# US 10,320,487 B2 · Power management implementation in an optical link

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- Number: US 10,320,487 B2
- Document ID: US10320487B2
- Status: Granted
- Kind: B2
- Application number: 15/696,832
- Filed: 2017-09-06
- Published: 2017-12-21
- Granted: 2019-06-11
- Earliest claimed: 2010-12-21
- Assignees: Intel Corporation
- Applicants: Intel Corporation
- Inventors: Klaus D. Giessler; Christine M. Krause
- Web page: https://patentgrep.com/patent/US10320487B2

## CPC

- H04B 10/524: Pulse modulation
- H04B 10/40: Transceivers
- H04B 10/508: Pulse generation, e.g. generation of solitons
- H04B 2210/08: Shut-down or eye-safety
- H04Q 11/0062: {Network aspects}
- H04Q 2011/0079: {Operation or maintenance aspects}
- H04B: TRANSMISSION
- H04Q: SELECTING (switches, relays, selectors H01H; wireless communication networks H04W)

## Abstract

An optical link power management scheme takes the best advantage of a dynamic connection environment, where ports may be connected and disconnected at any time, and where data flows may start and stop as needed by the applications using the high speed data links. Power consumption is optimized, eye safety standards are met, and robust connection detection is preserved.

## Claims

### Claim 1

An optical apparatus, comprising:
a connector including:
a housing; and
a plug head disposed at least in part in the housing, wherein the plug head includes a first optical port and a second optical port;
an optical cable joined with the housing to couple with the first and second optical ports, to provide an optical link with another optical apparatus;
wherein an optical transmitter module is to connect with the first optical port, and an optical receiver module is to connect with the second optical port;
wherein the optical transmitter module and optical receiver module are to further provide the optical link with the other optical apparatus, wherein the optical transmitter module is to: remain in a first power state in an absence of a connection between the optical apparatus and another optical apparatus via the optical link; enter a second power state in response to a detection of the connection by the optical receiver module, wherein the second power state is higher than a first power state; and transition to a third power state in response to a detection, by the optical receiver module, of entering of the other optical apparatus into a fourth power state, wherein the third power state is higher than a second power state.

### Claim 2 (depends on 1)

The optical apparatus of claim 1, further comprising: the optical transmitter module; and
the optical receiver module.

### Claim 3 (depends on 2)

The optical apparatus of claim 2, wherein the optical transmitter module and optical receiver module comprise an optical module.

### Claim 4 (depends on 1)

The optical apparatus of claim 1, wherein the plug head further includes one or more openings disposed on a side of the plug head, to lock the connector with a mating connector of the optical link.

### Claim 5 (depends on 1)

The optical apparatus of claim 1, wherein the optical apparatus comprises an optical universal serial bus (USB) device.