Multifunctional Optical Time Domain Reflectometer Based on Embedded System

Abstract

The invention relates to a multifunctional optical time domain reflectometer (OTDR) based on an embedded system. The multifunctional OTDR is characterized by comprising a field programmable gate array (FPGA) sampling motherboard, a visible red laser source (VLS) module, a light power meter module, an end face detection module, a liquid crystal screen display module, a key module, an advanced reduced instruction set computer (RISC) machine (ARM) 11 embedded motherboard and a peripheral interface circuit, wherein the ARM11 embedded motherboard is connected with the FPGA sampling motherboard, the VLS module, the light power meter module, the end face detection module, the liquid crystal screen display module, the key module and the peripheral interface circuit; and a power management circuit supplies power to all modules. The invention has the advantages that the problems of the conventional imported and domestic OTDR are solved; and the multifunctional OTDR which is convenient to control, small in size and convenient to carry is provided under the actual using conditions.

Description

technical field [0001] The invention relates to an instrument for analyzing the time domain of light, in particular to a circuit module of the instrument. Background technique [0002] Standing out from optical communication, optical fiber communication technology has become one of the main pillars of modern communication and plays a pivotal role in modern telecommunication networks. As an emerging technology, optical fiber communication has been developing rapidly and widely used in recent years, which is rare in the history of communication. It is also an important symbol of the world's new technology revolution and the main transmission tool for various information in the future information society. [0003] Optical fiber is currently the transmission medium of light in optical communication, and the physical characteristics of optical fiber are fragile, fragile, and easy to break, so the installation and maintenance of optical fiber is very important. The transmission m...

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Problems solved by technology

[0005] In addition, the current domestic OTDR indicators are far behind imported instruments, and the blind zone is generally greater than 10 meters, while the imported instruments are generally around 5 meters

The measurement distance basically does not exceed 100 kilometers, and if the saturation area of ​​the front end is large when measuring a long distance, that is to say, the actual dynamic range is far from meeting the requirements

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