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A Linear Microwave Electro-Optic Front End With SiGe Distributed Amplifiers and Segmented Silicon Photonic Mach–Zehnder Modulator.
- Source :
-
IEEE Transactions on Microwave Theory & Techniques . Dec2019, Vol. 67 Issue 12, p5446-5458. 13p. - Publication Year :
- 2019
-
Abstract
- The dynamic range of a radio-over-fiber (RoF) link is fundamentally limited by the linearity of electro-optic modulators. Silicon photonic (SiP) processes offer significant potential for integration, but the plasma dispersion effect impacts the realizable spur-free dynamic range (SFDR). This article analyzes the underlying source of nonlinearity in SiP Mach–Zehnder modulator (MZM) and demonstrates fundamental limitations on intermodulation distortion. A SiGe low-noise distributed driver is co-designed for the SiP MZM to linearize and extend the bandwidth over which the SFDR remains high. The RoF transmitter achieves 1–20 GHz bandwidth and an SFDR of 109 dB $\cdot $ Hz2/3 at 11 GHz. To the best of our knowledge, this is the highest SFDR demonstrated for a SiP technology without incorporating predistortion. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00189480
- Volume :
- 67
- Issue :
- 12
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Microwave Theory & Techniques
- Publication Type :
- Academic Journal
- Accession number :
- 141083486
- Full Text :
- https://doi.org/10.1109/TMTT.2019.2941204