Waveguide with reduced higher modes
An apparatus in one example has an integrated optic component having at least a higher order mode energy and a lower order mode energy. The integrated optic component also has a portion with a predetermined configuration such that radiation divergence losses of the higher order mode energy being much larger than radiation divergence losses of the lower order mode energy.
1 . An apparatus comprising:
an integrated optic component having at least a higher order mode energy and a lower order mode energy; and
the integrated optic component having a portion with a predetermined configuration such that radiation divergence losses of the higher order mode energy being much larger than radiation divergence losses of the lower order mode energy.
2 . The apparatus according to claim 1 , wherein the predetermined configuration is an S turn.
3 . The apparatus according to claim 1 , wherein the integrated optic component has at least an input section and left and right output branches, and wherein the predetermined configuration is located in the input section.
4 . The apparatus according to claim 3 , wherein the predetermined configuration is an S turn.
5 . The apparatus according to claim 3 , wherein mode powers in the left and right output branches are substantially the same.
6 . An apparatus comprising:
an integrated optic component having at least a higher order mode energy and a lower order mode energy; and
the integrated optic component having a portion with a predetermined configuration that reduces the higher order mode energy relative to the lower order mode energy.
7 . The apparatus according to claim 6 , wherein the predetermined configuration is an S turn.
8 . The apparatus according to claim 6 , wherein the integrated optic component has at least an input section and left and right output branches, and wherein the predetermined configuration is located in the input section.
9 . The apparatus according to claim 8 , wherein the predetermined configuration is an S turn.
10 . The apparatus according to claim 8 , wherein mode powers in the left and right output branches are substantially the same.
11 . A system comprising:
a fiber optic gyroscope having an integrated optic component with at least a higher mode and a lower mode; and
the integrated optic component having a portion with a predetermined configuration that reduces the higher mode relative to the lower mode.
12 . The system according to claim 11 , wherein the predetermined configuration is an S turn.
13 . The system according to claim 11 , wherein the integrated optic component has at least an input section and left and right output branches, and wherein the predetermined configuration is located in the input section.
14 . The system according to claim 13 , wherein the predetermined configuration is an S turn.
15 . The system according to claim 13 , wherein mode powers in the left and right output branches are substantially the same.
16 . The system according to claim 11 , wherein a junction of the input section and the left and right output branches is located on a longitudinal reference line, wherein the input section has an input port opposed from the junction, and wherein the input port is displaced a predetermined distance from the longitudinal reference line.
17 . The system according to claim 16 , wherein the predetermined configuration is an S turn.
18 . A method comprising:
conducting an optical signal through a predetermined configuration in an integrated optic component;
splitting an optical signal in the integrated optic component having at least a higher mode and a lower mode; and
making radiation divergence losses of the higher mode much larger than those of the lower mode.
19 . The method according to claim 18 , wherein the predetermined configuration is an S turn.
20 . The method according to claim 18 , wherein mode powers of the split optical signals are substantially the same.