CN218549928U - Optical module and optical communication system - Google Patents

Abstract

The application discloses optical module and optical communication system relates to optical device technical field for solve the too much problem of the manufacturing cost that leads to of device among traditional optical module. The optical module includes: 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 drive circuit. The optical module is applied to transmission of optical signals.

Description

Optical module and optical communication system

Technical Field

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

Background

An optical module is an important component for implementing photoelectric conversion in an optical communication system, and generally includes a receiving channel and a transmitting channel. The receiving channel consists of a photoelectric detector, a trans-impedance amplifier, an impedance matching circuit, an amplitude limiting amplification circuit and an electric signal output interface circuit; the transmitting channel consists of an electric signal input interface circuit, a laser driving circuit, an impedance matching circuit and a light emitting component.

The optical module can process the collected optical signals through the devices in the optical module in sequence, and send the processed optical signals to the next section of optical fiber for continuous transmission. However, the conventional optical module has too many devices, which results in too high manufacturing cost.

SUMMERY OF THE UTILITY MODEL

The application provides an optical module and an optical communication system, which are used for solving the problem of overhigh manufacturing cost caused by excessive devices in the traditional optical module.

In order to achieve the purpose, the technical scheme is as follows:

in a first aspect, an embodiment of the present application provides an optical module, including: 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.

With reference to the first aspect, in an implementable implementation, the optical module may further include: a first clock data recovery circuit connected to the amplitude limiting amplifier circuit, and a second clock data recovery circuit connected to both the first clock data recovery circuit and the driving circuit;

the first clock data recovery circuit and the second clock data recovery circuit are used for performing clock recovery on an optical signal, and the optical signal is as follows: the optical signal received by the optical receiving component and processed by the amplitude limiting amplifying circuit.

With reference to the first aspect, in an implementable implementation, the optical module may further include: 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 component is connected with the second switch component; 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.

With reference to the first aspect, in an implementable embodiment, the control terminal of the first switch component and the control terminal of the second switch component are both connected to the controller; the controller controls the first clock data recovery circuit to be disconnected or connected with the amplitude limiting amplifying circuit by controlling the first switch component to be switched on or switched off; and the second clock data recovery circuit is controlled to be disconnected or connected with the driving circuit by controlling the second switch component to be switched on or switched off.

With reference to the first aspect, in an implementable implementation, the optical module may further include a housing, on which a dial switch is disposed; 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 the second clock data recovery circuit is controlled to be disconnected or connected with the driving circuit by controlling the second switch component to be switched on or switched off.

With reference to the first aspect, in an implementable implementation, the optical module may further include a power supply component; the power supply assembly is used for supplying power to the amplitude limiting amplification circuit, the driving circuit and the controller.

With reference to the first aspect, in an implementable embodiment, the optical module may further include a housing on which the power supply assembly is disposed.

With reference to the first aspect, in an implementable embodiment, the power supply module may be a storage battery power supply module or a solar power supply module.

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

In a second aspect, the present invention provides an optical communication system comprising an optical module as described in the first aspect or in various possible embodiments thereof.

The embodiment of the application provides an optical module and an optical communication system, because an amplitude limiting amplifying circuit in the optical module can be directly connected with a driving circuit, namely the amplitude limiting amplifying circuit can be directly used as an electric signal input interface circuit in a traditional optical module, and the driving circuit can be directly used as an electric signal output interface circuit in the traditional optical module, no special electric signal input interface circuit and special electric signal output interface circuit need to be additionally arranged in the optical module, and therefore the manufacturing cost of the optical module can be saved.

Drawings

In order to more clearly illustrate the embodiments of the present application or technical solutions in related arts, the drawings used in the description of the embodiments or related arts will be briefly described below, it is obvious that the drawings in the description below are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic structural diagram of an optical module according to an embodiment of the present application;

fig. 2 is a second schematic structural diagram of an optical module according to the embodiment of the present application;

fig. 3 is a third schematic structural diagram of an optical module according to an embodiment of the present application;

fig. 4 is a fourth schematic structural diagram of an optical module according to an embodiment of the present application.

Reference numerals:

11-a light receiving component; 12-a limiting amplification circuit; 13-a light emitting assembly; 14-a drive circuit; 15-a controller; 16-a first clock data recovery circuit; 17-a second clock data recovery circuit; 18-a first switch assembly; 19-a second switching assembly; 20-a housing; 21-dial switch.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.

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

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; may be a mechanical connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In long-distance optical communication, because optical loss and dispersion exist in light, energy of an optical signal is reduced, and an optical pulse is widened, so that a relay is required to be arranged at certain intervals to amplify and regenerate the optical signal, and the optical signal is sent to an optical fiber for continuous transmission. The traditional repeater is a photo-electro-optical repeater, and the working principle of the traditional repeater is that a received weak optical signal is converted into an electrical signal through a photoelectric detector, then the electrical signal is subjected to signal regeneration processing such as amplification, equalization, judgment and the like, and finally the processed electrical signal is converted into an optical signal through a semiconductor laser and is sent to the next section of optical fiber. A repeater is generally composed of an optical receiver, a timing decision circuit, an optical transmitter and auxiliary equipment for remote power supply receiving, remote control, remote measurement and the like, and is complex in structure and high in manufacturing cost.

In view of this, an optical amplifier is developed, which can directly amplify an optical signal without performing optical-to-electrical conversion, and has high transparency to the format and rate of the signal, so that the entire optical communication system is simpler and more flexible. The optical amplifier generally includes:

1. optical fiber amplifier

The optical fiber amplifier is formed by doping rare earth ions (such as erbium, praseodymium, thulium and the like) as laser active substances in an optical fiber, wherein the gain bandwidth of each dopant is different. The gain band of the erbium-doped fiber amplifier is wider and covers S, C, L frequency band; the gain band of the thulium-doped optical fiber amplifier is an S wave band; the gain band of the praseodymium doped fiber amplifier is around 1310 nm. The optical fiber amplifier usually comprises a rare earth doped optical fiber, a pump laser and an optical combiner, and the layout structure is complicated.

2. Raman optical amplifier

The raman optical amplifier is an optical amplifier manufactured by using a raman scattering effect. After the high-power laser is injected into the optical fiber, nonlinear effect Raman scattering can occur, and in the process of continuously generating scattering, energy is transferred to the optical signal, so that the optical signal is amplified. Raman amplification is a distributed amplification process, namely amplification is performed gradually along the whole line, and the working bandwidth is wide, but the cost is high.

3. Semiconductor optical amplifier

The semiconductor optical amplifier is generally a traveling wave optical amplifier, the working principle of which is similar to that of a semiconductor laser, the working bandwidth of which is wider but the gain amplitude is smaller, and the manufacturing difficulty is higher.

For medium-short distance communication with communication quality not too high, the problems of increased optical power loss and poor optical signal quality of a transmission line caused by line aging can be solved by using a repeater, an optical amplifier and even laying a new transmission optical fiber, but the problems of high cost and troublesome construction are all caused. In view of this, the repeater or optical amplifier can be replaced by an optical module, which conventionally comprises a receive channel and a transmit channel.

The receiving channel consists of a photoelectric detector, a trans-impedance amplifier, an impedance matching circuit, an amplitude limiting amplification circuit and an electric signal output interface circuit; the working principle of the receiving channel is as follows: the photoelectric detector converts the acquired optical signals into electric signals in proportion, the trans-impedance amplifier converts the electric signals into voltage signals again, the voltage signals obtained by conversion are amplified to a required amplitude, the voltage signals are transmitted to the amplitude limiting amplifying circuit through the impedance matching circuit to finish re-amplification and reshaping of the signals, so that the signal-to-noise ratio is improved, the error rate is reduced, and finally the signals are output through the electric output interface circuit. The transmitting channel consists of an electric signal input interface circuit, a laser driving circuit, an impedance matching circuit and a light emitting component; the working principle of the transmitting channel is as follows: the electric signal is input through the electric interface of the emission channel, the coupling of the electric signal is completed through the electric input interface circuit, then the electric signal is modulated through the laser driving circuit, the impedance matching is performed through the impedance matching circuit, the modulation and the driving of the signal are completed, and finally the electric signal is sent to the light emission component (mainly comprising a laser and the like) to be converted into the optical signal for optical signal transmission.

However, the manufacturing cost of the optical module is too high due to the excessive number of devices in the conventional optical module.

In order to solve the problem, in the optical module provided in the embodiment of the present application, the amplitude limiting amplification circuit may be directly connected to the driving circuit, that is, the amplitude limiting amplification circuit is directly used as an electrical signal input interface circuit in the conventional optical module, and the driving circuit is directly used as an electrical signal output interface circuit in the conventional optical module. Therefore, the optical module does not need to be additionally provided with a special electric signal input interface circuit and an electric signal output interface circuit, so that the manufacturing cost of the optical module can be saved.

Fig. 1 shows a schematic diagram of a possible structure of an optical module provided in an embodiment of the present application. As shown in fig. 1, an optical module provided in an embodiment of the present application may include: the optical receiver module 11, the amplitude limiting amplifier circuit 12 connected to the optical receiver module 11, the optical transmitter module 13, the driving circuit 14 connected to the optical transmitter module 13, and the controller 15 connected to the driving circuit 14.

The limiting amplifier circuit 12 is directly connected to the driver circuit 14.

In the embodiment of the present application, the limiting amplification circuit 12 may be configured to modulate the first voltage signal. The first voltage signal is a voltage signal obtained by converting the collected optical signal by the optical receiving component 11.

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

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

Optionally, in this embodiment of the present application, the optical module may be a relay optical module, and the relay optical module may perform relay transmission on an optical signal as a relay.

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

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

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

Optionally, in this embodiment of the application, an impedance matching circuit may be disposed on the flexible circuit board. The impedance matching circuit may be used to impedance match an electrical signal.

Optionally, in this embodiment of the application, the light receiving component 11 may include a photodetector, and a Trans-Impedance Amplifier (TIA) connected to the photodetector. The TIA is connected to the limiter amplifier circuit 12.

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

Optionally, in this embodiment of the application, the driving circuit 14 may specifically be a laser driving circuit, and the laser driving circuit may be configured to drive the laser to emit an optical signal with a certain optical power.

The operation principle of the optical module according to the embodiment of the present application will be described in detail below.

Optionally, in this embodiment of the application, a photodetector in the light receiving assembly 11 may receive the light signal, convert the light signal into an electrical signal in a proportional manner, transmit the electrical signal to a TIA in the light receiving assembly 11, convert the electrical signal into a voltage signal by the TIA, and amplify the converted voltage signal to a required amplitude to obtain a first voltage signal; then, the first voltage signal is transmitted to the impedance matching circuit, and the first voltage signal may be transmitted to the amplitude limiting amplifying circuit 12 after being impedance matched by the impedance matching circuit, so as to complete the re-amplification and shaping of the first voltage signal; then, the modulated first voltage signal may be transmitted to the driving circuit 14 to complete the coupling of the electrical signal, and the coupled first voltage signal is driven by the driving circuit 14, impedance-matched by the impedance matching circuit, and then transmitted to the light emitting assembly 13; finally, the optical transmitting module 13 may convert the received electrical signal into an optical signal with a certain optical power, and send the optical signal with the optical power to the next optical fiber for transmission.

Optionally, in this embodiment of the present application, with reference to fig. 1, as shown in fig. 2, the optical module provided in this embodiment of the present application may further include: a first clock data recovery circuit 16 connected to the limiting amplification circuit 12, and a second clock data recovery circuit 17 connected to both the first clock data recovery circuit 16 and the drive circuit 14.

The first clock data recovery circuit 16 and the second clock data recovery circuit 17 are both configured to perform clock recovery on an optical signal, where the optical signal is: the optical signal received by the optical receiving component 11 and processed by the limiting amplification circuit 12.

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

In the embodiment of the present application, because the first clock data recovery circuit and the second clock data recovery circuit can extract a clock signal from an input optical signal and find out a phase relationship between the clock signal and data of the optical signal, the clock recovery can be performed on the optical signal, and jitter of the optical signal is eliminated, so that loss of the optical signal on a trace and a connector can be compensated, and transmission requirements of a high-speed optical signal can be met.

Optionally, in this embodiment of the present application, with reference to fig. 2, as shown in fig. 3, the optical module provided in this embodiment of the present application may further include: a first switching element 18 connected in parallel with the first clock data recovery circuit 16, and a second switching element 19 connected in parallel with the second clock data recovery circuit 17; the first switching assembly 18 is connected to the second switching assembly 19.

The first switch component 18 is used for controlling the first clock data recovery circuit 16 to be disconnected or connected with the amplitude limiting amplification circuit 12; the second switching component 19 is used to control the second clock data recovery circuit 17 to be disconnected or connected to the driving circuit 14.

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

Optionally, in this embodiment of the application, the optical module may control the first clock data recovery circuit 16 to be disconnected or connected to the amplitude limiting amplification circuit 12 by controlling the first switch assembly 18 to be turned on or turned off; and controls the second clock data recovery circuit 17 to be disconnected or connected with the driving circuit 14 by controlling the second switching component 19 to be closed or opened.

The following describes in detail a specific method for controlling the first switch assembly 18 to be turned on or off and the second switch assembly 19 to be turned on or off by the optical module according to the embodiment of the present application.

Alternatively, in the embodiment of the present application, the light module may control the first switch assembly 18 and the second switch assembly 19 to be turned on or off in at least one of the following manners.

In a first mode

Alternatively, in the embodiment of the present application, as shown in fig. 3, the control terminal a of the first switch assembly 18 and the control terminal b of the second switch assembly 19 are both connected to the controller 15.

The controller 15 controls the first switch component 18 to be turned on or off, and controls the first clock data recovery circuit 16 to be turned off or connected with the amplitude limiting amplification circuit 12; and controls the second clock data recovery circuit 17 to be disconnected or connected with the driving circuit 14 by controlling the second switching component 19 to be closed or opened.

Specifically, the controller 15 may control the first clock data recovery circuit 16 to be disconnected from the limiting amplification circuit 12 by controlling the first switching element 18 to be closed; alternatively, the first clock data recovery circuit 16 is controlled to be connected to the limiting amplification circuit 12 by controlling the first switching element 18 to be turned off. The controller 15 may control the second clock data recovery circuit 17 to be disconnected from the driving circuit 14 by controlling the second switch assembly 19 to be closed; alternatively, the second switching element 19 is controlled to be turned off, and the second clock data recovery circuit 17 is controlled to be connected to the driving circuit 14.

In the embodiment of the present application, the controller 15 may control the first clock data recovery circuit 16 to be disconnected or connected to the amplitude limiting amplification circuit 12 by controlling the first switching component 18 to be turned on or off; and controls the second clock data recovery circuit 17 to be disconnected or connected with the driving circuit 14 by controlling the second switch assembly 19 to be closed or opened; therefore, whether the clock data recovery circuit is connected to the optical module can be controlled through the first switch assembly 18 and the second switch assembly 19, so that the optical module can adapt to different optical communication scenes.

Mode two

Optionally, in this embodiment of the application, with reference to fig. 3, as shown in fig. 4, the optical module provided in this embodiment of the application may further include a housing 20, where a dial switch 21 is disposed on the housing 20; the control terminal a of the first switch assembly 18 and the control terminal b of the second switch assembly 19 are both connected to the dial switch 21.

The dial switch 21 controls the first switch component 18 to be switched on or switched off, and controls the first clock data recovery circuit 16 to be switched off or connected with the amplitude limiting amplification circuit 12; and controls the second clock data recovery circuit 17 to be disconnected or connected with the driving circuit 14 by controlling the second switching element 19 to be closed or opened.

Specifically, the dial switch 21 may control the first clock data recovery circuit 16 to be disconnected from the amplitude limiting amplification circuit 12 by controlling the first switch component 18 to be closed; alternatively, the first clock data recovery circuit 16 is controlled to be connected to the limiting amplification circuit 12 by controlling the first switching element 18 to be turned off. The dial switch 21 can control the second clock data recovery circuit 17 to be disconnected from the driving circuit 14 by controlling the second switch assembly 19 to be closed; alternatively, the second switching element 19 is controlled to be turned off, and the second clock data recovery circuit 17 is controlled to be connected to the driving circuit 14.

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

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

Optionally, in this embodiment of the application, if the dial switch 21 outputs a high level, the first switch component 18 may be controlled to be turned off, the first clock data recovery circuit 16 is controlled to be connected to the amplitude limiting amplification circuit 12, and the second switch component 19 is controlled to be turned off, and the second clock data recovery circuit 17 is controlled to be connected to the driving circuit 14; i.e. the first clock data recovery circuit 16 and the second clock data recovery circuit 17 are switched into circuit (i.e. line 1 in fig. 4 is conductive). If the dial switch 21 outputs a low level, the first switch component 18 is controlled to be closed, the first clock data recovery circuit 16 and the amplitude limiting amplification circuit 12 are controlled to be disconnected, and the second switch component 19 is controlled to be closed, so that the second clock data recovery circuit 17 and the driving circuit 14 are controlled to be disconnected; i.e. the first clock data recovery circuit 16 and the second clock data recovery circuit 17 are disabled from accessing the circuit (i.e. line 2 in fig. 4 is conductive).

In the embodiment of the application, the 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 further control whether to access the clock data recovery circuit, so that the flexibility of controlling the on/off of the first switch component 18 and the second switch component 19 can be improved, and the optical module can adapt to different optical communication scenes.

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

Optionally, in this embodiment of the application, a gold finger may be further disposed on the PCB, and the power supply assembly may supply power to the amplitude limiting and amplifying circuit 12, the driving circuit 14, and the controller 15 through the gold finger.

Optionally, in this embodiment of the application, the power supply module may be a battery power supply module. The power supply assembly may be disposed inside the optical module, may be disposed on the housing 20 of the optical module, and may be disposed outside the optical module and connected to the optical module. The method can be specifically set according to actual use requirements, and the embodiment of the application is not limited.

Optionally, in this embodiment of the application, the power supply module may be a solar power supply module. The power supply assembly may be disposed on the housing 20 of the optical module, or may be disposed outside the optical module and connected to the optical module. The method and the device can be specifically set according to actual use requirements, and the embodiment of the application is not limited.

In the optical module provided by the embodiment of the application, because the amplitude limiting amplifying circuit can be directly connected with the driving circuit, that is, the amplitude limiting amplifying circuit can be directly used as an electrical signal input interface circuit in the traditional optical module, and the driving circuit can be directly used as an electrical signal output interface circuit in the traditional optical module, no special electrical signal input interface circuit and no special electrical signal output interface circuit need to be additionally arranged in the optical module, and thus the manufacturing cost of the optical module can be saved.

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

The optical communication system can convert an input optical signal into an electrical signal and then convert the electrical signal into transparent transmission of the optical signal through structures such as the optical receiving component 11, the amplitude limiting amplifying circuit 12, the optical transmitting component 13, the driving circuit 14 and the like. Meanwhile, the controller 15 may configure the driving circuit 14 with a driving current, so that the driving circuit 14 drives the light emitting component 13 to emit a light signal with a certain light power, so as to ensure that the emitted light signal meets the light power requirement. When the optical power needs to be improved, the functions similar to a repeater and an optical amplifier can be realized. In addition, since the amplitude limiting amplifier circuit 12 can be directly used as an electrical signal input interface circuit in the conventional optical module, and the driving circuit 14 can be directly used as an electrical signal output interface circuit in the conventional optical module, a special electrical signal input interface circuit and an electrical signal output interface circuit do not need to be additionally arranged in the optical module, so that the layout cost of the optical communication system can be saved.

For specific descriptions of structures, connection relationships, working principles, and the like of each component in the optical module, reference may be made to the related descriptions in the above optical module embodiments, and details are not repeated here in order to avoid repetition.

In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to 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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