Acta Optica Sinica, Volume. 39, Issue 11, 1104001(2019)
Linearization Analysis of Microwave Photonic Link Based on Balanced Detection
The bandwidth and spurious-free dynamic range (SFDR) of the microwave photonic link can be improved by suppressing the nonlinear distortion factor in the microwave photonic link. A linearization scheme based on double-electrode Mach-Zehnder modulator and balanced detection is proposed. This scheme combines phase control, optimized bias voltage, and balanced detection techniques. Theoretical analysis results show that the proposed system can eliminate second-order harmonic distortion(HD2), as well as suppress third-order inter-modulation distortion(IMD3) and fifth-order inter-modulation distortion(IMD5). Simulation analysis carried out on OptiSystem programming environment shows that the second-order inter-modulation distortion and HD2 are completely eliminated, and IMD3 and IMD5 are mainly suppressed under the background noise. Among them,the IMD3 is suppressed by about 45.76 dB, the third-order SFDR reaches 114 dB·Hz 2/3, and the fifth-order SFDR reaches 137.97 dB·Hz 4/5.
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Feng Zhao, Weitong Cai, Longlong Zhang, Yu Lu, Shenshen Wu. Linearization Analysis of Microwave Photonic Link Based on Balanced Detection[J]. Acta Optica Sinica, 2019, 39(11): 1104001
Category: Detectors
Received: Jun. 13, 2019
Accepted: Jul. 8, 2019
Published Online: Nov. 6, 2019
The Author Email: Zhao Feng (hfengzhao@126.com)