CN218549928U - Optical module and optical communication system - Google Patents

Abstract

The application discloses an optical module and an optical communication system, which relate to the technical field of optical devices and are used to solve the problem of high manufacturing cost caused by too many devices in a traditional optical module. The optical module includes: a light receiving component, a limiting amplifying circuit connected to the light receiving component, a light emitting component, a driving circuit connected to the light emitting component, and a controller connected to the driving circuit; wherein, the limiting amplifying circuit and the driving circuit is directly connected. The optical module is applied to the transmission of optical signals.

Description

Optical module and optical communication system

technical field

The present application relates to the technical field of optical devices, in particular to an optical module and an optical communication system.

Background technique

An optical module is an important component of photoelectric conversion in an optical communication system, usually including a receiving channel and a transmitting channel. Among them, the receiving channel is composed of photodetectors, transimpedance amplifiers, impedance matching circuits, limiting amplifier circuits and electrical signal output interface circuits; the transmitting channel is composed of electrical signal input interface circuits, laser drive circuits, impedance matching circuits and light emitting components.

The optical module can sequentially process the collected optical signal through the above-mentioned components inside it, and send the processed optical signal to the next section of optical fiber for further transmission. However, because there are too many devices in the traditional optical module, the manufacturing cost is too high.

Utility model content

The present application provides an optical module and an optical communication system, which are used to solve the problem of high manufacturing cost caused by too many components in a traditional optical module.

In order to achieve the above object, the application adopts the following technical solutions:

In the first aspect, an embodiment of the present application provides an optical module, the optical module includes: a light receiving component, a limiting amplifier circuit connected to the light receiving component, a light emitting component, a driving circuit connected to the light emitting component, and a A controller connected to the driving circuit; wherein, the limiting amplifier circuit is directly connected to the driving circuit.

With reference to the first aspect, in a realizable implementation manner, the above-mentioned optical module may further include: a first clock data recovery circuit connected to the above-mentioned limiting amplifier circuit, and a first clock-data recovery circuit connected to the above-mentioned driving circuit. a connected second clock data recovery circuit;

Wherein, both the first clock data recovery circuit and the second clock data recovery circuit are used to recover the clock of the optical signal, and the optical signal is: the optical signal received by the above optical receiving component and processed by the limiting amplifier circuit .

With reference to the first aspect, in a feasible implementation manner, the above-mentioned optical module may further include: a first switch component connected in parallel with the first clock data recovery circuit, and a second switch component connected in parallel with the second clock data recovery circuit A switch component; the first switch component is connected to the second switch component; wherein, the first switch component is used to control the disconnection or connection of the first clock data recovery circuit and the above-mentioned limiting amplifier circuit; the second switch component is used to control the second clock The data recovery circuit is disconnected or connected to the above driving circuit.

With reference to the first aspect, in an implementable manner, both the control terminal of the first switch component and the control terminal of the second switch component are connected to the above-mentioned controller; wherein, the controller controls the first switch component to close or disconnecting, controlling the disconnection or connection of the first clock data recovery circuit with the above-mentioned limiting amplifier circuit; and controlling the disconnection or connection of the second clock data recovery circuit with the above-mentioned driving circuit by controlling the closing or opening of the second switch assembly.

In combination with the first aspect, in a realizable implementation manner, the above-mentioned optical module may further include a housing on which a dial switch is arranged; the control end of the first switch assembly and the control end of the second switch assembly are connected to the The dial switch is connected; wherein, the dial switch controls the first clock data recovery circuit to be disconnected or connected to the above-mentioned limiting amplifier circuit by controlling the first switch assembly to be closed or disconnected; and controls the second switch assembly to be closed or disconnected. On, to control the second clock data recovery circuit to be disconnected or connected to the above-mentioned drive circuit.

With reference to the first aspect, in a practicable implementation manner, the above-mentioned optical module may further include a power supply component, wherein the power supply component is used to supply power to the above-mentioned limiting amplifier circuit, driving circuit and controller.

With reference to the first aspect, in a practicable implementation manner, the above-mentioned optical module may further include a casing, and the above-mentioned power supply component is disposed on the casing.

With reference to the first aspect, in a practicable implementation manner, the aforementioned power supply component may be a battery power supply component or a solar power supply component.

With reference to the first aspect, in an implementable manner, the foregoing optical module may be a relay optical module.

In a second aspect, the present invention provides an optical communication system, including the optical module described in the above first aspect or various possible implementation manners thereof.

The embodiment of the present application provides an optical module and an optical communication system. Since the limiting amplifier circuit in the optical module can be directly connected to the drive circuit, the limiting amplifier circuit can be directly used as an electrical signal input interface circuit in a traditional optical module. , and the drive circuit is directly used as the electrical signal output interface circuit in the traditional optical module, so there is no need to additionally set up a special electrical signal input interface circuit and an electrical signal output interface circuit in the optical module, thereby saving the manufacturing cost of the optical module.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or related technologies. Obviously, the accompanying drawings in the following description are only For some embodiments of the application, those skilled in the art can also obtain other drawings based on these drawings without creative work.

FIG. 1 is one of the structural schematic diagrams of the optical module provided by the embodiment of the present application;

Fig. 2 is the second structural schematic diagram of the optical module provided by the embodiment of the present application;

Fig. 3 is the third structural schematic diagram of the optical module provided by the embodiment of the present application;

FIG. 4 is a fourth schematic structural diagram of an optical module provided by an embodiment of the present application.

Reference signs:

11-light receiving component; 12-limiting amplifier circuit; 13-light emitting component; 14-drive circuit; 15-controller; 16-first clock data recovery circuit; 17-second clock data recovery circuit; 18-th A switch assembly; 19-second switch assembly; 20-housing; 21-dip switch.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

In the description of this application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", The orientations or positional relationships indicated by "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the application and simplifying the description, rather than indicating or implying References to devices or elements must have a particular orientation, be constructed, and operate in a particular orientation and therefore should not be construed as limiting the application.

In the description of the present application, the terms "first" and "second" are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Thus, a feature defined as "first" or "second" may be used to explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise stated, "plurality" means two or more.

In the description of this application, it should be noted that unless otherwise specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated Ground connection; it can be a mechanical connection; it can be a direct connection, it can also be an indirect connection through an intermediary, and it can also be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.

In long-distance optical communication, due to the loss and dispersion of light, the energy of the optical signal will be reduced and the optical pulse will be broadened. Therefore, a repeater must be installed at a certain distance to amplify and regenerate the optical signal and send it The input fiber continues to transmit. The traditional repeater is an optical-electrical-optical repeater. Its working principle is to convert the received weak optical signal into an electrical signal through a photoelectric detector, and then amplify, equalize, and judge the electrical signal. Regeneration processing, and finally the processed electrical signal is converted into an optical signal by a semiconductor laser and sent to the next section of optical fiber. A repeater usually consists of three parts: optical receiver, timing decision circuit, optical transmitter, and auxiliary equipment such as remote power supply receiving, remote control, and telemetry. Its structure is complex and its manufacturing cost is high.

In view of this, optical amplifiers came into being. Optical amplifiers can directly amplify optical signals without photoelectric conversion. They are highly transparent to the format and rate of signals, making the entire optical communication system simpler and more flexible. Optical amplifiers typically include:

1. Optical fiber amplifier

Optical fiber amplifiers are doped with rare earth ions (such as erbium, praseodymium, thulium, etc.) in the optical fiber as laser active substances, and the gain bandwidth of each dopant is different. The gain band of the erbium-doped fiber amplifier is wide, covering the S, C, and L frequency bands; the gain band of the thulium-doped fiber amplifier is the S-band; the gain band of the praseodymium-doped fiber amplifier is around 1310nm. Optical fiber amplifiers usually include rare-earth-doped optical fibers, pump lasers, and optical combiners, and the layout structure is relatively complicated.

2. Raman optical amplifier

The Raman optical amplifier is an optical amplifier made by using the Raman scattering effect. After the high-power laser is injected into the optical fiber, nonlinear effect Raman scattering will occur. In the process of continuous scattering, the energy is transferred to the optical signal, so that the optical signal is amplified. Raman amplification is a distributed amplification process, that is, it gradually amplifies along the entire line, and its working bandwidth is wide, but the cost is high.

3. Semiconductor optical amplifier

Semiconductor optical amplifiers generally refer to traveling wave optical amplifiers, and their working principle is similar to that of semiconductor lasers. Its working bandwidth is wide but its gain range is small, making it difficult to manufacture.

For medium and short-distance communications where the communication quality requirements are not too high, using repeaters, optical amplifiers or even laying new transmission fibers can solve the problems of increased optical power loss and poor optical signal quality of transmission lines caused by line aging, but Both have the disadvantages of high cost and troublesome construction. In view of this, optical modules can be used instead of repeaters or optical amplifiers. Traditional optical modules usually include a receiving channel and a transmitting channel.

Among them, the receiving channel is composed of a photodetector, a transimpedance amplifier, an impedance matching circuit, a limiting amplifier circuit and an electrical signal output interface circuit; the working principle of the receiving channel is: the photodetector converts the collected optical signal into a proportional The transimpedance amplifier converts the electrical signal into a voltage signal, amplifies the converted voltage signal to the required amplitude, and transmits it to the limiting amplifier circuit through the impedance matching circuit to complete the amplification and shaping of the signal again, so as to improve Improve the signal-to-noise ratio, reduce the bit error rate, and finally complete the signal output through the electrical output interface circuit. The above-mentioned transmission channel is composed of an electrical signal input interface circuit, a laser drive circuit, an impedance matching circuit and an optical transmission component; the working principle of the transmission channel is: the electrical signal is input through the electrical interface of the transmission channel, and the coupling of the electrical signal is completed through the electrical input interface circuit. Then it is modulated by the laser drive circuit, and then impedance matched by the impedance matching circuit to complete the modulation and drive of the signal, and finally sent to the optical emission component (mainly including lasers, etc.) to convert the electrical signal into an optical signal for optical signal transmission.

However, because there are too many devices in the traditional optical module, the manufacturing cost of the optical module is too high.

In order to solve this problem, in the optical module provided by the embodiment of the present application, the limiting amplifier circuit can be directly connected to the driving circuit, that is, the limiting amplifier circuit can be directly used as the electrical signal input interface circuit in the traditional optical module, and the The driving circuit is directly used as the electrical signal output interface circuit in the traditional optical module. In this way, since there is no need to additionally provide a special electrical signal input interface circuit and an electrical signal output interface circuit in the optical module, the manufacturing cost of the optical module can be saved.

FIG. 1 shows a possible structural diagram of an optical module provided by an embodiment of the present application. As shown in Figure 1, the optical module provided by the embodiment of the present application may include: a light receiving component 11, a limiting amplifier circuit 12 connected to the light receiving component 11, a light emitting component 13, and a driving circuit 14 connected to the light emitting component 13 , and a controller 15 connected to the driving circuit 14.

Among them, the limiting amplifier circuit 12 is directly connected to the driving circuit 14 .

In the embodiment of the present application, the limiting amplifier circuit 12 may be used to modulate the first voltage signal. Wherein, the first voltage signal is a voltage signal obtained after the light receiving component 11 converts the collected light signal.

In the embodiment of the present application, the controller 15 may be configured to configure a driving current for the driving circuit 14, so that the driving circuit 14 drives the light emitting component 13 to emit an optical signal of a certain optical power.

For a specific description of configuring the drive current for the controller 15, reference may be made to relevant descriptions in the related art, and in order to avoid repetition, details are not repeated here.

Optionally, in the embodiment of the present application, the foregoing optical module may be a relay optical module, and the relay optical module may serve as a relay to relay and transmit optical signals.

Optionally, the optical module provided in the embodiment of the present application may also include a printed circuit board

(Printed Circuit Board, PCB). Wherein, the above-mentioned limiting amplifier circuit 12, driving circuit 14 and controller 15 may all be arranged on the PCB.

Optionally, in the embodiment of the present application, both the light receiving component 11 and the light emitting component 13 may be connected to the PCB through a flexible circuit board (ie, FPC).

Optionally, in the embodiment of the present application, an impedance matching circuit may be disposed on the above-mentioned flexible circuit board. The impedance matching circuit can be used to perform impedance matching on electrical signals.

Optionally, in the embodiment of the present application, the above-mentioned light receiving component 11 may include a photodetector, and a transimpedance amplifier (Trans-Impedance Amplifier, TIA) connected to the photodetector. Wherein, the TIA is connected to the above-mentioned limiting amplifier circuit 12 .

Optionally, in the embodiment of the present application, the light emitting component 13 may include a laser. The laser can be used to emit an optical signal.

Optionally, in the embodiment of the present application, the above-mentioned driving circuit 14 may specifically be a laser driving circuit, and the laser driving circuit may be used to drive the above-mentioned laser to emit an optical signal with a certain optical power.

The working principle of the optical module provided by the embodiment of the present application will be described in detail below.

Optionally, in the embodiment of the present application, the photodetector in the light receiving component 11 can receive the light signal, and convert the light signal into an electrical signal proportionally, and then transmit the electrical signal to the light receiving component 11. TIA, the electrical signal is converted into a voltage signal by the TIA, and the converted voltage signal is amplified to the required amplitude to obtain the first voltage signal; then, the first voltage signal is transmitted to the above-mentioned impedance matching circuit, and the first voltage signal It can be transmitted to the limiting amplifier circuit 12 after performing impedance matching by the above-mentioned impedance matching circuit, so as to complete the re-amplification and shaping of the first voltage signal; after that, the modulated first voltage signal can be transmitted to the driving circuit 14 to complete the electric circuit. Signal coupling, the coupled first voltage signal is driven by the driving circuit 14, and after impedance matching is performed by the impedance matching circuit, it is transmitted to the light-emitting component 13; finally, the light-emitting component 13 can retransmit the received electrical signal It is converted into an optical signal of a certain optical power, and the optical signal of this optical power is sent to the next section of optical fiber for transmission.

Optionally, in the embodiment of the present application, referring to FIG. 1, as shown in FIG. 2, the optical module provided in the embodiment of the present application may further include: a first clock data recovery circuit 16 connected to the limiting amplifier circuit 12, and a Both the first clock data recovery circuit 16 and the driving circuit 14 are connected to the second clock data recovery circuit 17 .

Wherein, the first clock data recovery circuit 16 and the second clock data recovery circuit 17 are both used for clock recovery of the optical signal, the optical signal is: received by the optical receiving component 11 and processed by the limiting amplifier circuit 12 light signal.

Optionally, in the embodiment of the present application, the first clock data recovery circuit 16 and the second clock data recovery circuit 17 may be clock data recovery circuits (Clock and Data Recovery, CDR) in existing high-speed optical modules.

In the embodiment of the present application, since the first clock data recovery circuit and the second clock data recovery circuit can extract the clock signal from the input optical signal, and find out the phase relationship between the clock signal and the data of the optical signal, that is, Clock recovery is performed on the optical signal to eliminate the jitter of the optical signal, so the loss of the optical signal on the wiring and the connector can be compensated, thereby meeting the transmission requirements of the high-speed optical signal.

Optionally, in the embodiment of the present application, referring to FIG. 2, as shown in FIG. 3, the optical module provided in the embodiment of the present application may further include: a first switch assembly 18 connected in parallel with the first clock data recovery circuit 16, and The second switch component 19 connected in parallel with the second clock data recovery circuit 17 ; the first switch component 18 is connected with the second switch component 19 .

Wherein, the first switch assembly 18 is used to control the first clock data recovery circuit 16 to disconnect or connect to the limiting amplifier circuit 12; the second switch assembly 19 is used to control the second clock data recovery circuit 17 to disconnect or connect to the drive circuit 14. connect.

Optionally, in the embodiment of the present application, both the first switch component 18 and the second switch component 19 may be single-pole double-throw switches.

Optionally, in this embodiment of the application, the above-mentioned optical module can control the first clock data recovery circuit 16 to disconnect or connect to the limiting amplifier circuit 12 by controlling the first switch assembly 18 to close or open; and by controlling the second The switch component 19 is closed or opened, and controls the second clock data recovery circuit 17 to be disconnected or connected to the drive circuit 14 .

The specific method of controlling the first switch assembly 18 to be closed or opened and the second switch assembly 19 to be closed or opened by the optical module provided by the embodiment of the present application will be described in detail below.

Optionally, in the embodiment of the present application, the above-mentioned optical module may control the closing or opening of the first switch component 18 and the second switch component 19 through at least one of the following ways 1 and 2.

method one

Optionally, in this embodiment of the present application, as shown in FIG. 3 , both the control terminal a of the first switch component 18 and the control terminal b of the second switch component 19 are connected to the controller 15 .

Wherein, the controller 15 controls the first clock data recovery circuit 16 to disconnect or connect with the limiting amplifier circuit 12 by controlling the first switch assembly 18 to close or open; and controls the second switch assembly 19 to close or open to control The second clock data recovery circuit 17 is disconnected or connected to the drive circuit 14 .

Specifically, the controller 15 can control the first clock data recovery circuit 16 to disconnect from the limiting amplifier circuit 12 by controlling the first switch component 18 to close; or, by controlling the first switch component 18 to open, control the first clock data The recovery circuit 16 is connected to the limiting amplifier circuit 12 . The controller 15 can control the second clock data recovery circuit 17 to disconnect from the drive circuit 14 by controlling the second switch component 19 to close; or, by controlling the second switch component 19 to open, control the second clock data recovery circuit 17 to disconnect from the drive circuit Circuit 14 is connected.

In the embodiment of the present application, since the controller 15 can control the first clock data recovery circuit 16 to disconnect or connect to the limiting amplifier circuit 12 by controlling the first switch assembly 18 to close or open; and by controlling the second switch assembly 19 Closed or disconnected, control the second clock data recovery circuit 17 to disconnect or connect with the drive circuit 14; therefore, it is possible to control whether the above optical module is connected to the clock data recovery circuit through the first switch component 18 and the second switch component 19, Therefore, the optical module can be adapted to different optical communication scenarios.

way two

Optionally, in the embodiment of the present application, in conjunction with FIG. 3 , as shown in FIG. 4 , the optical module provided in the embodiment of the present application may further include a housing 20 on which a dial switch 21 is arranged; the first switch assembly 18 Both the control terminal a and the control terminal b of the second switch assembly 19 are connected to the dial switch 21 .

Wherein, the dial switch 21 controls the first clock data recovery circuit 16 to disconnect or connect with the limiting amplifier circuit 12 by controlling the first switch assembly 18 to close or open; and by controlling the second switch assembly 19 to close or open, The second clock data recovery circuit 17 is controlled to be disconnected or connected to the drive circuit 14 .

Specifically, the dial switch 21 can control the first clock data recovery circuit 16 to disconnect from the limiting amplifier circuit 12 by controlling the first switch assembly 18 to close; or, by controlling the first switch assembly 18 to open, control the first clock The data recovery circuit 16 is connected to the limiting amplifier circuit 12 . The dial switch 21 can control the second clock data recovery circuit 17 to disconnect from the drive circuit 14 by controlling the second switch component 19 to close; or, by controlling the second switch component 19 to open, control the second clock data recovery circuit 17 to disconnect from The drive circuit 14 is connected.

Optionally, in this embodiment of the present application, the dip switch 21 may be powered by the controller 15 .

Optionally, in the embodiment of the present application, as shown in FIG. 4, the control terminal a of the first switch assembly 18 and the control terminal b of the second switch assembly 19 can both be connected to the fixed terminal c of the dial switch 21; The free terminal d of the switch 21 is connected to the high level (ie 3.3V) through the pull-up resistor 22 , and the free terminal e of the dial switch 21 is connected to the low level (ie GND) through the pull-down resistor 23 .

Optionally, in the embodiment of the present application, if the dial switch 21 outputs a high level, the first switch component 18 can be controlled to be disconnected, the first clock data recovery circuit 16 can be connected to the limiting amplifier circuit 12, and the Control the second switch assembly 19 to disconnect, and control the second clock data recovery circuit 17 to be connected to the drive circuit 14; the first clock data recovery circuit 16 and the second clock data recovery circuit 17 are connected to the circuit (ie, the circuit 1 in Fig. 4 conduction). If the dial switch 21 outputs a low level, the first clock data recovery circuit 16 is controlled to be disconnected from the limiting amplifier circuit 12 by controlling the first switch assembly 18 to be closed, and the second switch assembly 19 is controlled to be closed to control the first clock data recovery circuit 16 to be disconnected. The second clock data recovery circuit 17 is disconnected from the driving circuit 14; that is, the first clock data recovery circuit 16 and the second clock data recovery circuit 17 are prohibited from accessing the circuit (ie, the line 2 in FIG. 4 is turned on).

In the embodiment of the present application, since the above-mentioned optical module can also control the on-off of the first switch component 18 and the second switch component 19 through the dial switch 21, and then control whether to access the clock data recovery circuit, it can improve the control of the first switch. The on-off flexibility of the component 18 and the second switch component 19 enables the optical module to adapt to different optical communication scenarios.

Optionally, the optical module provided in the embodiment of the present application may further include a power supply component. Wherein, the power supply component can be used to supply power to the limiting amplifier circuit 12 , the driving circuit 14 and the controller 15 .

Optionally, in the embodiment of the present application, a golden finger may also be provided on the above-mentioned PCB, and the above-mentioned power supply component can supply power to the limiting amplifier circuit 12 , the driving circuit 14 and the controller 15 through the golden finger.

Optionally, in the embodiment of the present application, the aforementioned power supply component may be a battery power supply component. The power supply component can be arranged inside the optical module, also can be arranged on the housing 20 of the optical module, and can also be arranged outside the optical module and connected with the optical module. Specifically, it can be set according to actual usage requirements, and is not limited in this embodiment of the application.

Optionally, in the embodiment of the present application, the above-mentioned power supply component may be a solar power supply component. The power supply component can be arranged on the housing 20 of the optical module, or can be arranged outside the optical module and connected with the optical module. Specifically, it can be set according to actual usage requirements, and is not limited in this embodiment of the application.

In the optical module provided in the embodiment of the present application, since the limiting amplifying circuit can be directly connected to the driving circuit, the limiting amplifying circuit can be directly used as an electrical signal input interface circuit in a traditional optical module, and the driving circuit can be directly connected As an electrical signal output interface circuit in a traditional optical module, there is no need to additionally provide a special electrical signal input interface circuit and an electrical signal output interface circuit in the optical module, thereby saving the manufacturing cost of the optical module.

The embodiment of the present application also provides an optical communication system, which may include the optical module described in the above embodiments, and the light receiving component 11 and the light transmitting component 13 of the optical module are respectively connected to the transmission optical fiber in the optical communication system.

The optical communication system can realize the transparent transmission of converting the input optical signal into an electrical signal and then converting the electrical signal into an optical signal through structures such as the optical receiving component 11, the limiting amplifier circuit 12, the optical transmitting component 13, and the driving circuit 14. At the same time, the controller 15 can configure the driving current for the driving circuit 14, so that the driving circuit 14 drives the light emitting component 13 to emit an optical signal with a certain optical power, so as to ensure that the emitted optical signal meets the optical power requirement. In occasions where optical power needs to be increased, functions similar to repeaters and optical amplifiers can be realized. And, since the limiting amplifying circuit 12 can be directly used as the electrical signal input interface circuit in the traditional optical module, and the driving circuit 14 can be directly used as the electrical signal output interface circuit in the traditional optical module, there is no need to additionally set a special circuit in the optical module. The electrical signal input interface circuit and the electrical signal output interface circuit can save the layout cost of the optical communication system.

For the specific description of the structure, connection relationship, and working principle of each component in the optical module, refer to the relevant description in the above optical module embodiment, and to avoid repetition, details are not repeated here.

In the description of this specification, specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in an appropriate manner.

The above is only the specific implementation of the application, but the scope of protection of the application is not limited thereto. Any changes or substitutions that can be easily imagined by those skilled in the art within the technical scope disclosed in the application should be covered within the scope of protection of this application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims (10)

1. A light module, characterized in that the light module comprises: the device comprises a light receiving component, an amplitude limiting amplifying circuit connected with the light receiving component, a light emitting component, a driving circuit connected with the light emitting component, and a controller connected with the driving circuit;

wherein, the amplitude limiting amplifying circuit is directly connected with the driving circuit.

2. The light module of claim 1, further comprising: the first clock data recovery circuit is connected with the amplitude limiting amplifying circuit, and the second clock data recovery circuit is connected with the first clock data recovery circuit and the driving circuit;

the first clock data recovery circuit and the second clock data recovery circuit are both used for carrying out clock recovery on optical signals, and the optical signals are: and the optical signal is received by the optical receiving component and processed by the amplitude limiting amplifying circuit.

3. The light module of claim 2, further comprising: a first switching element connected in parallel with the first clock data recovery circuit, and a second switching element connected in parallel with the second clock data recovery circuit; the first switch assembly is connected with the second switch assembly;

the first switch component is used for controlling the first clock data recovery circuit to be disconnected or connected with the amplitude limiting amplification circuit; the second switch component is used for controlling the second clock data recovery circuit to be disconnected or connected with the driving circuit.

4. The light module of claim 3, wherein the control terminal of the first switch assembly and the control terminal of the second switch assembly are both connected to the controller;

the controller controls the first clock data recovery circuit to be disconnected or connected with the amplitude limiting amplification circuit by controlling the first switch component to be closed or opened; and controlling the second clock data recovery circuit to be disconnected or connected with the driving circuit by controlling the second switch component to be closed or opened.

5. The light module of claim 3 or 4, further comprising a housing, wherein a dial switch is disposed on the housing; the control end of the first switch component and the control end of the second switch component are both connected with the dial switch;

the dial switch controls the first switch component to be switched on or switched off, and controls the first clock data recovery circuit to be switched off or connected with the amplitude limiting amplification circuit; and controlling the second clock data recovery circuit to be disconnected or connected with the driving circuit by controlling the second switch component to be closed or opened.

6. The light module of claim 1, further comprising a power supply assembly;

the power supply assembly is used for supplying power to the amplitude limiting amplification circuit, the driving circuit and the controller.

7. The light module of claim 6, further comprising a housing, the power supply assembly being disposed on the housing.

8. The light module of claim 7, wherein the power supply assembly is a battery power supply assembly or a solar power supply assembly.

9. The optical module of claim 1, wherein the optical module is a relay optical module.

10. An optical communication system, characterized in that it comprises a light module according to any one of claims 1 to 9.

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