# US 11,906,797 B2 · Pluggable optical module and optical communication system

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- Number: US 11,906,797 B2
- Document ID: US11906797B2
- Status: Granted
- Kind: B2
- Application number: 17/984,478
- Filed: 2022-11-10
- Published: 2023-03-02
- Granted: 2024-02-20
- Earliest claimed: 2015-06-15
- Assignees: NEC Corporation
- Applicants: NEC Corporation
- Inventors: Yuuji Minota
- Web page: https://patentgrep.com/patent/US11906797B2

## CPC

- G02B 6/4246: {Bidirectionally operating package structures}
- G02B 6/255: Splicing of light guides, e.g. by fusion or bonding
- G02B 6/42: Coupling light guides with opto-electronic elements
- G02B 6/423: {using guiding surfaces for the alignment}
- G02B 6/4249: {comprising arrays of active devices and fibres}
- G02B 6/4278: {related to pluggable or demountable opto-electronic or electronic elements}
- G02B 6/428: {containing printed circuit boards [PCB]}
- G02B 6/4292: {the light guide being disconnectable from the opto-electronic element, e.g. mutually self aligning arrangements}
- G02B 6/4293: {hybrid electrical and optical connections for transmitting electrical and optical signals}
- G02B 6/4454: {with splices}
- G02B 6/4457: {Bobbins; Reels}
- G02B 6/46: Processes or apparatus adapted for installing {or repairing} optical fibres or optical cables (installation of cables containing electric conductors and optical fibres H02G)
- H04B 10/40: Transceivers
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- H04B: TRANSMISSION

## Abstract

An object is, in a pluggable optical module, to compactly house an optical fiber used for connecting optical components in a housing in which a plurality of optical components are mounted. The pluggable optical module (100) includes: a plurality of optical components, a printed circuit board (51); one or more optical fibers; and optical fiber housing means (14). All or a part of the plurality of optical components are mounted on the printed circuit board (51). One or more optical fibers connect between the plurality of optical components. The optical fiber housing means (14) includes a guide that is disposed on a plate-like member and can wind the one or more optical fibers, and mounted to be stacked with the printed circuit board (51) on which the optical components are mounted and all or a part of optical components other than the optical components mounted on the printed circuit board (51).

## Claims

### Claim 1

A pluggable optical module comprising:
a pluggable electric connector configured to connect with an optical communication apparatus;
a pluggable optical receptor configured to connect with an outer optical fiber transmitting a first optical signal;
an optical output module configured to output a second optical signal and a local oscillation light;
an optical receiver configured to receive the first optical signal by interfering with the local oscillation light;
a first printed circuit board configured to connect with the optical receiver;
a first optical fiber configured to transmit the first optical signal;
a second optical fiber configured to transmit the local oscillation light;
a third optical fiber configured to transmit the second optical signal; and
a guide configured to wind the first optical fiber, the second optical fiber and the third optical fiber,
wherein a part of the guide is located between a part of the first printed circuit board and a part of the optical output module.

### Claim 2 (depends on 1)

The pluggable optical module according to claim 1, wherein a part of the guide is located between a part of the first printed circuit board and a part of a second printed circuit board.

### Claim 3 (depends on 1)

The pluggable optical module according to claim 1, wherein both of the optical output module and the optical reception module are connected with the printed circuit board.

### Claim 4 (depends on 1)

The pluggable optical module according to claim 1, wherein the guide includes a projection that projects outward from an outer perimeter of the guide, and
wherein the first to third optical fibers pass under the projection of the guide.

### Claim 5 (depends on 1)

The pluggable optical module according to claim 1, wherein a part or all of the first to third optical fibers include a splice.

### Claim 6 (depends on 1)

The pluggable optical module according to claim 1, wherein an entirety of the guide is located between a part of the first printed circuit board and a part of the optical output module.