Laser & Optoelectronics Progress, Volume. 59, Issue 17, 1713002(2022)
Broadband Linearization of Microwave Photonic Link Based on Single-Drive Dual-Parallel Mach-Zehnder Modulator
This study proposes a broadband linearization scheme based on a single-drive dual-parallel Mach-Zehnder modulator (SD-DPMZM) to improve the spurious-free dynamic range (SFDR) of microwave photonic link in broadband transmission. The third-order intermodulation distortion (IMD3) is theoretically eliminated using an 180° hybrid, thereby optimizing the biases of the dual-parallel Mach-Zehnder modulator. The simulated results show that IMD3 is completely suppressed when the input signal had two tones. An IMD3 suppression and SFDR improvement of 68 dB and 14.5 dB, respectively, are generated when SD-DPMZM is driven by two radio frequency tones of 10 and 10.01 GHz. Furthermore, results show that SFDR can remain above 114.3 dB·Hz2/3 when the signal is changed from the X-band to K-band.
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Huanjian Deng, Shangyuan Li, Shiming Yang, Qiang Liu, Minming Geng. Broadband Linearization of Microwave Photonic Link Based on Single-Drive Dual-Parallel Mach-Zehnder Modulator[J]. Laser & Optoelectronics Progress, 2022, 59(17): 1713002
Category: Integrated Optics
Received: Dec. 13, 2021
Accepted: Dec. 24, 2021
Published Online: Aug. 25, 2022
The Author Email: Liu Qiang (q.liu@gxu.edu.cn)