Optical power measurement method

A measurement method and technology of optical power, applied in the direction of using electric radiation detectors for photometry, etc., can solve the problems of complex calculation formula and correction of optical power value and low precision.
CN101451885AInactive Publication Date: 2009-06-10XIDIAN UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
XIDIAN UNIV
Publication Date
2009-06-10
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses a light power measuring method with a log ratio amplifying circuit combined with software. Measuring process is: constructing light power calculating formula P=K<3>beta+C<3> according to the log ratio amplifying circuit in the measuring system; configuring an AD converter according to wavelength of measured light source; connecting the measured light source with the light end, picking a signal received at the light end, the AD converter reading in data N times circularly after photoelectric conversion and log amplification, solving an average value beta of N conversion values; judging whether value of beta exceeds measuring range, if so, measurement is over; if not, dividing the light source measured according to power of the standard light source; comparing beta value with an edge value of the standard light source, selecting corresponding K<3> and C<3> according to location where beta is; introducing determined beta, K<3> and C<3> values to the light power calculating formula to obtain a power value P of the measured signal. The invention, compared with current power measuring method, is simple in process, large in dynamic range, and high in precision for light power measurement of optical fiber communication.
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Description

technical field

[0001] The invention belongs to the field of optical fiber communication measurement, in particular to a method for measuring optical power, which can be used in optical power meter measuring instruments. Background technique

[0002] The principle of general optical power meter measurement is as follows: figure 1 Shown: The light detection diode PIN completes the conversion of optical signal to electrical signal, that is, when the measured light is irradiated on PIN, the input optical signal is converted into the corresponding electrical signal; since the input electrical signal is very weak, it is completed by a linear amplifier The electrical signal is amplified; the analog-to-digital converter ADC converts the electrical signal into a digital signal, which is convenient for digital processing and calculation of optical power values; the controller switches the optical power measurement range by selecting different resistance values.

[0003] Usually, opt...

Claims

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