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- Title
Calibration-free and bias-drift-free microwave characterization of dual-drive Mach-Zehnder modulators using heterodyne mixing.
- Authors
Heng Wang; Shangjian Zhang; Xinhai Zou; Yali Zhang; Rongguo Lu; Zhiyao Zhang; Yong Liua
- Abstract
An electrical method is proposed for the microwave characterization of dual-drive Mach-Zehnder modulators based on heterodyne mixing. The proposed method utilizes the heterodyne products between the two-tone modulated optical sidebands and frequency-shifted optical carrier, and achieves calibration-free and bias-drift-free microwave measurement of dual-drive Mach-Zehnder modulators with high resolution electrical-domain techniques. Our method avoids the extra calibration for the photodetector and reduces half the bandwidth requirement for the photodetector and the electrical spectrum analyzer through carefully choosing a half frequency relationship of the two-tone modulation. Moreover, our measurement avoids the bias drifting problem due to the insensitivity to the bias phase of the modulator under test. The frequency-dependent modulation depths and half-wave voltages are measured for a commercial dual-drive Mach-Zehnder modulator with our method, which agree well with the results obtained by the conventional optical spectrum analysis method.
- Subjects
RADIO frequency; PHOTONICS research; FIBER optics; OPTICAL communications; HETERODYNE detection
- Publication
Optical Engineering, 2016, Vol 55, Issue 3, p1
- ISSN
0091-3286
- Publication type
Article
- DOI
10.1117/1.OE.55.3.031109