Ultrahigh-linearity dual-drive scheme using a single silicon modulator

Here, a high-linearity dual-drive scheme using a single silicon dual-drive Mach-Zehnder modulator is presented. The bias voltages and RF amplitudes of the two driving arms are adjusted such that the nonlinearity of the transfer function of the Mach-Zehnder interferometer cancels out the nonlinear re...

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Bibliographic Details
Published in:Optics letters 2023-06, Vol.48 (11), p.2995-2998
Main Authors: Yue, Hengsong, Chen, Kaizhong, Chu, Tao
Format: Article
Language:English
Subjects:
Intermodulation distortion
Linearity
Mach-Zehnder interferometers
Microwave photonics
Modulators
Nonlinear response
Nonlinearity
Silicon
Transfer functions
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Summary:Here, a high-linearity dual-drive scheme using a single silicon dual-drive Mach-Zehnder modulator is presented. The bias voltages and RF amplitudes of the two driving arms are adjusted such that the nonlinearity of the transfer function of the Mach-Zehnder interferometer cancels out the nonlinear response of the arms. Using the proposed scheme, the spurious-free dynamic range of the third-order intermodulation distortion is 123.4 dB Hz , which is believed to be a record-breaking value for silicon modulators. In comparison, the result obtained using a conventional single-drive scheme is 102.6 dB·Hz . The proposed scheme could simplify the design of modulators and promote high-performance microwave photonic links.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.492756