12 January 2018 Two-tone spectrum analysis for self-referenced characterization of high-speed phase modulators
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Abstract
A two-tone spectrum analysis method is proposed for self-referenced microwave characterization of high-speed electro-optic phase modulators (PMs) based on the frequency-shifted heterodyning. The method avoids correcting the roll-off responsivity of photodetection and alleviates the bandwidth requirements of the high-speed photodetector and the electrical spectrum analyzer. Moreover, it achieves very high frequency resolution and high stability measurement by the use of the two-tone frequency-shifted heterodyning.
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Heng Wang, Xinhai Zou, Mengke Wang, Shangjian Zhang, Yong Liu, "Two-tone spectrum analysis for self-referenced characterization of high-speed phase modulators", Proc. SPIE 10621, 2017 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems, 106210M (12 January 2018); doi: 10.1117/12.2295659; https://doi.org/10.1117/12.2295659
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