Multi-channel optical module SOA calibration and gain control method and device

Abstract

The invention provides a multichannel optical module SOA calibration and gain control method and device, and the method comprises the steps: setting a target sampling value, and calibrating the current of different amplification gears in an amplifier according to the target sampling value; adjusting to a corresponding amplification gear according to the corresponding calibration current, and performing calibration to obtain a light-free sampling threshold value corresponding to each channel under different amplification gears; performing effective light judgment on each channel according to the non-light sampling threshold, adjusting a target sampling value according to the number of channels with effective light, and obtaining an actual total sampling value; according to the size relation between the adjusted target sampling value and the actual total sampling value, an amplifier is adjusted to a corresponding amplification gear, so that the actual total sampling value is adjusted to be within the allowable error range of the target sampling value; through the calibration of the target sampling value and the amplification gear and the judgment of the effective light of each channel, the automatic control and adjustment of the amplification gain of the multi-channel light receiving and transmitting are realized.

Description

Technical Field

[0001] The present invention relates to the field of optical communication technology, and in particular to a method and device for SOA calibration and gain control of a multi-channel optical module. Background Art

[0002] In the prior art, semiconductor optical amplifiers (SOAs) can be directly applied to single-channel optical transceiver scenarios. However, with the increasing requirements for optical communication applications, their application in multi-channel optical transceiver scenarios is becoming more and more extensive. However, when applying optical amplifiers to multi-channel scenarios, the output light intensity of each channel varies under different amplification levels and different input light conditions, and the activation conditions of each channel in actual application also vary. Therefore, it is relatively complex to control the amplification gain of multiple channels simultaneously through the amplifier, and it is difficult to achieve automatic adjustment while ensuring stable amplification gain.

[0003] In view of this, overcoming the defects of the prior art is an urgent problem to be solved in this technical field. Summary of the Invention

[0004] The technical problem to be solved by the present invention is how to automatically control and adjust the amplification gain in a multi-channel optical transceiver scenario through an amplifier.

[0005] The present invention adopts the following technical solutions:

[0006] In a first aspect, a method for SOA calibration and gain control of a multi-channel optical module is provided, comprising:

[0007] Setting a target sampling value, and calibrating the amplified current corresponding to different amplification gears in the amplifier according to the target sampling value to obtain the calibrated current corresponding to the different amplification gears of the amplifier;

[0008] The amplifier is adjusted to the corresponding amplification gear according to the corresponding calibration current, and the corresponding no-light sampling threshold of each channel at different amplification gears is obtained by calibration;

[0009] Obtaining a channel sampling value of each channel after being amplified by the amplifier, performing effective light judgment on each channel based on the channel sampling value of each channel and a corresponding no-light sampling threshold, obtaining the number of channels with effective light, adjusting the target sampling value based on the number of channels with effective light, and obtaining an actual total sampling value based on the channel sampling values of all channels;

[0010] According to the size relationship between the adjusted target sampling value and the actual total sampling value, the amplifier is adjusted to the corresponding amplification gear to adjust the actual total sampling value until the difference between the adjusted actual total sampling value and the adjusted target sampling value is less than the first preset accuracy difference.

[0011] Preferably, the setting of the target sampling value specifically includes:

[0012] Set the amplifier's magnification to maximum;

[0013] Turn on all channels and input optical signals with preset optical power;

[0014] The sampling value of each channel is obtained, and the sampling value of each channel is added to obtain the target sampling value.

[0015] Preferably, the step of calibrating the amplified currents corresponding to different amplification gears of the amplifier according to the target sampling value to obtain the calibrated currents corresponding to the different amplification gears of the amplifier specifically includes:

[0016] Turn on all channels and input optical signals with preset optical power to all channels;

[0017] The optical signal of the preset optical power is increased and adjusted multiple times according to the preset difference, and the optical signal after each adjustment is used for calibration corresponding to different amplification gears;

[0018] In the calibration of the corresponding amplification gear, the corresponding adjusted optical signal is input, the sampling value of each channel is obtained, and the total sampling value of all channels is obtained;

[0019] Comparing the total sampling value with the target sampling value, and adjusting the amplification current of the amplifier until the difference between the total sampling value and the target sampling value is less than a first preset accuracy difference;

[0020] The current amplified current is used as the calibration current corresponding to the current amplification gear.

[0021] Preferably, the step of adjusting the amplifier to a corresponding amplification gear according to the corresponding calibration current, and calibrating to obtain the corresponding no-light sampling threshold of each channel at different amplification gears, specifically includes:

[0022] Adjusting the amplified current of the amplifier to the corresponding calibration current to adjust the amplifier to the corresponding amplification gear;

[0023] Turn on all channels, input optical signals with invalid optical power at the corresponding amplification level, and obtain sampling values for all channels;

[0024] The obtained sampling value of each channel is used as the light-free sampling threshold of the corresponding channel under the corresponding amplification gear.

[0025] Preferably, performing effective light judgment on each channel according to the channel sampling value of each channel and the corresponding no-light sampling threshold to obtain the number of channels with effective light, adjusting the target sampling value according to the number of channels with effective light, and obtaining the actual total sampling value according to the channel sampling values of all channels, specifically includes:

[0026] Under the current amplification level, determine the relationship between the channel sampling value of each channel and the corresponding no-light sampling threshold of each channel;

[0027] When the channel sampling value is greater than the no-light sampling threshold, there is valid light in the corresponding channel; when the channel sampling value is less than or equal to the no-light sampling threshold, there is invalid light in the corresponding channel;

[0028] Obtaining a ratio between the number of channels with effective light and the total number of channels, and multiplying the target sampling value by the ratio to obtain an adjusted target sampling value;

[0029] The channel sampling values of all channels are added together to obtain the actual total sampling value.

[0030] Preferably, the step of adjusting the amplifier to a corresponding amplification gear according to the magnitude relationship between the adjusted target sampling value and the actual total sampling value to adjust the actual total sampling value until the difference between the adjusted actual total sampling value and the target sampling value is less than a first preset accuracy difference comprises:

[0031] When the actual total sampling value is greater than the adjusted target sampling value, and the difference between the actual total sampling value and the adjusted target sampling value is greater than or equal to the first preset precision difference, the amplification unit of the amplifier is reduced by one gear, the adjusted target sampling value and the adjusted actual total sampling value are obtained again, and the size relationship between the adjusted target sampling value and the adjusted actual total sampling value is compared again until the difference between the adjusted actual total sampling value and the adjusted target sampling value is less than the first preset precision difference;

[0032] When the actual total sampling value is less than the adjusted target sampling value, and the difference between the actual total sampling value and the adjusted target sampling value is greater than or equal to the first preset precision difference, the amplification unit of the amplifier is increased by one level, the adjusted target sampling value and the adjusted actual total sampling value are obtained again, and the size relationship between the adjusted target sampling value and the actual total sampling value is compared again until the difference between the adjusted actual total sampling value and the target sampling value is less than the first preset precision difference.

[0033] Preferably, the multi-channel optical module SOA calibration and gain control method further includes:

[0034] Adjust the amplifier to the corresponding amplification gear according to the corresponding calibration current;

[0035] Input an optical signal of corresponding power to each channel at each amplification level, and obtain a sampling value corresponding to each channel;

[0036] At each amplification level, multiple sets of corresponding optical signal powers and sampling values are recorded for each channel. Quadratic fitting is performed based on the recorded multiple sets of corresponding optical signal powers and sampling values to obtain a relationship curve between the optical signal power and sampling values of the corresponding channel at the corresponding amplification level.

[0037] Preferably, the method further comprises adjusting the amplifier to a corresponding amplification gear according to the magnitude relationship between the adjusted target sampling value and the actual total sampling value, so as to adjust the actual total sampling value until the difference between the adjusted actual total sampling value and the target sampling value is less than a first preset accuracy difference value.

[0038] Obtain the adjusted channel sampling value of each channel in the adjusted actual total sampling value;

[0039] According to the corresponding relationship curve, the adjusted sampling values of the respective channels are converted into optical power values of the optical signals output by the respective channels.

[0040] In a second aspect, a multi-channel optical module SOA calibration and gain control device is provided, comprising at least one processor and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the processor to execute the multi-channel optical module SOA calibration and gain control method.

[0041] In a third aspect, the present invention further provides a non-volatile computer storage medium, wherein the computer storage medium stores computer-executable instructions, and the computer-executable instructions are executed by one or more processors to complete the method described in the first aspect.

[0042] In a fourth aspect, a chip is provided, comprising: a processor and an interface, for calling and running a computer program stored in a memory to execute the method of the first aspect.

[0043] In a fifth aspect, a computer program product comprising instructions is provided, which, when executed on a computer or a processor, causes the computer or the processor to execute the method of the first aspect.

[0044] In a sixth aspect, a multi-channel optical module SOA calibration and gain control system is provided, comprising the multi-channel optical module SOA calibration and gain control device of the second aspect, and using the multi-channel optical module SOA calibration and gain control method of the first aspect.

[0045] The present invention provides a multi-channel optical module SOA calibration and gain control method and device, which set a target sampling value, calibrate the current of different amplification gears in the amplifier according to the target sampling value; adjust the corresponding amplification gear according to the corresponding calibration current, and calibrate to obtain the corresponding no-light sampling threshold of each channel at different amplification gears; perform effective light judgment on each channel according to the no-light sampling threshold, adjust the target sampling value according to the number of channels with effective light, and obtain an actual total sampling value; according to the size relationship between the adjusted target sampling value and the actual total sampling value, adjust the amplifier to the corresponding amplification gear to adjust the actual total sampling value to within the allowable error range of the target sampling value; through the above-mentioned calibration of the target sampling value and the amplification gear and the judgment of the effective light of each channel, the accurate acquisition of relevant parameters of different channels at different amplification gears is guaranteed, the accurate regulation of the amplification gain of the multi-channel optical transceiver is guaranteed, and the automatic control and adjustment of the amplification gain of the multi-channel optical transceiver is realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0047] Figure 1 This is a method flow chart of a multi-channel optical module SOA calibration and gain control method provided by an embodiment of the present invention;

[0048] Figure 2 This is a flow chart of a method for obtaining target sampling values in a multi-channel optical module SOA calibration and gain control method provided by an embodiment of the present invention;

[0049] Figure 3 This is a flow chart of a method for obtaining calibration currents for each amplification gear in a multi-channel optical module SOA calibration and gain control method provided by an embodiment of the present invention;

[0050] Figure 4 This is a flow chart of a method for obtaining the light-free sampling threshold of each channel at each amplification level in a multi-channel optical module SOA calibration and gain control method provided by an embodiment of the present invention;

[0051] Figure 5 This is a flow chart of a method for obtaining a relationship curve between the optical power of each channel at each amplification level and the sampling value in a multi-channel optical module SOA calibration and gain control method provided by an embodiment of the present invention;

[0052] Figure 6 This is a flow chart of a method for adjusting a target sampling value in actual application of a multi-channel optical module SOA calibration and gain control method provided by an embodiment of the present invention;

[0053] Figure 7 This is a flowchart of a method for adjusting the amplification gear in a practical application of a multi-channel optical module SOA calibration and gain control method provided by an embodiment of the present invention;

[0054] Figure 8 This is a flow chart of a method for converting sampled values into optical power in a multi-channel optical module SOA calibration and gain control method provided by an embodiment of the present invention;

[0055] Figure 9 The figure is a schematic diagram of a multi-channel optical module SOA calibration and gain control device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0056] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0057] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present disclosure.

[0058] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise specified, "multiple" means two or more. In addition, for example, the description may also use the method of adding "A" and "B" at the end to describe the same type of nouns as two independent individuals. In this case, the corresponding features defined as "A" and "B" are only used to distinguish the description purposes of the same type of individuals, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

[0059] As used herein, "about," "substantially," or "approximately" includes the stated value and an average value that is within an acceptable range of deviation from the particular value as determined by one of ordinary skill in the art taking into account the measurement in question and the errors associated with the measurement of the particular quantity, i.e., the limitations of the measurement system.

[0060] Unless the context requires otherwise, throughout the specification and claims, the term "including" is to be interpreted as meaning open inclusion, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example" or "some examples" and the like are intended to indicate that the specific features, structures, materials or characteristics associated with the embodiment or example are included in at least one embodiment or example of the present disclosure. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the specific features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner, that is, although they may be carried in the embodiments or examples of the above terms due to reasons such as the order and position of appearance, it is not limited to that they can be carried in combination by one embodiment or example.

[0061] In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0062] Embodiment 1:

[0063] The embodiment of the present invention provides a multi-channel optical module SOA calibration and gain control method, such as Figure 1 Shown, including:

[0064] In step 101, a target sampling value is set, and the amplified current corresponding to different amplification gears in the amplifier is calibrated according to the target sampling value to obtain the calibrated current corresponding to the different amplification gears of the amplifier.

[0065] The method provided in this embodiment is applied to regulating the amplification gain provided by an amplifier. The amplifier can amplify the optical power of an optical signal to varying degrees. In practical applications, it is necessary to ensure that the optical power of the optical signal is stable within a certain range. On the one hand, it is necessary to avoid affecting the transmission performance of the optical signal due to too low optical power, and on the other hand, it is necessary to avoid damage to the hardware due to too high optical power. Therefore, it is necessary to adjust the amplification gain of the amplifier so that the optical power of the received optical signal is within an appropriate range.

[0066] It should be noted that in the scenario in which the method provided in this embodiment is applied, the optical signal is transmitted through multiple channels and is received by the receiving end after passing through the amplifier.

[0067] The target sampling value is: when all optical path channels in the hardware are turned on to transmit effective light, after the optical signal is amplified by the amplifier, the sum of the sampling values corresponding to the relatively appropriate optical signal received by the receiving end on each channel. This optical signal can ensure relatively excellent transmission performance and will not damage the hardware due to excessive power. It should be noted that the sampling value or target sampling value is not the optical power of the optical signal, but data related to the optical power. The sampling value or target sampling value can be converted into the corresponding optical power through corresponding calculations. The target sampling value in this embodiment is set by those skilled in the art based on the optical path performance requirements and hardware performance in combination with the amplifier, and is used as a reference for subsequent calibration of various parameters.

[0068] In this embodiment, since the input optical signal strength and the number of enabled channels may vary during actual optical signal transmission, it is necessary to adjust the amplifier's gain so that the sampled value of the amplified optical signal meets the target sampled value standard. Therefore, the amplifier's gain needs to be pre-calibrated to different amplification levels based on the target sampled value. Each amplification level corresponds to a different amplification gain, facilitating subsequent direct control of the amplifier. Since different amplification gains are achieved by applying different amplification currents to the amplifier, calibration of different amplification levels essentially determines the calibration of the amplification current required for different amplification gains, i.e., the calibration current. When the amplifier is required to provide a corresponding amplification gain, the corresponding calibration current is simply provided to the amplifier.

[0069] In step 102, the amplifier is adjusted to a corresponding amplification gear according to a corresponding calibration current, and calibration is performed to obtain a corresponding no-light sampling threshold value of each channel at different amplification gears.

[0070] Furthermore, since, during actual optical signal transmission and reception, not all channels used to transmit optical signals are necessarily enabled, and the target sampling value is set when all channels are enabled and transmitting effective light, if not all channels are enabled in actual application, the target sampling value used as a reference standard needs to be adjusted according to the number of channels actually enabled. Therefore, during actual optical signal transmission and reception, it is necessary to pre-determine the number of optical channels actually enabled (i.e., optical channels with effective light). In this embodiment, whether a single channel has effective light is determined based on whether the sampling value of the channel is greater than a certain threshold, i.e., the no-light sampling threshold. However, since different channels and different amplification levels will cause the sampling value of the optical signal to vary, different channels at different amplification levels need to be calibrated in advance to obtain different no-light sampling thresholds. This is used to determine whether each channel has effective light at different amplification levels during subsequent actual optical signal reception.

[0071] In step 103, the channel sampling value of each channel after amplification by the amplifier is obtained, and effective light judgment is performed on each channel based on the channel sampling value of each channel and the corresponding no-light sampling threshold to obtain the number of channels with effective light. The target sampling value is adjusted according to the number of channels with effective light, and the actual total sampling value is obtained based on the channel sampling values of all channels.

[0072] The channel sampling value is the sampling value for each channel during actual optical signal reception after the pre-calibration step is completed. Considering that the intensity of the transmitted optical signal and the number of enabled channels may vary during actual optical signal transmission, it is necessary to determine in real time whether the total sampling value of all enabled channels meets the transmission performance and hardware performance requirements, and to adjust the amplifier gain in real time to ensure that the total sampling value of all enabled channels meets the corresponding requirements. Each channel first finds the corresponding no-light sampling threshold based on the current amplifier amplification level. This is used to determine whether the channel has valid light at the current amplification level. The number of channels with valid light among all channels is then determined, and the originally set target sampling value is then adjusted. The adjusted target sampling value serves as the standard for subsequent amplification gain adjustments. For example, if there are six channels and four channels have valid light in actual application, the original target sampling value is adjusted to two-thirds of the original target sampling value. The actual total sampling value is obtained by summing the channel sampling values of all channels.

[0073] In step 104, based on the size relationship between the adjusted target sampling value and the actual total sampling value, the amplifier is adjusted to the corresponding amplification gear to adjust the actual total sampling value until the difference between the adjusted actual total sampling value and the adjusted target sampling value is less than the first preset accuracy difference.

[0074] In this embodiment, since it is difficult to adjust the actual total sampling value to be completely consistent with the target sampling value by adjusting the amplifier switching gear, the actual total sampling value can be adjusted to within the range of the positive and negative first preset accuracy difference of the target sampling value. The first preset accuracy difference is set by technical personnel in this field according to actual conditions. In this embodiment, the first preset accuracy difference can be 600AD.

[0075] Through the above method, different amplification gears of the amplifier are calibrated according to the set target sampling value, and the light-free sampling threshold of each channel at different amplification gears is calibrated, which facilitates the judgment of the activation status of multiple channels. The sum of the sampling values of all channels is compared with the target sampling value, so as to adjust the amplification gain of the amplifier and realize the amplification gain adjustment of multiple channels.

[0076] Furthermore, in this embodiment, the target sampling value is used as a criterion for determining whether a subsequently received optical signal meets transmission performance and hardware performance. The setting of the target sampling value involves the following design:

[0077] The setting target sampling value specifically includes: Figure 2 As shown, the method flow is as follows:

[0078] In step 201, the amplification factor of the amplifier is set to maximum.

[0079] In step 202, all channels are turned on and optical signals with a preset optical power are input.

[0080] In step 203, the sampling value of each channel is obtained, and the sampling value of each channel is added together to obtain the target sampling value.

[0081] In this embodiment, when the amplifier has the largest amplification factor, the optical power of the input optical signal is the smallest compared to other amplification factors, and the overall module performance is optimal at this time. Therefore, the sum of the sampling values of all channels in this case is used as the target sampling value.

[0082] In this embodiment, the amplification factor of the amplifier is adjusted to the maximum. The preset optical power can be set by those skilled in the art according to actual conditions. The preset optical power can be -16dBm.

[0083] Furthermore, in this embodiment, each gear of the amplifier is pre-calibrated according to the target sampling value to facilitate the subsequent adjustment of the gear switching of the amplifier, which specifically involves the following designs:

[0084] The amplified current corresponding to different amplification gears in the amplifier is calibrated according to the target sampling value to obtain the calibrated current corresponding to different amplification gears of the amplifier, such as Figure 3 As shown, the specific method process includes:

[0085] In step 301, all channels are turned on, and optical signals of preset optical power are input to all channels. The optical signals of preset optical power are increased and adjusted multiple times according to preset differences, and the optical signals after each adjustment are used for calibration corresponding to different amplification gears.

[0086] In this embodiment, the preset difference is set by a person skilled in the art according to actual conditions. It should be noted that each time an amplification level is adjusted and calibrated, the preset difference needs to be increased accordingly based on the input optical signal corresponding to the previous amplification level, and the preset difference used for adjustment each time may be different.

[0087] In step 302, in the calibration of the corresponding amplification level, the corresponding adjusted optical signal is input, the sampling value of each channel is obtained, and the total sampling value of all channels is obtained.

[0088] In step 303, the total sampling value is compared with the target sampling value, and the amplification current of the amplifier is adjusted until the difference between the total sampling value and the target sampling value is smaller than a first preset accuracy difference.

[0089] In step 304, the current amplified current is used as the calibration current corresponding to the current amplification level.

[0090] In this embodiment, while keeping the amplification gain unchanged, the optical power of the optical signal is increased by a preset difference, and the total sampling value of all channels will increase synchronously. In order to ensure that the total sampling value meets the standard of the target sampling value, the amplification factor of the amplifier needs to be reduced. Therefore, the amplification current of the amplifier is adjusted until the total sampling value meets the target sampling value. The amplification current at this time is the calibration current corresponding to the selected amplification gear.

[0091] It should be noted that after obtaining the calibration currents corresponding to all amplification gears, it is determined whether the sizes of the calibration currents corresponding to each amplification gear decrease linearly from large to small. If so, it means that the calibration currents of all amplification gears are qualified. If not, it means that the corresponding calibration currents are unqualified.

[0092] To illustrate the above method flow more clearly, the following example is used:

[0093] The amplifier is calibrated to 15 amplification gears, wherein the maximum amplification ratio is taken as the maximum gear 15, at which time the optical power of the input optical signal is -16dBm, and the total sampling value of all channels input at this time is taken as the target sampling value; the optical power of the input optical signal is adjusted to -14.5dBm, and the amplified current is adjusted so that the total sampling value meets the target sampling value, and the amplified current at this time is used as the calibration current for the 14th gear; the optical power of the input optical signal is adjusted to -13dBm, and the amplified current is adjusted so that the total sampling value meets the target sampling value, and the amplified current at this time is used as the calibration current for the 13th gear; the optical power of the input optical signal is adjusted to -11.5dBm, and the amplified current is adjusted The current is adjusted to make the total sampling value meet the target sampling value, and the amplified current at this time is used as the calibration current for the 12th gear; the input optical signal power is adjusted to -10dBm, and the amplified current is adjusted to make the total sampling value meet the target sampling value. The amplified current at this time is used as the calibration current for the 11th gear; the input optical signal power is adjusted to -8.5dBm, and the amplified current is adjusted to make the total sampling value meet the target sampling value. The amplified current at this time is used as the calibration current for the 10th gear; the input optical signal power is adjusted to -7dBm, and the amplified current is adjusted to make the total sampling value meet the target sampling value. The amplified current at this time is used as the calibration current for the 9th gear; the input optical signal power is adjusted to -5.5dBm, adjust the amplified current so that the total sampling value meets the target sampling value, and the amplified current at this time is used as the calibration current for the 8th gear; adjust the input optical signal power to -4dBm, adjust the amplified current so that the total sampling value meets the target sampling value, and the amplified current at this time is used as the calibration current for the 7th gear; adjust the input optical signal power to -2.5dBm, adjust the amplified current so that the total sampling value meets the target sampling value, and the amplified current at this time is used as the calibration current for the 6th gear; adjust the input optical signal power to -1dBm, adjust the amplified current so that the total sampling value meets the target sampling value, and the amplified current at this time is used as the calibration current for the 5th gear; The input optical signal power is adjusted to 0 dBm, and the amplified current is adjusted so that the total sampling value meets the target sampling value. The amplified current at this time is used as the calibration current for the 4th gear. The input optical signal power is adjusted to 1 dBm, and the amplified current is adjusted so that the total sampling value meets the target sampling value. The amplified current at this time is used as the calibration current for the 3rd gear. The input optical signal power is adjusted to 2 dBm, and the amplified current is adjusted so that the total sampling value meets the target sampling value. The amplified current at this time is used as the calibration current for the 2nd gear. The input optical signal power is adjusted to 3 dBm, and the amplified current is adjusted so that the total sampling value meets the target sampling value. The amplified current at this time is used as the calibration current for the 1st gear.

[0094] Furthermore, in this embodiment, for calibration of the no-light sampling threshold of each channel at different amplification levels, this embodiment designs the following:

[0095] The amplifier is adjusted to the corresponding amplification gear according to the corresponding calibration current, and the corresponding no-light sampling threshold of each channel at different amplification gears is obtained by calibration, such as Figure 4 As shown, the method flow includes:

[0096] In step 401, the amplified current of the amplifier is adjusted to a corresponding calibration current, so as to adjust the amplifier to a corresponding amplification gear.

[0097] In step 402, all channels are turned on, and optical signals with invalid optical power are input at corresponding amplification levels to obtain sampling values of all channels.

[0098] In step 403, the acquired sampling value of each channel is used as the light-free sampling threshold of the corresponding channel at the corresponding amplification level.

[0099] In this embodiment, the null optical power is set by those skilled in the art based on practical circumstances. When an optical signal with null optical power is input, each channel remains in a null optical state regardless of the amplifier's amplification level. However, due to differences in amplification level and channel, the sampled values output by each channel at different amplification levels still differ. These output sampled values serve as the null optical sampling threshold for that channel at the current amplification level. In this embodiment, the preset null optical power may be -40dBm.

[0100] It should be noted that since the preset no-light power of the input is consistent, the sampling values output by the corresponding channels are still different after amplification at different amplification levels. For each channel, the no-light sampling threshold corresponding to the amplification level from large to small should decrease linearly. If this condition is met, it means that the calibration of the no-light sampling threshold of the channel at each amplification level is qualified.

[0101] Furthermore, it is worth mentioning that after completing the calibration of the amplifier's amplification gear, in addition to calibrating the light-free sampling threshold of each channel at different gears, the relationship curve between the optical signal power and the sampling value of each channel at different gears can also be calibrated to achieve the conversion between the sampling value and the optical power of each channel, which facilitates the subsequent processing and application of the optical power data of each channel. Therefore, this embodiment also involves the following design:

[0102] The amplifier is adjusted to the corresponding amplification gear according to the corresponding calibration current, and the calibration obtains the corresponding no-light sampling threshold of each channel at different amplification gears, and also includes: Figure 5As shown, the method for obtaining the relationship curve between the optical signal power and the sampling value of each channel at different gears is as follows:

[0103] In step 501, the amplifier is adjusted to a corresponding amplification gear according to the corresponding calibration current.

[0104] In step 502, an optical signal of corresponding power is input to each channel at each amplification level to obtain a sampling value corresponding to each channel.

[0105] In step 503, multiple sets of corresponding optical signal powers and sampling values are recorded for each channel at each amplification level. A quadratic fit is performed based on the recorded multiple sets of corresponding optical signal powers and sampling values to obtain a relationship curve between the optical signal power and sampling values of the corresponding channel at the corresponding amplification level.

[0106] It's important to note that the optical power of the input optical signal at each amplification level must ensure that the sampled values output by each channel meet the target sampled value requirements. Based on this, multiple sets of corresponding optical signal powers and sampled values are obtained, and quadratic fitting is performed to obtain a relationship curve between optical signal power and sampled values. Each different channel has a corresponding relationship curve at different amplification levels. All relationship curves are recorded in a configuration table. When converting sampled values to optical power is required later, they can be retrieved from the configuration table.

[0107] Furthermore, after completing the calibration of the amplification gear, the calibration of the lightless sampling threshold of each channel at each amplification gear, and the calibration of the relationship curve between the optical signal power and the sampling value, in the actual application of the optical signal receiving scenario of the multi-channel amplifier, it is necessary to first determine the input amount of the channel with effective light in the multi-channel, such as Figure 6 As shown, the method flow includes:

[0108] The effective light judgment is performed on each channel according to the channel sampling value of each channel and the corresponding no-light sampling threshold, the number of channels with effective light is obtained, the target sampling value is adjusted according to the number of channels with effective light, and the actual total sampling value is obtained according to the channel sampling values of all channels, specifically including:

[0109] In step 601, at the current amplification level, the magnitude relationship between the channel sampling value of each channel and the light-free sampling threshold corresponding to each channel is determined.

[0110] In step 602, when the channel sampling value is greater than the no-light sampling threshold, there is valid light in the corresponding channel; when the channel sampling value is less than or equal to the no-light sampling threshold, there is invalid light in the corresponding channel.

[0111] In step 603, the ratio between the number of channels with effective light and the total number of channels is obtained, and the target sampling value is multiplied by the ratio to obtain an adjusted target sampling value.

[0112] In step 604, the channel sampling values of all channels are added together to obtain the actual total sampling value.

[0113] Each channel first finds the corresponding no-light sampling threshold based on the current amplifier level. This threshold is used to determine whether the channel has effective light at the current level. The number of channels with effective light among all channels is then determined, and the originally set target sampling value is adjusted. The adjusted target sampling value serves as the standard for adjusting the amplifier gain in subsequent steps. For example, if there are six channels and four channels have effective light in actual application, the original target sampling value is adjusted to 2 / 3 of the original value. The actual total sampling value is obtained by adding the channel sampling values of all channels.

[0114] Furthermore, after determining the number of channels with effective light and adjusting the target sampling value accordingly, the actual total sampling value of the input can be adjusted by adjusting the amplification level of the amplifier. The corresponding design is as follows:

[0115] According to the relationship between the adjusted target sampling value and the actual total sampling value, the amplifier is adjusted to the corresponding amplification gear to adjust the actual total sampling value until the difference between the adjusted actual total sampling value and the target sampling value is less than the first preset accuracy difference, such as Figure 7 As shown, the method flow includes:

[0116] In step 701, when the actual total sampling value is greater than the adjusted target sampling value, and the difference between the actual total sampling value and the adjusted target sampling value is greater than or equal to the first preset precision difference, the amplification unit of the amplifier is reduced by one level, the adjusted target sampling value and the adjusted actual total sampling value are obtained again, and the size relationship between the adjusted target sampling value and the adjusted actual total sampling value is compared again until the difference between the adjusted actual total sampling value and the adjusted target sampling value is less than the first preset precision difference.

[0117] In step 702, when the actual total sampling value is less than the adjusted target sampling value, and the difference between the actual total sampling value and the adjusted target sampling value is greater than or equal to the first preset precision difference, the amplification unit of the amplifier is increased by one level, the adjusted target sampling value and the adjusted actual total sampling value are obtained again, and the size relationship between the adjusted target sampling value and the actual total sampling value is compared again until the difference between the adjusted actual total sampling value and the adjusted target sampling value is less than the first preset precision difference.

[0118] In this embodiment, the amplifier's amplification gear is adjusted one gear at a time to determine whether the current actual total sampling value meets the target sampling value requirement. If so, the adjustment is stopped; if not, the amplifier is adjusted. When the difference between the adjusted actual total sampling value and the target sampling value is less than the first preset accuracy difference, it means that the current actual total sampling value has met the target sampling value requirement.

[0119] In this embodiment, after the gear adjustment of the current amplifier is completed, the sampled values input by each channel need to be converted into optical power and reported. Therefore, this embodiment also involves the following designs:

[0120] The multi-channel optical module SOA calibration and gain control method also includes: Figure 8 As shown, the method flow includes:

[0121] In step 801 , the adjusted channel sampling value of each channel in the adjusted actual total sampling value is obtained.

[0122] In step 802, the adjusted sampling values of the respective channels are converted into optical power values of the optical signals output by the respective channels according to the corresponding relationship curves.

[0123] Example 2:

[0124] like Figure 9 FIG2 is a schematic diagram of a device for SOA calibration and gain control of a multi-channel optical module according to an embodiment of the present invention. The device for SOA calibration and gain control of a multi-channel optical module according to this embodiment includes one or more processors 41 and a memory 42 .

[0125] The processor 41 and the memory 42 may be connected via a bus or other means. Figure 9 The bus connection is taken as an example.

[0126] Memory 42, as a nonvolatile computer-readable storage medium, can be used to store nonvolatile software programs and nonvolatile computer-executable programs, such as the multi-channel optical module SOA calibration and gain control method described in the above embodiment. Processor 41 executes the multi-channel optical module SOA calibration and gain control method by running the nonvolatile software program and instructions stored in memory 42.

[0127] The memory 42 may include high-speed random access memory and non-volatile memory, such as at least one disk storage device, flash memory device, or other non-volatile solid-state memory device. In some embodiments, the memory 42 may optionally include a memory remotely located relative to the processor 41, and such remote memory may be connected to the processor 41 via a network. Examples of such networks include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0128] The program instructions / modules are stored in the memory 42 and, when executed by the one or more processors 41, perform the multi-channel optical module SOA calibration and gain control method in the above embodiment, for example, perform the above described Figures 1-8 The steps shown.

[0129] An embodiment of the present invention further provides a computer storage medium having computer program instructions stored thereon; when the computer program instructions are executed by a processor, the multi-channel optical module SOA calibration and gain control method provided in an embodiment of the present invention is implemented.

[0130] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A multi-channel optical module SOA calibration and gain control method, characterized in that: include: Setting a target sampling value, and calibrating the amplified current corresponding to different amplification gears in the amplifier according to the target sampling value to obtain the calibrated current corresponding to the different amplification gears of the amplifier; The amplifier is adjusted to the corresponding amplification gear according to the corresponding calibration current, and the corresponding no-light sampling threshold of each channel at different amplification gears is obtained by calibration; Obtaining a channel sampling value of each channel after being amplified by the amplifier, performing effective light judgment on each channel based on the channel sampling value of each channel and a corresponding no-light sampling threshold, obtaining the number of channels with effective light, adjusting the target sampling value based on the number of channels with effective light, and obtaining an actual total sampling value based on the channel sampling values of all channels; According to the size relationship between the adjusted target sampling value and the actual total sampling value, the amplifier is adjusted to the corresponding amplification gear to adjust the actual total sampling value until the difference between the adjusted actual total sampling value and the adjusted target sampling value is less than the first preset accuracy difference.

2. The multi-channel optical module SOA calibration and gain control method according to claim 1, characterized in that: The setting of the target sampling value specifically includes: Set the amplifier's magnification to maximum; Turn on all channels and input optical signals with preset optical power; The sampling value of each channel is obtained, and the sampling value of each channel is added to obtain the target sampling value.

3. The multi-channel optical module SOA calibration and gain control method according to claim 2, characterized in that: The step of calibrating the amplified currents corresponding to different amplification gears of the amplifier according to the target sampling value to obtain the calibrated currents corresponding to the different amplification gears of the amplifier specifically includes: Turn on all channels and input optical signals with preset optical power to all channels; The optical signal of the preset optical power is increased and adjusted multiple times according to the preset difference, and the optical signal after each adjustment is used for calibration corresponding to different amplification gears; In the calibration of the corresponding amplification gear, the corresponding adjusted optical signal is input, the sampling value of each channel is obtained, and the total sampling value of all channels is obtained; Comparing the total sampling value with the target sampling value, and adjusting the amplification current of the amplifier until the difference between the total sampling value and the target sampling value is less than a first preset accuracy difference; The current amplified current is used as the calibration current corresponding to the current amplification gear.

4. The multi-channel optical module SOA calibration and gain control method according to claim 1, characterized in that: The step of adjusting the amplifier to a corresponding amplification gear according to the corresponding calibration current and calibrating to obtain the corresponding no-light sampling threshold of each channel at different amplification gears specifically includes: Adjusting the amplified current of the amplifier to the corresponding calibration current to adjust the amplifier to the corresponding amplification gear; Turn on all channels, input optical signals with invalid optical power at the corresponding amplification level, and obtain sampling values for all channels; The obtained sampling value of each channel is used as the light-free sampling threshold of the corresponding channel under the corresponding amplification gear.

5. The multi-channel optical module SOA calibration and gain control method according to claim 1, characterized in that: The effective light judgment is performed on each channel according to the channel sampling value of each channel and the corresponding no-light sampling threshold, the number of channels with effective light is obtained, the target sampling value is adjusted according to the number of channels with effective light, and the actual total sampling value is obtained according to the channel sampling values of all channels, specifically including: Under the current amplification level, determine the relationship between the channel sampling value of each channel and the corresponding no-light sampling threshold of each channel; When the channel sampling value is greater than the no-light sampling threshold, there is valid light in the corresponding channel; when the channel sampling value is less than or equal to the no-light sampling threshold, there is invalid light in the corresponding channel; Obtaining a ratio between the number of channels with effective light and the total number of channels, and multiplying the target sampling value by the ratio to obtain an adjusted target sampling value; The channel sampling values of all channels are added together to obtain the actual total sampling value.

6. The multi-channel optical module SOA calibration and gain control method according to claim 1, characterized in that: The step of adjusting the amplifier to a corresponding amplification gear according to the relationship between the adjusted target sampling value and the actual total sampling value to adjust the actual total sampling value until the difference between the adjusted actual total sampling value and the target sampling value is less than a first preset accuracy difference includes: When the actual total sampling value is greater than the adjusted target sampling value, and the difference between the actual total sampling value and the adjusted target sampling value is greater than or equal to the first preset precision difference, the amplification unit of the amplifier is reduced by one gear, the adjusted target sampling value and the adjusted actual total sampling value are obtained again, and the size relationship between the adjusted target sampling value and the adjusted actual total sampling value is compared again until the difference between the adjusted actual total sampling value and the adjusted target sampling value is less than the first preset precision difference; When the actual total sampling value is less than the adjusted target sampling value, and the difference between the actual total sampling value and the adjusted target sampling value is greater than or equal to the first preset precision difference, the amplification unit of the amplifier is increased by one level, the adjusted target sampling value and the adjusted actual total sampling value are obtained again, and the size relationship between the adjusted target sampling value and the actual total sampling value is compared again until the difference between the adjusted actual total sampling value and the target sampling value is less than the first preset precision difference.

7. The multi-channel optical module SOA calibration and gain control method according to claim 1, characterized in that: The multi-channel optical module SOA calibration and gain control method further includes: Adjust the amplifier to the corresponding amplification gear according to the corresponding calibration current; Input an optical signal of corresponding power to each channel at each amplification level, and obtain a sampling value corresponding to each channel; At each amplification level, multiple sets of corresponding optical signal powers and sampling values are recorded for each channel. Quadratic fitting is performed based on the recorded multiple sets of corresponding optical signal powers and sampling values to obtain a relationship curve between the optical signal power and sampling values of the corresponding channel at the corresponding amplification level.

8. The multi-channel optical module SOA calibration and gain control method according to claim 7, characterized in that: The method further includes adjusting the amplifier to a corresponding amplification gear according to the magnitude relationship between the adjusted target sampling value and the actual total sampling value to adjust the actual total sampling value until the difference between the adjusted actual total sampling value and the target sampling value is less than a first preset accuracy difference value. Obtain the adjusted channel sampling value of each channel in the adjusted actual total sampling value; According to the corresponding relationship curve, the adjusted sampling values of the respective channels are converted into optical power values of the optical signals output by the respective channels.

9. A multi-channel optical module SOA calibration and gain control device, characterized in that: The invention comprises at least one processor and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the processor to perform the multi-channel optical module SOA calibration and gain control method according to any one of claims 1 to 8.

10. A non-volatile computer storage medium, characterized in that The computer storage medium stores computer program instructions, which, when executed by one or more processors, implement the multi-channel optical module SOA calibration and gain control method according to any one of claims 1 to 8.

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