Optical device, optical receiver, and optical transceiver
AssigneeFujitsu Optical Components Limited
InventorMasaki SUGIYAMA
Life of this patent
Estimating the term…
Abstract
An optical device includes a first edge coupler that is connected to a polarization multiplexer-demultiplexer and that makes contact with an end face and a second edge coupler that is connected to an optical hybrid circuit and that makes contact with the end face. The optical device includes a first taper portion that directs light from the end face and that is contained in the first edge coupler and a second taper portion that directs light from the end face and that is contained in the second edge coupler. The second taper portion has a structure in which a taper angle of the second taper portion with respect to the end face is smaller than a taper angle of the first taper portion with respect to the end face.
Claims9
An optical device comprising:
- a first edge coupler that is connected to a polarization multiplexer-demultiplexer and that makes contact with an end face;
- a second edge coupler that is connected to an optical hybrid circuit and that makes contact with the end face;
- a first taper portion that directs light from the end face and that is contained in the first edge coupler;
- and
- a second taper portion that directs light from the end face and that is contained in the second edge coupler,
- wherein the second taper portion has a structure in which a taper angle of the second taper portion with respect to the end face is smaller than a taper angle of the first taper portion with respect to the end face.
An optical receiver comprising an optical receiver element that converts signal light that is received into an electric signal, wherein
- the optical receiver element includes
- a first edge coupler that is connected to a polarization multiplexer-demultiplexer and that makes contact with an end face;
- a second edge coupler that is connected to an optical hybrid circuit and that makes contact with the end face;
- a first taper portion that directs light from the end face and that is contained in the first edge coupler;
- and
- a second taper portion that directs light from the end face and that is contained in the second edge coupler, and
- the second taper portion has a structure in which a taper angle of the second taper portion with respect to the end face is smaller than a taper angle of the first taper portion with respect to the end face.
An optical transceiver comprising:
- an optical modulator element that modulates light that is directed according to an electric signal;
- an optical receiver element that converts reception light that is received into an electric signal;
- and
- a signal processor that generates an electric signal to the optical modulator element and that acquires the electric signal from the optical receiver element,
- wherein the optical receiver element includes
- a first edge coupler that is connected to a polarization multiplexer-demultiplexer and that makes contact with an end face;
- a second edge coupler that is connected to an optical hybrid circuit and that makes contact with the end face;
- a first taper portion that directs light from the end face and that is contained in the first edge coupler;
- and
- a second taper portion that directs light from the end face and that is contained in the second edge coupler,
- wherein the second taper portion has a structure in which a taper angle of the second taper portion with respect to the end face is smaller than a taper angle of the first taper portion with respect to the end face.
Dependencies are inferred from the claim text.