包絡線信号抽出によるビットレート直接測定法の検討

概要

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We previously developed an optical sampling oscilloscope (EDT-OSO) based on an envelope detection triggering method. This EDT-OSO can stably measure eye-diagram waveforms of signals exceeding 100Gbps without an external high-frequency clock signal. However far-end waveform measurements during a long distance place could not be realized. Because the EDT-OSO requires to link 10-MHz time bases in the EDT-OSO and a light under test (LUT) generator for synchrinizing.To overcom this drawbak, we developed a direct bit-rate measureing method for synchronizing both 10-MHz time bases vartually and a self-synchronized EDT-OSO (SSEDT-OSO) based on this method simulteniously. We confirmed that a bit-rate measurement repetability of the SSEDT-OSO was from 10-9 to 10-8 by evaluating a standard deviation and the SSEDT-OSO could measure an eye-diagram without linking 10-MHz time bases.This paper explains the basic principle for measuring the bit-rate of the LUT directly. Furthermore, we describe a configuration of the SSEDT-OSO and evalluation results.
社団法人電気学会の論文
2008-11-01