| With the rapid development of photoelectric detection technology,optical power meters are widely used in optical fiber communication systems.It can be used not only for direct measurement of optical power,but also for relative measurement of optical loss.At present,many domestic optical power meters need to be imported,which are expensive and require various accessories,which is not convenient to use.The domestic similar test instruments have the problems of high price,low measurement accuracy,low working wavelength and insufficient measurement range;at the same time,the development of microprocessor technology in recent years has been rapid,and the intelligence of using the microprocessor as the central controller The instrument has made great progress.When optical fiber communication encounters intelligent testing,it will cause a new technological revolution in the field of measurement and control instruments.The measurement accuracy of the optical power meter of the current mainstream products is about 1% to 5%,which cannot meet the requirements of high accuracy.The lower measurement limit is about-70 d Bm and the operating wavelength is 2-6.This paper takes the working wavelength,dynamic measurement range and measurement accuracy of the optical power meter system as the main research objects,and designs an optical power meter system.The designed optical power meter is an optical power meter detection device with high test accuracy,wide dynamic range,and multiple working wavelengths.The optical power meter system uses a PIN photodiode to realize the photoelectric conversion of the signal,and uses a non-linear logarithmic amplifier and embedded technology to design an optical power meter.At the same time,it uses an arithmetic average filter algorithm and piecewise linearization in data processing.Wavelength selection,calculation method of indication value correction,achieving high accuracy,wide range,and many operating wavelengths.The actual measurement results show that the measurement accuracy of the optical power meter is below 1%,the measurement width can reach-80 d Bm-+ 10 d Bm,and the operating wavelength can reach more than 7,which meets the needs of optical power testing in optical fiber communication engineering and related scientific research and teaching. |
