# US 12,224,805 B2 · Optical emission apparatus, optical communication system, and optical communication method

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- Number: US 12,224,805 B2
- Document ID: US12224805B2
- Status: Granted
- Kind: B2
- Application number: 18/157,197
- Filed: 2023-01-20
- Published: 2023-05-18
- Granted: 2025-02-11
- Earliest claimed: 2020-07-22
- Assignees: Huawei Technologies Co., Ltd.
- Applicants: Huawei Technologies Co., Ltd.
- Inventors: Chunhui Zhang; Shengyong Yan; Lei Xiong
- Web page: https://patentgrep.com/patent/US12224805B2

## CPC

- H04B 10/1121: {One-way transmission}
- H04B 10/614: {comprising one or more polarization beam splitters, e.g. polarization multiplexed [PolMux] X-PSK coherent receivers, polarization diversity heterodyne coherent receivers (H04J14/06 takes precedence)}
- H04B 10/07955: {Monitoring or measuring power}
- H04B 10/112: Line-of-sight transmission over an extended range
- H04B 10/564: Power control
- H04B: TRANSMISSION

## Abstract

This application provides an optical emission apparatus, an optical communication system, and an optical communication method. Light beams of N optical emission units in the optical emission apparatus are adjusted, so that an optical power of entering an optical receiving apparatus is maximized, and impact of a speckle caused by turbulence is minimized, thereby improving receiving efficiency of an optical antenna. The optical emission apparatus includes a first optical splitter and N optical emission units, where N is an integer greater than 1; the first optical splitter is configured to transmit received same signal light to the N optical emission units; and the N optical emission units are configured to output the signal light from the first optical splitter, to obtain light beams distributed based on a preset proportion.

## Claims

### Claim 1

An optical emission apparatus, comprising: a first optical splitter, N optical emission units, wherein N is an integer greater than 1, and an adjustment unit;
the first optical splitter is configured to receive signal light and transmit respective parts of the received signal light to each of the N optical emission units;
the N optical emission units are configured to emit, based on the respective parts of the signal light received from the first optical splitter, light beams distributed based on a preset proportion that provides a higher optical power of the received signal light to one or more optical emission units in a center of the N optical emission units than to others of the N optical emission units; and
the adjustment unit is configured to adjust, based on returned optical power information received on a backhaul channel from a device external to the optical emission apparatus, the light beams emitted by the N optical emission units.

### Claim 2 (depends on 1)

The optical emission apparatus according to claim 1, wherein the first optical splitter is configured to divide the signal light into N parts based on the preset proportion, and transmit each of the N parts to a respective optical emission unit of the N optical emission units, wherein the preset proportion is determined based on a preset model.

### Claim 3 (depends on 1)

The optical emission apparatus according to claim 1, wherein the adjusting the light beams emitted by the N optical emission units comprises:
adjusting, by the adjustment unit, beam angles of the light beams emitted by the N optical emission units.

### Claim 4 (depends on 3)

The optical emission apparatus according to claim 3, wherein the adjusting, by the adjustment unit, the beam angles of the light beams emitted by the N optical emission units comprises:
adjusting, by the adjustment unit, a beam angle of an nth optical emission unit of the N optical emission units in a first direction, and adjusting, by the adjustment unit, the beam angle of the nth optical emission unit of the N optical emission units in a second direction, wherein 1≤n<N, and the first direction is perpendicular to the second direction; and
adjusting, by the adjustment unit, a beam angle of an (n+1)th optical emission unit of the N optical emission units in a third direction, and adjusting, by the adjustment unit, the beam angle of the (n+1)th optical emission unit of the N optical emission units in a fourth direction, wherein the third direction is perpendicular to the fourth direction.

### Claim 5 (depends on 3)

The optical emission apparatus according to claim 3, wherein each of the N optical emission units comprises a driving apparatus, a tail fiber, and a lens;
the driving apparatus of an optical emission unit of the N optical emission units is connected to the tail fiber, and is configured to push the tail fiber to change a location of the tail fiber, to adjust a beam angle of the optical emission unit; and
a light beam output by the tail fiber reaches the lens, and the lens is configured to expand the light beam output by the tail fiber.

### Claim 6 (depends on 3)

The optical emission apparatus according to claim 3, wherein the optical emission apparatus further comprises H optical amplifiers, and each optical amplifier of the H optical amplifiers is connected to one or more of the N optical emission units, wherein His an integer greater than or equal to 1; and
wherein the adjusting, by the adjustment unit, the beam angles of the light beams emitted by the N optical emission units comprises:
adjusting, by the adjustment unit, gains of the H optical amplifiers to change optical output powers of the light beams emitted by the N optical emission units.

### Claim 7 (depends on 6)

The optical emission apparatus according to claim 6, wherein the adjusting, by the adjustment unit, the gains of the H optical amplifiers comprises:
adjusting, by the adjustment unit, a gain of an hth optical amplifier of the H optical amplifiers to change an optical output power of the light beam emitted by the nth optical emission unit of the N optical emission units, and the optical emission apparatus is configured to adjust a gain of an (h+1)th optical amplifier of the H optical amplifiers, to change an optical output power of a light beam emitted by the (n+1)th optical emission unit of the N optical emission units, wherein 1≤h<H and 1≤n<N.

### Claim 8 (depends on 1)

The optical emission apparatus according to claim 1, further comprising L phase modulators, and each phase modulator of the L phase modulators is connected to at least one optical emission unit of the N optical emission units, wherein L is an integer greater than or equal to 1; and
wherein the adjustment unit is further configured to adjust the L phase modulators to change phases of the light beams emitted by the N optical emission units.

### Claim 9 (depends on 8)

The optical emission apparatus according to claim 8, wherein that the adjustment unit is further configured to adjust the L phase modulators comprises:
the adjustment unit is further configured to adjust an lth phase modulator of the L phase modulators, to adjust a phase of a light beam of an nth optical emission unit of the N optical emission units, wherein 1≤l≤L and 1≤n≤N.

### Claim 10

An optical transceiver apparatus, comprising an optical emission apparatus, and further comprising: an optical receiving apparatus, a second optical splitter, and a photodetector;
the optical receiving apparatus is configured to receive a light beam emitted by a peer-end optical transceiver apparatus, and transmit the light beam to the second optical splitter;
the second optical splitter is configured to perform an optical split on the light beam transmitted by the optical receiving apparatus, and transmit, to the photodetector, a first partial light beam obtained after the optical split; and
the photodetector is configured to detect an optical power of the first partial light beam, and return optical power information over a backhaul channel to the peer-end optical transceiver apparatus;
wherein the optical emission apparatus comprises a first optical splitter, N optical emission units, wherein N is an integer greater than 1, and an adjustment unit;
the first optical splitter is configured to receive signal light and transmit respective parts of the received signal light to each of the N optical emission units;
the N optical emission units are configured to emit, based on the respective parts of the signal light received from the first optical splitter, light beams distributed based on a preset proportion that provides a higher optical power of the received signal light to one or more optical emission units in a center of the N optical emission units than to others of the N optical emission units; and
the adjustment unit is configured to adjust, based on returned optical power information on the backhaul channel, the light beams emitted by the N optical emission units.

### Claim 11 (depends on 10)

The optical transceiver apparatus according to claim 10, wherein the first optical splitter is configured to divide the signal light into N parts based on the preset proportion, and transmit each of the N parts to a respective optical emission unit of the N optical emission units, wherein the preset proportion is determined based on a preset model.

### Claim 12 (depends on 10)

The optical transceiver apparatus according to claim 10, wherein the adjusting the light beams emitted by the N optical emission units comprises:
adjusting, by the adjustment unit, beam angles of the light beams emitted by the N optical emission units.

### Claim 13 (depends on 12)

The optical transceiver apparatus according to claim 12, wherein the adjusting, by the adjustment unit, the beam angles of the light beams emitted by the N optical emission units comprises:
adjusting, by the adjustment unit, a beam angle of an nth optical emission unit of the N optical emission units in a first direction, and adjusting, by the adjustment unit, the beam angle of the nth optical emission unit of the N optical emission units in a second direction, wherein 1≤n<N, and the first direction is perpendicular to the second direction; and
adjusting, by the adjustment unit, a beam angle of an (n+1)th optical emission unit of the N optical emission units in a third direction, and adjusting, by the adjustment unit, the beam angle of the (n+1)th optical emission unit of the N optical emission units in a fourth direction, wherein the third direction is perpendicular to the fourth direction.

### Claim 14

An optical communication system, comprising an optical emission apparatus, and further comprising: an optical receiving apparatus, a second optical splitter, and a photodetector;
the optical receiving apparatus is configured to receive the signal light emitted by the optical emission apparatus, and transmit the signal light to the second optical splitter;
the second optical splitter is configured to perform an optical split on the light beam, and transmit, to the photodetector, a first partial light beam obtained after the optical split; and
the photodetector is configured to detect an optical power of the first partial light beam obtained by the second optical splitter through the split, and return optical power information on a backhaul channel to the optical emission apparatus;
wherein the optical emission apparatus comprises a first optical splitter, N optical emission units, wherein N is an integer greater than 1, and an adjustment unit;
the first optical splitter is configured to receive signal light and transmit respective parts of the received signal light to each of the N optical emission units;
the N optical emission units are configured to emit, based on the respective parts of the signal light received from the first optical splitter, light beams distributed based on a preset proportion that provides a higher optical power of the received signal light to one or more optical transmission units in a center of the N optical transmission units than to others of the N optical transmission units; and
the adjustment unit is configured to adjust, based on returned optical power information received on the backhaul channel, the light beams emitted by the N optical emission units.

### Claim 15 (depends on 14)

The optical communication system according to claim 14, wherein the first optical splitter is configured to divide the signal light into N parts based on the preset proportion, and transmit each of the N parts to a respective optical emission unit of the N optical emission units, wherein the preset proportion is determined based on a preset model.

### Claim 16 (depends on 14)

The optical communication system according to claim 14, wherein the adjusting the light beams emitted by the N optical emission units comprises:
adjusting, by the adjustment unit, beam angles of the light beams emitted by the N optical emission units.

### Claim 17

An optical communication method, comprising:
controlling a first optical splitter to receive signal light and to transmit respective parts of the received signal light to each of N optical emission units, wherein the N optical emission units emit, based on the signal light from the first optical splitter, light beams distributed based on a preset proportion that provides a higher optical power of the received signal light to each of one or more optical emission units in a center of the N optical emission units than to others of the N optical emission units, and N is an integer greater than 1;
receiving returned optical power information; and
adjusting, based on the optical power information received on a backhaul channel from a device external to the optical emission apparatus, the light beams emitted by the N optical emission units.

### Claim 18 (depends on 17)

The method according to claim 17, wherein the adjusting the light beams emitted by the N optical emission units comprises adjusting beam angles of the light beams emitted by the N optical emission units.

### Claim 19 (depends on 18)

The method according to claim 18, wherein the adjusting the light beams emitted by the N optical emission units further comprises adjusting gains of the light beams emitted by the N optical emission units.

### Claim 20 (depends on 17)

The method according to claim 17, wherein the adjusting the light beams emitted by the N optical emission units comprises adjusting phases of the light beams emitted by the N optical emission units.