# US 9,520,944 B2 · Optical communication device

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- Number: US 9,520,944 B2
- Document ID: US9520944B2
- Status: Granted
- Kind: B2
- Application number: 14/736,857
- Filed: 2015-06-11
- Published: 2016-05-19
- Granted: 2016-12-13
- Earliest claimed: 2014-11-17
- Assignees: Hon Hai Precision Industry Co., Ltd.
- Applicants: Hon Hai Precision Industry Co., Ltd.
- Inventors: Hsin-Shun Huang
- Web page: https://patentgrep.com/patent/US9520944B2

## CPC

- H04B 10/25891: {Transmission components (H04B10/40 takes precedence)}
- H04B 10/801: {using optical interconnects, e.g. light coupled isolators, circuit board interconnections}
- H04B: TRANSMISSION

## Abstract

An optical communication device includes an optical fiber, two chips, a light emitter, a photoelectric conversion device, and a circuit board. The chips includes a substrate, and a polarizing beam splitter positioned on the substrate, the polarizing beam splitter includes a first coupling device, second coupling device, a Y-waveguide, and a TM filter coupling to the third channel. The chips, the light emitter, and the photoelectric conversion device are coupled to the circuit board, the light emitter, and the photoelectric conversion device are connected electrically with the circuit board.

## Claims

### Claim 1

An optical communication device, comprising:
an optical fiber;
two chips coupled to the optical fiber, each of the two chips comprising:
a substrate; and
a polarizing beam splitter positioned on the substrate, the polarizing beam splitter comprising:
a first and second coupling device;
a Y-waveguide including a first channel corresponding to the first coupling device, a second channel corresponding to the second coupling device, and a third channel corresponding to the optical fiber; and
a TM filter coupled to the third channel;
a light emitter corresponding to the first coupling device;
a photoelectric conversion device corresponding to the second coupling device; and
a circuit board;
wherein the chips, the light emitter, and the photoelectric conversion device are coupled to the circuit board, the light emitter, and the photoelectric conversion device are connected electrically with the circuit board.

### Claim 2 (depends on 1)

The optical communication device in accordance with claim 1, wherein the substrate includes a top surface and a V-groove, the Y-waveguide, the first coupling device, and the second coupling device are formed from the top surface toward a inside portion of the substrate, the V-groove is configured to holding the optical fiber.

### Claim 3 (depends on 2)

The optical communication device in accordance with claim 2, wherein the light emitter includes a first surface, the first surface is parallel to the top surface, a first lens is defined on the first surface and is corresponded to the light emitter.

### Claim 4 (depends on 3)

The optical communication device in accordance with claim 3, wherein the photoelectric conversion device includes a second surface, the second surface is parallel to the top surface, a second lens is defined on the second surface and is corresponded to the photoelectric conversion device.

### Claim 5 (depends on 1)

The optical communication device in accordance with claim 1, wherein the first channel and the second channel are connected with the third channel, the first channel and the third channel are configured to transmit transverse electric waves and transverse magnetic waves, the second channel is configured to transmit transverse magnetic waves.

### Claim 6 (depends on 1)

The optical communication device in accordance with claim 1, wherein the first coupling device is configured to total-reflect a light beam toward the first channel and the light beam inputs the first channel, the second coupling device is configured to total-reflect the light beam from the second channel, and the light beam inputs photoelectric conversion device.

### Claim 7 (depends on 1)

The optical communication device in accordance with claim 1, wherein the substrate is formed by lithium niobate.

### Claim 8 (depends on 1)

The optical communication device in accordance with claim 1, wherein the substrate is formed by photoelectric material.

### Claim 9 (depends on 1)

The optical communication device in accordance with claim 1, wherein a width of the Y-waveguide is formed from 50 to 62.5 micrometer.

### Claim 10 (depends on 1)

The optical communication device in accordance with claim 1, wherein the light emitter is a laser diode.

### Claim 11 (depends on 1)

The optical communication device in accordance with claim 1, wherein the light emitter is a light emitting diode.

### Claim 12 (depends on 1)

The optical communication device in accordance with claim 1, wherein the chips are coupled to the circuit board via 3D IC package.