A signal optical power detection device and detection method

Abstract

The invention relates to a signal light power detection instrument and a detection method, the instrument is used to detect the power of a light signal transmitted in an optical network, wherein, a noise source exists in the optical network and the instrument is positioned at the receiving terminal in the optical network and includes: a photoelectric conversion and amplifying device, which is used to receive the light signal, convert the signal into an electrical signal and to amplify the electrical signal; a filter circuit, which is used to receiving the amplified electrical signal, to conduct high-pass filtering to filter the low frequency noise in the amplified electrical signal, and to output a high-frequency signal; and a high-frequency power detection circuit, which is electrically connected with the filter circuit, used to detect the power of the high-frequency signal to determine whether a high-frequency signal is available and / or the power value of the high-frequency signal. By making use of the filter circuit and conducting detection at the receiving terminal, the invention doesn't need establish a protocol among nodes, and doesn't need special light modulation technology. The invention has the advantages of strong adaptability, small instrument volume, low cost and fast scanning velocity, and can realize the same signal detection effect depending on the actual stateof different systems.

Description

technical field [0001] The invention relates to a device for detecting optical signal power in an optical communication system, in particular to a low-cost device for detecting optical power in strong noise. Background technique [0002] In an optical communication system, signal optical power is a very important detection parameter. The value of signal optical power is an important symbol to measure the transmission quality of an optical communication system. At the same time, the signal power is also the judgment basis for the system to perform various protections and other special processing. Therefore, the detection of signal power is very important for optical communication systems. [0003] In optical communication systems, optical signal detection is generally realized by PIN photodiodes and APD avalanche photodiodes, and the detection frequency band can reach the range of 1250~1620nm width. The PIN / APD device can realize the conversion of optical signal to current, ...

AI Technical Summary

Problems solved by technology

[0008] 3. The sending end of the system uses a special frequency band within the amplified bandwidth to transmit control signals, and the receiving end of the system uses a special frequency band filter in the optical domain to detect the control signal. This special frequency band will not be used for business transmission

[0009] The above schemes either start from the perspective of the optical domain, or require the use of special modulation equipment, which has the disadvantages of high design cost, large equipment volume, slow detection speed, and the need for protocols at both ends.

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