Design of multifunctional instrument of insert loss and return loss measurement
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摘要: 为了快速精确测量光连接器件的插入损耗和回波损耗,在传统测量方法的基础上设计了一种新型的多功能差损回损测量仪。该测量仪系统由光路和电路两部分组成。光路部分利用光耦合器得到待测器件的损耗功率,经探测器接收并转换为电流;电流送到电路进行放大和A/D转换,并由单片机进行处理,测量结果由LCD显示输出。实验结果表明,该系统能够实时显示待测器件的差损和回损,达到0.05dB的精度。进一步测试结果表明,该测量系统可以达到70dB的高精度动态范围。Abstract: A new kind of insert loss and return loss measurement system was developed to improve the precision and speed of the measurement.The new system was made of optical unit and circuit unit.Optical couplers were used to get the loss power of optical connectors,and the power was transformed into electric current by detectors.The current was received and then amplified and transformed into digital signals by circuit unit.A single chip was used to calculate digital signals and output the result to the LCD.The experimental results show that the system is able to display the return loss and insert loss immediately with at the precision of 0.05dB.Further,the result indicates that the high precision measuring range can reach 70dB.
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Keywords:
- instrumentation measurement and metrology /
- return loss /
- insert loss /
- optical power
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