CN110875781B

CN110875781B - Optical module

Info

Publication number: CN110875781B
Application number: CN201811016912.2A
Authority: CN
Inventors: 程竞驰; 谢崇进
Original assignee: Alibaba Group Holding Ltd
Current assignee: Alibaba Group Holding Ltd
Priority date: 2018-08-31
Filing date: 2018-08-31
Publication date: 2022-08-02
Anticipated expiration: 2038-08-31
Also published as: CN110875781A

Abstract

The application provides an optical module, its characterized in that includes: the optical switch comprises a first laser, a second laser, a first optical switch, a second optical switch, a first optical splitter, a second optical splitter, a third optical splitter and an optical waveguide; the first optical switch and the second optical switch are respectively arranged on the optical output paths of the first laser and the second laser; the two output ports of the first optical switch are respectively connected with the first input port of the first optical splitter and the first input port of the third optical splitter through optical waveguides; and two output ports of the second optical switch are respectively connected with a second input port of the second optical splitter and a second input port of the third optical splitter through optical waveguides. By adopting the optical module provided by the application, the problem that the access cannot be recovered in a short time under the condition that one laser in the transmitting device of the optical module is invalid is solved.

Description

Optical module

Technical Field

The application relates to the technical field of optical fiber communication, in particular to an optical module.

Background

Data centers consist of thousands of servers interconnected over distances ranging from a few meters (server to switch) to no more than 2 kilometers (switch to switch), with connection rates that continue to increase. The interface bandwidth of the switch is steadily increasing according to moore's law, and since Gb ethernet, optical communication technology has been widely used for interconnection within data centers. Because of the short distance, optical fibers are easy to route, and unlike long haul trunks, parallel links are typically used inside data centers to increase interconnection rates.

As for 100G and 400G, 4 parallel channels, i.e., 4x25G and 4x100G, are used, and when the 4 parallel channels are 4 fibers, the corresponding modules are PSM4 and DR4, respectively. When the module uses an external modulator, such as a mach-zehnder modulator, the number of lasers may be reduced by splitting light in order to save device cost. For example, 2 lasers are used, the output of each laser passes through a 50: 50 optical splitter, and the split 4 paths of light are sent to a modulator to be modulated to generate 4 paths of optical signals. With this solution, when one of the lasers is broken, the two signals will be affected, and the solution can only be to replace the laser or the whole module, so the path cannot be restored in a short time.

Disclosure of Invention

The application provides an optical module, which aims to solve the problem that a path cannot be recovered in a short time under the condition that one laser in a transmitting device of the optical module fails.

The application provides an optical module, includes: the optical switch comprises a first laser, a second laser, a first optical switch, a second optical switch, a first optical splitter, a second optical splitter, a third optical splitter and an optical waveguide;

the first optical switch and the second optical switch are respectively arranged on the optical output paths of the first laser and the second laser;

the two output ports of the first optical switch are respectively connected with the first input port of the first optical splitter and the first input port of the third optical splitter through optical waveguides;

the two output ports of the second optical switch are respectively connected with a second input port of the second optical splitter and a second input port of the third optical splitter through optical waveguides;

two output ports of the third optical splitter are respectively connected with the second input port of the first optical splitter and the first input port of the second optical splitter through optical waveguides;

the first optical splitter and the second optical splitter are both provided with two output ports, and optical waveguides connected to the output ports provide optical signals.

Optionally, the first optical switch and the second optical switch are an input port and two output port optical switches.

Optionally, the optical splitter further includes four modulators, and the four modulators are respectively connected to the four output ports of the first optical splitter and the second optical splitter through optical waveguides.

Optionally, the optical module is an optical module that performs multiplexing by using four parallel channels.

Optionally, the optical module is a coherent optical module.

Optionally, the optical transceiver further includes two modulators and two coherent receivers, the first modulator is connected to the first output port of the first optical splitter through an optical waveguide, the first coherent receiver is connected to the second output port of the first optical splitter through an optical waveguide, the second modulator is connected to the second output port of the second optical splitter through an optical waveguide, and the second coherent receiver is connected to the first output port of the second optical splitter through an optical waveguide.

The present application further provides an optical module, including: the optical waveguide comprises a first laser, a second laser, a first optical splitter, a second optical splitter, a third optical splitter and an optical waveguide;

the first laser is connected with a first input port of the third optical splitter through an optical waveguide;

the second laser is connected with a second input port of the third optical splitter through an optical waveguide;

two output ports of the third optical splitter are respectively connected with the first input port of the first optical splitter and the first input port of the second optical splitter through optical waveguides;

Optionally, the optical fiber coupler further includes two modulators and two coherent receivers, the two modulators are respectively connected to the two output ports of the first optical splitter and the second optical splitter through optical waveguides, and the two coherent receivers are respectively connected to the two output ports of the first optical splitter and the second optical splitter through optical waveguides.

The application also provides a data center system which comprises at least two optical modules and at least two switches;

the optical module includes: the optical switch comprises a first laser, a second laser, a first optical switch, a second optical switch, a first optical splitter, a second optical splitter, a third optical splitter and an optical waveguide;

the first optical splitter and the second optical splitter are respectively provided with two output ports, and optical waveguides connected to the output ports provide optical signals;

the optical module is used for communication between the switches.

The present application further provides an optical module, including: the optical switch comprises a first laser, a second laser, a first optical switch, a second optical switch, a first optical splitter, a second optical splitter, a third optical splitter and an optical waveguide;

the two output ports of the first optical switch are respectively connected with the input port of the first optical splitter and the first input port of the third optical splitter through optical waveguides;

the two output ports of the second optical switch are respectively connected with the input port of the second optical splitter and the second input port of the third optical splitter through optical waveguides;

two output ports of the third optical splitter are respectively connected with an input port of the first optical splitter and an input port of the second optical splitter through optical waveguides;

The present application further provides an optical module, comprising: the optical switch comprises a first laser, a second laser, a first optical switch, a second optical switch, a first optical splitter, a second optical splitter and a third optical splitter;

two output ports of the first optical switch are respectively connected with a first input port of the first optical splitter and a first input port of the third optical splitter;

two output ports of the second optical switch are respectively connected with a second input port of the second optical splitter and a second input port of the third optical splitter;

two output ports of the third optical splitter are respectively connected with the second input port of the first optical splitter and the first input port of the second optical splitter;

the first optical splitter and the second optical splitter are both provided with two output ports and used for outputting optical signals after light splitting.

The application provides an optical module, includes: the optical switch comprises a first laser, a second laser, a first optical switch, a second optical switch, a first optical splitter, a second optical splitter, a third optical splitter and an optical waveguide; the first optical switch and the second optical switch are respectively arranged on the optical output paths of the first laser and the second laser;

the two output ports of the first optical switch are respectively connected with the first input port of the first optical splitter and the first input port of the third optical splitter through optical waveguides; the two output ports of the second optical switch are respectively connected with a second input port of the second optical splitter and a second input port of the third optical splitter through optical waveguides; two output ports of the third optical splitter are respectively connected with the second input port of the first optical splitter and the first input port of the second optical splitter through optical waveguides; the first optical splitter and the second optical splitter are both provided with two output ports, and optical waveguides connected to the output ports provide optical signals.

By adopting the optical module provided by the application, when a laser fails, the path can be quickly recovered in a mode of switching the optical path, and the problem that the path cannot be recovered in a short time under the condition that one laser in the transmitting device of the optical module fails is solved.

Drawings

Fig. 1 is a flowchart of a first embodiment of an optical module provided in the present application.

Fig. 2 is a schematic diagram of a conventional PSM4 arrangement to which the first embodiment of the present application relates.

Fig. 3 is a schematic diagram of a PSM4 optical module according to a first embodiment of the present application.

Fig. 4 is a flowchart of a second embodiment of a method for using the optical module provided in the present application.

Fig. 5 is a flowchart of a third embodiment of a method for using the optical module provided in the present application.

Fig. 6 is a flowchart of a fourth embodiment of a method for using the optical module provided in the present application.

Fig. 7 is a schematic diagram of a conventional coherent optical module according to a first embodiment of the present application.

Fig. 8 is a schematic diagram of a coherent optical module according to a first embodiment of the present application.

Fig. 9 is a flowchart of a fifth embodiment of a method for using a coherent optical module provided by the present application.

Fig. 10 is a flowchart of a sixth embodiment of a method for using a coherent optical module provided by the present application.

Fig. 11 is a flowchart of a seventh embodiment of a method for using a coherent optical module provided by the present application.

Fig. 12 is a flowchart of an eighth embodiment of an optical module provided in the present application.

Fig. 13 is a schematic diagram of an optical module according to an eighth embodiment of the present application.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of implementation in many different ways than those herein set forth and of similar import by those skilled in the art without departing from the spirit of this application and is therefore not limited to the specific implementations disclosed below.

A first embodiment of the present application provides an optical module. Please refer to fig. 1, which is a flowchart illustrating a first embodiment of the present application. The first embodiment of the present application will be described in detail below with reference to fig. 1. The implementation method of the optical module comprises the following steps:

step S101, the optical module includes: the optical switch comprises a first laser, a second laser, a first optical switch, a second optical switch, a first optical splitter, a second optical splitter, a third optical splitter and an optical waveguide.

This step is used to provide the components of the optical module, i.e., the first laser, the second laser, the first optical switch, the second optical switch, the first optical splitter, the second optical splitter, the third optical splitter, and the optical waveguide.

The optical module is a PSM4 optical module or a DR4 optical module.

The PSM4 optical module, i.e., a parallel single-mode four-channel optical module, is a commonly used optical fiber communication mode that adopts 4 parallel channels for 100G bandwidth. Fig. 2 is a schematic diagram of the transmitting part in a conventional PSM4 scheme. The DR4 module is a corresponding fiber communication mode adopting 4 parallel channels for 400G bandwidth, and the scheme provided by the application is also applicable to the DR4 module.

In fig. 2, 2 lasers are used, the output of each laser passes through a 50/50 optical splitter, and the split 4 paths of light are sent to the modulators respectively to be modulated to generate 4 paths of optical signals. With this solution, when one of the lasers is broken, the two signals will be affected, and the solution can only be to replace the laser or the whole module, so the path cannot be restored in a short time.

The optical fiber coupler also comprises four modulators which are respectively connected with four output ports of the first optical splitter and the second optical splitter through optical waveguides.

In order to solve the problem that the path cannot be recovered in a short time, the application provides an optical module. Please refer to fig. 3, which is a schematic diagram of the optical module. In comparison with fig. 2, two optical switches and one optical splitter are added in fig. 3.

Taking fig. 3 as an example, the first laser in the present application, i.e., the laser 1 in fig. 3, the second laser in the present application, i.e., the laser 2 in fig. 3, the first optical switch in the present application, i.e., the optical switch in fig. 3 having the port a and the port B, the second optical switch in the present application, i.e., the optical switch in fig. 3 having the port C and the port D, the first optical splitter in the present application, i.e., the optical splitter 1 in fig. 3, the second optical splitter in the present application, i.e., the optical splitter 2 in fig. 3, and the third optical splitter in the present application, i.e., the optical splitter 3 in fig. 3.

An optical switch is an optical device with one or more selectable transmission ports that functions to physically switch or logically operate optical signals in an optical transmission line or integrated optical circuit.

The optical splitter is an optical fiber junction device for coupling, branching and distributing optical signals in an optical network system.

The first optical switch and the second optical switch are input port and two output port optical switches.

As shown in fig. 3, the first optical switch and the second optical switch are an input port and two output port optical switches.

The optical module is a coherent optical module.

The optical module provided by the application can also be a coherent optical module.

The coherent optical module further comprises two modulators and two coherent receivers, the two modulators are respectively connected to the two output ports of the first optical splitter and the second optical splitter through optical waveguides, and the two coherent receivers are respectively connected to the two output ports of the first optical splitter and the second optical splitter through optical waveguides.

Fig. 7 is a schematic diagram of a conventional coherent optical module, as shown in fig. 7, which employs 2-way parallel channels. In order to save the cost of the device, the signal light and the local oscillator light of the device are output from the same laser, so that 2 lasers are required in total. When one of the lasers fails, only the laser or the entire module can be replaced.

Fig. 8 is a schematic diagram of a coherent optical module according to the present application. The first laser of the present application, i.e., the laser 1 in fig. 8, the second laser of the present application, i.e., the laser 2 in fig. 8, the first optical switch of the present application, i.e., the optical switch having the port a and the port B in fig. 8, the second optical switch of the present application, i.e., the optical switch having the port C and the port D in fig. 8, the first optical splitter of the present application, i.e., the optical splitter 1 in fig. 8, the second optical splitter of the present application, i.e., the optical splitter 2 in fig. 8, the third optical splitter of the present application, i.e., the optical splitter 3 in fig. 8, the first modulator of the present application, i.e., the modulator corresponding to the transmission signal 1 in fig. 8, the second modulator of the present application, i.e., the modulator corresponding to the transmission signal 2 in fig. 8, the first coherent receiver of the present application, i.e., the coherent receiver 1 in fig. 8, and the second coherent receiver 2 in fig. 8.

Step S102, the first optical switch and the second optical switch are respectively disposed in the optical output paths of the first laser and the second laser.

The step is configured to provide connection information of the first optical switch and the second optical switch, where the first optical switch and the second optical switch are respectively disposed in optical output paths of the first laser and the second laser.

As shown in fig. 3, the first switch is located in the output path of the laser 1 and the second switch is located in the output path of the laser 2.

And step S103, connecting the two output ports of the first optical switch with the first input port of the first optical splitter and the first input port of the third optical splitter through optical waveguides, respectively.

The step is configured to provide connection information of two output ports of the first optical switch, where the two output ports of the first optical switch are respectively connected to the first input port of the first optical splitter and the first input port of the third optical splitter through optical waveguides.

As shown in fig. 3, the output port a of the first optical switch is connected to the first input port of the first optical splitter, and the output port B of the first optical switch is connected to the first input port of the third optical splitter.

And step S104, connecting the two output ports of the second optical switch to the second input port of the second optical splitter and the second input port of the third optical splitter through optical waveguides, respectively.

The two output ports of the second optical switch are respectively connected with the second input port of the second optical splitter and the second input port of the third optical splitter through optical waveguides.

As shown in fig. 3, the output port C of the second optical switch is connected to the second input port of the third optical splitter through an optical waveguide, and the output port D of the second optical switch is connected to the second input port of the second optical splitter through an optical waveguide.

Step S105, two output ports of the third optical splitter are respectively connected to the second input port of the first optical splitter and the first input port of the second optical splitter through optical waveguides.

This step is used to explain the output information of the third optical splitter, and two output ports of the third optical splitter are respectively connected to the second input port of the first optical splitter and the first input port of the second optical splitter through optical waveguides.

As shown in fig. 3, the first output port of the third optical splitter is connected to the second input port of the first optical splitter through an optical waveguide, and the second output port of the third optical splitter is connected to the first input port of the second optical splitter through an optical waveguide.

And step S106, the first optical splitter and the second optical splitter are respectively provided with two output ports, and the optical waveguides connected to the output ports provide optical signals.

This step is used to provide the output port information of the first optical splitter and the second optical splitter, that is, the first optical splitter and the second optical splitter are both provided with two output ports, and the optical waveguides connected to the output ports provide optical signals.

As shown in fig. 3, the first optical splitter and the second optical splitter are both provided with two output ports.

In the above embodiments, an optical module is provided, and in accordance with this application, a method of using the PSM4 optical module of this application is provided. Please refer to fig. 4, which is a flowchart of an embodiment of a method for using the optical module. This embodiment, the second embodiment of the present application. A second embodiment of the present application will be described in detail below with reference to fig. 4. The method comprises the following steps:

step S401, configuring the first optical switch, and switching the optical path of the first laser to a first output port of the first optical switch.

This step is used to configure the first optical switch, and switch the optical path of the first laser to the first output port of the first optical switch.

And under the condition that both the first laser and the second laser can work normally, configuring the first optical switch to switch the optical path of the first laser to a first output port of the first optical switch. Taking fig. 3 as an example, in the present application, the first laser is the laser 1 in fig. 3, the first output port of the first optical switch is the port a in fig. 3, and switching the optical path of the first laser to the first output port of the first optical switch is to configure the first optical switch connected to the laser 1 in fig. 3, so that the port a outputs the laser output by the first laser, and the port B does not output the laser output by the first laser.

The first modulator of the present application corresponds to the transmission signal 1 in fig. 3, and the second modulator of the present application corresponds to the transmission signal 2 in fig. 3. Under the condition that the laser 1 and the laser 2 are both normal, the optical path 1 of the laser 1 is as follows: the optical switch comprises a laser 1, a first optical switch port A, an optical splitter 1 and a first modulator; the optical path 2 of the laser 1 is: the optical switch comprises a laser 1, a first optical switch port A, an optical splitter 1 and a second modulator.

Step S402, configuring the second optical switch, and switching the optical path of the second laser to a second output port of the second optical switch.

This step is used to configure the second optical switch, and switch the optical path of the second laser to the second output port of the second optical switch.

And under the condition that both the first laser and the second laser can work normally, configuring the second optical switch to switch the optical path of the second laser to a second output port of the second optical switch. Taking fig. 3 as an example, in the present application, the second laser is the laser 2 in fig. 3, the second output port of the second optical switch is the port D in fig. 3, switching the optical path of the second laser to the second output port of the second optical switch is to configure the second optical switch connected to the laser 2 in fig. 3, so that the port D outputs the laser output by the first laser, and the port B does not output the laser output by the first laser.

The third modulator of the present application corresponds to the transmission signal 3 in fig. 3, and the fourth modulator of the present application corresponds to the transmission signal 4 in fig. 3. Under the condition that the laser 1 and the laser 2 are both normal, the optical path 1 of the laser 2 is as follows: a laser 2, a second optical switch port D, an optical splitter 2 and a third modulator; the optical path 2 of the laser 2 is: a laser 2, a second optical switch port D, an optical splitter 2 and a fourth modulator.

The application provides a method of using the optical module. Please refer to fig. 5, which is a flowchart of an embodiment of a method for using the optical module. This embodiment, the third embodiment of the present application. The third embodiment is used to describe a method for using the parallel single-mode four-channel optical module based on the optical switch and the optical splitter provided in the present application when the first laser cannot be used normally. A third embodiment of the present application will be described in detail below with reference to fig. 5. The method comprises the following steps:

step S501, configuring the second optical switch, and switching the optical path of the second laser to the first output port of the second optical switch.

This step is used to configure the second optical switch, and switch the optical path of the second laser to the first output port of the second optical switch.

Taking fig. 3 as an example, the second laser of the present application, i.e., the laser 2 in fig. 3, the second optical switch of the present application, i.e., the lower optical switch in fig. 3, and the first laser of the present application, i.e., the laser 1 in the figure. In fig. 3, when the laser 1 cannot be normally used, the second optical switch is configured to switch the optical path of the second laser to the first output port of the second optical switch, and in this case, the optical path 1 of the second laser is as follows, corresponding to fig. 3: laser 2, port C of the second optical switch, optical splitter 3, optical splitter 1, the optical path 2 of the second laser is: a laser 2, a port C of a second optical switch, an optical splitter 3 and an optical splitter 2; at this time, the port D of the second optical switch does not output laser light.

Step S502, the first laser is closed.

This step is used to turn off the first laser.

In order to avoid that the first laser which can not work normally generates uncontrolled laser light, thereby affecting the normal work of the module, the first laser is switched off.

Step S503, adjusting the bias current of the second laser to change the output power of the second laser.

This step is used to adjust the bias current of the second laser to change the output power of the second laser.

Under the condition that the first laser cannot work normally, the second laser needs to provide the laser light which needs to be provided by the two original lasers, so that the bias current of the second laser needs to be adjusted to obtain enough output power.

The present application provides a method of using the present PSM4 optical module. Please refer to fig. 6, which is a flowchart of an embodiment of the present application using the optical module. This embodiment, the fourth embodiment of the present application. The fourth embodiment is used for explaining a use method of the optical module provided by the present application in a case where the second laser cannot be normally used. A fourth embodiment of the present application will be described in detail below with reference to fig. 6. The method comprises the following steps:

step S601, configuring the first optical switch, and switching the optical path of the first laser to a second output port of the first optical switch.

This step is used to configure the first optical switch, and switch the optical path of the first laser to the second output port of the first optical switch.

Taking fig. 3 as an example, a first laser of the present application, i.e., the laser 1 in fig. 3, a first optical switch of the present application, i.e., the upper optical switch in fig. 3, a second laser of the present application, i.e., the laser 2 in fig. 3, and a second output port of the first optical switch of the present application, i.e., the output port B in fig. 3. In fig. 3, when the laser 2 cannot be normally used, the first optical switch is configured to switch the optical path of the first laser to the second output port of the first optical switch, and in this case, the optical path transmission path 1 of the first laser corresponds to: the optical switch comprises a laser 1, a port B of a first optical switch, an optical splitter 3 and the optical splitter 1, wherein an optical path transmission channel 2 of the second laser is as follows: a laser 1, a port B of a first optical switch, an optical splitter 3 and an optical splitter 2; at this time, port a of the first optical switch does not output laser light.

Step S602, turning off the second laser.

This step is used to turn off the second laser.

In order to avoid that the second laser which can not work normally generates uncontrolled laser light, thereby affecting the normal work of the module, the second laser is switched off.

Step S603, adjusting the bias current of the first laser to change the output power of the first laser.

This step is used to adjust the bias current of the first laser to change the output power of the first laser.

In the case that the second laser cannot work normally, the first laser needs to provide the laser light that the two lasers originally need to provide, so that the bias current of the first laser needs to be adjusted to obtain a sufficient output power.

The present application provides a method of using the coherent optical module of the present application. Please refer to fig. 9, which is a flowchart of an embodiment of a method for using a coherent optical module according to the present application. In this embodiment, that is, the fifth embodiment of the present application describes a method for using the coherent optical module when both the first laser and the second laser can operate normally. A fifth embodiment of the present application will be described in detail below with reference to fig. 9. The method comprises the following steps:

step S901, configuring the first optical switch, and switching the optical path of the first laser to a first output port of the first optical switch.

Taking fig. 8 as an example, a first optical switch having a port a and a port B is configured to switch the optical path of the first laser light to the first output port of the first optical switch, and the optical path is switched to the first output port a of the first optical switch, where the port B does not output laser light.

At this time, the output light of the port a is divided into two paths after passing through the optical splitter 1, wherein one path is used as signal light and is output to generate a transmitting signal 1 after passing through the modulator, and the other path is used as local oscillation light and is used for performing coherent reception with the receiving signal 1.

Step S902, configuring the second optical switch, and switching the optical path of the second laser to a second output port of the second optical switch.

Taking fig. 8 as an example, a second optical switch having a port C and a port D is configured to switch the optical path of the second laser light to the second output port of the second optical switch, and the optical path is switched to the second output port D of the second optical switch, where the port C does not output laser light.

At this time, the output light of the port D is divided into two paths after passing through the optical splitter 2, wherein one path is used as signal light and is output to generate a transmitting signal 2 after passing through the modulator, and the other path is used as local oscillation light for coherent reception with the receiving signal 2.

The present application provides a method of using a coherent optical module. Please refer to fig. 10, which is a flowchart of an embodiment of a method for using a coherent optical module according to the present application. This embodiment is the sixth embodiment of the present application. The sixth embodiment is used to explain a method for using the coherent optical module based on the optical switch and the optical splitter provided in the present application when the first laser cannot be used normally. The following describes an embodiment of a coherent optical module based on an optical switch and an optical splitter in detail with reference to fig. 10. The method comprises the following steps:

step S1001, configuring the second optical switch, and switching the optical path of the second laser to a first output port of the second optical switch.

Taking fig. 8 as an example, switching the optical path of the second laser light to the first output port of the second optical switch is to configure the second optical switch having a port C and a port D, so that the first output port C of the second optical switch outputs laser light, and the port D does not output laser light.

At this time, the light is divided into two paths by the middle optical splitter 3, the upper path light is divided into two paths after passing through the optical splitter 1, one path is used as signal light and is output to generate a transmitting signal 1 after passing through the modulator, and the other path is used as local oscillation light and is used for carrying out coherent reception with the receiving signal 1; the downlink light is divided into two paths after passing through the optical splitter 2, wherein one path is used as signal light and is output to generate a transmitting signal 2 after passing through the modulator, and the other path is used as local oscillation light and is used for carrying out coherent reception with the receiving signal 2.

Step S1002, turning off the first laser.

This step is used to turn off the first laser.

In case the first laser cannot be used normally, the first laser needs to be switched off in order to avoid being affected by the uncontrolled laser light emitted by the first laser.

Taking fig. 8 as an example, the laser 1 is switched off.

Step S1003, adjusting the bias current of the second laser to change the output power of the second laser.

In case of a problem with the first laser, the second laser needs to provide the laser light that originally needs to be provided by two lasers, and thus the bias current of the second laser needs to be adjusted to obtain a sufficiently large output power of the second laser.

Taking fig. 8 as an example, the bias current of the laser 2 is adjusted to change the output power of the laser 2.

The present application provides a method of using a coherent optical module. Please refer to fig. 11, which is a flowchart illustrating an embodiment of a method for using a coherent optical module according to the present application. This embodiment is the seventh embodiment of the present application. The seventh embodiment is used to explain a method for using the coherent optical module provided in the present application in a situation where the second laser cannot be used normally. The following describes an embodiment of a coherent optical module based on an optical switch and an optical splitter in detail with reference to fig. 11. The method comprises the following steps:

step S1101, configuring the first optical switch, and switching the optical path of the first laser to a second output port of the first optical switch.

Taking fig. 8 as an example, switching the optical path of the first laser light to the second output port of the first optical switch is to configure the first optical switch having the port a and the port B, so that the second output port B of the first optical switch outputs laser light, and the port a does not output laser light.

Step S1102, turning off the second laser.

This step is used to turn off the second laser.

In case the second laser cannot be used normally, the second laser needs to be switched off in order to avoid being affected by the uncontrolled laser light emitted by the second laser.

Taking fig. 8 as an example, the laser 2 is switched off.

Step S1103, adjusting a bias current of the first laser to change an output power of the first laser.

In the case of a problem with the second laser, the first laser needs to provide the laser light that originally needs to be provided by two lasers, and thus the bias current of the first laser needs to be adjusted to obtain a sufficiently large output power of the first laser.

Taking fig. 8 as an example, the bias current of the laser 1 is adjusted to change the output power of the laser 1.

An eighth embodiment of the present application provides an optical module. Please refer to fig. 12, which is a flowchart of an eighth embodiment of the present application. The eighth embodiment of the present application will be described in detail below with reference to fig. 12. The implementation method of the optical module comprises the following steps:

step 1201, comprising: the optical waveguide comprises a first laser, a second laser, a first optical splitter, a second optical splitter, a third optical splitter and an optical waveguide.

This step is used for providing the composition structure of the optical module, namely includes: the optical waveguide comprises a first laser, a second laser, a first optical splitter, a second optical splitter, a third optical splitter and an optical waveguide.

Please refer to fig. 13, which is a schematic diagram of an optical module according to an eighth embodiment of the present application.

Step 1202, the first laser is connected with a first input port of the third optical splitter through an optical waveguide.

This step is used to provide connection information for the first laser. See laser 1 in fig. 13.

Step 1203, the second laser is connected to the second input port of the third optical splitter through an optical waveguide.

This step is used to provide connection information for the second laser. See laser 2 in fig. 13.

In step 1204, two output ports of the third optical splitter are respectively connected to the first input port of the first optical splitter and the first input port of the second optical splitter through optical waveguides.

This step is used to provide information for the third splitter.

Please refer to the beam splitter 3, the beam splitter 1, and the beam splitter 2 in fig. 13.

Step 1205, the first optical splitter and the second optical splitter are both provided with two output ports, and optical waveguides connected to the output ports provide optical signals.

This step is used to provide information for the first and second splitters. Please refer to fig. 13.

By adopting the optical module provided by the application, any one of the laser 1 and the laser 2 can be used in normal work, and if one of the lasers can not work normally, the other laser can be started to quickly recover the path.

The optical module provided by this embodiment further includes four modulators, and the four modulators are respectively connected to the four output ports of the first optical splitter and the second optical splitter through optical waveguides.

The optical module provided by this embodiment further includes two modulators and two coherent receivers, where the two modulators are respectively connected to the two output ports of the first optical splitter and the second optical splitter through optical waveguides, and the two coherent receivers are respectively connected to the two output ports of the first optical splitter and the second optical splitter through optical waveguides.

A ninth embodiment of the present application provides a data center system, including at least two optical modules and at least two switches;

the optical module is used for communication between the switches.

A tenth embodiment of the present application provides an optical module, including: the optical switch comprises a first laser, a second laser, a first optical switch, a second optical switch, a first optical splitter, a second optical splitter, a third optical splitter and an optical waveguide;

This embodiment is similar to the first embodiment except that the first splitter has only one input port and the second splitter has only one input port.

Although the present application has been described with reference to the preferred embodiments, it is not intended to limit the present application, and those skilled in the art can make variations and modifications without departing from the spirit and scope of the present application, therefore, the scope of the present application should be determined by the claims that follow.

Claims

1. A light module, comprising: the optical switch comprises a first laser, a second laser, a first optical switch, a second optical switch, a first optical splitter, a second optical splitter, a third optical splitter and an optical waveguide;

2. The optical module of claim 1, wherein the first and second optical switches are one input port and two output port optical switches.

3. The optical module of claim 1, further comprising four modulators respectively connected to the four output ports of the first optical splitter and the second optical splitter by optical waveguides.

4. The optical module of claim 1, wherein the optical module is an optical module that employs four-way parallel channels for multiplexing.

5. The optical module of claim 1, wherein the optical module is a coherent optical module.

6. An optical module according to claim 5, characterized in that it further comprises two modulators and two coherent receivers, a first modulator being connected to the first output port of the first optical splitter by means of an optical waveguide, a first coherent receiver being connected to the second output port of the first optical splitter by means of an optical waveguide, a second modulator being connected to the second output port of the second optical splitter by means of an optical waveguide, and a second coherent receiver being connected to the first output port of the second optical splitter by means of an optical waveguide.

7. A light module, comprising: the optical waveguide comprises a first laser, a second laser, a first optical splitter, a second optical splitter, a third optical splitter and an optical waveguide;

8. The optical module of claim 7, further comprising four modulators respectively connected to the four output ports of the first optical splitter and the second optical splitter by optical waveguides.

9. The optical module of claim 7, further comprising two modulators respectively connected to the two output ports of the first optical splitter and the second optical splitter through optical waveguides, and two coherent receivers respectively connected to the two output ports of the first optical splitter and the second optical splitter through optical waveguides.

10. A data center system comprises at least two optical modules and at least two switches;

the first optical switch and the second optical switch are respectively arranged on optical output paths of the first laser and the second laser;

the optical module is used for communication between the switches.

11. A light module, comprising: the optical switch comprises a first laser, a second laser, a first optical switch, a second optical switch, a first optical splitter, a second optical splitter, a third optical splitter and an optical waveguide;

12. A light module, comprising: the optical switch comprises a first laser, a second laser, a first optical switch, a second optical switch, a first optical splitter, a second optical splitter and a third optical splitter;