# US 2018/0024296 A1 · Distributed passive optical networks

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- Number: US 2018/0024296 A1
- Document ID: US20180024296A1
- Status: Published application
- Kind: A1
- Application number: 15/677,815
- Filed: 2017-08-15
- Published: 2018-01-25
- Earliest claimed: 2011-08-17
- Assignees: CommScope Technologies LLC
- Applicants: CommScope Technologies LLC
- Inventors: Douglas F. Dowling
- Web page: https://patentgrep.com/patent/US20180024296A1

## CPC

- H04Q 11/0003: {Details}
- G02B 6/262: {Optical details of coupling light into, or out of, or between fibre ends, e.g. special fibre end shapes or associated optical elements}
- G02B 6/44528: {Patch-cords; Connector arrangements in the system or in the box (routing arrangements H04Q1/00)}
- H04Q 11/0067: {Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring}
- H04Q: SELECTING (switches, relays, selectors H01H; wireless communication networks H04W)
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

A passive optical network includes one or more multi-service terminals each having a housing and a plurality of ruggedized plug-receiving distribution ports accessible from outside the housing. The multi-service terminals also each include an optical power splitter or wave division multiplexer for splitting an optical signal and directing the split signal to the plug-receiving distribution ports. Some of the multi-service terminals provide a different power split ratio from others of the multi-service terminals.

## Claims

### Claim 1

An optical system comprising:
a first enclosure that receives a first optical cable, the first enclosure defining a sealed interior;
an optical circuit disposed within the sealed interior of the first enclosure, the optical circuit configured to split power from optical signals carried over the first optical cable into two split signals;
a second enclosure separate from the first enclosure, the second enclosure defining a sealed interior containing an optical power splitter, the second sealed enclosure including a plurality of ruggedized optical ports;
an optical fiber that carries a first of the split signals from the first sealed enclosure to the second sealed enclosure, wherein the first of the split signals is input at the optical power splitter, wherein the optical signals carried over the optical fiber are not further split between the optical circuit and the second enclosure; and
an optical distribution cable that carries a second of the split signals away from the first sealed enclosure.

### Claim 2 (depends on 1)

The optical system of claim 1, wherein the optical circuit includes an optical power splitter.

### Claim 3 (depends on 2)

The optical system of claim 2, wherein the optical power splitter includes a 1 by 2 optical power splitter.

### Claim 4 (depends on 1)

The optical system of claim 1, wherein the first split signal has a first power level and the second split signal has a second power level that is different from the first power level.

### Claim 5 (depends on 4)

The optical system of claim 4, wherein the first split signals has a greater power level than the second split signal.

### Claim 6 (depends on 4)

The optical system of claim 4, wherein the first split signal has a power level of about 50% of the power of the optical signals carried over the first optical cable.

### Claim 7 (depends on 1)

The optical system of claim 1, wherein the optical circuit also is configured to further split the second split signal into a plurality of further split signals.

### Claim 8 (depends on 7)

The optical system of claim 7, wherein the optical circuit includes a first optical power splitter and a second optical power splitter, the first optical power splitter implementing the power split of the optical signals carried over the first optical cable into two split signals, the second optical power splitter implementing the further split of the second split signal into a plurality of further split signals.

### Claim 9 (depends on 7)

The optical system of claim 7, wherein the further split signals have power levels that are less than the first split signal.

### Claim 10 (depends on 1)

The optical system of claim 1, wherein the first enclosure includes a ruggedized input port.

### Claim 11 (depends on 10)

The optical power system of claim 10, wherein an optical connector interface is disposed at the ruggedized input port.

### Claim 12 (depends on 1)

The optical system of claim 1, wherein the first enclosure includes a ruggedized output port that is separate from the input port.

### Claim 13 (depends on 12)

The optical system of claim 12, wherein the ruggedized output port is one of a plurality of output ports.

### Claim 14 (depends on 1)

The optical system of claim 1, wherein the second enclosure includes a ruggedized input port.

### Claim 15 (depends on 14)

The optical power system of claim 14, wherein an optical connector interface is disposed at the ruggedized input port of the second enclosure.

### Claim 16 (depends on 1)

The optical system of claim 1, wherein the optical fiber is connectorized at both ends.