Laser transceiver device, method for self-calibrating optical axis, and machine-readable storage medium

Abstract

The present invention relates to a laser transceiver device, a method for optical axis self-calibration of the laser transceiver device, and a machine-readable storage medium. The optical amplifier of the device includes: a first optical amplifier component configured to be connected to a transmitting mirror group via a transmitting optical fiber; a second optical amplifier component configured to be connected to a receiving mirror group via a receiving optical fiber; a calibration light supply device configured to be associated with the first optical amplifier component to provide calibration light; and an optical power detector connected to the second optical amplifier component and configured to detect at least the power of the calibration light. In the case where the forward galvanometer is adjusted for scanning, the calibration light is provided to a position detector for a first measurement of optical axis self-calibration, and the calibration light passing through the receiving mirror group is provided to the optical power detector for a second measurement of optical axis self-calibration. The laser transceiver device of the present invention performs calibration by means of existing devices, does not require laboratory calibration, and the calibration result is not affected by the environment.

Description

Technical Field

[0001] The present invention relates to the field of inter-satellite laser communication technology, and in particular to a laser transceiver device with an optical axis self-calibration function, a method for optically axis self-calibration of the laser transceiver device, and a machine-readable storage medium. Background Art

[0002] Space laser communication technology combines the advantages of radio communication and optical fiber communication, and uses laser as the carrier and the atmosphere as the channel for communication. Space laser communication technology has the advantages of strong anti-interference ability, high security, high communication rate, fast transmission speed, convenient band selection, and large information capacity. Since the optical axis of the laser inter-satellite link terminal is coaxial calibrated on the ground optical state platform, after being put into orbit, due to the influence of atmospheric pressure, temperature, atmospheric turbulence, lead angle, etc., the optical axis will change and produce an axis deviation. For example, in actual use, the laser communication terminal is affected by environmental factors such as force and heat, resulting in the separation of the receiving and transmitting optical axes and the deviation of the tracking point.

[0003] Traditional solutions usually add an additional set of optical paths and assume that the relative relationship between the added optical path and the original communication remains unchanged. By monitoring the change of the added optical path, the change of the optical axis is identified. However, this type of method requires calibrating the relationship between the communication optical path and the calibration optical path in the laboratory and repeatedly calibrating the relationship between the two in a vacuum chamber. The calibration process is complex, and it is impossible to ensure that the relative relationship does not change during the on-orbit process.

[0004] In addition, some existing on-orbit calibrations usually require introducing many additional components and devices to complete the optical axis calibration function, which increases the calibration cost of the laser communication terminal, makes the device control function complex, may interfere with the original functions of the laser communication terminal, and reduces the reliability of the laser communication terminal.

[0005] In summary, the deficiencies of traditional optical axis self-calibration solutions are as follows: additional components and devices are required to complete the optical axis calibration function, laboratory calibration is required, and the calibration results are easily affected by the environment. Summary of the Invention

[0006] The present invention provides a laser transceiver device with an optical axis self-calibration function, a method for optically axis self-calibration of the laser transceiver device, and a machine-readable storage medium, which can perform calibration by means of existing devices, without the need for laboratory calibration, and the calibration results are not affected by the environment.

[0007] According to a first aspect of the present invention, there is provided a laser transceiver device having an optical axis self-calibration function. The laser transceiver device includes: an optical head spatial optical path and an optical amplifier. Among them, the optical head spatial optical path includes a transmitting mirror group, a receiving mirror group, an adjustable pre-oscillating mirror located downstream of the transmitting mirror group, a tracking mirror group located downstream of the pre-oscillating mirror, and a position detector located downstream of the tracking mirror group. The optical amplifier includes: a first optical amplifier component configured to be connected to the transmitting mirror group via a transmitting optical fiber; a second optical amplifier component configured to be connected to the receiving mirror group via a receiving optical fiber; a calibration light supply device configured to be associated with the first optical amplifier component to provide calibration light; and an optical power detector connected to the second optical amplifier component and configured to detect at least the power of the calibration light. When the pre-oscillating mirror is adjusted for scanning, the calibration light is provided to the transmitting mirror group, and then at least via the pre-oscillating mirror and the tracking mirror group to the position detector for the first measurement of optical axis self-calibration, and the calibration light passing through the receiving mirror group is provided to the optical power detector for the second measurement of optical axis self-calibration.

[0008] In some embodiments, the calibration light includes an emitted signal light output from the output end of the first optical amplifier component; and the optical head spatial optical path further includes an attenuation device configured to attenuate the calibration light to adjust the power of the calibration light.

[0009] In some embodiments, the optical head spatial optical path further includes: a dichroic mirror located downstream of the pre-oscillating mirror and upstream of the tracking mirror group; and an optical retroreflector located downstream of the dichroic mirror; wherein the dichroic mirror is configured to emit a first part of the emitted signal light from the pre-oscillating mirror as signal light, and output a second part of the emitted signal light from the pre-oscillating mirror to the optical retroreflector and receive the returned laser from the optical retroreflector and use it as calibration light, and wherein the attenuation device is provided between the dichroic mirror and the optical retroreflector.

[0010] In some embodiments, the calibration light supply device includes a calibration laser disposed in the optical amplifier and juxtaposed with the first optical amplifier component, and the first optical amplifier component includes a beam combining device at its output end, wherein the calibration light from the calibration laser is provided to the transmitting optical fiber via the beam combining device.

[0011] In some embodiments, the beam combining device includes: a first coupler located at the output end of the first optical amplifier component, or a first dense wavelength division multiplexing (DWDM) filter included in the first optical amplifier component at the output end. In this embodiment, the first coupler should be changed from a 1*2 coupler to a 2*2 coupler.

[0012] In some embodiments, the optical head spatial optical path further includes an attenuation device configured to attenuate the calibration light output by the calibration laser to adjust the power of the calibration light; or the calibration laser includes a laser power regulator configured to adjust the output power of the calibration laser to adjust the power of the calibration light.

[0013] In some embodiments, the second optical amplifier assembly further includes a beam splitting device at its input end, and the calibration light from the receiving optical fiber is provided to the optical power detector via the beam splitting device.

[0014] In some embodiments, the beam splitting device includes a second coupler at the input end of the second optical amplifier assembly, the optical power detector includes a first input end optical power detector at the input end of the second optical amplifier assembly, and the calibration light is provided to the first input end optical power detector via the second coupler.

[0015] In some embodiments, the beam splitting device includes a second DWDM filter at the input end of the second optical amplifier assembly, the optical power detector includes a second additional optical power detector different from the first input end optical power detector at the input end of the second optical amplifier assembly, and the calibration light is provided to the second additional optical power detector via the second DWDM filter, and the output end of the second DWDM filter is connected to the second additional optical power detector via an optical fiber.

[0016] In some embodiments, the optical amplifier includes an erbium-doped fiber amplifier (EDFA).

[0017] In some embodiments, the laser transceiver device further includes a calibration controller communicably connected to the optical amplifier, the forward galvanometer, and the position detector, and the calibration controller is configured to: receive first measured first data from the position detector; receive second measured second data from the optical power detector; and determine the result of the optical axis self-calibration based on the first data and the second data.

[0018] According to a second aspect of the present invention, there is provided a method for optically axis self-calibration of the laser transceiver device according to the first aspect, and the laser transceiver device further includes a calibration controller communicatively connected to an optical amplifier, a pre-oscillating mirror, and a position detector. The method includes: using the calibration controller to adjust the position of the pre-oscillating mirror to an initial position; using the calibration controller to cause the pre-oscillating mirror to scan around the initial position; using the calibration controller to obtain first data regarding a first measurement from the position detector and second data regarding a second measurement from an optical power detector; and using the calibration controller to select power target data from the second data, and taking the state value of the pre-oscillating mirror corresponding to the power target data as the target calibration value of the pre-oscillating mirror, and taking the data in the first data corresponding to the power target data as the tracking position target value of the position detector.

[0019] In some embodiments, the calibration light includes the transmitted signal light output from the output end of the first optical amplifier assembly, and the method further includes: using the calibration controller to adjust the output power of the first optical amplifier assembly to a predetermined value.

[0020] In some embodiments, the calibration light includes the calibration light output from a calibration laser that is juxtaposed with the first optical amplifier assembly, and the method further includes: using the calibration controller to turn off the first optical amplifier assembly and adjust the output power of the calibration laser to a predetermined value.

[0021] According to a third aspect of the present invention, there is provided a machine-readable storage medium having machine-executable instructions stored thereon, wherein the machine-executable instructions are executed by a processor to implement the steps of the method according to the second aspect.

[0022] The beneficial effects of the present invention are as follows: In the laser transceiver device according to the present invention, calibration is performed by means of existing devices in a commonly used optical amplifier (e.g., EDFA) in laser communication in cooperation with the spatial optical path of the optical head. This solution directly multiplexes the transmitting fiber and the receiving fiber. Therefore, the calibration process of this solution does not require laboratory calibration, and the calibration result is not affected by the environment. The calibration effect is stable after being on orbit. Moreover, since existing components in the optical amplifier (e.g., EDFA) are directly multiplexed, there will be no additional cost increase or the cost change is extremely low, and it will not interfere with the original functions of the laser communication terminal. When the calibration fails, it will not have any impact on the functions of the laser communication terminal itself, ensuring the reliability of the laser communication terminal. Therefore, the optical amplifier (e.g., EDFA) fiber optical path and the spatial optical path of the optical head are combined to achieve the calibration function without affecting the original functions of the laser communication terminal, and the cost remains unchanged or changes minimally, and the implementation is simple.

[0023] It should be understood that the content described in the Summary of the Invention section is not intended to define the key or important features of the embodiments of the present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In conjunction with the accompanying drawings and with reference to the following detailed description, the above and other features, advantages, and aspects of the embodiments of the present invention will become more apparent. In the drawings, the same or similar reference numerals denote the same or similar elements, where:

[0025] Figure 1A shows a schematic structural diagram of a laser transceiver device according to some embodiments of the present invention;

[0026] Figure 1B shows a schematic structural diagram of a laser transceiver device according to some embodiments of the present invention;

[0027] Figure 2 shows a flowchart of a method for optical axis self-calibration of a laser transceiver device according to some embodiments of the present invention;

[0028] Figure 3 shows a flowchart of a method for optical axis self-calibration of a laser transceiver device according to some embodiments of the present invention for Figure 1A the laser transceiver device shown;

[0029] Figure 4 shows a flowchart of a method for optical axis self-calibration of a laser transceiver device according to some embodiments of the present invention for Figure 1B the laser transceiver device shown;

[0030] Figure 5 shows a schematic block diagram of an exemplary device implementing some embodiments of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] Various embodiments are now described with reference to the accompanying drawings, in which like reference numerals are used throughout to refer to like elements. In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. However, in some or all instances, it may be apparent that the following described embodiments may be practiced without the use of the specific design details described below. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate the description of one or more embodiments. A simplified overview of one or more embodiments is given below in order to provide a basic understanding of the embodiments. This overview is not an exhaustive overview of all contemplated embodiments, is not intended to identify all key or important elements of all embodiments, nor is it intended to define the scope of any or all embodiments.

[0032] References to "an embodiment" or "one embodiment" in the context of this description are intended to indicate that a particular configuration, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, phrases such as "in an embodiment" or "in one embodiment" that may appear in one or more places in this description do not necessarily refer to the same embodiment. Moreover, in one or more embodiments, the particular configurations, structures, or characteristics may be combined in any suitable manner.

[0033] Unless otherwise indicated, when referring to two elements that are connected together, this means a direct connection without any intermediate element other than a conductor; and when referring to two elements that are coupled together, this means that the two elements may be connected or they may be coupled via one or more other elements.

[0034] In the following disclosure, unless otherwise indicated, when referring to absolute position modifiers (such as the terms "front", "rear", "top", "bottom", "left", "right", etc.) or relative position modifiers (such as the terms "above", "below", "higher", "lower", etc.), or when referring to orientation modifiers (such as "horizontal", "vertical", etc.), it refers to the orientation shown in the figures. Unless otherwise specified, the expressions "about", "approximate", "substantially", and "approximately" mean within 10%, preferably within 5%.

[0035] In the following description, one or more specific details are set forth in order to provide an in-depth understanding of examples of embodiments of this description. Embodiments may be obtained without one or more of the specific details, or by using other methods, components, materials, etc. In other instances, well-known structures, materials, or operations have not been shown or described in detail so that certain aspects of the embodiments will not be obscured.

[0036] Throughout the accompanying drawings, like parts or elements are denoted by like reference numerals, and the corresponding descriptions will not be repeated for the sake of brevity. The reference numerals used herein are provided solely for convenience and thus do not define the scope of protection or the scope of the embodiments.

[0037] As described above, since the optical axis of the laser inter-satellite link terminal is coaxial calibrated on the ground optical state platform, after being put into orbit, due to the influence of atmospheric pressure, temperature, atmospheric turbulence, lead angle, etc., the optical axis will change accordingly, resulting in an axis deviation. For example, during the satellite launch process, the satellite will be affected by the vibration of the rocket launch booster and the release of gravity. When the space laser communication terminal is in orbit, the optical axes of the transmitting, receiving, and tracking and aiming optical paths of the laser communication terminal originally calibrated on the ground will have a certain amount of deviation. However, in this ultra-long-distance space communication, extremely small deviations in the calibration of the transmitting and receiving light beams will be amplified with the distance, which will seriously affect the efficiency and stability of the optical link, thereby increasing the difficulty of establishing an optical communication link between satellites. That is to say, the laser communication terminal is affected by environmental factors such as force, heat, and shock during actual use, resulting in the separation of the transmitting and receiving optical axes and the deviation of the tracking point. Therefore, it is necessary to calibrate the optical axis of the laser communication terminal. For example, the optical axis of the receiving mirror group needs to be aligned with the optical axis of the transmitting mirror group, and the optical axes of the receiving mirror group and the transmitting mirror group need to be aligned with the optical axis of the tracking mirror group respectively.

[0038] Traditional solutions usually add an additional set of optical paths and assume that the relative relationship between the added optical path and the original communication remains unchanged. By monitoring the change of the added optical path, the change of the optical axis is identified. However, this type of method requires calibrating the relationship between the communication optical path and the calibration optical path in the laboratory and repeatedly calibrating the relationship between the two in a vacuum chamber. The calibration process is complex, and it is impossible to ensure that the relative relationship does not change during the in-orbit process. This method requires beacon light-assisted calibration, which is difficult to debug and has a long cycle. The above methods cannot be carried out simultaneously with the communication light during the calibration process. Therefore, it is impossible to quickly, accurately, and real-time measure the off-axis amount and calibrate it in orbit.

[0039] In addition, some existing in-orbit calibrations usually require introducing many additional components and devices to complete the optical axis calibration function. This increases the calibration cost of the laser communication terminal, makes the equipment control function complex, may interfere with the original functions of the laser communication terminal, and reduces the reliability of the laser communication terminal.

[0040] In view of the above problems, some embodiments of the present invention provide a laser transceiver device with an optical axis self-calibration function. The laser transceiver device includes: an optical head spatial optical path and an optical amplifier. Among them, the optical head spatial optical path includes a transmitting mirror group, a receiving mirror group, an adjustable leading galvanometer located downstream of the transmitting mirror group, a tracking mirror group located downstream of the leading galvanometer, and a position detector located downstream of the tracking mirror group. The optical amplifier includes: a first optical amplifier component configured to be connected to the transmitting mirror group via a transmitting optical fiber; a second optical amplifier component configured to be connected to the receiving mirror group via a receiving optical fiber; a calibration light supply device configured to be associated with the first optical amplifier component to provide calibration light; and an optical power detector connected to the second optical amplifier component and configured to detect at least the power of the calibration light. When the leading galvanometer is adjusted for scanning, the calibration light is provided to the transmitting mirror group, and then at least via the leading galvanometer and the tracking mirror group to the position detector for the first measurement of optical axis self-calibration, and the calibration light passing through the receiving mirror group is provided to the optical power detector for the second measurement of optical axis self-calibration. The laser transceiver device according to the present invention uses existing devices in a common optical amplifier in laser communication to cooperate with the optical head spatial optical path for calibration, does not require laboratory calibration, does not require additional devices, and the calibration result is not affected by the environment.

[0041] The laser transceiver device with an optical axis self-calibration function according to some embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Figure 1A The structural schematic diagram of the laser transceiver device with an optical axis self-calibration function according to some embodiments of the present invention is shown; Figure 1B The structural schematic diagram of the laser transceiver device with an optical axis self-calibration function according to some embodiments of the present invention is shown. As Figure 1A and Figure 1B shown, the thick curve represents the optical fiber connection, the straight line represents the optical path, where the solid line with an arrow represents the optical path of the transmitted signal light, the dashed line with an arrow represents the optical path of the received signal light, and the dotted line with an arrow ( Figure 1B shown) represents the optical path of the dedicated calibration light emitted by the calibration laser. That is to say, optical fiber connections are used in the optical amplifier, and optical fiber connections are used between the optical amplifier and the optical head spatial optical path and the laser (not shown).

[0042] As Figure 1A and 1BAs shown, the laser transceiver device 1000 with an optical axis self-calibration function includes an optical head spatial optical path 100A. The optical head spatial optical path 100A includes at least a transmitting mirror group 102, an angle-adjustable leading galvanometer 103, a tracking mirror group 108, a position detector 109, and a receiving mirror group 110 along the optical path of the laser. The transmitting mirror group 102 has a transmitting optical axis, the receiving mirror group 110 has a receiving optical axis, and the tracking mirror group 108 has a tracking mirror group optical axis. Optical axis self-calibration requires aligning these three optical axes.

[0043] As Figure 1A and 1B shown, the laser transceiver device 1000 further includes an optical amplifier 100B. The optical amplifier 100B includes a calibration light supply device 101, a first optical amplifier component (e.g., a post-amplifier BA), a second optical amplifier component (e.g., a pre-amplifier PA), and an optical power detector 111. The calibration light supply device 101 is associated with, for example, the post-amplifier BA to provide calibration light by means of the existing post-amplifier BA, and the optical power detector 111 can be associated with, for example, the pre-amplifier PA to receive calibration light and signal light, etc. by means of the existing pre-amplifier PA. The post-amplifier BA of the EDFA is connected to the transmitting mirror group 102 through an existing transmitting optical fiber F1 at the port BA-OUT, and the pre-amplifier PA of the EDFA is connected to the receiving mirror group 110 through an existing receiving optical fiber F2 at the port PA-IN. In addition, the post-amplifier BA of the EDFA is connected to a transmitting laser (not shown) through an optical fiber at the port BA-IN, and the pre-amplifier PA of the EDFA is connected to a signal processor (not shown) through an existing optical fiber at the port PA-OUT.

[0044] In some embodiments, the optical amplifier 100B can be an Erbium-Doped Fiber Amplifier (EDFA), which can amplify optical signals in a fiber optic communication system, thereby enhancing the signal transmission distance and signal quality. The EDFA makes long-distance, high-capacity, and high-speed fiber optic communication possible. The post-amplifier BA of the EDFA operates on the transmission side or the emission side of the link and is placed behind the transmitter. The post-amplifier BA is used to boost the power of multiple wavelength signals and then transmit them. The pre-amplifier PA of the EDFA can operate at the receiving end of a Dense Wavelength Division Multiplexing (DWDM) link and is placed before the receiver end of the DWDM link. The pre-amplifier PA is used to compensate for the losses in the demultiplexer near the optical receiver and enhance the signal level before optical detection in an ultra-long-haul system, thereby improving the receiving sensitivity.

[0045] In some embodiments, as Figure 1A and 1BAs shown, the laser transceiver device may also include a calibration controller 100C, which can communicate with at least the optical amplifier 100B (for example, the calibration light supply device 101 and the optical power detector 111, etc.), the advance galvanometer 103 and the position detector 109, as shown by the dotted line in the figure.

[0046] In some embodiments, Figure 1A As shown, the signal light or the transmitted signal light from the post-optical amplifier BA can be directly used as the calibration light, that is, the post-optical amplifier BA can realize the function of the calibration light supply device, and the calibration light includes the transmitted signal light directly outputted from the output end of the post-optical amplifier BA. Figure 1A As shown, the post optical amplifier BA includes, for example, a BA gain device 114, etc. The gain device 114 can be used to emit signal light as calibration light.

[0047] In some embodiments, Figure 1B As shown, the calibration light supply device 101 may include a calibration laser 116. When the calibration laser 116 is working, the post optical amplifier BA may be turned off, so that the light from the calibration laser 116 is used as the calibration light. That is to say, the signal light emitted by the post optical amplifier BA is not used as the calibration light, but the calibration light is provided by another calibration laser 116. However, the calibration laser 116 is associated with the post optical amplifier BA to transmit the calibration light by means of its existing optical fiber optical path. Figure 1B In the illustrated embodiment, since a calibration laser 116 is included, the output end of the post optical amplifier BA further includes a beam combining device 113, which may include an output end coupler (in this case, the output end coupler should be changed from a 1*2 coupler to a 2*2 coupler) or a DWDM filter (not shown) located at the output end of the post optical amplifier BA, thereby providing the calibration light to the transmitting optical fiber F1 via the output end coupler or the DWDM filter. Figure 1A As shown, the post optical amplifier BA includes other devices besides the couplers or filters, such as a BA gain device 114, etc. When the calibration laser 116 is working, the BA gain device 114 can be turned off.

[0048] In some embodiments, Figure 1A and 1BAs shown, the calibration light from the calibration light supply device 101 is provided to the position detector 109 at least via the emission optical fiber F1, the emission mirror group 102, the pre-oscillating mirror 103, and the tracking mirror group 108. In this way, by detecting on the position detector 109, the data when the optical axes of the emission mirror group and the tracking mirror group are aligned can be detected. When the pre-oscillating mirror 103 is continuously adjusted to scan the calibration light, the position detector 109 can detect the position information of the light spot, thereby serving as a measurement of the optical axis self-calibration, and thus selecting the tracking feature value therefrom.

[0049] For example, as Figure 1A shown, the optical head spatial optical path 100A along the optical path of the laser further includes a dichroic mirror 104, an optical retroreflector 105, an attenuation device 106, a beam splitter 107, and a tracking mirror group 108 (for example, a fine tracking mirror group). The dichroic mirror 104 can divide the transmitted signal light into two paths, one path is transmitted as the signal light, and the other path is provided to the optical retroreflector 105 and the attenuation device 106. Then, the light returned from the optical retroreflector 105 can be used as the calibration light and guided to the beam splitter 107. The dichroic mirror 104 can also receive the received signal light from the outside. The attenuation device 106 can adjust the power of the calibration light to make it suitable for the parameters of the position detector and the receiving optical fiber. The beam splitter 107 can divide the calibration light into two paths, one path is provided to the tracking mirror group 108 (for example, the fine tracking mirror group) to reach the position detector, and the other path is provided to the receiving mirror group 110.

[0050] For example, as Figure 1A shown, the calibration light from the calibration light supply device 101 is provided to the position detector 109 via the emission optical fiber F1, the emission mirror group 102, the pre-oscillating mirror 103, the dichroic mirror 104, the optical retroreflector 105, the attenuation device 106, the beam splitter 107, and the tracking mirror group 108 (for example, the fine tracking mirror group) for spot measurement and the like. In addition, as Figure 1A shown, the signal light received by the dichroic mirror 104 can be provided to the position detector 109 via the beam splitter 107 and the tracking mirror group 108 (for example, the fine tracking mirror group), so as to also measure the spot of the received signal light, and the received signal light can also be provided to the receiving mirror group 110 to enter the optical amplifier.

[0051] As Figure 1B shown, the optical head spatial optical path 100A along the optical path of the laser further includes a dichroic mirror 104, an optical retroreflector 105, an optional attenuation device 106 (the dotted line indicates that this device can be omitted), a beam splitter 107, and a tracking mirror group 108 (for example, the fine tracking mirror group). Compared with the Figure 1A embodiment, Figure 1B the embodiment of can omit the attenuation device 106, but the attenuation device 106 can also be included inFigure 1B In the embodiment of. As Figure 1B shown, the calibration light from the calibration light supply device 101 (calibration laser 116) is provided to the position detector 109 via the transmitting optical fiber F1, the transmitting mirror group 102, the fast steering mirror 103, the dichroic mirror 104, the retroreflector 105, the optional attenuation device 106, the beam splitter 107, and the tracking mirror group 108 (for example, the fine tracking mirror group) for spot measurement and the like. In addition, as Figure 1B shown, the signal light received by the dichroic mirror 104 can be provided to the position detector 109 via the beam splitter 107 and the tracking mirror group 108 (for example, the fine tracking mirror group), so as to also measure the spot of the received signal light, and the received signal light can also be provided to the receiving mirror group 110 to enter the optical amplifier.

[0052] As Figure 1A and 1B shown, the optical amplifier 100B may further include an optical power detector 111. The calibration light passing through the receiving mirror group 110 is input to the optical power detector 111 through the receiving optical fiber F2 to detect the power of the calibration light, so as to be used for a measurement of optical axis self-calibration. In addition, the received signal light passing through the receiving mirror group 110 is also input to the optical power detector 111 through the receiving optical fiber F2 to detect the power of the signal light for power measurement of optical axis self-calibration.

[0053] As Figure 1A and 1B shown, before the calibration light is input to the optical power detector 111, the calibration light from the receiving optical fiber F2 needs to pass through the beam splitting device 112 at the input end of the preamplifier PA first. The beam splitting device 112 may include an input coupler or a DWDM filter (not shown) to provide the calibration light to the optical power detector 111. As shown in the figure, in addition to including these couplers or filters, the preamplifier PA further includes other devices, such as the PA gain device 115 and the like.

[0054] ​In the laser transceiver device according to the present invention, the transmitted signal light of the existing post - optical amplifier from the optical amplifier can be directly used as the calibration light. Alternatively, the calibration light can also be generated by the existing calibration laser 116 included in the optical amplifier. In either case, the existing components of the optical amplifier can provide the calibration light. Then the calibration light can be provided to the optical head spatial optical path through the existing transmission optical fiber, and then be provided to the position detector for spot measurement, etc. Using the existing receiving optical fiber, the calibration light and / or the signal light (the signal light is received by the dichroic mirror, for example, received through the receiving optical path formed by the dichroic mirror, beam splitter, receiving mirror group, etc.) from the optical head spatial optical path is provided to the optical amplifier. Then, the input coupler or DWDM filter (included in the existing beam splitting device) of the existing pre - optical amplifier PA in the optical amplifier splits the calibration light, and then the calibration light is provided to the power detector for power measurement, etc.

[0055] Therefore, the calibration light propagates between the optical amplifier and the optical head spatial optical path using the existing transmission optical fiber and receiving optical fiber. The corresponding bull's - eye tested by this scheme must be the bull's - eye corresponding to the transmission optical fiber and the receiving optical fiber. Since the existing laser communication in the optical amplifier (e.g., EDFA) itself uses the input coupler or output coupler or DWDM filter, and the existing EDFA for laser communication generally has an optical power detector, etc., the present invention can achieve optical axis self - calibration directly using the existing devices without additional devices.

[0056] Therefore, the laser transceiver device of the present invention uses the existing devices in a commonly used optical amplifier (e.g., EDFA) in laser communication to cooperate with the optical head spatial optical path for calibration. This scheme directly multiplexes the transmission optical fiber and the receiving optical fiber. Therefore, the calibration process of this scheme does not require laboratory calibration, and the calibration result is not affected by the environment. After being on orbit, the calibration effect is stable. And because it directly multiplexes the existing components in the optical amplifier (e.g., EDFA), it will not cause additional cost increase and will not interfere with the original functions of the laser communication terminal. When the calibration fails, it will not have any impact on the functions of the laser communication terminal itself, ensuring the reliability of the laser communication terminal. Therefore, the combination of the optical fiber optical path of the optical amplifier (e.g., EDFA) and the optical head spatial optical path realizes the calibration function and will not affect the original functions of the laser communication terminal, and the cost remains unchanged or changes minimally, and the implementation is simple.

[0057] In Figure 1AIn the described embodiment, the laser transceiver device with the function of optical axis self-calibration consists of an optical amplifier (e.g., EDFA) fiber optical path, an optical head spatial optical path, and a calibration controller. The optical amplifier fiber optical path includes a post-amplifier (BA), a beam splitting device (usually a DWDM filter or a coupler, or an optical switch) at the input end of the pre-amplifier (PA), and an optical power detector. The optical head spatial optical path consists of a transmitting mirror group, a pre-oscillating mirror, a dichroic mirror (DM), an attenuation device, an optical retroreflector, a beam splitter, a fine tracking mirror group, a position detector, and a receiving mirror group. The calibration controller consists of a control single board and control software, and the components of the optical head spatial optical path are connected by an optical path. The optical amplifier fiber optical path and the optical head spatial optical path are connected by a fiber. The BA of the optical amplifier is connected to the transmitting mirror group of the optical head spatial optical path through a fiber, and the PA of the optical amplifier is connected to the receiving mirror group of the optical head spatial optical path through a fiber. The calibration controller is connected to the optical amplifier and the pre-oscillating mirror and the position detector in the spatial optical path of the optical head through a circuit.

[0058] In the embodiment as Figure 1A shown, the fiber optical path part of the optical amplifier 100B (e.g., EDFA) of the device consists of a post-amplifier BA, a coupler or a DWDM filter at the input end of the pre-amplifier PA, and an optical power detector. The device uses the transmitted signal light as the calibration light. The calibration light enters the transmitting mirror group 102 through the transmitting fiber F1 and then is output to the pre-oscillating mirror 103, and after being emitted by the pre-oscillating mirror 103, it is output to the dichroic mirror 104. The transmitted signal light is split into two beams of light on the dichroic mirror 104. One of them is emitted as the signal light, and the other is output as the calibration light to the optical retroreflector 105 after passing through the dichroic mirror 104. The optical retroreflector 105 generally selects a corner cube, or can also be a reflector, a grating, etc. An attenuation device 106 can be set between the dichroic mirror and the optical retroreflector to adjust the optical power of the calibration light in the position detector 109 and the receiving fiber F2. In some examples, the attenuation device 106 can be an attenuation sheet, a diaphragm, or a filter, etc.

[0059] The calibration light returns to the dichroic mirror 104 after passing through the optical retroreflector 105. At this time, the light beam output from the dichroic mirror 104 to the beam splitter 107 can be selected as the calibration light. The beam splitter 107 divides the calibration light into two new calibration lights. One of the calibration lights is output to the tracking mirror group 108 (for example, the fine tracking mirror group) through the optical path and then output to the position detector 109. The position detector 109 feeds back the position information according to the received light spot as the tracking feature value. In addition, the other calibration light is coupled into the receiving optical fiber F2 through the receiving mirror group 110 and then output to the input end of the preamplifier PA. After passing through the beam splitting device 112 provided at the input end of the preamplifier PA, the calibration light enters the optical power detector 111. The input part of the preamplifier PA (i.e., the beam splitting device) can include an input coupler (not shown) or a DWDM filter (not shown).

[0060] In some embodiments, if the input coupler of the preamplifier PA is selected to guide the calibration light, the input coupler of the preamplifier PA needs to be placed before the input DWDM filter, that is, the calibration light first passes through the input coupler of the preamplifier PA and then passes through the DWDM filter. At this time, the original input optical power detector of the preamplifier PA can be directly used as the optical power detector 111 for calibration.

[0061] In some embodiments, the input DWDM filter of the preamplifier PA can be selected. The order of the input coupler and the DWDM filter of the preamplifier PA does not affect the calibration function, but the other output port of the DWDM filter needs to be connected to the optical power detector 111 through an optical fiber. The optical power detector 111 can be a newly added optical power detector, which is different from the original input optical power detector of the preamplifier PA.

[0062] In such as Figure 1BIn the described embodiment, the laser transceiver with the optical axis self-calibration function is also composed of an optical amplifier (e.g., EDFA) optical fiber path, an optical head spatial optical path, and a calibration controller. The optical amplifier optical fiber path includes a beam combining device (generally a DWDM filter, or a coupler) at the output end of the post-optical amplifier (BA), a beam splitting device (generally a DWDM filter or a coupler, or an optical switch) at the input end of the pre-optical amplifier (PA), and an optical power detector. The optical head spatial optical path is composed of a transmitting mirror group, a leading galvanometer, a dichroic mirror (DM), an optical reflector, a beam splitter, a precision tracking mirror group, a position detector, and a receiving mirror group. The calibration controller is composed of a control board and control software, and the components of the optical head spatial optical path are connected through an optical path. The optical amplifier optical fiber path and the optical head spatial optical path are connected through optical fibers, and the BA of the optical amplifier is connected to the transmitting mirror group of the optical head spatial optical path through optical fibers at the output end, and the PA of the optical amplifier is connected to the receiving mirror group of the optical head spatial optical path through optical fibers at the input end. The calibration controller and the optical amplifier as well as the leading galvanometer and the position detector in the spatial optical path of the optical head are connected through a circuit.

[0063] In such Figure 1B In the laser transceiver device shown, the optical fiber optical path portion of the optical amplifier 100B (for example, EDFA) of the device is composed of a calibration laser 116, a coupler or DWDM filter at the output end of the post-optical amplifier BA, a coupler or DWDM filter at the input end of the pre-optical amplifier PA, and an optical power detector. Figure 1B The configuration of the pre-optical amplifier PA part of the device is Figure 1A The devices shown are identical except that Figure 1B The device uses the output light of the independent calibration laser 116 as calibration light.

[0064] like Figure 1B As shown, the calibration laser 116 emits calibration light and then passes through the coupler or DWDM filter at the output end of the BA to combine with the signal light into one beam. Usually, the output end of the BA has a DWDM filter to reduce the crosstalk of the transmitted signal light to the received signal light, but there is an idle input port of the DWDM filter. Figure 1B The calibration laser 116 is connected to the port through an optical fiber, so that the calibration light and the transmission signal light are combined into one beam of light. Similarly, if the existing DWDM filter is not used, an output end coupler can be used to achieve the same function, but it is preferred to use the existing DWDM filter. If the post-optical amplifier BA does not include a DWDM filter under special circumstances, a new DWDM filter or coupler can be added to achieve the same function.

[0065] The calibration light enters the transmitting mirror group 102 through the transmitting optical fiber F1 and is then output to the leading galvanometer 103. After being emitted by the leading galvanometer 103, it is output to the dichroic mirror 104, and the dichroic mirror 104 outputs the calibration light to the optical retroreflector 105. The optical retroreflector 105 generally selects a corner cube, and can also be a reflector, a grating, etc. Figure 1B For the laser transceiver device, an attenuation device 106 can be selected to be added between the dichroic mirror 104 and the optical retroreflector 105 to adjust the optical power of the calibration light in the position detector and the receiving optical fiber. In some examples, the attenuation device can be an attenuation sheet, a diaphragm, or a filter, etc. Figure 1B For the laser transceiver device, it can also be selected to adjust the optical power of the calibration light in the position detector 109 and the receiving optical fiber F2 by adjusting the output power of the calibration laser 116 without adding other components between the dichroic mirror and the optical retroreflector.

[0066] After passing through the optical retroreflector 105, the calibration light returns to the dichroic mirror 104. At this time, the light beam output from the dichroic mirror 104 to the beam splitter 107 is used as the calibration light. The beam splitter 107 divides the calibration light into two new calibration lights. One path is output to the tracking mirror group 108 (for example, the fine tracking mirror group) through the optical path and then output to the position detector 109. The position detector 109 feeds back the position information according to the received light spot as the tracking feature value. The other path of the calibration light is coupled into the receiving optical fiber F2 through the receiving mirror group 110 and output to the input end of the pre - optical amplifier PA. After passing through the beam splitting device 112, the calibration light enters the optical power detector 111. Usually, the input part (i.e., the beam splitting device) of the PA contains both an input end coupler and a DWDM filter.

[0067] In some embodiments, if the input end coupler of the pre - optical amplifier PA is selected to guide the calibration light, the input end coupler of the pre - optical amplifier PA needs to be placed before the input end DWDM filter, that is, the calibration light first passes through the input end coupler of the pre - optical amplifier PA and then passes through the DWDM filter. At this time, the original input end optical power detector of the pre - optical amplifier PA can be directly used as the optical power detector for calibration.

[0068] In some embodiments, if the input end DWDM filter of the pre - optical amplifier PA is selected, the order of the input end coupler and the DWDM filter of the pre - optical amplifier PA does not affect the calibration function, but the other output port of the DWDM needs to be connected to the optical power detector 111 through an optical fiber. The optical power detector 111 can be a newly added optical power detector, which is different from the original input end optical power detector of the pre - optical amplifier PA.

[0069] Figure 2 The flowchart of the method 200 for optical axis self - calibration of a laser transceiver device according to an embodiment of the present invention is shown.

[0070] like Figure 2 As shown, in step 210, the position of the leading galvanometer is adjusted to an initial position using a calibration controller. The initial position can be a laboratory calibration value of the laser transceiver when it is factory set. In a laboratory environment, at the initial position, the optical axis of the transmitting mirror assembly, the optical axis of the receiving mirror assembly, and the optical axis of the tracking mirror assembly are aligned with each other.

[0071] In step 220, a calibration controller is used to make the leading galvanometer scan around the initial position. That is, the angle of the leading galvanometer changes, and the change is performed around the initial position. In step 230, a calibration controller is used to obtain first data about the first measurement from the position detector and second data about the second measurement from the optical power detector. For example, during the scanning process, the calibration controller can record the camera spot centroid reading of the position detector 109 and the power reading of the optical power detector 111 at each scanning point.

[0072] In step 240, a calibration controller is used to select power target data from the second data, and the state value of the leading galvanometer corresponding to the power target data is used as the target calibration value of the leading galvanometer, and the data corresponding to the power target data in the first data is used as the tracking position target value of the position detector. The data about the first measurement includes the characteristic value of the position detector and the state value (angle) of the leading galvanometer. The second data about the second measurement includes the value of the optical power detector. The target value of the leading galvanometer is the state value of the corresponding power target data of the leading galvanometer (this is to correct the coaxiality of the transmission and reception), and the specific first data associated with the power target data is the tracking position target value of the position detector (this is to correct the pointing position of the tracking and receiving optical axis), and the tracking position target value can also be called the tracking point or tracking point or tracking position characteristic value. For example, after completing the scanning of the predetermined range, the calibration controller compares all the optical power detector readings, selects a group of data with the highest corresponding power in the optical power detector readings, and records the corresponding result of the highest power value of the optical power detector, which can be used as the calibration setting of the leading galvanometer and the calibration characteristic value of the position detector (for example, the position or energy ratio of the light spot).

[0073] When the calibration light is provided by the post-optical amplifier, in addition to adjusting the position of the lead galvanometer to the initial position, the output power of the post-optical amplifier needs to be adjusted to an appropriate power so that the power of the calibration light can be suitable for the subsequent position detector and receiving optical fiber. When the calibration light is provided by the calibration light laser, in addition to adjusting the position of the lead galvanometer to the initial position, the output power of the calibration light laser needs to be adjusted to an appropriate power so that the power of the calibration light can be suitable for the subsequent position detector and receiving optical fiber.

[0074] Figure 3 shows a flowchart of a method 300 for optical axis self-calibration of a laser transceiver device according to the Figure 1A illustrated embodiment.

[0075] After starting the calibration process, in step 310, the calibration controller sets the output power of the post-amplifier BA of the EDFA and the position of the leading galvanometer to predetermined values. The predetermined values can be the initial values calibrated in the laboratory. In the laboratory environment, at these initial values, the optical axes of the transmitting mirror group and the receiving mirror group are aligned, and are respectively aligned with the optical axis of the tracking mirror group. However, due to the influence of heat and force during on-orbit operation, these optical axes become misaligned.

[0076] During the calibration process, in step 320, the calibration controller 100C controls the leading galvanometer 103 to scan near the predetermined value and records the centroid reading of the camera spot of the position detector 109 and the reading of the optical power detector 111 at each scan point.

[0077] When the scanning of the predetermined range is completed, in step 330, the calibration controller 100C compares all the readings of the optical power detector 111 and selects a set of data with the highest corresponding reading among the readings of the optical power detector. In step 340, the corresponding results of the highest power value of the detector are recorded, and are respectively recorded as the corresponding setting of the leading galvanometer 103 and the eigenvalue of the position detector 109. In step 350, the calibration controller 100C sets the corresponding setting of the leading galvanometer as the default setting of the leading galvanometer, and sets the eigenvalue of the position detector as the tracking point or the tracking position eigenvalue. At this time, the optical axis self-calibration is completed.

[0078] Figure 4 shows a flowchart of a method 400 for optical axis self-calibration of a laser transceiver device according to the Figure 1B illustrated embodiment.

[0079] After starting the calibration process, in step 420, the calibration controller 100C controls the post-amplifier BA to turn off, and sets the calibration laser 116 and the leading galvanometer 103 to predetermined values. In step 420, the calibration controller 100C controls the leading galvanometer 103 to scan near the predetermined value and records the centroid reading of the camera spot and the reading of the optical power detector at each scan point.

[0080] In step 430, after the scanning of the predetermined range is completed, the calibration controller 100C compares all the detector readings and selects a set of data corresponding to the highest power among the detector readings. In step 440, the results corresponding to the highest detector power value are recorded and are respectively recorded as the corresponding settings of the leading galvanometer and the eigenvalue of the position detector. In step 450, the calibration controller 100C sets the corresponding settings of the leading galvanometer as the default settings of the leading galvanometer, and sets the eigenvalue of the position detector as the tracking point or the tracking position eigenvalue. At this time, the optical axis calibration is completed.

[0081] Figure 5 FIG. shows a schematic block diagram of an exemplary device 500 that can be used to implement embodiments of the present invention. The exemplary device 500 can be an embodiment of the calibration controller 100C as shown in Figure 1A and 1B As shown in the figure, the device 500 includes a computing unit 501, which can perform various appropriate actions and processes according to computer program instructions stored in a read-only memory (ROM) 502 or computer program instructions loaded from a storage unit 508 into a random access memory (RAM) 503. In the RAM 503, various programs and data required for the operation of the device 500 can also be stored. The computing unit 501, the ROM 502, and the RAM 503 are connected to each other through a bus 504. An input / output (I / O) interface 505 is also connected to the bus 504.

[0082] Multiple components in the device 500 are connected to the I / O interface 505. For example, it may include: an input unit 506, such as a keyboard, a mouse, etc.; an output unit 507, such as various types of displays, speakers, etc.; a storage unit 508, such as a magnetic disk, an optical disc, etc.; and a communication unit 509, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 509 allows the device 500 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0083] The computing unit 501 can be various general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of the computing unit 501 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various computing units running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. The computing unit 501 executes the various methods and processes described above, such as methods 200 to 400. For example, in some embodiments, methods 200 to 400 may be implemented as a computer software program tangibly embodied in a machine-readable medium, such as the storage unit 508. In some embodiments, part or all of the computer program may be loaded and / or installed onto the device 500 via the ROM 502 and / or the communication unit 509. When the computer program is loaded into the RAM 503 and executed by the computing unit 501, one or more steps of methods 200 to 400 described above may be executed. Alternatively, in other embodiments, the computing unit 501 may be configured to execute methods 200 to 400 in any other suitable manner (e.g., by means of firmware).

[0084] The functions described above herein can be performed at least in part by one or more hardware logic components. For example, without limitation, exemplary types of hardware logic components that may be used include: field programmable gate arrays (FPGA), application specific integrated circuits (ASIC), application specific standard products (ASSP), system on a chip systems (SOC), complex programmable logic devices (CPLD), and so on.

[0085] The program code for implementing the methods of the present invention can be written in any combination of one or more programming languages. These program codes can be provided to a processor or controller of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when the program codes are executed by the processor or controller, the functions / operations specified in the flowchart and / or block diagram are implemented. The program code can be executed entirely on the machine, partially on the machine, as an independent software package partially on the machine and partially on a remote machine, or entirely on a remote machine or server.

[0086] In the context of the present invention, a machine-readable medium can be a tangible medium that can contain or store a program for use by or in connection with an instruction execution system, apparatus, or device. The machine-readable medium can be a machine-readable signal medium or a machine-readable storage medium. The machine-readable medium can include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination of the foregoing. More specific examples of the machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. Further, although the operations are depicted in a particular order, this should be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed to achieve the desired result. In certain environments, multitasking and parallel processing may be advantageous. Similarly, although a number of specific implementation details are included in the above discussion, these should not be construed as limiting the scope of the present invention. Certain features that are described in the context of separate embodiments can also be implemented in combination in a single implementation. Conversely, the various features that are described in the context of a single implementation can also be implemented separately or in any suitable sub-combination in multiple implementations.

[0087] Although the subject matter has been described in language specific to structural features and / or methodological acts, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are merely example forms of implementing the claims.

Claims

1. A laser transceiver device with an optical axis self-calibration function, characterized in that: include: The optical head spatial optical path includes a transmitting mirror group, a receiving mirror group, an adjustable leading galvanometer mirror located downstream of the transmitting mirror group, a tracking mirror group located downstream of the leading galvanometer mirror, and a position detector located downstream of the tracking mirror group; as well as Optical amplifiers, including: a first optical amplifier assembly configured to be connected to the transmitting mirror assembly via a transmitting optical fiber; a second optical amplifier assembly configured to be connected to the receiving mirror assembly via a receiving optical fiber; a calibration light supply device, configured to be associated with the first optical amplifier assembly to provide calibration light; and an optical power detector connected to the second optical amplifier assembly and configured to detect at least the power of the calibration light; and Wherein, when the lead galvanometer is adjusted for scanning, the calibration light is provided to the transmitting mirror group, and then provided to the position detector via at least the lead galvanometer and the tracking mirror group to perform a first measurement of the optical axis self-calibration, and the calibration light is provided to the optical power detector via the receiving mirror group to perform a second measurement of the optical axis self-calibration, The second optical amplifier assembly further comprises a light splitting device at its input end, wherein the calibration light from the receiving optical fiber is provided to the optical power detector via the optical splitter, wherein the optical splitting device comprises a second dense wavelength division multiplexing filter located at the input end of the second optical amplifier assembly, The optical power detector includes a second additional optical power detector different from an input end optical power detector located at the input end of the second optical amplifier assembly, and The calibration light is provided to the second additional optical power detector via the second dense wavelength division multiplexing filter, and an output end of the second dense wavelength division multiplexing filter is connected to the second additional optical power detector via an optical fiber.

2. The laser transceiver device according to claim 1, characterized in that: The calibration light includes a transmission signal light output from an output end of the first optical amplifier component; and The optical head spatial light path also includes an attenuation device, which is configured to attenuate the calibration light to adjust the power of the calibration light.

3. The laser transceiver device according to claim 2, characterized in that: The optical head spatial light path also includes: a dichroic mirror located downstream of the lead mirror and upstream of the tracking mirror set; and a light retroreflector located downstream of the dichroic mirror; wherein the dichroic mirror is configured to emit a first portion of the emission signal light from the lead galvanometer as signal light, and output a second portion of the emission signal light from the lead galvanometer to the light reflector and receive laser light returned from the light reflector as the calibration light, and The attenuation device is arranged between the dichroic mirror and the light retroreflector.

4. The laser transceiver device according to claim 1, characterized in that: The calibration light supply device comprises a calibration laser arranged in the optical amplifier and juxtaposed with the first optical amplifier component, and The first optical amplifier assembly includes a beam combining device at an output end thereof, wherein the calibration light from the calibration laser is provided to the transmitting optical fiber via the beam combining device.

5. The laser transceiver device according to claim 4, characterized in that: The beam combining device comprises: a first coupler at the output end of the first optical amplifier assembly, or The first optical amplifier assembly comprises a first dense wavelength division multiplexing filter located at the output end.

6. The laser transceiver device according to claim 4, characterized in that: The optical head spatial optical path further includes an attenuation device, which is configured to attenuate the calibration light output by the calibration laser to adjust the power of the calibration light; or The calibration laser includes a laser power regulator configured to adjust the output power of the calibration laser to adjust the power of the calibration light.

7. The laser transceiver device according to any one of claims 1 to 6, characterized in that: The optical amplifier comprises an erbium-doped fiber amplifier.

8. The laser transceiver device according to any one of claims 1 to 6, further comprising a calibration controller communicatively connected to the optical amplifier, the lead galvanometer and the position detector, The calibration controller is configured as follows: receiving first data of the first measurement from the position detector; receiving second data of the second measurement from the optical power detector; and A result of the optical axis self-calibration is determined based on the first data and the second data.

9. A method for performing optical axis self-calibration on the laser transceiver according to claim 1, wherein the laser transceiver further comprises a calibration controller communicatively connected to the optical amplifier, the lead galvanometer and the position detector, the method comprising: By means of the calibration controller, the position of the leading galvanometer is adjusted to an initial position; Allowing the leading galvanometer to scan around the initial position; Acquire first data from the position detector regarding the first measurement and second data from the optical power detector regarding the second measurement; as well as Power target data is selected from the second data, and the state value of the leading galvanometer corresponding to the power target data is used as the target calibration value of the leading galvanometer, and the data corresponding to the power target data in the first data is used as the tracking position target value of the position detector.

10. The method according to claim 9, characterized in that The calibration light includes a transmission signal light output from an output end of the first optical amplifier component, and the method further includes: The calibration controller is used to adjust the output power of the first optical amplifier component to a predetermined value.

11. The method according to claim 9, characterized in that The calibration light comprises calibration light output from a calibration laser connected in parallel with the first optical amplifier assembly, and the method further comprises: Using the calibration controller, the first optical amplifier component is turned off and the output power of the calibration laser is adjusted to a predetermined value.

12. A machine-readable storage medium having machine-executable instructions stored thereon, wherein the machine-executable instructions are executed by a processor to implement the steps of the method according to any one of claims 9 to 11.

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