Optical module and control method thereof

Abstract

This invention discloses an optical module and its control method. The optical module includes an optical transmitter, a beam splitter, a first optical modulator, a reflected light monitoring component, a second optical modulator, and an optical control component. The optical transmitter emits a first light beam. The beam splitter receives the first light beam and splits it into a first sub-beam and a second sub-beam. The first and second sub-beams leave the beam splitter along a first transmission path and a second transmission path, respectively, and are transmitted to the optical receiver. The first optical modulator and the reflected light monitoring component are respectively disposed in the first transmission path. The first optical modulator loads information onto the first sub-beam, and the reflected light monitoring component receives the light beam reflected by the optical receiver. The second optical modulator and the optical control component are respectively disposed in the second transmission path. The second optical modulator loads information onto the second sub-beam; the optical control component receives the second sub-beam and adjusts the optical power of the second sub-beam after it leaves the optical control component.

Description

Technical Field

[0001] This invention relates to the field of optical communication technology, and in particular to an optical module and its control method. Background Technology

[0002] Optical modules in optical communication systems have numerous technical specifications, among which the reflected light intensity in the optical module link is a key focus. Reflected light intensity refers to the total optical power of the beam reflected from the optical module at other nodes in the optical communication link. This parameter is crucial for ensuring the correctness of data transmission and the stability of the system. Especially in high-bandwidth, PAM4 modulation scenarios such as 400G / 800G / 1.6T, even a slight increase in reflected light intensity above the threshold can cause signal distortion and a spike in bit error rate, leading to bandwidth reduction, link interruptions, and in severe cases, even laser lifespan degradation, directly reducing the overall throughput, stability, and operational efficiency of the data center. Therefore, given the high sensitivity of high-order modulation signals such as PAM4 to reflected light intensity, reflected light intensity monitoring is one of the key technologies for ensuring the stable operation of optical module links.

[0003] Optical modules typically emit multiple light beams from their transmitter. Each beam is loaded with information by an optical modulator and then transmitted via optical fiber to the optical receiver. However, factors such as fiber connections, splices, bends, internal defects, damage, or inherent end-face defects can cause strong reflections upon receiving the light beams. This can lead to a precipitous increase in the bit error rate at the receiver in high-speed links, directly destroying signal integrity and even causing drastic power fluctuations or damage to the laser at the transmitter. In existing technologies, detecting multiple optical fibers transmitting multiple light beams requires a separate laser, optical modulator, and reflection monitoring component in the transmission path of each beam, resulting in wasted space and cost. Therefore, to address these technical problems, it is necessary to provide an optical module and its control method that, while maintaining miniaturization, simultaneously transmits light beams to the optical receiver and performs fault detection on the optical fibers within the receiver, improving fiber fault detection efficiency and reducing the manufacturing cost of the optical module. Summary of the Invention

[0004] The purpose of this invention is to provide an optical module and its control method, which, while keeping the optical module miniaturized, can simultaneously transmit a light beam to the optical receiver and perform fault detection on the optical fiber in the optical receiver, thereby improving the fault detection efficiency of the optical fiber and reducing the manufacturing cost of the optical module.

[0005] To achieve the above objectives, a specific embodiment of the present invention provides the following technical solution:

[0006] An embodiment of the present invention provides an optical module, comprising:

[0007] A light emitting end, wherein the light emitting end is used to emit a first light beam;

[0008] A beam splitter is used to receive the first beam. The first beam is transmitted through the beam splitter and split into a first sub-beam and a second sub-beam. The first sub-beam and the second sub-beam leave the beam splitter along a first transmission path and a second transmission path, respectively, and transmit the beam to the light receiving end.

[0009] A first optical modulator and a reflected light monitoring component are respectively disposed in the first transmission path. The first optical modulator is used to load information onto the first sub-beam, and the reflected light monitoring component is used to receive the beam reflected by the optical receiver.

[0010] A second optical modulator and an optical control component are respectively disposed in the second transmission path. The second optical modulator is used to load information for the second sub-beam. The optical control component is used to receive the second sub-beam and adjust the optical power of the second sub-beam after it leaves the optical control component.

[0011] Preferably, the optical control component includes an optical switch and / or an adjustable optical attenuator.

[0012] More preferably, when the optical control component includes an optical switch, the optical switch includes a first optical input port, a second optical input port, a first optical output port, a second optical output port, a first optical beamsplitter, a second optical beamsplitter, a first waveguide arm, and a second waveguide arm. The first optical input port and the second optical input port are respectively connected to the first optical beamsplitter, and the first optical output port and the second optical output port are respectively connected to the second optical beamsplitter. The first optical beamsplitter includes a first optical output interface and a second optical output interface, and the second optical beamsplitter includes a first optical input interface and a second optical input interface. The first optical output interface and the first optical input interface are connected through the first waveguide arm, and the second optical output interface and the second optical input interface are connected through the second waveguide arm. A phase shifter is integrated in the first waveguide arm and the second waveguide arm.

[0013] More preferably, when the optical control component includes an adjustable optical attenuator, the adjustable optical attenuator includes a third optical input port, a third optical output port, a third optical beam splitter, a fourth optical beam splitter, a third waveguide arm, and a fourth waveguide arm. The third optical input port is connected to the third optical beam splitter, and the third optical output port is connected to the fourth optical beam splitter. The third optical beam splitter includes a third optical output interface and a fourth optical output interface, and the fourth optical beam splitter includes a third optical input interface and a fourth optical input interface. The third optical output interface and the third optical input interface are connected through the third waveguide arm, and the fourth optical output interface and the fourth optical input interface are connected through the fourth waveguide arm. A phase shifter is integrated in each of the third and fourth waveguide arms.

[0014] Preferably, the optical power P1 of the first sub-beam accounts for a first proportion X1 of the optical power of the first beam before it is transmitted through the beam splitter element, and the optical power P2 of the second sub-beam accounts for a second proportion X2 of the optical power of the first beam before it is transmitted through the beam splitter element, with the ratio of the first proportion X1 to the second proportion X2 being 1:1.

[0015] Preferably, the optical module further includes a first optical output port and a second optical output port, the first optical output port being disposed on the first transmission path and used to cooperate with the optical receiver, and the second optical output port being disposed on the second transmission path and used to cooperate with the optical receiver.

[0016] Preferably, the first beam is further split into at least one third sub-beam after being transmitted through the beam splitting element, and the at least one third sub-beam leaves the beam splitting element along at least one third transmission path respectively;

[0017] Each of the third transmission paths is provided with a third optical modulator and an optical control component.

[0018] More preferably, the optical module further includes at least one third optical output port, and the at least one third optical output port is respectively disposed on at least one third transmission path and used to cooperate with the optical receiver.

[0019] More preferably, the optical power P1 of the first sub-beam accounts for a first proportion X1 of the optical power of the first beam before it is transmitted through the beam splitter element, the optical power P2 of the second sub-beam accounts for a second proportion X2 of the optical power of the first beam before it is transmitted through the beam splitter element, and the optical power P3 of each third sub-beam accounts for a third proportion X3 of the optical power of the first beam before it is transmitted through the beam splitter element, with the ratio of the first proportion X1, the second proportion X2, and the third proportion X3 being 1:1:1.

[0020] Preferably, the light emitting end includes a plurality of laser units, each of which is used to emit a plurality of the first light beams, wherein the wavelengths of the first light beams emitted by the plurality of laser units are different from each other;

[0021] The optical module includes multiple beam-splitting elements, each beam-splitting element corresponding to a laser unit. After being transmitted through the corresponding beam-splitting elements, the multiple first beams are split into multiple first sub-beams and multiple second sub-beams. The first transmission path includes multiple first transmission sub-paths, and each first sub-beam leaves the corresponding beam-splitting element along a different first transmission sub-path. The second transmission path includes multiple second transmission sub-paths, and each second sub-beam leaves the corresponding beam-splitting element along a different second transmission sub-path.

[0022] Further preferably, the optical module includes a plurality of first optical modulators and a plurality of reflected light monitoring components, wherein the plurality of first optical modulators are respectively disposed in a plurality of first transmission sub-paths, and the plurality of reflected light monitoring components are respectively disposed in a plurality of first transmission sub-paths; and,

[0023] The optical module includes a plurality of second optical modulators and a plurality of optical control components. The plurality of second optical modulators are respectively disposed in a plurality of second transmission sub-paths, and the plurality of optical control components are respectively disposed in a plurality of second transmission sub-paths.

[0024] More preferably, the optical module further includes a first wavelength division multiplexing component and a second wavelength division multiplexing component, the first transmission path further includes a first transmission convergence path, and the second transmission path further includes a second transmission convergence path;

[0025] In this process, the first sub-beams in multiple first transmission sub-paths are transmitted together along the first transmission convergence path after being transmitted within the first wavelength division multiplexing component, and the second sub-beams in multiple second transmission sub-paths are transmitted together along the second transmission convergence path after being transmitted within the second wavelength division multiplexing component.

[0026] Further preferably, the optical module includes a plurality of first optical modulators and a reflected light monitoring component, wherein the plurality of first optical modulators are respectively disposed in a plurality of first transmission sub-paths, and the reflected light monitoring component is disposed in the first transmission convergence path; and,

[0027] The optical module includes a plurality of second optical modulators and a plurality of optical control components. The plurality of second optical modulators are respectively disposed in a plurality of second transmission sub-paths, and the plurality of optical control components are respectively disposed in a plurality of second transmission sub-paths.

[0028] Further preferably, the first wavelength division multiplexing component has opposing first and second sides, the first side including a plurality of first optical ports, the second side including a second optical port, the plurality of first optical ports being respectively used to receive a plurality of first sub-beams, and the plurality of first sub-beams exiting the first wavelength division multiplexing component via the second optical port; and,

[0029] The second wavelength division multiplexing component has a third side and a fourth side, the third side including a plurality of third optical ports, and the fourth side including a fourth optical port. The plurality of third optical ports are respectively used to receive a plurality of second sub-beams, and the plurality of second sub-beams leave the second wavelength division multiplexing component through the fourth optical port.

[0030] Preferably, the first optical modulator is disposed on the optical path between the beam splitter and the reflected light monitoring component.

[0031] Preferably, the light emitting end, the beam splitting element, the first light modulator, the reflected light monitoring component, the second light modulator, and the light control component are integrated on the same substrate.

[0032] An embodiment of the present invention further provides a control method for the above-mentioned optical module. The optical control component of the optical module has a first state and a second state. When the optical control component is switched to the first state, the optical power of the second sub-beam after leaving the optical control component is at its maximum value. When the optical control component is switched to the second state, the optical power of the second sub-beam after leaving the optical control component is at its minimum value.

[0033] The control method includes the following steps:

[0034] The optical module emits a first beam, which is transmitted through the beam splitting element of the optical module and split into a first sub-beam and a second sub-beam. The first sub-beam and the second sub-beam leave the beam splitting element along a first transmission path and a second transmission path, respectively, and are transmitted to the optical receiving end.

[0035] The optical control component is switched to the first state. The first transmission path is connected to the first optical receiving port of the optical receiving end through the first optical fiber of the optical receiving end. The first sub-beam is transmitted to the first optical receiving port through the first optical fiber. The second transmission path is connected to the second optical receiving port of the optical receiving end through the second optical fiber of the optical receiving end. The second sub-beam with the maximum optical power is transmitted to the second optical receiving port through the second optical fiber.

[0036] The optical control component is switched to the second state, the first transmission path and the second transmission path are connected through the first optical fiber or the second optical fiber, the first sub-beam is transmitted to the corresponding first optical fiber or the second optical fiber, and the reflected light monitoring component of the optical module is used to receive and detect the optical power of the beam reflected by the corresponding first optical fiber or the second optical fiber.

[0037] Preferably, in the step of switching the light control component to the second state, the reflected light monitoring component generates an alarm signal when it detects that the optical power of the reflected light beam is higher than or equal to a first threshold.

[0038] Wherein, the minimum optical power of the second sub-beam is less than the first threshold.

[0039] Compared with the prior art, the optical module and its control method provided by the embodiments of the present invention include an optical transmitter, a beam splitter, a first optical modulator, a reflected light monitoring component, a second optical modulator, and an optical control component. The optical transmitter emits a first light beam. The beam splitter receives the first light beam, which is then transmitted through the beam splitter and split into a first sub-beam and a second sub-beam. The first sub-beam and the second sub-beam leave the beam splitter along a first transmission path and a second transmission path, respectively, and are transmitted to the optical receiver. The first optical modulator and the reflected light monitoring component are respectively disposed on the first transmission path. The first optical modulator loads information onto the first sub-beam, and the reflected light monitoring component receives the light beam reflected by the optical receiver. The second optical modulator and the optical control component are respectively disposed on the second transmission path. The second optical modulator loads information onto the second sub-beam; the optical control component receives the second sub-beam and adjusts the optical power of the second sub-beam after it leaves the optical control component. Thus, by adjusting the optical power of the second sub-beam after it leaves the optical control component, the beam can be transmitted to the optical receiver when the optical power of the second sub-beam is at its maximum value, and the two ends of the optical fiber can be connected to the first transmission path and the second transmission path respectively when the optical power of the second sub-beam is at its minimum value. The optical fiber fault detection is realized through the reflected light monitoring component, thereby improving the fault detection efficiency of the optical fiber and reducing the manufacturing cost of the optical module while keeping the optical module miniaturized. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 This is a schematic diagram of the optical path structure of the optical module in the first embodiment of the present invention;

[0042] Figure 2 This is a schematic diagram of the structure of an optical switch according to an embodiment of the present invention;

[0043] Figure 3 This is a schematic diagram of the structure of an adjustable optical attenuator in one embodiment of the present invention;

[0044] Figure 4 This is a schematic diagram of the optical path structure of the optical module in the second embodiment of the present invention;

[0045] Figure 5 This is a schematic diagram of the optical path structure of the optical module in the third embodiment of the present invention;

[0046] Figure 6 This is a schematic diagram of the optical path structure of the optical module in the fourth embodiment of the present invention.

[0047] Explanation of key figure labels:

[0048] Laser unit-10, beam splitter-20 / 20', first optical modulator-30a, second optical modulator-30b, third optical modulator-30c, reflected light monitoring component-40, optical control component-50, phase shifter-501, first wavelength division multiplexing component-60a, second wavelength division multiplexing component-60b, first optical output port-70a, second optical output port-70b, third optical output port-70c;

[0049] Optical switch-51, first optical inlet port-511a, second optical inlet port-511b, first optical outlet port-512a, second optical outlet port-512b, first optical beam splitter-513, first optical outlet interface-513a, second optical outlet interface-513b, second optical beam splitter-514, first optical inlet interface-514a, second optical inlet interface-514b, first waveguide arm-515a, second waveguide arm-515b;

[0050] Adjustable optical attenuator-52, third optical inlet port-521, third optical outlet port-522, third optical beam splitter-523, third optical outlet interface-523a, fourth optical outlet interface-523b, fourth optical beam splitter-524, third optical inlet interface-524a, fourth optical inlet interface-524b, third waveguide arm-525a, fourth waveguide arm-525b;

[0051] First beam - L1, first sub-beam - L11, second sub-beam - L12, third sub-beam - L13, reflected beam - L2. Detailed Implementation

[0052] To enable those skilled in the art to better understand the technical solutions in this disclosure, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this disclosure.

[0053] An embodiment of the present invention provides an optical module. Please refer to [link / reference]. Figure 1 , Figure 1 This is a schematic diagram of the optical path structure of the optical module in the first embodiment of the present invention. The optical module in the first embodiment includes an optical transmitter, a beam splitter 20, a first optical modulator 30a, a reflected light monitoring component 40, a second optical modulator 30b, and an optical control component 50. The optical transmitter includes at least one laser unit 10 for emitting a first beam L1 (in this embodiment, the first beam L1 has a TE polarization state, but is not limited thereto). The beam splitter 20 is used to receive the first beam L1. The first beam L1 is transmitted through the beam splitter 20 and split into a first sub-beam L11 (in this embodiment, the first sub-beam L11 has a TE polarization state, but is not limited thereto) and a second sub-beam L12 (in this embodiment, the second sub-beam L12 has a TE polarization state, but is not limited thereto). The first sub-beam L11 and the second sub-beam L12 leave the beam splitter 20 along a first transmission path and a second transmission path, respectively, and are transmitted to the optical receiver. In this embodiment, the optical receiver includes an optical receiving component (Receiver Optical Subassembly, abbreviated as ROSA) in another optical module and an optical fiber for transmitting the light beam to the optical receiving component. In other words, the light beam L2 reflected by the optical receiver includes the light beam L2 reflected by the optical fiber (in this embodiment, the light beam L2 reflected by the optical fiber has TE polarization state and TM polarization state, but is not limited thereto).

[0054] A first optical modulator 30a is disposed in the first transmission path. The first optical modulator 30a loads information onto a first sub-beam L11, enabling the optical receiving component to parse the information after receiving the loaded first sub-beam L11 via optical fiber, thereby completing data transmission between the two optical modules. A second optical modulator 30b is disposed in the second transmission path. The second optical modulator 30b loads information onto a second sub-beam L12, enabling the optical receiving component to parse the information after receiving the loaded second sub-beam L12 via optical fiber, thereby completing data transmission between the two optical modules. The information loaded onto the beams by the first optical modulator 30a and the second optical modulator 30b can be different or the same; however, practical applications are not limited to this.

[0055] Based on the above optical path structure, the reflected light monitoring component 40 is disposed in the first transmission path to receive the light beam L2 reflected by the light receiving end; the light control component 50 is disposed in the second transmission path to receive the second sub-beam L12 and adjust the optical power of the second sub-beam L12 after it leaves the light control component 50. Thus, by adjusting the optical power of the second sub-beam L12 after it leaves the light control component 50, it is possible to achieve the following: when the optical power of the second sub-beam L12 after leaving the light control component 50 is at its maximum value (hereinafter referred to as the control component 50 switching to the first state, which will not be elaborated further), ... Figure 1 As shown in part (a), the first beam L1 is split into at least two transmission paths to load information and transmit it separately, which helps to reduce the number of laser units 10 and reduce the space occupied within the optical module; it also allows the second sub-beam L12 to have its optical power at its minimum after leaving the optical control component 50 (hereinafter referred to as the control component 50 switching to the second state, which will not be described in detail hereafter), such as Figure 1As shown in part (b), the two ends of any one optical fiber or a combination of multiple optical fibers fused together in the optical receiver (hereinafter referred to as the fiber under test, which will not be described in detail) are respectively connected to the first transmission path and the second transmission path. At this time, the first transmission path transmits the first sub-beam L11 to the fiber under test, while the optical power of the second sub-beam L12 in the second transmission path is low and can be ignored. If the fiber under test has a defect, the fiber under test will reflect the first sub-beam L11 and form the reflected beam L2. The reflected beam L2 returns to the first transmission path and is received by the reflected light monitoring component 40 to detect the optical power of the reflected beam L2. The second sub-beam L12 with low optical power cannot trigger its alarm threshold when transmitted to the reflected light monitoring component 40 through the fiber under test, and will not affect the detection of the reflected beam L2 by the reflected light monitoring component 40. That is, the fault detection of the fiber under test is realized by the reflected light monitoring component 40, which improves the fault detection efficiency of the optical fiber and reduces the manufacturing cost of the optical module while keeping the optical module miniaturized.

[0056] It should be noted that when the control component 50 switches to the second state, the first optical modulator 30a does not load information onto the first sub-beam L11. In other words, the first optical modulator 30a is only used to allow the first sub-beam L11 to pass through and continue to transmit, so as to avoid affecting the accuracy of the reflection light monitoring component 40 in detecting the reflected beam L2, and also to avoid increasing the additional energy consumption of the optical module. However, the actual application is not limited to this.

[0057] In this embodiment, the optical module further includes a first optical output port 70a and a second optical output port 70b. The first optical output port 70a is disposed at one end of the first transmission path, and the second optical output port 70b is disposed at one end of the second transmission path. When the control component 50 switches to the first state, the first optical output port 70a is connected to the first optical receiving port of the optical receiver (optical receiving component) through the first optical fiber of the optical receiver, and the second optical output port 70b is connected to the second optical receiving port of the optical receiver (optical receiving component) through the second optical fiber of the optical receiver, so as to realize that the first sub-beam L11 carrying information is transmitted to the optical receiving component through the first optical fiber, and the second sub-beam L12 carrying information is transmitted to the optical receiving component through the second optical fiber. When the control component 50 switches to the second state, the two ends of the optical fiber to be tested (e.g., the first optical fiber or a section separated when it is a fiber optic assembly, the second optical fiber or a section separated when it is a fiber optic assembly, etc.) are respectively connected to the first optical output port 70a and the second optical output port 70b to close the optical paths at both ends of the optical fiber to be tested. If there is a defect in the optical fiber to be tested, the reflected light monitoring component 40 can detect the optical power of the light beam L2 reflected by the optical fiber to be tested.

[0058] It should be noted that the connection between one end of the optical fiber under test and the second optical output port 70b is to ensure that when the first sub-beam L11, which is transmitted into the optical fiber under test, leaves the optical fiber under test, a transmission path is still provided for the first sub-beam L11. This prevents the reflection of the first sub-beam L11 when one end of the optical fiber under test is unloaded or blocked from being received by the reflected light monitoring component 40, thus avoiding misjudgment. Specifically, the reflected light monitoring component 40 generates an alarm signal when it detects that the optical power of the reflected beam L2 is higher than or equal to a first threshold. When the optical control component 50 in the second transmission path switches to the second state, the optical power of the second sub-beam L12 transmitted in the second transmission path is less than the first threshold. Even if the second sub-beam L12 is transmitted to the reflected light monitoring component 40, its lower optical power is still below the first threshold at which the reflected light monitoring component 40 generates an alarm signal, thus avoiding misjudgment. In other words, when the minimum optical power of the second sub-beam L12 is sufficiently small, it can be approximately understood that no beam leaves the optical control component 50 and transmits to the second optical output port 70b.

[0059] In a preferred embodiment, such as Figure 1As shown, the optical control component 50 includes an optical switch 51 (OS) and / or a variable optical attenuator 52 (VOA). That is, the second transmission path may only have an optical switch 51, only an adjustable optical attenuator 52, or both. Both the optical switch 51 and the adjustable optical attenuator 52 can be individually adjusted to maximize or minimize the optical power of the second sub-beam L12 when it leaves the optical control component 50. When the optical switch 51 and the adjustable optical attenuator 52 are used in combination, the optical power of the second sub-beam L12 at its minimum value can be further reduced, minimizing the impact of the second sub-beam L12 on the reflected light monitoring component 40.

[0060] In this embodiment, please refer to Figure 2 , Figure 2This is a schematic diagram of the structure of an optical switch 51 according to an embodiment of the present invention. The optical switch 51 has a first light inlet 511a, a second light inlet 511b, a first light outlet 512a, and a second light outlet 512b. The first light inlet 511a and the second light inlet 511b are respectively connected to a first optical beam splitter 513 (e.g., a 2×2 optical beam splitter, but not limited thereto). The first light outlet 512a and the second light outlet 512b are respectively connected to a second optical beam splitter 514 (e.g., a 2×2 optical beam splitter, but not limited thereto). (A 2×2 optical beam splitter, but not limited to this). The first optical beam splitter 513 includes a first output interface 513a and a second output interface 513b, and the second optical beam splitter 514 includes a first input interface 514a and a second input interface 514b. The first output interface 513a and the first input interface 514a are connected by a first waveguide arm 515a, and the second output interface 513b and the second input interface 514b are connected by a second waveguide arm 515b. A beam entering from either the first input port 511a or the second input port 511b will be split into two beams by the first optical beam splitter 513. These beams will exit the first optical beam splitter 513 at the first output interface 513a and the second output interface 513b, respectively, and will be transmitted along the first waveguide arm 515a and the second waveguide arm 515b to the first input interface 514a and the second input interface 514b of the second optical beam splitter 514, respectively. Phase shifters 501 are integrated in the first waveguide arm 515a and the second waveguide arm 515b, respectively. By applying a voltage to each phase shifter 501, the phase change of the optical signal on the first waveguide arm 515a and the second waveguide arm 515b is independently controlled. This controls the interference result when the two beams are combined at the second optical beam splitter 514 after passing through the first optical input interface 514a and the second optical input interface 514b, realizing the direct or cross switching of the optical path. That is, the combined beam can be controlled to exit from either the first optical output port 512a or the second optical output port 512b. Based on the structure of the optical switch 51, by connecting one of the first optical input port 511a and the second optical input port 511b and one of the first optical output port 512a and the second optical output port 512b to the second transmission path, the optical power of the second sub-beam L12 after leaving the optical control component 50 can be adjusted to be at its maximum or minimum value.

[0061] For example, the first optical inlet 511a and the first optical outlet 512a are respectively connected to the second transmission path. The second sub-beam L12 enters the optical switch 51 through the first optical inlet 511a and is split into two beams by the first optical beam splitter 513. By adjusting the voltage of the phase shifter 501 in the first waveguide arm 515a and the voltage of the phase shifter 501 in the second waveguide arm 515b, the two beams can be combined at the second optical beam splitter 514 and then selectively exit the optical switch 51 along the first optical outlet 512a or along the second optical outlet 512b. When the optical switch 51 is switched to the first state, the two beams are combined and leave the optical switch 51 along the first light outlet 512a, that is, the optical power of the second sub-beam L12 after leaving the optical control component 50 is at its maximum value; when the optical switch 51 is switched to the second state, the two beams are combined and leave the optical switch 51 along the second light outlet 512b, that is, the optical power of the second sub-beam L12 after leaving the optical control component 50 is at its minimum value.

[0062] It should be noted that the adjustment of the voltage of the phase shifter 501 in the first waveguide arm 515a and the voltage of the phase shifter 501 in the second waveguide arm 515b can be a single point value or any voltage value within a certain preset voltage range. Ideally, after the two beams are combined, they completely exit the optical switch 51 from the first light outlet 512a, meaning the optical power of the second sub-beam L12 after leaving the optical control component 50 is at its maximum; or, after the two beams are combined, they completely exit the optical switch 51 from the second light outlet 512b, meaning the optical power of the second sub-beam L12 after leaving the optical control component 50 is at its minimum. In actual operation, the voltage value is usually adjusted to the preset voltage range. At this time, after the two beams are combined, most of them leave the optical switch 51 from the first light outlet 512a (a smaller part leaves the optical switch 51 from the second light outlet 512b). This can also be understood as the optical power of the second sub-beam L12 after leaving the optical control component 50 being at its maximum value. Alternatively, after the two beams are combined, most of them leave the optical switch 51 from the second light outlet 512b (a smaller part leaves the optical switch 51 from the first light outlet 512a). This can also be understood as the optical power of the second sub-beam L12 after leaving the optical control component 50 being at its minimum value.

[0063] In this embodiment, please refer to Figure 3 , Figure 3This is a schematic diagram of the structure of an adjustable optical attenuator 52 in one embodiment of the present invention. The adjustable optical attenuator 52 has a third optical input port 521 and a third optical output port 522. The third optical input port 521 is connected to a third optical beamsplitter 523 (e.g., a 1×2 optical beamsplitter, but not limited thereto). The third optical output port 522 is connected to a fourth optical beamsplitter 524 (e.g., a 1×2 optical beamsplitter, but not limited thereto). The third optical beamsplitter 523 includes a third optical output interface 523a and a fourth optical output interface 523b. The fourth optical beamsplitter 524 includes a third optical input interface 524a and a fourth optical input interface 524b. The third optical output interface 523a and the third optical input interface 524a are connected by a third waveguide arm 525a. The fourth optical output interface 523b and the fourth optical input interface 524b are connected by a fourth waveguide arm 525b. The light beam entering through the third input port 521 is split into two beams by the third optical beam splitter 523. These beams exit the third optical beam splitter 523 at the third output port 523a and the fourth output port 523b, respectively, and are transmitted along the third waveguide arm 525a and the fourth waveguide arm 525b to the third input port 524a and the fourth input port 524b of the fourth optical beam splitter 524, respectively. Each of the third and fourth waveguide arms 525a and 525b integrates a phase shifter 501. By applying a voltage to each phase shifter 501, the phase change of the optical signal on each of the third and fourth waveguide arms 525a and 525b is independently controlled, thereby controlling the interference result when the two beams are combined at the second optical beam splitter 514 after passing through the third input port 524a and the fourth input port 524b. Based on the structure of the adjustable optical attenuator 52, when the adjustable optical attenuator 52 is switched to the first state, the two beams combine with the same phase to produce a constructive beam, that is, the optical power of the second sub-beam L12 after leaving the optical control component 50 is at its maximum value; when the adjustable optical attenuator 52 is switched to the second state, the two beams combine with opposite phases to produce a destructive beam, that is, the optical power of the second sub-beam L12 after leaving the optical control component 50 is at its minimum value.

[0064] It should be noted that the adjustment of the voltage of the phase shifter 501 in the third waveguide arm 525a and the phase shifter 501 in the fourth waveguide arm 525b can be a single point value or any voltage value within a preset voltage range. Ideally, the two beams are combined with exactly the same phase and exit the adjustable optical attenuator 52 from the third light outlet 522, meaning the optical power of the second sub-beam L12 after leaving the optical control component 50 is at its maximum; or, the two beams are combined with completely opposite phases and exit the adjustable optical attenuator 52 from the third light outlet 522, meaning the optical power of the second sub-beam L12 after leaving the optical control component 50 is at its minimum. In actual operation, the voltage value is usually adjusted to the preset voltage range. At this time, the two beams are combined with similar phases and leave the adjustable optical attenuator 52 from the third light outlet 522. This can also be understood as the optical power of the second sub-beam L12 after leaving the optical control component 50 is at its maximum value. Alternatively, the two beams are combined with nearly opposite phases and leave the adjustable optical attenuator 52 from the third light outlet 522. This can also be understood as the optical power of the second sub-beam L12 after leaving the optical control component 50 is at its minimum value.

[0065] In a preferred embodiment, the optical power P1 of the first sub-beam L11 accounts for a first proportion X1 of the total optical power of the first beam L1 before transmission through the beam splitter 20, and the optical power P2 of the second sub-beam L12 accounts for a second proportion X2 of the total optical power of the first beam L1 before transmission through the beam splitter 20. The ratio of the first proportion X1 to the second proportion X2 is 1:1. That is, the beam splitter 20 evenly divides the first beam L1, ensuring that the optical power of the first sub-beam L11 and the second sub-beam L12 is sufficiently large during data transmission.

[0066] In a preferred embodiment, the first optical modulator 30a is disposed in the optical path between the beam splitter 20 and the reflected light monitoring component 40. In other words, the first sub-beam L11 is transmitted sequentially through the first optical modulator 30a and the reflected light monitoring component 40 to the first optical output port 70a. This avoids the beam L2 reflected by the fiber under test from having to pass through the first optical modulator 30a before being transmitted to the reflected light monitoring component 40, which would otherwise cause loss and reflection of the beam L2 reflected by the fiber under test, thus affecting the detection accuracy of the reflected light monitoring component 40.

[0067] Please refer to the following: Figure 4 , Figure 4This is a schematic diagram of the optical path structure of the optical module in the second embodiment of the present invention. The similarities between the optical module in the second embodiment and the optical module in the first embodiment will not be repeated. The difference lies in that the beam splitter 20' in the second embodiment is different from the beam splitter 20' in the first embodiment. In addition to splitting the first beam L1 into a first sub-beam L11 and a second sub-beam L12, the beam splitter 20' also splits the beam into at least one third sub-beam L13. Each of the at least one third sub-beam L13 exits the beam splitter 20' along at least one third transmission path. Each of the third transmission paths is provided with a third optical modulator 30c and an optical control component 50.

[0068] In this embodiment, as Figure 4 As shown, the third transmission path is one; in other embodiments, the third transmission path may be two or more; it is not limited thereto. Taking the example that the third transmission path in this embodiment is one, when the control components 50 in the second transmission path and the third transmission path are both switched to the first state, it is realized that a first beam L1 is divided into at least three transmission paths to load information and transmit data respectively, which helps to reduce the number of laser units 10 and reduce the space occupied in the optical module. When the control components 50 in the second transmission path and the third transmission path are both switched to the second state, the two ends of the optical fiber to be tested are respectively connected to the first transmission path and either the second transmission path or the third transmission path, so that the first transmission path transmits the first sub-beam L11 into the optical fiber to be tested, while the optical power of the sub-beam (second sub-beam L12 or third sub-beam L13) in the transmission path (the second transmission path or the third transmission path) connected to the other end of the optical fiber to be tested is low and can be ignored. If the optical fiber to be tested has a defect, the optical fiber to be tested will reflect the first sub-beam L11 and form the reflected beam L2. The reflected beam L2 returns to the first transmission path and is received by the reflected light monitoring component 40 to detect the optical power of the reflected beam L2.

[0069] It should be noted that the accompanying diagram is for simplicity. Figure 4 The diagram only shows a schematic of the optical fiber under test reflecting the first sub-beam L11 and forming the reflected beam L2 when the control components 50 in both the second and third transmission paths are switched to the second state. The optical path structure when the control components 50 in both the second and third transmission paths are switched to the first state can be understood by those skilled in the art. Figure 1 Part (a) and Figure 4 Based on the information obtained, I will not elaborate further.

[0070] Preferably, the optical module in the second embodiment further includes at least one third optical output port 70c. Figure 4 The diagram shows a third optical output port 70c (but is not limited thereto), and at least one third optical output port 70c is respectively disposed in at least one of the third transmission paths and used to cooperate with the optical receiver. That is, when the control component 50 in the third transmission path is switched to the first state, the third optical output port 70c is connected to the third optical receiving port of the optical receiver (optical receiving component) through the third optical fiber of the optical receiver, so as to realize that the third sub-beam L13 carrying information is transmitted to the optical receiving component through the third optical fiber; when the control component 50 in the third transmission path is switched to the second state, the two ends of the optical fiber to be tested can be connected to the first optical output port 70a and the third optical output port 70c respectively (or can be connected to the first optical output port 70a and the second optical output port 70b respectively, without limitation), so as to realize the optical path closure at both ends of the optical fiber to be tested. If there is a defect in the optical fiber to be tested, the reflected light monitoring component 40 can detect the optical power of the beam L2 reflected by the optical fiber to be tested.

[0071] Preferably, the optical power P1 of the first sub-beam L11 accounts for a first proportion (X1) of the optical power of the first beam before transmission through the beam splitter element 20'; the optical power P2 of the second sub-beam accounts for a second proportion (X2) of the optical power of the first beam before transmission through the beam splitter element 20'; and the optical power P3 of each of the third sub-beams accounts for a third proportion (X3) of the optical power of the first beam L1 before transmission through the beam splitter element 20'. The ratio of the first proportion (X1), the second proportion (X2), and the third proportion (X3) is 1:1:1. In other words, the beam splitter element 20' evenly divides the first beam L1, ensuring that the optical power of the first sub-beam L11, the second sub-beam L12, and the third sub-beam L13 is sufficiently high during data transmission.

[0072] In some preferred embodiments, please refer to [further details]. Figure 5 and Figure 6 , Figure 5 This is a schematic diagram of the optical path structure of the optical module in the third embodiment of the present invention. Figure 6This is a schematic diagram of the optical path structure of the optical module in the fourth embodiment of the present invention. The optical emitting end includes multiple laser units 10, which are used to emit multiple first beams L1, wherein the wavelengths of the first beams L1 emitted by the multiple laser units 10 are different from each other. The optical module includes multiple beam splitting elements 20, each beam splitting element 20 corresponding to one laser unit 10. After the multiple first beams L1 are transmitted through the corresponding beam splitting element 20, they are split into multiple first sub-beams L11 and multiple second sub-beams L12. The first transmission path includes multiple first transmission sub-paths, and each first sub-beam L11 leaves the corresponding beam splitting element 20 along a different first transmission sub-path. The second transmission path includes multiple second transmission sub-paths, and each second sub-beam L12 leaves the corresponding beam splitting element 20 along a different second transmission sub-path.

[0073] Based on the above-described preferred embodiments, such as Figure 5 As shown, the optical module in the third embodiment further includes a first wavelength division multiplexing (WDM) component 60a (e.g., a Z-block or other similar optical component) and a second WDM component 60b (e.g., a Z-block or other similar optical component). The first transmission path further includes a first transmission convergence path, and the second transmission path further includes a second transmission convergence path. Specifically, the first sub-beams L11 in the plurality of first transmission sub-paths are transmitted internally through the first WDM component 60a and then jointly transmitted along the first transmission convergence path. Similarly, the second sub-beams L12 in the plurality of second transmission sub-paths are transmitted internally through the second WDM component 60b and then jointly transmitted along the second transmission convergence path.

[0074] It should be noted that, Figure 5 The main purpose is to illustrate the first transmission sub-path and the first transmission convergence path included in the first transmission path, and the second transmission sub-path and the second transmission convergence path included in the second transmission path. Specifically, the beam is in... Figure 5 The transmission situation in the optical path can be understood by those skilled in the art. Figure 1 Part (a) and Figure 1 The combination of part (b) is known and will not be repeated here.

[0075] In the third embodiment, the optical module includes a plurality of first optical modulators 30a and a reflected light monitoring component 40. The plurality of first optical modulators 30a are respectively disposed in a plurality of first transmission sub-paths, and the reflected light monitoring component 40 is disposed in a first transmission convergence path. Furthermore, the optical module includes a plurality of second optical modulators 30b and a plurality of optical control components 50. The plurality of second optical modulators 30b are respectively disposed in a plurality of second transmission sub-paths, and the plurality of optical control components 50 are respectively disposed in a plurality of second transmission sub-paths.

[0076] In the third embodiment, as Figure 5 As shown, the first optical output port 70a is disposed at the end of the first transmission convergence path, and the second optical output port 70b is disposed at the end of the second transmission convergence path. In this way, the number of the first optical output port 70a and the second optical output port 70b can be reduced, which is beneficial to the miniaturization of the optical module.

[0077] Based on the above-described preferred embodiments, such as Figure 6 As shown, the optical module in the fourth embodiment includes a plurality of first optical modulators 30a and a plurality of reflected light monitoring components 40. The plurality of first optical modulators 30a are respectively disposed in a plurality of first transmission sub-paths, and the plurality of reflected light monitoring components 40 are respectively disposed in a plurality of first transmission sub-paths. Furthermore, the optical module includes a plurality of second optical modulators 30b and a plurality of optical control components 50. The plurality of second optical modulators 30b are respectively disposed in a plurality of second transmission sub-paths, and the plurality of optical control components 50 are respectively disposed in a plurality of second transmission sub-paths.

[0078] It should be noted that, Figure 6 The main purpose is to illustrate the first transmission sub-path and the first transmission convergence path included in the first transmission path, and the second transmission sub-path and the second transmission convergence path included in the second transmission path. Specifically, the beam is in... Figure 6 The transmission situation in the optical path can be understood by those skilled in the art. Figure 1 Part (a) and Figure 1 The combination of part (b) is known and will not be repeated here.

[0079] Preferably, the optical module in the fourth embodiment further includes a first wavelength division multiplexing (WDM) component 60a and a second WDM component 60b. The first transmission path further includes a first transmission convergence path, and the second transmission path further includes a second transmission convergence path. Specifically, the first sub-beams L11 in the plurality of first transmission sub-paths are transmitted internally through the first WDM component 60a and then jointly transmitted along the first transmission convergence path. Similarly, the second sub-beams L12 in the plurality of second transmission sub-paths are transmitted internally through the second WDM component 60b and then jointly transmitted along the second transmission convergence path.

[0080] Based on the first wavelength division multiplexing component 60a and the second wavelength division multiplexing component 60b in the fourth embodiment, such as Figure 6 As shown, the first optical output port 70a is disposed at the end of the first transmission convergence path, and the second optical output port 70b is disposed at the end of the second transmission convergence path. In this way, the number of the first optical output port 70a and the second optical output port 70b can be reduced, which is beneficial to the miniaturization of the optical module.

[0081] Based on the third and fourth embodiments, the first wavelength division multiplexing (WDM) component 60a has opposing first and second sides. The first side includes a plurality of first optical ports (not shown in the figure), and the second side includes a second optical port (not shown in the figure). The plurality of first optical ports are respectively used to receive a plurality of first sub-beams L11, and the plurality of first sub-beams L11 exit the first WDM component 60a through the second optical port. Similarly, the second WDM component 60b has opposing third and fourth sides. The third side includes a plurality of third optical ports (not shown in the figure), and the fourth side includes a fourth optical port (not shown in the figure). The plurality of third optical ports are respectively used to receive a plurality of second sub-beams L12, and the plurality of second sub-beams L12 exit the second WDM component 60b through the fourth optical port.

[0082] It should be noted that, in the fourth embodiment, when the optical control component 50 is switched to the second state to detect the optical fiber under test, the second optical port of the first wavelength division multiplexing component 60a receives the light beam L2 reflected by the optical fiber under test. After being demultiplexed by the first wavelength division multiplexing component 60a, the light beam L2 reflected by the optical fiber under test leaves the first wavelength division multiplexing component 60a through multiple first optical ports and is received and detected by the reflected light monitoring component 40 in the corresponding first transmission sub-path.

[0083] It should be noted that the third and fourth embodiments described above are also compatible with the second embodiment. Those skilled in the art can combine the above solutions, and the details of the combined solutions will not be repeated here.

[0084] In other embodiments, the similarities with the optical module in the fourth embodiment will not be repeated. The difference is that the optical module does not include a wavelength division multiplexing component (whose optical path structure is not shown in the figures). That is, there are multiple first optical output ports 70a, which are respectively disposed at the end of each first transmission sub-path; and there are multiple second optical output ports 70b, which are respectively disposed at the end of each second transmission sub-path.

[0085] In some other embodiments, similar to the other embodiments described above, there are multiple first optical output ports 70a, each disposed at the end of each first transmission sub-path; and multiple second optical output ports 70b, each disposed at the end of each second transmission sub-path. The difference lies in that a reflection light monitoring component 40 can be disposed in only one of the multiple first transmission sub-paths, and an optical control component 50 can be disposed in only one of the multiple second transmission sub-paths. The first transmission sub-path with the reflection light monitoring component 40 and the second transmission sub-path with the optical control component 50 correspond to the same laser unit 10. When testing the optical fiber under test, one end of the optical fiber under test is connected to the first transmission sub-path with the reflection light monitoring component 40, while the other end of the optical fiber under test can be connected to the second transmission sub-path with the optical control component 50, and the optical control component 50 switches to the second state; alternatively, it can be connected to the second transmission sub-path corresponding to another laser unit 10, adjusting the other laser unit 10 to a closed state, and its corresponding second transmission sub-path can also be used to test the optical fiber under test.

[0086] In a preferred embodiment, the light emitting end, beam splitting element 20, first light modulator 30a, reflected light monitoring component 40, second light modulator 30b, and light control component 50 are integrated on the same substrate (not shown in the figure). The above-mentioned optical path structure is simple and more conducive to the integration of various optical elements or components on the substrate.

[0087] Preferably, the beam splitter 20' and the third optical modulator 30c in the second embodiment can also be integrated on the substrate, which will not be described in detail here.

[0088] In summary, the optical module and its control method provided by the embodiments of the present invention include an optical transmitter, a beam splitter, a first optical modulator, a reflected light monitoring component, a second optical modulator, and an optical control component. The optical transmitter emits a first light beam. The beam splitter receives the first light beam, which is then transmitted within the beam splitter and split into a first sub-beam and a second sub-beam. The first sub-beam and the second sub-beam leave the beam splitter along a first transmission path and a second transmission path, respectively, and are transmitted to the optical receiver. The first optical modulator and the reflected light monitoring component are respectively disposed on the first transmission path. The first optical modulator loads information onto the first sub-beam, and the reflected light monitoring component receives the light beam reflected by the optical receiver. The second optical modulator and the optical control component are respectively disposed on the second transmission path. The second optical modulator loads information onto the second sub-beam; the optical control component receives the second sub-beam and adjusts the optical power of the second sub-beam after it leaves the optical control component. Thus, by adjusting the optical power of the second sub-beam after it leaves the optical control component, the beam can be transmitted to the optical receiver when the optical power of the second sub-beam is at its maximum value, and the two ends of the optical fiber can be connected to the first transmission path and the second transmission path respectively when the optical power of the second sub-beam is at its minimum value. The optical fiber fault detection is realized through the reflected light monitoring component, thereby improving the fault detection efficiency of the optical fiber and reducing the manufacturing cost of the optical module while keeping the optical module miniaturized.

[0089] It will be apparent to those skilled in the art that this disclosure is not limited to the details of the exemplary embodiments described above, and that this disclosure can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of this disclosure is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this disclosure. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0090] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An optical module, characterized in that, include: A light emitting end, wherein the light emitting end is used to emit a first light beam; A beam splitter is used to receive the first beam. The first beam is transmitted through the beam splitter and split into a first sub-beam and a second sub-beam. The first sub-beam and the second sub-beam leave the beam splitter along a first transmission path and a second transmission path, respectively, and transmit the beam to the light receiving end. A first optical modulator and a reflected light monitoring component are respectively disposed in the first transmission path. The first optical modulator is used to load information onto the first sub-beam, and the reflected light monitoring component is used to receive the beam reflected by the optical receiver. A second optical modulator and an optical control component are respectively disposed in the second transmission path. The second optical modulator is used to load information for the second sub-beam. The optical control component is used to receive the second sub-beam and adjust the optical power of the second sub-beam after it leaves the optical control component.

2. The optical module as described in claim 1, characterized in that, The optical control component includes an optical switch and / or an adjustable optical attenuator.

3. The optical module as described in claim 2, characterized in that, When the optical control component includes an optical switch, the optical switch includes a first optical input port, a second optical input port, a first optical output port, a second optical output port, a first optical beamsplitter, a second optical beamsplitter, a first waveguide arm, and a second waveguide arm. The first optical input port and the second optical input port are respectively connected to the first optical beamsplitter, and the first optical output port and the second optical output port are respectively connected to the second optical beamsplitter. The first optical beamsplitter includes a first optical output interface and a second optical output interface, and the second optical beamsplitter includes a first optical input interface and a second optical input interface. The first optical output interface and the first optical input interface are connected through the first waveguide arm, and the second optical output interface and the second optical input interface are connected through the second waveguide arm. A phase shifter is integrated in the first waveguide arm and the second waveguide arm.

4. The optical module as described in claim 2, characterized in that, When the optical control component includes an adjustable optical attenuator, the adjustable optical attenuator includes a third optical input port, a third optical output port, a third optical beam splitter, a fourth optical beam splitter, a third waveguide arm, and a fourth waveguide arm. The third optical input port is connected to the third optical beam splitter, and the third optical output port is connected to the fourth optical beam splitter. The third optical beam splitter includes a third optical output interface and a fourth optical output interface, and the fourth optical beam splitter includes a third optical input interface and a fourth optical input interface. The third optical output interface and the third optical input interface are connected through the third waveguide arm, and the fourth optical output interface and the fourth optical input interface are connected through the fourth waveguide arm. A phase shifter is integrated in each of the third and fourth waveguide arms.

5. The optical module as described in claim 1, characterized in that, The optical power P1 of the first sub-beam accounts for a first proportion X1 of the optical power of the first beam before it is transmitted through the beam splitter element, and the optical power P2 of the second sub-beam accounts for a second proportion X2 of the optical power of the first beam before it is transmitted through the beam splitter element. The ratio of the first proportion X1 to the second proportion X2 is 1:

1.

6. The optical module as described in claim 1, characterized in that, The optical module further includes a first optical output port and a second optical output port. The first optical output port is disposed on the first transmission path and is used to cooperate with the optical receiver. The second optical output port is disposed on the second transmission path and is used to cooperate with the optical receiver.

7. The optical module as described in claim 1, characterized in that, The first beam is transmitted through the beam splitting element and split into at least one third sub-beam, and the at least one third sub-beam leaves the beam splitting element along at least one third transmission path respectively; Each of the third transmission paths is provided with a third optical modulator and an optical control component.

8. The optical module as described in claim 7, characterized in that, The optical module further includes at least one third optical output port, which is respectively disposed on at least one third transmission path and used to cooperate with the optical receiver.

9. The optical module as described in claim 7, characterized in that, The optical power P1 of the first sub-beam accounts for a first proportion X1 of the optical power of the first beam before it is transmitted through the beam splitter element. The optical power P2 of the second sub-beam accounts for a second proportion X2 of the optical power of the first beam before it is transmitted through the beam splitter element. The optical power P3 of each third sub-beam accounts for a third proportion X3 of the optical power of the first beam before it is transmitted through the beam splitter element. The ratio of the first proportion X1, the second proportion X2, and the third proportion X3 is 1:1:

1.

10. The optical module as described in claim 1, characterized in that, The light emitting end includes multiple laser units, each of which is used to emit multiple first beams, wherein the wavelengths of the first beams emitted by the multiple laser units are different from each other; The optical module includes multiple beam-splitting elements, each beam-splitting element corresponding to a laser unit. After being transmitted through the corresponding beam-splitting elements, the multiple first beams are split into multiple first sub-beams and multiple second sub-beams. The first transmission path includes multiple first transmission sub-paths, and each first sub-beam leaves the corresponding beam-splitting element along a different first transmission sub-path. The second transmission path includes multiple second transmission sub-paths, and each second sub-beam leaves the corresponding beam-splitting element along a different second transmission sub-path.

11. The optical module as described in claim 10, characterized in that, The optical module includes a plurality of first optical modulators and a plurality of reflected light monitoring components, wherein the plurality of first optical modulators are respectively disposed in a plurality of first transmission sub-paths, and the plurality of reflected light monitoring components are respectively disposed in a plurality of first transmission sub-paths; and, The optical module includes a plurality of second optical modulators and a plurality of optical control components. The plurality of second optical modulators are respectively disposed in a plurality of second transmission sub-paths, and the plurality of optical control components are respectively disposed in a plurality of second transmission sub-paths.

12. The optical module as described in claim 10, characterized in that, The optical module further includes a first wavelength division multiplexing component and a second wavelength division multiplexing component, the first transmission path further includes a first transmission convergence path, and the second transmission path further includes a second transmission convergence path; In this process, the first sub-beams in multiple first transmission sub-paths are transmitted together along the first transmission convergence path after being transmitted within the first wavelength division multiplexing component, and the second sub-beams in multiple second transmission sub-paths are transmitted together along the second transmission convergence path after being transmitted within the second wavelength division multiplexing component.

13. The optical module as described in claim 12, characterized in that, The optical module includes a plurality of first optical modulators and a reflected light monitoring component. The plurality of first optical modulators are respectively disposed in a plurality of first transmission sub-paths, and the reflected light monitoring component is disposed in the first transmission convergence path; and, The optical module includes a plurality of second optical modulators and a plurality of optical control components. The plurality of second optical modulators are respectively disposed in a plurality of second transmission sub-paths, and the plurality of optical control components are respectively disposed in a plurality of second transmission sub-paths.

14. The optical module as described in claim 12, characterized in that, The first wavelength division multiplexing (WDM) component has opposing first and second sides. The first side includes a plurality of first optical ports, and the second side includes a second optical port. The plurality of first optical ports are respectively used to receive a plurality of first sub-beams, and the plurality of first sub-beams exit the first WDM component through the second optical port; and... The second wavelength division multiplexing component has a third side and a fourth side, the third side including a plurality of third optical ports, and the fourth side including a fourth optical port. The plurality of third optical ports are respectively used to receive a plurality of second sub-beams, and the plurality of second sub-beams leave the second wavelength division multiplexing component through the fourth optical port.

15. The optical module as described in claim 1, characterized in that, The first optical modulator is disposed on the optical path between the beam splitter and the reflected light monitoring component.

16. The optical module as described in claim 1, characterized in that, The light emitting end, the beam splitting element, the first light modulator, the reflected light monitoring component, the second light modulator, and the light control component are integrated on the same substrate.

17. The control method for an optical module as described in any one of claims 1 to 16, characterized in that, The optical control component of the optical module has a first state and a second state. When the optical control component is switched to the first state, the optical power of the second sub-beam after leaving the optical control component is at its maximum value. When the optical control component is switched to the second state, the optical power of the second sub-beam after leaving the optical control component is at its minimum value. The control method includes the following steps: The optical module emits a first beam, which is transmitted through the beam splitting element of the optical module and split into a first sub-beam and a second sub-beam. The first sub-beam and the second sub-beam leave the beam splitting element along a first transmission path and a second transmission path, respectively, and are transmitted to the optical receiving end. The optical control component is switched to the first state. The first transmission path is connected to the first optical receiving port of the optical receiving end through the first optical fiber of the optical receiving end. The first sub-beam is transmitted to the first optical receiving port through the first optical fiber. The second transmission path is connected to the second optical receiving port of the optical receiving end through the second optical fiber of the optical receiving end. The second sub-beam with the maximum optical power is transmitted to the second optical receiving port through the second optical fiber. The optical control component is switched to the second state, the first transmission path and the second transmission path are connected through the first optical fiber or the second optical fiber, the first sub-beam is transmitted to the corresponding first optical fiber or the second optical fiber, and the reflected light monitoring component of the optical module is used to receive and detect the optical power of the beam reflected by the corresponding first optical fiber or the second optical fiber.

18. The control method as described in claim 17, characterized in that, In the step of switching the light control component to the second state, the reflected light monitoring component generates an alarm signal when it detects that the optical power of the reflected light beam is higher than or equal to a first threshold. Wherein, the minimum optical power of the second sub-beam is less than the first threshold.

Images