Accuracy-Enhanced Wideband Optical Vector Network Analyzer Based on Double-Sideband Modulation

We report a method to significantly improve the accuracy of an optical vector network analyzer (OVNA) with double-sideband (DSB) modulation. The measurement errors of the DSB-OVNA mainly derive from optical carrier uncertainty and the beating between higher order optical sidebands. We propose a thre...

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Bibliographic Details
Published in:Journal of lightwave technology 2019-07, Vol.37 (13), p.2920-2926
Main Authors: Wen, Jun, Shi, Difei, Jia, Zhiyao, Shi, Zhan, Li, Ming, Zhu, Ning Hua, Li, Wei
Format: Article
Language:English
Subjects:
Accuracy
Adaptive optics
Algorithms
Amplitude modulation
Broadband
Double sideband transmission
Electrooptic modulation
instrumentation and measurement
Measurement errors
microwave photonics
Network analysers
Optical filters
Optical modulation
Optical polarization
Rangefinding
Sidebands
spectral analysis
system improvement
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Summary:We report a method to significantly improve the accuracy of an optical vector network analyzer (OVNA) with double-sideband (DSB) modulation. The measurement errors of the DSB-OVNA mainly derive from optical carrier uncertainty and the beating between higher order optical sidebands. We propose a three-step measurement method and an accuracy-enhanced algorithm to eliminate these measurement errors perfectly. A theoretical model is built to analyze the potential measurement errors as well as to find a way to remove them. Excellent accuracy improvement of the OVNA is confirmed by a proof-of-concept experiment. The OVNA shows an ultrahigh resolution of 667 kHz over a wideband measurement range of 80 GHz.
ISSN:0733-8724
1558-2213
DOI:10.1109/JLT.2019.2907548