Optical power meter for testing passive optical network

Abstract

The invention relates to an optical power meter for testing a passive optical network, comprising a bidirectional coupler, wherein the bidirectional coupler splits an uplink signal and then is directly connected to a 1310 nm burst module; in addition, the bidirectional coupler splits the wavelength by using a WDM (Wavelength Division Multiplex) with high isolation after splitting a downlink signal and then is respectively connected to a 1490 nm module and a 1550 nm module which are connected with an MCU (Microprogrammed Control Unit) through an A / D conversion module; the 1310 nm burst module is converted into proportional current by using a high-speed optical detector PIN (Personal identification Number) tube and is converted into a voltage signal by using a preposed amplifying circuit formed by a preposed high-speed wideband amplifier; the voltage signal is subjected to signal shaping and is respectively connected with a voltage sampling circuit and a comparison circuit; the comparison circuit is connected with the MCU through a time delay circuit and a trigger circuit; one path of the voltage sampling circuit is connected with the MCU through the A / D conversion module; and the other path of the voltage sampling circuit is connected with the MCU through the trigger circuit. The invention has the benefits of measuring a burst 1310 nm signal, thereby solving the problem of power measurement in the installation process of the PON (Passive Optical Network).

Description

technical field [0001] The invention relates to an optical power meter for testing a passive optical network, in particular to a circuit module of the optical power meter. Background technique [0002] At present, FTTx (collectively referred to as fiber-to-the-home, fiber-to-the-building, and fiber-to-the-premises, etc.) network construction is becoming a hot spot in the construction of access networks at home and abroad. Passive Optical Network (PON) access network technology is recognized as the best solution for FTTx in the industry. This technology allows multiple users to share a single optical fiber, so that no active optical distribution network (ODN) needs to be used. Devices, that is, do not need to pass through optical / electrical / optical (O / E / O) conversion, this point-to-multipoint architecture greatly reduces network installation, management and maintenance costs. The new generation of network construction will inevitably bring new testing problems, which require...

AI Technical Summary

Problems solved by technology

[0004] The standard optical power meter in the prior art can only correctly test the continuous optical signal, so if the traditional optical power meter (recording the average optical power in a sampling period) is used, the correct test result cannot be obtained, thus giving a negative impact on the installation of the network Maintenance brings difficulties, so a new type of optical power meter that can meet the power test requirements of PON systems is required

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