Design of multifunctional instrument of insert loss and return loss measurement
-
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.
-
Keywords:
- instrumentation measurement and metrology /
- return loss /
- insert loss /
- optical power
-
-
[1] COLLINS J V,CLIFT D J.Return loss measurements of lensed fibre to demiconductor laser[J].Electron Lett,1992,28(14):1313～1314.
[2] VINCENT C Y S,JIANG J W,CARGILL J A et al.Automation of an optical time domain reflectometer to measure loss and return loss[J].IEEE Journal of Lightwave Technology,1990,8(7):1078～1083.
[3] KIHARA M,NAGASAWA S,TANIFUJI T.Return loss characteristics of optical fiber connectors[J].IEEE Journal of Lightwave Technology,1996,14(9):1986～1991.
[4] NOUTSIOS P C.Optical return loss measurements and simulation of an arbitrary array of concatenated reflective elements on field-installed optical links[J].IEEE Jouranl of Lightwave Technology,2006,24(4):1697～1702.
[5] HUANG H P,ZHU N H,HASEN Q Q G et al.Small-signal power measuring technique for measuring the frequency response of electroabsorption modulators[J].IEEE Photonics Technology Letters,2006,18(23):2451～2453.
[6] JENTZSCH A,HEINRICH W G.Theory and measurements of flip-chip interconnects for frequencies up to 100 GHz[J].IEEE Transactions on Microwave Theory and Techniques,2001,49(5):871～878.
[7] XU F,GAO G H,CHEN Z L et al.Development of an automatic laser power measurement apparatus[J].Laser Technology,2000,24(2):107～109(in Chinese).
[8] TSAI Z M,SUN K J,VENDELIN G D et al.A new feedback method for power amplifier with unilateralization and improved output return loss[J].IEEE Transactions on Microwave Theory and Techniques,2006,54(4):1590～1597.
[9] BROWN R A,ENSAF P,MARSHALL T et al.Printed microwave couplers with thermal isolation[J].IEEE MTT-S International,Microwave Symposium Digest,1997,2(2):983～986.
[10] SEFLER G A,PEPELJUGOSKI P K.Interferometric noise penalty in 10-Gbit/s ethernet LAN links[J].IEEE Photonics Technology Letters,2002,14(1):113～115.
计量
- 文章访问数: 3
- HTML全文浏览量: 0
- PDF下载量: 5
下载: