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A Continuously Adjustable Optical Attenuator Data Processing Method
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A data processing and optical attenuator technology, applied in the field of optical communication, can solve the problems of heavy data collection workload, poor precision, and large data volume, and achieve the effects of improving data collection efficiency, reducing processing time, and improving operating efficiency
Active Publication Date: 2022-05-06
BENGBU COLLEGE
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[0004] However, the traditional continuously adjustable attenuator uses the attenuation data collected at different attenuation points to make an attenuation curve comparison table. The workload of data collection is very huge, and the traditional measurement method is low in efficiency and poor in accuracy.
For example, when the attenuation resolution is 0.005dB, the attenuation of 60dB needs to collect 12,000 data, which is huge and cumbersome. The production of tables with a large amount of data also has an adverse effect on data storage and calculation speed. The traditional measurement method is difficult to meet the measurement requirements and Production efficiency requirements, so a continuously adjustable optical attenuator data processing method is needed
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Embodiment 1
[0044] The attenuation range wavelength of the attenuator is 1200nm-1650nm, according to formula (1) and formula (2) set the attenuation 30dB at 1310nm wavelength.
[0045] First, according to formula (2), 30dB attenuation at 1310nm is converted to the attenuation value at the reference wavelength of 1200nm,
[0046]
[0047] The attenuation value at 1200nm can be obtained as θ A = 21.778dB.
[0048] Substituting the above results into formula (1),
[0049]
[0050] The pulse value X of the stepping motor can be obtained = 10389, so to ensure the attenuation of 30dB at the wavelength of 1310nm, the pulse value of 10389 should be sent to the stepping motor.
[0051] The inverse formula is:
[0052]
[0053]
[0054] According to the reverse deduction formula, the corresponding relationship between the attenuation value of any point and the pulse value of the stepper motor can be calculated.
[0055] However, in the actual detection, due to the influence of the pro...
Embodiment 2
[0057] refer to figure 2 , in the actual data collection, the attenuation data increases linearly, but the attenuation value deviates in individual intervals (in the figure, the attenuation value 8 represents 0.08dB, and the data format can be deduced by analogy).
[0058] Table 1 Relationship between stepper motor pulse value and attenuation value at reference wavelength
[0059]
[0060] The stepper motor drives the attenuator to move from the reference position. According to formula (1), the attenuation data increases linearly, that is, the stepper motor advances 50 step pulses in theory, and the attenuation value increases by 10, which is 0.1dB. It is calculated by the homemade software of the host computer The gap between the current attenuation value and the theoretical value,
[0061] If the error is less than 0.05dB, then the interval will directly calculate the pulse value of the stepping motor according to the linear difference method, and perform attenuation co...
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Abstract
The invention discloses a continuously adjustable optical attenuator data processing method, which relates to the technical field of optical communication and includes the following steps: collecting attenuation data through a data acquisition system: the attenuation data includes the moving number of a stepping motor and the current high-precision The power value of the power meter; the attenuation data collected by the data acquisition system is screened to obtain the corresponding relationship between the pulse value of the stepping motor and the actual attenuation value; the attenuation curve table of the attenuator is made. The present invention builds a data acquisition system, adopts automatic control and reading instead of manual measurement, and improves the efficiency of data acquisition; analyzes, summarizes, and extracts attenuation curves for the collected data, simplifies data, greatly reduces the amount of attenuation table data, reduces Reduced table query processing time and improved operating efficiency.
Description
technical field [0001] The invention relates to the technical field of optical communication, in particular to a continuously adjustable optical attenuator data processing method. Background technique [0002] The optical attenuator is an important optical passive device. It can attenuate the energy of the optical signal by absorbing or reflecting the optical power margin. The optical attenuator is often used in system loss evaluation and various tests. It has been used in the field of optical communication. widely used. [0003] Optical attenuators can generally be divided into fixed attenuators, graded adjustable attenuators, continuously adjustable attenuators, etc. In order to make the attenuation value more accurate, it is necessary to collect attenuation data at different attenuation points to make an attenuation curve comparison table. [0004] However, the traditional continuously adjustable attenuator uses the attenuation data collected at different attenuation poi...
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