Dynamic Range Improvement for an Analog Photonic Link Using an Integrated Electro-Optic Dual-Polarization Modulator

Zhu, Zihang; Zhao, Shanghong; Li, Xuan; Qu, Kun; Lin, Baoqin

doi:10.1109/jphot.2016.2547844

Cited by 14 publications

(6 citation statements)

References 17 publications

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“…Meanwhile, in [67], the previous technique could give 2 nd IMD suppression, but the 2 nd H remained constant. The 3 rd IMD in this study gives a better fundamental-RF-tothird-intermodulation ratio (FIR) of 20 dB than [65].…”

Section: Third Intermodulation Distortionmentioning

confidence: 81%

“…15. The third intermodulation is the most dominant effect on the RF signal [65]. The intermodulation distortion occurs in dual-tone RF frequencies, 𝑓 1 and 𝑓 2 .…”

Section: Third Intermodulation Distortionmentioning

confidence: 99%

“…This condition is better than [50] due to the RF output power difference of 70 dB from the 3 rd IMD. The techniques applied in [50] and, [65] gave the main RF output more power of 50 dB difference from 3 rd IMD. Meanwhile, in [67], the previous technique could give 2 nd IMD suppression, but the 2 nd H remained constant.…”

Section: Third Intermodulation Distortionmentioning

confidence: 99%

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Maximum RF Input Signal on the Electro-Optic Modulator Transmission Boundary Area for Harmonic Distortion Compensation in Analog Radio Over Fiber

2022

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In this study, we perform an analytical investigation of the electro-optic (EO), Mach-Zehnder modulator (MZM) transmission boundary area with a nonlinear model. We propose a nonlinear model that represents the allowable RF input amplitude within the MZM transmission boundary area. We investigate the maximum RF input amplitude and confine its harmonics using nonlinear model theory, RoF simulation, and MZM characteristic experiments. The maximum RF input amplitude in the MZM transmission boundary area is a convenient technique that can confine harmonics without an optical amplifier, optical filter, or other optical devices in RoF links. We select several RF input amplitudes within the MZM boundary area and account for harmonic distortion in the investigation. The RF input amplitude is 0.8 times of the EO modulator switching voltages. The boundary areas show that near the switching voltage value, the harmonics-to-main RF ratio (HMR) is less than 10%. Furthermore, the maximum RF inputs are still appropriate for QPSK modulation. We evaluate the nonlinear model of these modulation signals in terms of the error vector magnitude and constellation diagram. After considering the optical fiber impairment, thermal noise, and harmonics distortion in the nonlinear model with the modulation signal of QPSK, the ACLR and EVMs satisfy the 3GPP specification. The nonlinear models are appropriate for a small or medium sized of radioover-fiber links.

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Section: Third Intermodulation Distortionmentioning

confidence: 81%

“…15. The third intermodulation is the most dominant effect on the RF signal [65]. The intermodulation distortion occurs in dual-tone RF frequencies, 𝑓 1 and 𝑓 2 .…”

Section: Third Intermodulation Distortionmentioning

confidence: 99%

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Maximum RF Input Signal on the Electro-Optic Modulator Transmission Boundary Area for Harmonic Distortion Compensation in Analog Radio Over Fiber

2022

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“…SFDR follows from the IMD measurements [3,12,50,51,52]. These measurements are important for device characterization.…”

Section: Two-tone Testmentioning

confidence: 99%

“…Modulation is the process of imposing a signal, generally with information, onto another signal referred to as a carrier signal for transmission. Analog communication, although often not thought of as being advanced as digital communication, is prevalent in many applications including array antennas, satellite, radar, and RF communications [3]. The use of analog communication reduces bandwidth allocations for signals and is low cost when compared to digital communication [4].…”

Section: Introductionmentioning

confidence: 99%