Laser transmitting and receiving device, method for carrying out optical axis self-calibration on laser transmitting and receiving device and machine readable storage medium

Abstract

The invention relates to a laser transmitting and receiving device, a method for carrying out optical axis self-calibration on the laser transmitting and receiving device and a machine readable storage medium. An optical amplifier of the device comprises: a first optical amplifier assembly configured to be connected to a transmitting mirror group via a transmitting optical fiber; a second optical amplifier assembly configured to be connected to the receiving lens group 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. In a case where the lead galvanometer is adjusted to scan, the calibration light is provided to the position detector to perform 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 to perform a second measurement of optical axis self-calibration. According to the laser transmitting and receiving device, calibration is carried out by means of existing devices, laboratory calibration is not needed, and the calibration result is not affected by the environment.

Description

Technical Field

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

[0002] Space laser communication technology combines the advantages of radio communication and fiber optic communication, using laser as carrier and atmosphere as 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 intersatellite link terminal is coaxially calibrated on the ground optical state platform, the optical axis will change and produce axis deviation after entering orbit due to the influence of atmospheric pressure, temperature, atmospheric turbulence, lead angle, etc. For example, in actual use, the laser communication terminal is affected by environmental factors such as force and heat, resulting in separation of the light-receiving and light-emitting axes and deviation of the tracking point.

[0003] Traditional solutions usually add an additional set of optical paths and assume that the relative relationship between the additional optical paths and the original communication paths remains unchanged. The changes in the optical axis are identified by monitoring the changes in the additional optical paths. However, this 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 tank. The calibration process is complicated and there is no guarantee that the relative relationship will not change during the orbit.

[0004] In addition, some existing on-orbit calibrations usually require the introduction of many additional components and devices to complete the optical axis calibration function, which increases the calibration cost of the laser communication terminal, complicates the equipment control function, and may interfere with the function of the original laser communication terminal, thereby reducing the reliability of the laser communication terminal.

[0005] In summary, the traditional optical axis self-calibration solution has the following shortcomings: 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 with an optical axis self-calibration function, a method for performing optical axis self-calibration on the laser transceiver, and a machine-readable storage medium. The laser transceiver can be calibrated with the help of existing devices, does not require laboratory calibration, and the calibration results are not affected by the environment.

[0007] According to a first aspect of the present invention, a laser transceiver device with an optical axis self-calibration function is provided. The laser transceiver device comprises: an optical head spatial optical path and an optical amplifier, wherein the optical head spatial optical path comprises 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 comprises: 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 at least detect 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 provided to the position detector via at least the leading galvanometer and the tracking mirror group to perform a first measurement of the optical axis self-calibration, and the calibration light through the receiving mirror group is provided to the optical power detector to perform a second measurement of the optical axis self-calibration.

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

[0009] In some embodiments, the spatial optical path of the optical head also includes: a dichroic mirror located downstream of the lead galvanometer and upstream of the tracking mirror group; and a light reflector 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 and use it as calibration light, and wherein an attenuation device is disposed between the dichroic mirror and the light reflector.

[0010] In some embodiments, the calibration light supply device includes a calibration laser arranged in the optical amplifier and juxtaposed with the first optical amplifier component, and the first optical amplifier component includes a beam combining device located 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 located at the output end of the first optical amplifier component. In this embodiment, the first coupler should be changed from a 1*2 coupler to a 2*2 coupler.

[0012] In some embodiments, the spatial optical path of the optical head also 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, which is 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 comprises a light splitting device located at an input end thereof, wherein the calibration light from the receiving optical fiber is provided to the optical power detector via the light splitting device.

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

[0015] In some embodiments, the optical splitting device includes a second DWDM filter located at the input end of the second optical amplifier component, the optical power detector includes a second additional optical power detector that is different from the first input end optical power detector at the input end of the second optical amplifier component, 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 comprises an erbium doped fiber amplifier EDFA.

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

[0018] According to the second aspect of the present invention, a method for self-calibrating the optical axis of the laser transceiver according to the first aspect is provided, wherein the laser transceiver further comprises a calibration controller communicatively connected to the optical amplifier, the lead galvanometer and the position detector. The method comprises: using the calibration controller to adjust the position of the lead galvanometer to an initial position; using the calibration controller to make the lead galvanometer scan around the initial position; using the calibration controller to obtain first data about the first measurement from the position detector and second data about the second measurement from the optical power detector; and using the calibration controller to select power target data from the second data, and using the state value of the lead galvanometer corresponding to the power target data as the target calibration value of the lead galvanometer, and using the data corresponding to the power target data in the first data as the tracking position target value of the position detector.

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

[0020] In some embodiments, the calibration light includes calibration light output from a calibration laser in parallel with the first optical amplifier component, and the method further includes: using a calibration controller to turn off the first optical amplifier component 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 effect of the present invention is that in the laser transceiver device according to the present invention, the existing devices in the optical amplifier (for example, EDFA) commonly used in laser communication are used in conjunction with the optical head space optical path for calibration. This scheme directly multiplexes the transmitting optical fiber and the receiving optical fiber, so the calibration process of this scheme does not require laboratory calibration, and the calibration result is not affected by the environment, and the calibration effect is stable after being on track. In addition, since the existing components in the optical amplifier (for example, EDFA) are directly multiplexed, there will be no additional cost increase or the cost change is extremely low, and there will be no interference with the original function of the laser communication terminal. When the calibration fails, it will not have any impact on the function of the laser communication terminal itself, ensuring the reliability of the laser communication terminal. Therefore, the optical fiber optical path of the optical amplifier (for example, EDFA) is combined with the optical head space optical path to realize the calibration function and will not affect the original function of the laser communication terminal, and the cost does not change or changes very little, and the implementation is simple.

[0023] It should be understood that the contents described in the summary of the invention are not intended to limit the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and other features, advantages and aspects of the embodiments of the present invention will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. In the accompanying drawings, the same or similar reference numerals represent the same or similar elements, wherein: Figure 1A A schematic diagram of the structure of a laser transceiver device according to some embodiments of the present invention is shown; Figure 1B A schematic diagram of the structure of a laser transceiver device according to some embodiments of the present invention is shown; Figure 2 A flow chart of a method for performing optical axis self-calibration on a laser transceiver device according to some embodiments of the present invention is shown; Figure 3 Some embodiments of the present invention are shown for Figure 1A A flow chart of a method for performing self-calibration of an optical axis by a laser transceiver device as shown; Figure 4 Some embodiments of the present invention are shown for Figure 1B A flow chart of a method for performing self-calibration of an optical axis by a laser transceiver device as shown; Figure 5 A schematic block diagram of an example device implementing some embodiments of the invention is shown. DETAILED DESCRIPTION

[0025] Various embodiments are now described with reference to the accompanying drawings, wherein throughout the text, similar reference numerals are used to refer to similar elements. In the following description, for the purpose of explanation, many specific details are set forth to facilitate a thorough understanding of one or more embodiments. However, it may be clear in some or all cases that any embodiment described below can be practiced without adopting the specific design details described below. In other examples, known structures and devices are shown in block diagram form to facilitate description of one or more embodiments. A simplified overview of one or more embodiments is given below to provide a basic understanding of the embodiments. This overview is not an exhaustive overview of all contemplated embodiments, is not intended to identify the key or important elements of all embodiments, and is not intended to define the scope of any or all embodiments.

[0026] References to "an embodiment" or "one embodiment" in the framework of this description are intended to indicate that a particular configuration, structure, or characteristic described with respect to the embodiment is included in at least one embodiment. Thus, phrases such as "in an embodiment" or "in an embodiment" that may be present in one or more points of this description do not necessarily refer to the same embodiment. Furthermore, in one or more embodiments, particular configurations, structures, or characteristics may be combined in any appropriate manner.

[0027] Unless otherwise indicated, when referring to two elements being connected together, this means a direct connection without any intermediate elements other than conductors; and when referring to two elements being coupled together, this means the two elements may be connected or they may be coupled via one or more other elements.

[0028] In the following disclosure, unless otherwise indicated, when 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.) are mentioned, or when directional modifiers (such as "horizontal", "vertical", etc.) are mentioned, the orientation shown in the figure is referred to. Unless otherwise specified, the expressions "about", "approximately", "substantially" and "approximately" mean within 10%, preferably within 5%.

[0029] In the following description, one or more specific details are explained to provide a deeper understanding of the examples of the embodiments of the present description. The embodiments can be obtained without one or more specific details, or with other methods, components, materials, etc. In other cases, well-known structures, materials, or operations are not illustrated or described in detail so that some aspects of the embodiments will not be obscured.

[0030] Throughout the drawings attached hereto, the same components or elements are indicated by the same reference numerals, and the corresponding description will not be repeated for the sake of brevity. The reference numerals used herein are provided only for convenience and therefore do not define the degree of protection or the scope of the embodiments.

[0031] As mentioned above, since the optical axis of the laser intersatellite link terminal is coaxially calibrated on the ground optical state platform, the optical axis will change and produce axis deviation after entering orbit due to the influence of atmospheric pressure, temperature, atmospheric turbulence, lead angle, etc. For example, due to the influence of rocket launch thruster vibration, gravitational release, etc. during satellite launch, when the space laser communication terminal is in orbit, the optical axis of the transmission, reception and tracking optical path of the laser communication terminal originally calibrated on the ground will produce a certain amount of deviation. However, in such ultra-long-distance space communication, extremely small deviations in the calibration of the transmitting and receiving light beams will be magnified 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. In other words, in actual use, the laser communication terminal is affected by environmental factors such as force, heat, and impact, resulting in the separation of the receiving and transmitting light 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 axis of the receiving mirror group and the optical axis of the transmitting mirror group need to be aligned with the optical axis of the tracking mirror group respectively.

[0032] Traditional solutions usually add an additional set of optical paths and assume that the relative relationship between the added optical paths and the original communication paths remains unchanged. Changes in the optical axis are identified by monitoring the changes in the added optical paths. 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 tank. The calibration process is complicated, and there is no guarantee that the relative relationship will not change during the on-orbit process. This method requires beacon light to assist in calibration, which is difficult to debug and has a long cycle. The above methods cannot be performed simultaneously with the communication light during the calibration process, so it is impossible to quickly, accurately, and in real time measure the off-axis amount and calibrate on-orbit.

[0033] In addition, some existing on-orbit calibrations usually require the introduction of many additional components and devices to complete the optical axis calibration function, which increases the calibration cost of the laser communication terminal, complicates the equipment control function, and may interfere with the function of the original laser communication terminal, thereby reducing the reliability of the laser communication terminal.

[0034] 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, wherein 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 at least detect 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 provided to the position detector via at least the leading galvanometer and the tracking mirror group to perform a first measurement of the optical axis self-calibration, and the calibration light through the receiving mirror group is provided to the optical power detector to perform a second measurement of the optical axis self-calibration. The laser transceiver device according to the present invention is calibrated with the help of existing devices in optical amplifiers commonly used in laser communications in conjunction with the spatial optical path of the optical head. It does not require laboratory calibration, does not require additional devices, and the calibration results are not affected by the environment.

[0035] The following will describe in detail a laser transceiver device with an optical axis self-calibration function according to some embodiments of the present invention in conjunction with the accompanying drawings. Figure 1A A schematic diagram of the structure of a laser transceiver device with an optical axis self-calibration function according to some embodiments of the present invention is shown; Figure 1B FIG. 1 is a schematic diagram showing the structure of a laser transceiver device with an optical axis self-calibration function according to some embodiments of the present invention. Figure 1A and Figure 1B As shown, the thick curve represents the optical fiber connection, the straight line represents the optical path, the solid line with an arrow represents the optical path of the transmitted signal light, the dotted line with an arrow represents the optical path of the received signal light, and the dotted line with an arrow ( Figure 1B ) represents the optical path of the special calibration light emitted by the calibration laser. That is to say, optical fiber connection is adopted in the optical amplifier, and optical fiber connection is adopted between the optical amplifier and the optical head spatial optical path and the laser (not shown).

[0036] like Figure 1A and 1BAs shown, the laser transceiver device 1000 with the optical axis self-calibration function includes an optical head spatial optical path 100A, and 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. The optical axis self-calibration requires that these three optical axes be aligned.

[0037] like Figure 1A and 1B As shown, the laser transceiver 1000 also 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-optical amplifier BA), a second optical amplifier component (e.g., a pre-optical amplifier PA), and an optical power detector 111. The calibration light supply device 101 is associated with, for example, the post-optical amplifier BA to provide calibration light with the help of the existing post-optical amplifier BA, and the optical power detector 111 can be associated with, for example, the pre-optical amplifier PA to receive calibration light and signal light with the help of the existing pre-optical amplifier PA. The post-optical amplifier BA is connected to the transmitting mirror group 102 at the port BA-OUT with the help of the existing transmitting optical fiber F1, and the pre-optical amplifier PA is connected to the receiving mirror group 110 at the port PA-IN with the help of the existing receiving optical fiber F2. In addition, the post-optical amplifier BA is connected to the transmitting laser (not shown) at the port BA-IN with the help of an optical fiber, and the pre-optical amplifier PA is connected to the signal processor (not shown) at the port PA-OUT with the help of an existing optical fiber.

[0038] In some embodiments, the optical amplifier 100B may be an erbium-doped fiber amplifier (EDFA), which can amplify optical signals in optical fiber communication systems, thereby enhancing the transmission distance and signal quality of the signals. EDFA makes long-distance, large-capacity, and high-speed optical fiber communications possible. The post-optical amplifier BA of EDFA works on the transmission side or the transmission side of the link and is placed behind the transmitter. The post-optical amplifier BA is used to boost the power of multiple wavelength signals before transmitting them. The pre-optical amplifier PA of EDFA can work at the receiving end of a dense wavelength division multiplexing (DWDM) link. The pre-optical amplifier PA is placed before the receiver end of the DWDM link. The pre-optical amplifier PA is used to compensate for the loss in the demultiplexer near the optical receiver, and to enhance the signal level before optical detection in ultra-long-distance systems, thereby improving the receiving sensitivity.

[0039] In some embodiments, 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.

[0040] 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.

[0041] 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.

[0042] 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 after at least passing through the transmitting optical fiber F1, the transmitting mirror group 102, the leading galvanometer 103 and the tracking mirror group 108. In this way, by detecting on the position detector 109, the data when the optical axis of the transmitting mirror group is aligned with the optical axis of the tracking mirror group can be detected. When the leading galvanometer 103 is continuously adjusted to scan the calibration light, the position detector 109 can detect the position information of the light spot, which is used as a measurement for the self-calibration of the optical axis, so as to select the tracking feature value therefrom.

[0043] For example, Figure 1A As shown, the optical head spatial optical path 100A also includes a dichroic mirror 104, a light reflector 105, an attenuation device 106, a beam splitter 107 and a tracking lens group 108 (for example, a precision tracking lens group) along the optical path of the laser. The dichroic mirror 104 can split the transmitted signal light into two paths, one of which is emitted as signal light and the other is provided to the light reflector 105 and the attenuation device 106. Then the light returned from the light reflector 105 can be used as calibration light and guided to the beam splitter 107. The dichroic mirror 104 can also receive 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 split the calibration light into two paths, one of which is provided to the tracking lens group 108 (for example, a precision tracking lens group) to reach the position detector, and the other is provided to the receiving lens group 110.

[0044] For example, Figure 1A As shown, the calibration light from the calibration light supply device 101 is provided to the position detector 109 via the transmitting optical fiber F1, the transmitting mirror group 102, the leading galvanometer 103, the dichroic mirror 104, the light reflector 105, the attenuation device 106, the beam splitter 107, and the tracking mirror group 108 (for example, the precision tracking mirror group) to perform the spot measurement. In addition, as Figure 1A As shown, the signal light received by the dichroic mirror 104 can be provided to the position detector 109 via the light reflector 105, the attenuation device 106, the beam splitter 107 and the tracking lens group 108 (for example, the precision tracking lens group), so that the light spot of the received signal light is also measured, and the received signal light can also be provided to the receiving lens group 110 to enter the optical amplifier.

[0045] like Figure 1B As shown, the optical head spatial optical path 100A also includes a dichroic mirror 104, a light reflector 105, an optional attenuation device 106 (the dotted line indicates that the device is omissible), a beam splitter 107 and a tracking lens group 108 (for example, a precision tracking lens group) along the optical path of the laser. Figure 1A Compared with the embodiment, Figure 1BThe attenuation device 106 may be omitted in the embodiment, but the attenuation device 106 may also be included in Figure 1B In the embodiment of Figure 1B As 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 leading galvanometer 103, the dichroic mirror 104, the light reflector 105, the optional attenuation device 106, the beam splitter 107, and the tracking mirror group 108 (for example, the precision tracking mirror group) to perform the spot measurement, etc. In addition, as Figure 1B As shown, the signal light received by the dichroic mirror 104 can be provided to the position detector 109 via the light reflector 105, the optional attenuation device 106, the beam splitter 107 and the tracking lens group 108 (for example, the precision tracking lens group), so that the light spot of the received signal light is also measured, and the received signal light can also be provided to the receiving lens group 110 to enter the optical amplifier.

[0046] like Figure 1A and 1B As shown, the optical amplifier 100B may further include an optical power detector 111. The calibration light passing through the receiving mirror assembly 110 is input into the optical power detector 111 through the receiving optical fiber F2 to detect the power of the calibration light, so as to perform a measurement of the optical axis self-calibration. In addition, the received signal light passing through the receiving mirror assembly 110 is also input into the optical power detector 111 through the receiving optical fiber F2 to detect the power of the signal light, so as to perform a power measurement of the optical axis self-calibration.

[0047] like Figure 1A and 1B As shown, before the calibration light is input to the optical power detector 111, the calibration light from the receiving optical fiber F2 needs to first pass through the optical splitter 112 at the input end of the pre-optical amplifier PA, and the optical splitter 112 may include an input end coupler or a DWDM filter (not shown), so as to provide the calibration light to the optical power detector 111. As shown in the figure, the pre-optical amplifier PA includes other devices in addition to these couplers or filters, such as a PA gain device 115, etc.

[0048] In the laser transceiver according to the present invention, the transmission signal light from the existing post-optical amplifier of 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 contained in the optical amplifier. In either case, the calibration light can be provided by the existing components of the optical amplifier. Then the calibration light can be provided to the optical head spatial optical path through the existing transmitting optical fiber, and then provided to the position detector for spot measurement, etc. Using the existing receiving optical fiber, the calibration light and / or signal light from the optical head spatial optical path (the signal light is received by the dichroic mirror, for example, it is received by the receiving optical path formed by the dichroic mirror, the beam splitter, the receiving mirror group, etc.) is provided to the optical amplifier. Then the input end coupler or DWDM filter (contained 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.

[0049] Therefore, the calibration light uses the existing transmitting optical fiber and receiving optical fiber to propagate between the optical amplifier and the optical head space optical path, and the corresponding target tested by this scheme must be the target of the transmitting optical fiber and the receiving optical fiber. Since the existing laser communication in the optical amplifier (for example, EDFA) itself will use the input end coupler or the output end coupler or the DWDM filter, and the existing EDFA for laser communication generally has an optical power detector, etc., the present invention does not need to add additional devices, and can directly use the existing devices to realize the self-calibration of the optical axis.

[0050] Therefore, the laser transceiver device of the present invention is calibrated with the help of existing devices in the optical amplifier (for example, EDFA) commonly used in laser communication in conjunction with the spatial optical path of the optical head. This solution directly multiplexes the transmitting optical fiber and the receiving optical fiber. Therefore, the calibration process of this solution does not require laboratory calibration, and the calibration results are not affected by the environment. The calibration effect is stable after being on track. In addition, since the existing components in the optical amplifier (for example, EDFA) are directly multiplexed, there will be no additional cost increase, and there will be no interference with the original functions of the laser communication terminal. When the calibration fails, it will not have any impact on the function of the laser communication terminal itself, ensuring the reliability of the laser communication terminal. Therefore, the optical fiber optical path of the optical amplifier (for example, EDFA) is combined with the spatial optical path of the optical head to realize the calibration function and will not affect the original function of the laser communication terminal, and the cost does not change or changes very little, and the implementation is simple.

[0051] In such Figure 1AIn the described embodiment, the laser transceiver device with the function of self-calibration of the optical axis is 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 post-optical amplifier (BA), a beam splitter (generally a DWDM filter or coupler, or an optical switch) and an optical power detector at the input end of the pre-optical amplifier (PA). The optical head spatial optical path is composed of a transmitting mirror group, a leading galvanometer, a dichroic mirror (DM), an attenuation device, an optical reflector, a beam splitter, a precision follow-up 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, the BA of the optical amplifier is connected to the transmitting mirror group of the optical head spatial optical path through optical fibers, and the PA of the optical amplifier is connected to the receiving mirror group of the optical head spatial optical path through optical fibers. The calibration controller is connected to the optical amplifier and the leading galvanometer and position detector in the spatial optical path of the optical head through circuits.

[0052] In such Figure 1A In the illustrated embodiment, the optical fiber optical path portion of the optical amplifier 100B (e.g., EDFA) of the device is composed of a post-optical amplifier BA, an input end coupler or a DWDM filter of a pre-optical amplifier PA, and an optical power detector. The device uses the transmitted signal light as the calibration light, and the calibration light enters the transmitting mirror group 102 through the transmitting optical fiber F1 and is output to the leading galvanometer 103, and is output to the dichroic mirror 104 after being emitted by the leading galvanometer 103. The transmitted signal light is divided into two paths of light on the dichroic mirror 104, one of which is emitted as the signal light, and the other is output to the light reflector 105 after passing through the dichroic mirror 104 as the calibration light. The light reflector 105 generally selects a pyramid, and can also be a reflector, a grating, etc. An attenuation device 106 can be set between the dichroic mirror and the light reflector to adjust the optical power of the calibration light in the position detector 109 and the receiving optical fiber F2. In some examples, the attenuation device 106 can be an attenuator, an aperture, or a filter.

[0053] The calibration light passes through the optical reflector 105 and then returns to the dichroic mirror 104. 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 splits the calibration light into two new calibration lights, one of which is output to the tracking lens group 108 (for example, the precision tracking lens group) through the optical path and then output to the position detector 109. The position detector 109 feedbacks the position information as the tracking characteristic value based on the received light spot. In addition, the other calibration light is coupled into the receiving optical fiber F2 through the receiving lens group 110, and then output to the input end of the pre-optical amplifier PA. After passing through the optical splitter 112 provided at the input end of the pre-optical amplifier PA, the calibration light enters the optical power detector 111. The input part of the pre-optical amplifier PA (i.e., the optical splitter) can include an input end coupler (not shown) and can also include a DWDM filter (not shown).

[0054] In some embodiments, the input end coupler of the preamplifier PA is selected to guide the calibration light, so the input end coupler of the preamplifier 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 preamplifier PA and then passes through the DWDM filter. At this time, the original input end optical power detector of the preamplifier PA can be directly used as the optical power detector 111 for calibration.

[0055] In some embodiments, a DWDM filter can be selected as the input end of the pre-optical amplifier PA. Then, the order of the input end coupler and the DWDM filter of the pre-optical amplifier PA does not affect the calibration function, but another output port of the DWDM filter needs to be connected to the optical power detector 111 via 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.

[0056] In such 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.

[0057] 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.

[0058] 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.

[0059] The calibration light enters the emitting mirror group 102 through the emitting optical fiber F1 and is output to the leading galvanometer 103. After being emitted by the leading galvanometer 103, it is output to the dichroic mirror 104. The dichroic mirror 104 outputs the calibration light to the light reflector 105. The light reflector 105 is generally a pyramid, but can also be a reflector, a grating, etc. Figure 1B The laser transceiver can optionally add an attenuation device 106 between the dichroic mirror 104 and the light reflector 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 plate, an aperture, or a filter. Figure 1B The laser transceiver device can also choose 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 light reflector.

[0060] The calibration light passes through the optical reflector 105 and then 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 splits the calibration light into two new calibration lights, one of which is output to the tracking lens group 108 (for example, the precision tracking lens group) through the optical path and then output to the position detector 109. The position detector 109 feedbacks the position information based on the received light spot as the tracking feature value. The other calibration light is coupled into the receiving optical fiber F2 through the receiving lens group 110 and output to the input end of the pre-optical amplifier PA. After passing through the optical splitter 112, the calibration light enters the optical power detector 111. Usually, the input part of the PA (i.e., the optical splitter) includes both the input end coupler and the DWDM filter.

[0061] In some embodiments, the input end coupler of the preamplifier PA is selected to guide the calibration light, and the input end coupler of the preamplifier 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 preamplifier PA and then passes through the DWDM filter. At this time, the original input end optical power detector of the preamplifier PA can be directly used as the optical power detector for calibration.

[0062] In some embodiments, a DWDM filter is selected as the input end of the pre-optical amplifier PA. The order of the input end coupler and the DWDM filter of the pre-optical amplifier PA does not affect the calibration function, but another output port of the DWDM needs to be connected to the optical power detector 111 via 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.

[0063] Figure 2 A flow chart of a method 200 for performing optical axis self-calibration on a laser transceiver device according to an embodiment of the present invention is shown.

[0064] 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.

[0065] 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.

[0066] 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).

[0067] 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.

[0068] Figure 3 Shown is the Figure 1A The illustrated embodiment is a flow chart of a method 300 for performing optical axis self-calibration of a laser transceiver device.

[0069] After the calibration process is started, in step 310, the calibration controller sets the output power of the post optical amplifier BA of the EDFA and the position of the leading galvanometer to a predetermined value. The predetermined value may be an initial value calibrated in a laboratory. Under the initial value, the optical axis of the transmitting mirror assembly is aligned with the optical axis of the receiving mirror assembly, and is aligned with the optical axis of the tracking mirror assembly. However, as the optical axis is affected by heat and force when on track, these optical axes are no longer aligned.

[0070] During the calibration process, in step 320 , the calibration controller 100C controls the leading galvanometer 103 to scan near a predetermined value and records the camera spot centroid reading of the position detector 109 and the reading of the optical power detector 111 at each scanning point.

[0071] After completing the scanning of the predetermined range, in step 330, the calibration controller 100C compares all the readings of the optical power detector 111 and selects a group of data with the highest corresponding readings among the readings of the optical power detector. In step 340, the corresponding result of the highest power value of the detector is recorded, and recorded as the corresponding setting of the lead galvanometer 103 and the characteristic value of the position detector 109. In step 350, the calibration controller 100C sets the corresponding setting of the lead galvanometer to the default setting of the lead galvanometer, and sets the characteristic value of the position detector to the tracking point or tracking point or tracking position characteristic value. At this time, the self-calibration of the optical axis is completed.

[0072] Figure 4 Shown is the Figure 1B The illustrated embodiment is a flow chart of a method 400 for performing optical axis self-calibration of a laser transceiver device.

[0073] After the calibration process starts, in step 420, the calibration controller 100C controls the post optical amplifier BA to turn off, and sets the calibration laser 116 and the leading galvanometer 103 to a predetermined value. In step 420, the calibration controller 100C controls the leading galvanometer 103 to scan near the predetermined value and records the camera spot centroid reading and the optical power detector reading at each scanning point.

[0074] In step 430, after completing the scan of the predetermined range, the calibration controller 100C compares all the detector readings and selects a set of data with the highest corresponding power of the detector readings. In step 440, the corresponding result of the highest detector power value is recorded and recorded as the corresponding setting of the lead galvanometer and the characteristic value of the position detector. In step 450, the calibration controller 100C sets the corresponding setting of the lead galvanometer to the default setting of the lead galvanometer and sets the characteristic value of the position detector to the tracking point or tracking point or tracking position characteristic value. At this time, the optical axis self-calibration is completed.

[0075] Figure 5 1 shows a schematic block diagram of an example device 500 that can be used to implement an embodiment of the present invention. The example device 500 can be as follows: Figure 1A and 1B An embodiment of a calibration controller 100C is shown. As shown, 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 to 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 via a bus 504. An input / output (I / O) interface 505 is also connected to the bus 504.

[0076] A number of components in the device 500 are connected to the I / O interface 505, which may include, for example: 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 disk, an optical disk, 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.

[0077] The computing unit 501 may be a variety of general and / or special 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, digital signal processors (DSPs), and any appropriate processors, controllers, microcontrollers, etc. The computing unit 501 performs 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, which is tangibly contained in a machine-readable medium, such as a storage unit 508. In some embodiments, part or all of the computer program may be loaded and / or installed on 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 the methods 200 to 400 described above may be performed. Alternatively, in other embodiments, the computing unit 501 may be configured to execute methods 200 to 400 in any other appropriate manner (eg, by means of firmware).

[0078] The functions described above herein may 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 (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chip systems (SOCs), load programmable logic devices (CPLDs), and the like.

[0079] The program code for implementing the method 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, so that the program code, when executed by the processor or controller, enables the functions / operations specified in the flow chart and / or block diagram to be implemented. The program code can be executed entirely on the machine, partially on the machine, partially on the machine as a stand-alone software package and partially on a remote machine, or entirely on a remote machine or server.

[0080] In the context of the present invention, a machine-readable medium may be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, device or equipment. A machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or equipment, or any suitable combination of the foregoing. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, 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 disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In addition, although each operation is depicted in a specific order, this should be understood as requiring such operations to be performed in the specific order shown or in a sequential order, or requiring that all illustrated operations should be performed to obtain the desired result. In certain environments, multitasking and parallel processing may be advantageous. Similarly, although several specific implementation details are included in the above discussion, these should not be construed as limiting the scope of the present invention. Certain features described in the context of a separate embodiment may also be implemented in a single implementation in combination. On the contrary, the various features described in the context of a single implementation may also be implemented in multiple implementations individually or in any suitable sub-combination.

[0081] Although the subject matter has been described in language specific to structural features and / or methodological logical actions, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. On the contrary, the specific features and actions 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 further provided to the position detector via at least the lead galvanometer and the tracking mirror group to perform a first measurement of optical axis self-calibration, and the calibration light is provided to the optical power detector through the receiving mirror group to perform a second measurement of optical axis self-calibration.

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 claim 1, characterized in that: The second optical amplifier assembly further comprises a light splitting device at its input end, The calibration light from the receiving optical fiber is provided to the optical power detector via the light splitting device.

8. The laser transceiver device according to claim 7, characterized in that: The light splitting device comprises a second coupler located at the input end of the second optical amplifier assembly, The optical power detector comprises a first input optical power detector located at the input end of the second optical amplifier assembly, and The calibration light is provided to the first input optical power detector via the second coupler.

9. The laser transceiver device according to claim 7, characterized in that: 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.

10. The laser transceiver device according to any one of claims 1 to 9, characterized in that: The optical amplifier comprises an erbium-doped fiber amplifier.

11. The laser transceiver device according to any one of claims 1 to 9, further comprising a calibration controller communicably 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.

12. A method for self-calibrating an optical axis of a 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.

13. The method according to claim 12, 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.

14. The method according to claim 12, 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.

15. 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 12 to 14.

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