TE polarizer based on SOI platform
AssigneeInphi Corporation
InventorsJie Lin, Masaki Kato
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Abstract
The present application discloses a Transverse Electric (TE) polarizer. The TE polarizer includes a semiconductor substrate having an oxide layer. The TE polarizer further includes a waveguide embedded in the oxide layer. Additionally, the TE polarizer includes a plate structure embedded in the oxide layer substantially in parallel to the waveguide with a gap distance. In an embodiment, the plate structure induces an extra transmission loss to a Transverse Magnetic (TM) mode in a light wave traveling through the waveguide.
Claims20
A polarization-sensitive silicon photonics circuit for polarization sensitive optical communication comprising:
- a silicon-on-insulator substrate having a silicon dioxide layer;
- at least one passive component configured to deliver or receive a light wave to or from an active device;
- a Transverse Electric (TE) polarizer coupled to the at least one passive component and/or the active device to make the light wave substantially in a TE mode, each TE polarizer comprising,
- a waveguide embedded in the silicon dioxide layer;
- a plate structure embedded in the silicon dioxide layer substantially in parallel to the waveguide with a gap distance;
- wherein the plate structure induces an extra transmission loss greater than 6 dB to a Transverse Magnetic (TM) mode in the light wave while keeps a low transmission loss smaller than 2 dB to the TE mode in the light wave of a bandwidth >30 nm traveling through the waveguide.
A method for using a Transverse Electric (TE) polarizer comprising:
- providing a silicon-on-insulator substrate having a silicon dioxide layer;
- forming a polarization-sensitive silicon photonics circuit including at least one passive component configured to deliver or receive a light wave to or from an active device;
- providing a TE polarizer to couple with the at least one passive component and/or the active device to make the light wave substantially in a Transverse Electric (TE) mode, the TE polarizer comprising,
- a waveguide embedded in the silicon dioxide layer;
- a plate structure embedded in the silicon dioxide layer substantially in parallel to the waveguide with a gap distance;
- wherein the plate structure induces an extra transmission loss greater than 6 dB to a Transverse Magnetic (TM) mode in the light wave while keeps a low transmission loss smaller than 2 dB to the TE mode in the light wave of a bandwidth over 30 nm traveling through the waveguide.
Dependencies are inferred from the claim text.