Pluggable optical module and optical communication system

Patent metadata

Field	Value
Publication number	US-11137662-B2
Application number	US-201716467137-A
Country	US
Kind code	B2
Filing date	Aug 1, 2017
Priority date	Dec 19, 2016
Publication date	Oct 5, 2021
Grant date	Oct 5, 2021

Abstract

A drive unit outputs a modulation signal based on a data signal input from an optical communication apparatus through a pluggable electric connector. An optical modulator outputs an optical signal generated by modulating a light output from a light source based on the modulation signal. A control unit controls a modulation operation of the optical modulator. The control unit outputs a driver signal instructing to start a setting operation to the optical communication apparatus. The optical communication apparatus monitors the modulation operation of the optical modulator in response to the driver signal and performs an operation of correcting the data signal and/or an operation of outputting a control signal representing a control setting for the modulation operation to the control unit based on a monitoring result. The control unit controls the modulation operation of the optical modulator based on the control signal when receiving the control signal.

First claim

What is claimed is:

1. A pluggable optical module comprising:
a pluggable electric connector configured to be insertable into or removable from an optical communication apparatus, the pluggable electric connector being capable of bi-directionally communicating with the optical communication apparatus;
a drive unit configured to output a modulation signal using a data signal input from the optical communication apparatus through the pluggable electric connector;
a light source;
an optical modulator configured to output an optical signal generated by modulating a light output from the light source using the modulation signal; and
a control unit configured to control a modulation operation of the optical modulator,
wherein the control unit is configured to output a driver signal instructing to start a setting operation to the optical communication apparatus through the pluggable electric connector, wherein the control unit is configured to control a bias voltage provided to the phase modulation area based on the control signal,
wherein the optical communication apparatus is configured to:
monitor the modulation operation of the optical modulator in response to the driver signal; and
perform one or both of an operation of correcting the data signal and an operation of outputting a control signal representing a control setting for the modulation operation to the control unit using a monitoring result, and

wherein the control unit is configured to control the modulation operation of the optical modulator using the control signal if receiving the control signal.

2. The pluggable optical module according to claim 1 , wherein the control unit is configured to control receiving operation information indicating a condition of the modulation operation from the optical modulator,
wherein the control unit is configured to output an operation signal using the operation information to the optical communication apparatus through the pluggable electric connector, and
wherein the optical communication apparatus is configured to monitor the condition of the modulation operation using the operation signal.

3. The pluggable optical module according to claim 2 , wherein the optical modulator is configured to output a signal generated by converting a part of the optical signal into an electric signal to the control unit as the operation information.

4. The pluggable optical module according to claim 1 , wherein the optical modulator is configured as a Mach-Zehnder type optical modulator in which the phase modulation area is disposed on an optical waveguide.

5. The pluggable optical module according to claim 1 , wherein the control unit is configured to, if the pluggable electric connector is inserted into the optical communication apparatus, output the driver signal, and
wherein the optical communication apparatus is configured to monitor the modulation operation of the optical modulator in response to the driver signal, and performs one or both of the operation of correcting the data signal and the operation of outputting the control signal to the control unit using the monitoring result.

6. An optical communication system comprising:
an optical communication apparatus; and
a pluggable optical module configured to be insertable into and removable from the optical communication apparatus, wherein:
the pluggable optical module comprises:
a pluggable electric connector configured to be insertable into or removable from the optical communication apparatus, the pluggable electric connector being capable of bi-directionally communicating with the optical communication apparatus;
a drive unit configured to output a modulation signal using a data signal input from the optical communication apparatus through the pluggable electric connector;
a light source;
an optical modulator configured to output an optical signal generated by modulating a light output from the light source using the modulation signal; and
a control unit configured to control a modulation operation of the optical modulator,

the control unit outputs a driver signal instructing to start a setting operation to the optical communication apparatus through the pluggable electric connector, wherein the control unit is configured to control a bias voltage provided to the phase modulation area based on the control signal,
the optical communication apparatus:
monitors the modulation operation of the optical modulator in response to the driver signal; and
performs one or both of an operation of correcting the data signal and an operation of outputting a control signal representing a control setting for the modulation operation to the control unit using a monitoring result, and

the control unit controls the modulation operation of the optical modulator using the control signal if receiving the control signal.

7. The optical communication system according to claim 6 , wherein:
the control unit receives operation information indicating a condition of the modulation operation from the optical modulator and outputs an operation signal using the operation information to the optical communication apparatus through the pluggable electric connector, and
the optical communication apparatus monitors the condition of the modulation operation using the operation signal.

8. The optical communication system according to claim 7 , wherein the optical modulator is configured to output a signal generated by converting a part of the optical signal into an electric signal to the control unit as the operation information.

9. The optical communication system according to claim 6 , wherein the optical modulator is configured as a Mach-Zehnder type optical modulator in which the phase modulation area is disposed on an optical waveguide.

10. The optical communication system according to claim 6 , wherein if the pluggable electric connector is inserted into the optical communication apparatus, the control unit outputs the driver signal, and
wherein the optical communication apparatus monitors the modulation operation of the optical modulator in response to the driver signal, and performs one or both of the operation of correcting the data signal and the operation of outputting the control signal to the control unit using the monitoring result.

Assignees

• Nec Corp

Inventors

• Yutani Katsuhiro

Classifications

• G02F1/2255 Primary

  controlled by a high-frequency electromagnetic component in an electric waveguide structure · CPC title

• G02F1/0121 Primary

  Operation of devices; Circuit arrangements, not otherwise provided for in this subclass · CPC title

• H04B10/40

  Transceivers · CPC title

• H04B10/50575

  to control the modulator DC bias · CPC title

• H04B10/43

  using a single component as both light source and receiver, e.g. using a photoemitter as a photoreceiver · CPC title