a plurality of adjacent waveguides of the array including the one waveguide, a first wavelength response associated with a first polarization, and a second wavelength response associated with a second polarization, may be measured. The first polarization may be identified as the known polarization if the peak value of the first wavelength response of the test structure is less than the peak value of the second wavelength response of said first test structure. Conversely, the second polarization may be identified as the known polarization if the peak value of the second wavelength response of the test structure is less than the peak value of the first wavelength response of the test structure. In one embodiment, unknown polarizations in the polarization response of an optical component having multiple correlated outputs may be identified. Other embodiments are described and claimed.

Claims32

Dependent claims

A method, comprising:

passing a plurality of light beams though an array of waveguides wherein at least one waveguide is coupled to a first test structure which exhibits an insertion loss dependent on a known polarization;
measuring for at least one of a first plurality of adjacent waveguides of said array including said one waveguide, a first wavelength response associated with a first polarization, and a second wavelength response associated with a second polarization;
identifying said first polarization as said known polarization if the peak value of said first wavelength response of said first test structure is less than the peak value of said second wavelength response of said first test structure;
and
identifying said second polarization as said known polarization if the peak value of said second wavelength response of said first test structure is less than the peak value of said first wavelength response of said first test structure.

2 more elements

A device, comprising:

a first test structure which exhibits an insertion loss dependent on a known polarization;
and
an array of waveguides wherein at least one waveguide is coupled to said first test structure, wherein said array includes a first plurality of adjacent waveguides of said array including said one waveguide, at least one waveguide of said first plurality having a first wavelength response associated with a first polarization, and a second wavelength response associated with a second polarization, and wherein said first polarization is said known polarization if the peak value of said first wavelength response of said first test structure is less than the peak value of said second wavelength response of said first test structure;
and said second polarization is said known polarization if the peak value of said second wavelength response of said first test structure is less than the peak value of said first wavelength response of said first test structure.

1 more element

A system, comprising:

a device having a first test structure which exhibits an insertion loss dependent on a known polarization;
and an array of waveguides wherein at least one waveguide is coupled to said first test structure, wherein said array includes a first plurality of adjacent waveguides of said array including said one waveguide;
apparatus coupled to said device and adapted to:
pass a plurality of light beams though said array of waveguides;
measure for at least one of a first plurality of adjacent waveguides of said array including said one waveguide, a first wavelength response associated with a first polarization, and a second wavelength response associated with a second polarization;
identify said first polarization as said known polarization if the peak value of said first wavelength response of said first test structure is less than the peak value of said second wavelength response of said first test structure;
and
identify said second polarization as said known polarization if the peak value of said second wavelength response of said first test structure is less than the peak value of said first wavelength response of said first test structure.

5 more elements

A system for use with a fiber optic cable, comprising:

a multiplexer adapted to be optically coupled to a fiber optic cable;
and
a demultiplexer adapted to be optically coupled to a fiber optic cable;
wherein at least one of said multiplexer and demultiplexer include a first test structure which exhibits an insertion loss dependent on a known polarization;
and an array of waveguides wherein at least one waveguide is coupled to said first test structure, wherein said array includes a first plurality of adjacent waveguides of said array including said one waveguide, at least one waveguide of said first plurality having a first wavelength response associated with a first polarization, and a second wavelength response associated with a second polarization, and wherein said first polarization is said known polarization if the peak value of said first wavelength response of said first test structure is less than the peak value of said second wavelength response of said first test structure;
and said second polarization is said known polarization if the peak value of said second wavelength response of said first test structure is less than the peak value of said first wavelength response of said first test structure.

3 more elements

Dependencies are inferred from the claim text.

Polarization dependency identification

Life of this patent

Polarization dependency identification

Life of this patent

Abstract

Claims32