A method and apparatus for multi-channel optical module SOA calibration and gain control

Abstract

The application provides a kind of multi-channel optical module SOA calibration and gain control method and device, set target sample value, according to the current of different amplification gear in amplifier is scaled according to target sample value;According to the corresponding scaling current adjustment to the corresponding amplification gear, the corresponding no-light sampling threshold of each channel under different amplification gear is obtained by scaling;According to the no-light sampling threshold, the effective light of each channel is judged, and the actual total sample value is obtained according to the number of channels with effective light;According to the size relationship between the target sample value and the actual total sample value after adjustment, the amplifier is adjusted to the corresponding amplification gear, to adjust the actual total sample value to the allowable error range of target sample value;Through the scaling of target sample value and amplification gear and the judgment of effective light of each channel, the automatic control adjustment of amplification gain of multi-channel optical transceiver is realized.

Description

Technical Field

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

[0002] In existing technologies, semiconductor optical amplifiers (SOA) can be directly applied to single-channel optical transceiver scenarios. However, as the requirements of optical communication applications gradually increase, the application of multi-channel optical transceiver scenarios is becoming more and more widespread. But 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. Furthermore, the activation status of each channel also varies in actual applications. Therefore, controlling the amplification gain of multiple channels simultaneously through the amplifier is quite complex, and it is difficult to achieve automatic adjustment while ensuring stable amplification gain.

[0003] Therefore, overcoming the shortcomings of the existing technology is an urgent problem to be solved in this technical field. Summary of the Invention

[0004] The technical problem to be solved by this invention is how to automatically control and adjust the amplification gain of multi-channel optical transceivers.

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

[0006] Firstly, a method for SOA calibration and gain control of a multi-channel optical module is provided, including:

[0007] Set a target sampling value, and calibrate the amplification current corresponding to different amplification levels in the amplifier based on the target sampling value to obtain the calibration current corresponding to different amplification levels of the amplifier.

[0008] The amplifier is adjusted to the corresponding amplification level according to the corresponding calibration current, and the light-free sampling threshold corresponding to each channel at different amplification levels is obtained through calibration.

[0009] The sampled value of each channel after amplification is obtained. Based on the sampled value of each channel and the corresponding no-light sampling threshold, the effective light of each channel is judged to obtain the number of channels with effective light. The target sampled value is adjusted according to the number of channels with effective light. The actual total sampled value is obtained based on the sampled values ​​of all channels.

[0010] Based on the relationship between the adjusted target sample value and the actual total sample value, the amplifier is adjusted to the corresponding amplification level to adjust the actual total sample value until the difference between the adjusted actual total sample value and the adjusted target sample 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 amplification factor to maximum;

[0013] Open all channels and input an optical signal with the preset optical power;

[0014] Obtain the sampled value of each channel, and add the sampled values ​​of each channel together to obtain the target sampled value.

[0015] Preferably, the step of calibrating the amplification current corresponding to different amplification levels in the amplifier based on the target sampled value to obtain the calibration current corresponding to different amplification levels of the amplifier specifically includes:

[0016] Open all channels and input optical signals with preset optical power into all channels;

[0017] The optical signal with the preset optical power is increased and adjusted multiple times according to the preset difference. The optical signal after each adjustment is used for calibration corresponding to different amplification levels.

[0018] In the calibration of the corresponding amplification level, input the corresponding adjusted optical signal, obtain the sample value of each channel, and obtain the total sample value of all channels;

[0019] The total sampled value is compared with the target sampled value, and the amplification current of the amplifier is adjusted until the difference between the total sampled value and the target sampled value is less than a first preset accuracy difference.

[0020] Use the current amplification current as the calibration current corresponding to the current amplification level.

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

[0022] Adjust the amplifier's amplification current to the corresponding calibration current to adjust the amplifier to the appropriate amplification level;

[0023] Open all channels, input an optical signal with invalid optical power at the corresponding amplification level, and obtain the sampled values ​​of all channels;

[0024] The obtained sample values ​​of each channel are used as the no-light sampling threshold for the corresponding channel at the corresponding magnification level.

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

[0026] At the current magnification level, determine the relationship between the channel sample value of each channel and the corresponding no-light sampling threshold for each channel;

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

[0028] Obtain the ratio between the number of channels with effective light and the total number of channels, and multiply the target sample value by the ratio to obtain the adjusted target sample value;

[0029] The actual total sample value is obtained by summing the sample values ​​of all channels.

[0030] Preferably, the step of adjusting the amplifier to the corresponding amplification level based on the relationship between the adjusted target sample value and the actual total sample value, so as to adjust the actual total sample value until the difference between the adjusted actual total sample value and the target sample value is less than a first preset precision difference, specifically includes:

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

[0032] When the actual total sample value is less than the adjusted target sample value, and the difference between the actual total sample value and the adjusted target sample value is greater than or equal to the first preset precision difference, the amplifier's amplification unit is increased by one level, the adjusted target sample value and the adjusted actual total sample value are obtained again, and the magnitude relationship between the adjusted target sample value and the actual total sample value is compared again, until the difference between the adjusted actual total sample value and the target sample 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 level according to the corresponding calibration current;

[0035] At each amplification level, a corresponding power optical signal is input to each channel to obtain the corresponding sample value for each channel;

[0036] For each channel at each amplification level, multiple sets of corresponding optical signal power and sample values ​​are recorded. Based on the recorded multiple sets of corresponding optical signal power and sample values, a second fitting is performed to obtain the relationship curve between the optical signal power and sample value of the corresponding channel at the corresponding amplification level.

[0037] Preferably, the step of adjusting the amplifier to the corresponding amplification level based on the relationship between the adjusted target sample value and the actual total sample value, so as to adjust the actual total sample value until the difference between the adjusted actual total sample value and the target sample value is less than a first preset accuracy difference, further includes:

[0038] Obtain the adjusted channel sample values ​​for each channel from the adjusted actual total sample value;

[0039] Based on the corresponding relationship curves, the adjusted sampled values ​​of each channel are converted into the optical power values ​​of the optical signals output by each channel.

[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, the instructions being executed by the processor to perform the multi-channel optical module SOA calibration and gain control method.

[0041] Thirdly, the present invention also provides a non-volatile computer storage medium storing computer-executable instructions that are executed by one or more processors to perform the method described in the first aspect.

[0042] Fourthly, a chip is provided, comprising: a processor and an interface for calling and running a computer program stored in memory, performing the method as described in the first aspect.

[0043] Fifthly, a computer program product containing instructions is provided that, when executed on a computer or processor, causes the computer or processor to perform the method as described in the first aspect.

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

[0045] This invention provides a method and apparatus for SOA calibration and gain control of a multi-channel optical module. The method involves setting a target sampling value, calibrating the current at different amplification levels in the amplifier based on the target sampling value, adjusting the current to the corresponding amplification level based on the calibration current, and obtaining the no-light sampling threshold for each channel at different amplification levels. Based on the no-light sampling threshold, effective light is determined for each channel, and the target sampling value is adjusted according to the number of channels with effective light, resulting in the actual total sampling value. Based on the relationship between the adjusted target sampling value and the actual total sampling value, the amplifier is adjusted to the corresponding amplification level to bring the actual total sampling value within the allowable error range of the target sampling value. Through the above calibration of the target sampling value and amplification level, and the determination of effective light for each channel, the accurate acquisition of relevant parameters for different channels at different amplification levels is ensured, guaranteeing accurate control of the amplification gain of the multi-channel optical transceiver, and realizing automatic control and adjustment of the amplification gain for multi-channel optical transceiver. Attached Figure Description

[0046] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments of the present invention will be briefly described below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

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

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

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

[0050] Figure 4 This is a flowchart of a method for obtaining the no-light sampling threshold of each channel at each amplification level in a multi-channel optical module SOA calibration and gain control method provided in an embodiment of the present invention.

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

[0052] Figure 6 This is a flowchart illustrating the method for adjusting the target sample value in the practical application of a multi-channel optical module SOA calibration and gain control method provided in this embodiment of the invention.

[0053] Figure 7 This is a flowchart illustrating the practical application of a multi-channel optical module SOA calibration and gain control method provided in this embodiment of the invention, specifically the method for adjusting the amplification level.

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

[0055] Figure 9 This is a schematic diagram of a multi-channel optical module SOA calibration and gain control device provided in an embodiment of the present invention. Detailed Implementation

[0056] To make the objectives, technical solutions, and advantages of this invention clearer, the 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 merely illustrative and not intended to limit the invention.

[0057] In the description of this invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0058] In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this disclosure, unless otherwise stated, "a plurality of" means two or more. Furthermore, for example, the description may use the prefix "A" or "B" to describe the same type of nouns as two independent entities. In this case, the corresponding features defined with "A" and "B" are used only to distinguish between similar entities and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features.

[0059] As used in this invention, “about,” “approximately,” or “approximately” includes the stated value and the average value within an acceptable range of deviation from a particular value, wherein the acceptable range of deviation is determined by a person skilled in the art taking into account the measurement under discussion and the error associated with the measurement of the particular quantity, i.e., the limitations of the measurement system.

[0060] Unless the context otherwise requires, throughout the specification and claims, the term "comprising" is interpreted as openly inclusive, meaning "including, but not limited to." In the description of the specification, terms such as "one embodiment," "some embodiments," "exemplary embodiment," "example," "specific example," or "some examples" are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of this disclosure. The illustrative representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics mentioned may be included in any suitable manner in any one or more embodiments or examples; that is, although they may be incorporated into embodiments or examples using the above terms for reasons such as order and position, it does not limit them to be incorporated in combination by a single embodiment or example.

[0061] Furthermore, 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] Example 1:

[0063] This invention provides a method for SOA calibration and gain control of a multi-channel optical module, such as... Figure 1 As shown, it includes:

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

[0065] The method provided in this embodiment is applied to the control of the amplification gain provided by the amplifier. The amplifier can amplify the optical power of the optical signal to different 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 excessively low optical power, and on the other hand, it is necessary to avoid damaging the hardware due to excessively 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 a suitable range.

[0066] It should be noted that in the scenario where 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 an amplifier.

[0067] The target sampling value is the sum of the sampling values ​​corresponding to the relatively suitable optical signals received by the receiving end on each channel after the optical signal is amplified by the amplifier, when all optical path channels in the hardware are open and transmitting effective light. This optical signal can ensure relatively good transmission performance without damaging 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 optical power. The sampling value or target sampling value can be converted into the corresponding optical power through appropriate calculations. In this embodiment, the target sampling value is set by those skilled in the art based on the optical path performance requirements and hardware performance, combined with the amplifier. The target sampling value is used as a benchmark for subsequent calibration of various parameters.

[0068] In this embodiment, since the intensity of the input optical signal and the number of channels opened may vary during actual optical signal transmission, it is necessary to adjust the amplifier gain to ensure that the sampled value of the amplified optical signal meets the target sampled value standard. Therefore, the amplifier 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, which facilitates direct control of the amplifier in the future. Since different amplification gains are achieved by applying different amplification currents to the amplifier, the calibration of different amplification levels is essentially the calibration of the amplification current required for different amplification gains, i.e., the calibration current. When the amplifier needs to provide the corresponding amplification gain, the corresponding calibration current is provided to the amplifier.

[0069] In step 102, the amplifier is adjusted to the corresponding amplification level according to the corresponding calibration current, and the light-free sampling threshold corresponding to each channel at different amplification levels is obtained through calibration.

[0070] Furthermore, since not all channels used for transmitting optical signals may be active during actual optical signal transmission and reception, and the target sampling value is set under the condition that all channels are active and transmitting optical signals effectively, the target sampling value used as a reference standard needs to be adjusted according to the actual number of active channels if not all channels are active in actual application. Therefore, during actual optical signal transmission and reception, it is necessary to pre-determine the number of active optical channels (i.e., optical channels with effective light). In this embodiment, the basis for determining whether a single channel has effective light is whether the sampling value of that channel is greater than a certain threshold, i.e., the no-light sampling threshold. However, since different channels and different amplification levels will cause changes in the sampling value of the optical signal, different no-light sampling thresholds need to be pre-calibrated for different channels under different amplification levels. This is used to determine whether each different channel has effective light under different amplification levels during subsequent actual optical signal reception.

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

[0072] The channel sampling value is the sampled value of each channel during actual optical signal reception after the pre-calibration step. Considering that the intensity of the transmitted optical signal and the number of activated channels may change during actual optical signal transmission, it is necessary to determine in real time whether the total sampling value of all activated channels meets the requirements of transmission performance and hardware performance, and adjust the amplifier gain in real time to ensure that the total sampling value of all activated channels meets the corresponding requirements. Specifically, each channel first finds the corresponding no-light sampling threshold using the current amplifier's amplification level to determine whether the channel has effective light at the current amplification level, obtaining the number of channels with effective light, and then adjusting the originally set target sampling value. The adjusted target sampling value serves as the standard for amplification gain adjustment in subsequent steps. For example, if there are 6 channels, and 4 channels have effective light in actual applications, 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.

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

[0074] In this embodiment, since it is difficult to adjust the actual total sample value to be completely consistent with the target sample value by adjusting the amplifier switching position, the actual total sample value can be adjusted to be within the range of the positive and negative first preset precision difference of the target sample value. The first preset precision difference is set by those skilled in the art according to the actual situation. In this embodiment, the first preset precision difference can be 600 AD.

[0075] Using the above method, the amplifier is calibrated at different amplification levels according to the set target sampling value, and the no-light sampling threshold of each channel at different amplification levels is calibrated to facilitate the determination of the activation status of multiple channels. The sum of the sampling values ​​of all channels is compared with the target sampling value, thereby adjusting the amplification gain of the amplifier to achieve multi-channel amplification gain adjustment.

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

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

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

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

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

[0081] In this embodiment, since the optical power of the input optical signal is the lowest when the amplifier's amplification factor is at its maximum, the overall module performance is optimal at this time. Therefore, the sum of the sampled values ​​of all channels under this condition is taken as the target sampled value.

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

[0083] Furthermore, in this embodiment, the amplifier's various ranges are pre-calibrated based on the target sampling value to facilitate subsequent adjustments to the amplifier's range switching. Specifically, the following design is involved:

[0084] The amplifier current corresponding to different amplification levels is calibrated based on the target sampled value to obtain the calibration current corresponding to different amplification levels of the amplifier, such as... Figure 3 As shown, the specific method and process include:

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

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

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

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

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

[0090] In this embodiment, while keeping the amplification gain constant, 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 level.

[0091] It is important to note that after obtaining the calibration current corresponding to all amplification levels, it is necessary to determine whether the calibration current of each amplification level decreases linearly from large to small. If so, it means that the calibration current of all amplification levels is qualified; otherwise, it means that the corresponding calibration current is unqualified.

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

[0093] The amplifier is calibrated with 15 amplification levels, with the maximum amplification factor designated as the maximum level 15. At this level, the input optical signal power is -16dBm, and the total sampled value from all channels at this point is taken as the target sampled value. The input optical signal power is then adjusted to -14.5dBm, and the amplification current is adjusted to ensure the total sampled value meets the target value; this amplification current is used as the calibration current for level 14. The input optical signal power is then adjusted to -13dBm, and the amplification current is adjusted to ensure the total sampled value meets the target value; this amplification current is used as the calibration current for level 13. Finally, the input optical signal power is adjusted to -11.5dBm, and the amplification current is adjusted... The current is adjusted to ensure the total sampled value meets the target sampled value; this amplification current is used as the calibration current for the 12th level. The input optical signal power is adjusted to -10dBm, and the amplification current is adjusted to ensure the total sampled value meets the target sampled value; this amplification current is used as the calibration current for the 11th level. The input optical signal power is adjusted to -8.5dBm, and the amplification current is adjusted to ensure the total sampled value meets the target sampled value; this amplification current is used as the calibration current for the 10th level. The input optical signal power is adjusted to -7dBm, and the amplification current is adjusted to ensure the total sampled value meets the target sampled value; this amplification current is used as the calibration current for the 9th level. The input optical signal power is adjusted to... -5.5dBm, adjust the amplification current to make the total sampled value meet the target sampled value, and use the amplification current at this time as the calibration current for the 8th level; adjust the input optical signal power to -4dBm, adjust the amplification current to make the total sampled value meet the target sampled value, and use the amplification current at this time as the calibration current for the 7th level; adjust the input optical signal power to -2.5dBm, adjust the amplification current to make the total sampled value meet the target sampled value, and use the amplification current at this time as the calibration current for the 6th level; adjust the input optical signal power to -1dBm, adjust the amplification current to make the total sampled value meet the target sampled value, and use the amplification current at this time as the calibration current for the 5th level; adjust the input optical signal power to -1dBm, adjust the amplification current to make the total sampled value meet the target sampled value, and use the amplification current at this time as the calibration current for the 5th level; The input optical signal power is adjusted to 0 dBm, and the amplification current is adjusted to make the total sampled value meet the target sampled value. The amplification current at this time is used as the calibration current for the 4th level. The input optical signal power is adjusted to 1 dBm, and the amplification current is adjusted to make the total sampled value meet the target sampled value. The amplification current at this time is used as the calibration current for the 3rd level. The input optical signal power is adjusted to 2 dBm, and the amplification current is adjusted to make the total sampled value meet the target sampled value. The amplification current at this time is used as the calibration current for the 2nd level. The input optical signal power is adjusted to 3 dBm, and the amplification current is adjusted to make the total sampled value meet the target sampled value. The amplification current at this time is used as the calibration current for the 1st level.

[0094] Furthermore, in this embodiment, the following design is used to calibrate the no-light sampling threshold for each channel at different magnification levels:

[0095] The amplifier is adjusted to the corresponding amplification level according to the corresponding calibration current, and the calibration is used to obtain the no-light sampling threshold for each channel at different amplification levels, such as... Figure 4 As shown, the method flow includes:

[0096] In step 401, the amplifier's amplification current is adjusted to the corresponding calibration current so that the amplifier is adjusted to the corresponding amplification level.

[0097] In step 402, all channels are turned on, and at the corresponding amplification level, an optical signal with invalid optical power is input to obtain the sampled values ​​of all channels.

[0098] In step 403, the obtained sample values ​​of each channel are used as the no-light sampling threshold of the corresponding channel under the corresponding magnification level.

[0099] In this embodiment, the invalid light power is set by those skilled in the art based on actual conditions. When an invalid light power optical signal is input, regardless of the amplifier's amplification level, each channel remains in an invalid light state. However, due to differences in amplification levels and channels, the sampled values ​​output by each channel at different amplification levels are still different. These output sampled values ​​are the no-light sampling threshold for that channel at the current amplification level. In this embodiment, the preset no-light power can be -40dBm.

[0100] It should be noted that since the preset no-light power is the same, the sampled values ​​output by the corresponding channels will still be different after amplification at different amplification levels. For each channel, the no-light sampling threshold corresponding to the amplification level should decrease linearly from large to small. 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 levels, in addition to calibrating the no-light sampling thresholds of each channel at different levels, the relationship curves between the optical signal power and the sampled values ​​of each channel at different levels can also be calibrated. This is used to realize the conversion between the sampled values ​​and optical power of each channel, facilitating subsequent processing and application of the optical power data of each channel. Therefore, this embodiment also involves the following design:

[0102] The step of adjusting the amplifier to the corresponding amplification level according to the corresponding calibration current, and calibrating to obtain the no-light sampling threshold for each channel at different amplification levels, also includes, for example: Figure 5As shown, the method for obtaining the relationship curves between optical signal power and sampled values ​​at different levels for each channel is as follows:

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

[0104] In step 502, an optical signal with the corresponding power is input to each channel at each amplification level to obtain the sample value corresponding to each channel.

[0105] In step 503, multiple sets of corresponding optical signal power and sample values ​​are recorded for each channel at each amplification level. Based on the recorded multiple sets of corresponding optical signal power and sample values, a second fitting is performed to obtain the relationship curve between the optical signal power and sample value of the corresponding channel at the corresponding amplification level.

[0106] It is 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 power and sampled values ​​are obtained, and a secondary fitting is performed to obtain the 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 it is necessary to convert sampled values ​​to optical power later, they can be called from the configuration table.

[0107] Furthermore, after completing the calibration of the amplification levels, the calibration of the no-light sampling thresholds for each channel at each amplification level, and the calibration of the relationship curve between optical signal power and sampled values, that is, in the practical application of the multi-channel amplifier in the optical signal receiving scenario, it is first necessary to determine the input quantity of the channel with effective light in the multi-channel amplifier, such as... Figure 6 As shown, the method flow includes:

[0108] The process involves determining the effective light for each channel based on its channel sampling value and the 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 finally obtaining the actual total sampling value based on the channel sampling values ​​of all channels. Specifically, this includes:

[0109] In step 601, at the current magnification level, the relationship between the channel sample value of each channel and the corresponding no-light sampling threshold 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 sample value is multiplied by the ratio to obtain the adjusted target sample value.

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

[0113] Each channel first finds its corresponding no-light sampling threshold using the current amplifier's amplification level to determine whether the channel has effective light at that level. The number of channels with effective light is then determined, and the originally set target sampling value is adjusted accordingly. This adjusted target sampling value serves as the standard for subsequent amplification gain adjustments. For example, if there are 6 channels, and 4 channels actually have effective light, the original target sampling value is adjusted to 2 / 3 of its original value. The actual total sampling value is obtained by summing the channel sampling values ​​of all channels.

[0114] Furthermore, once the number of all channels with effective light has been determined and the target sampling value has been adjusted accordingly, the actual total input sampling value can be adjusted by changing the amplifier's amplification level. The corresponding design is as follows:

[0115] Based on the relationship between the adjusted target sample value and the actual total sample value, the amplifier is adjusted to the corresponding amplification level to adjust the actual total sample value until the difference between the adjusted actual total sample value and the target sample value is less than a first preset accuracy difference. Figure 7 As shown, the method flow includes:

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

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

[0118] In this embodiment, when adjusting the amplifier's amplification level, one level is adjusted each time. It is then determined whether the current actual total sampled value meets the target sampled value requirement. If it does, the adjustment stops; otherwise, the amplifier is adjusted. When the difference between the adjusted actual total sampled value and the target sampled value is less than a first preset precision difference, it means that the current actual total sampled value has met the target sampled value requirement.

[0119] In this embodiment, after the current amplifier level adjustment is completed, it is necessary to convert the sampled values ​​input from each channel into optical power and report them. Therefore, this embodiment also involves the following design:

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

[0121] In step 801, the adjusted channel sample values ​​of each channel in the adjusted actual total sample value are obtained.

[0122] In step 802, the adjusted sampled values ​​of each channel are converted into the optical power values ​​of the optical signals output by each channel according to the corresponding relationship curves.

[0123] Example 2:

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

[0125] Processor 41 and memory 42 can be connected via a bus or other means. Figure 9 Taking the bus connection between China and Israel as an example.

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

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

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

[0129] This invention also provides a computer storage medium storing computer program instructions; when these computer program instructions are executed by a processor, they implement the multi-channel optical module SOA calibration and gain control method provided in this invention.

[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 within the protection scope of the present invention.

Claims

1. A method for SOA calibration and gain control of a multi-channel optical module, characterized in that, include: Set a target sampling value, and calibrate the amplification current corresponding to different amplification levels in the amplifier based on the target sampling value to obtain the calibration current corresponding to different amplification levels of the amplifier. The amplifier is adjusted to the corresponding amplification level according to the corresponding calibration current, and the light-free sampling threshold corresponding to each channel at different amplification levels is obtained through calibration. The sampled value of each channel after amplification is obtained. Based on the sampled value of each channel and the corresponding no-light sampling threshold, the effective light of each channel is judged to obtain the number of channels with effective light. The target sampled value is adjusted according to the number of channels with effective light. The actual total sampled value is obtained based on the sampled values ​​of all channels. Based on the relationship between the adjusted target sample value and the actual total sample value, the amplifier is adjusted to the corresponding amplification level to adjust the actual total sample value until the difference between the adjusted actual total sample value and the adjusted target sample 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 set target sampling value specifically includes: Set the amplifier's amplification factor to maximum; Open all channels and input an optical signal with the preset optical power; Obtain the sampled value of each channel, and add the sampled values ​​of each channel together to obtain the target sampled 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 amplification current corresponding to different amplification levels in the amplifier based on the target sampled value to obtain the calibration current corresponding to different amplification levels of the amplifier specifically includes: Open all channels and input optical signals with preset optical power into all channels; The optical signal with the preset optical power is increased and adjusted multiple times according to the preset difference. The optical signal after each adjustment is used for calibration corresponding to different amplification levels. In the calibration of the corresponding amplification level, input the corresponding adjusted optical signal, obtain the sample value of each channel, and obtain the total sample value of all channels; The total sampled value is compared with the target sampled value, and the amplification current of the amplifier is adjusted until the difference between the total sampled value and the target sampled value is less than a first preset accuracy difference. Use the current amplification current as the calibration current corresponding to the current amplification level.

4. The multi-channel optical module SOA calibration and gain control method according to claim 1, characterized in that, The process of adjusting the amplifier to the corresponding amplification level based on the corresponding calibration current, and calibrating to obtain the no-light sampling threshold for each channel at different amplification levels, specifically includes: Adjust the amplifier's amplification current to the corresponding calibration current to adjust the amplifier to the appropriate amplification level; Open all channels, input an optical signal with invalid optical power at the corresponding amplification level, and obtain the sampled values ​​of all channels; The obtained sample values ​​of each channel are used as the no-light sampling threshold for the corresponding channel at the corresponding magnification level.

5. The multi-channel optical module SOA calibration and gain control method according to claim 1, characterized in that, The process involves determining the effective light for each channel based on its channel sampling value and the 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 finally obtaining the actual total sampling value based on the channel sampling values ​​of all channels. Specifically, this includes: At the current magnification level, determine the relationship between the channel sample value of each channel and the corresponding no-light sampling threshold for each channel; When the channel sample value is greater than the no-light sampling threshold, there is valid light in the corresponding channel; when the channel sample value is less than or equal to the no-light sampling threshold, there is invalid light in the corresponding channel. Obtain the ratio between the number of channels with effective light and the total number of channels, and multiply the target sample value by the ratio to obtain the adjusted target sample value; The actual total sample value is obtained by summing the sample values ​​of all channels.

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 the corresponding amplification level based on the relationship between the adjusted target sample value and the actual total sample value, so as to adjust the actual total sample value until the difference between the adjusted actual total sample value and the target sample value is less than a first preset accuracy difference, specifically includes: When the actual total sample value is greater than the adjusted target sample value, and the difference between the actual total sample value and the adjusted target sample value is greater than or equal to the first preset precision difference, the amplifier's amplification unit is reduced by one level, the adjusted target sample value and the adjusted actual total sample value are obtained again, and the magnitude relationship between the adjusted target sample value and the adjusted actual total sample value is compared again, until the difference between the adjusted actual total sample value and the adjusted target sample value is less than the first preset precision difference; When the actual total sample value is less than the adjusted target sample value, and the difference between the actual total sample value and the adjusted target sample value is greater than or equal to the first preset precision difference, the amplifier's amplification unit is increased by one level, the adjusted target sample value and the adjusted actual total sample value are obtained again, and the magnitude relationship between the adjusted target sample value and the actual total sample value is compared again, until the difference between the adjusted actual total sample value and the target sample 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 also includes: Adjust the amplifier to the corresponding amplification level according to the corresponding calibration current; At each amplification level, input the optical signal with the corresponding power to each channel and obtain the sample value corresponding to each channel; For each channel at each amplification level, multiple sets of corresponding optical signal power and sample values ​​are recorded. Based on the recorded multiple sets of corresponding optical signal power and sample values, a secondary fitting is performed to obtain the relationship curve between the optical signal power and sample value 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 step of adjusting the amplifier to the corresponding amplification level based on the relationship between the adjusted target sample value and the actual total sample value, so as to adjust the actual total sample value until the difference between the adjusted actual total sample value and the target sample value is less than a first preset accuracy difference, further includes: Obtain the adjusted channel sample values ​​for each channel in the adjusted actual total sample value; Based on the corresponding relationship curves, the adjusted sampled values ​​of each channel are converted into the optical power values ​​of the optical signals output by each channel.

9. A multi-channel optical module SOA calibration and gain control device, characterized in that, The method includes 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, the instructions being executed by the processor for performing the multi-channel optical module SOA calibration and gain control method according to any one of claims 1-8.

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

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