Repetition rate performance for frequency mixing of four simultaneous QPSK signals based on a SOA-MZI photonic sampling mixer

Termos, Hassan; Mansour, Ali; Nasser, Abbass

doi:10.1117/1.oe.60.11.116104

Cited by 1 publication

(2 citation statements)

References 22 publications

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“…At substantial mixing frequencies, the ECG undergoes a notable decrease due to the dynamic conductance of the SOA-MZI [20]. Nevertheless, the amplification of electrical power at extreme mixing frequencies is influenced by the conventional modulation process and the increase in the OPC repetition rate, as presented in the following section [46]. Owing to the dynamic nature of the SOA-MZI, achieving parity between harmonic power and replica power becomes an important task.…”

Section: Electrical Conversion Gain Attributesmentioning

confidence: 99%

“…This leads to the accomplishment of terahertz replica generation at mixing frequencies of up to 10 f s + f IF ≈ 1 THz at the SOA-MZI output in both empirical and virtual investigations. The implementation of the experimental repetition rate principle has outstanding performance in terms of increasing the power and mitigating the noise [46]. To assess how well the system performs when operating at 1 THz, we measure the bit BER indicator [51] of the up-mixed field loading for two types of data modulations, which are QPSK and 4096quadrature amplitude modulation (QAM), as a function of the symbol rate; see Figure 9.…”

Section: Performance Of Terahertz Replicas Generationmentioning

confidence: 99%

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Terahertz Replica Generation of Ultra-High Data Rate Transmission in an Electro-Optical Semiconductor Optical Amplifier Mach–Zehnder Interferometer System

Termos,

Mansour

2024

Photonics

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This article presents an analysis of an electro-optical up-converter relying on a semiconductor optical amplifier Mach–Zehnder interferometer (SOA-MZI). The pulsed control signal is generated by an optical pulse clock (OPC) with a repetition rate of fs= 19.5 GHz. The intermediate frequency (IF) signal, which carries the modulation format known as quadratic phase shift keying (QPSK) at a frequency fIF, is shifted at the output of the SOA-MZI to high outlet mixing frequencies nfs±fIF, where n represents the harmonic order of the OPC. To examine the characteristics of the sampled QPSK signals, we employ the Virtual Photonics Inc. (VPI) emulator and evaluate them using significate metrics like error vector magnitudes (EVMs), conversion gains, and bit error rates (BERs). The up-mixing process is mainly achieved through the cross-phase modulation (XPM) effect in the SOA-MZI, which operates within a 195.5 GHz ultrahigh frequency (UHF). The electro-optical SOA-MZI up-converter demonstrates consistent uplifting conversion gains across the scope of the output mixing frequencies. The simulated conversion gain deteriorates from 38 dB at 20 GHz to 13 dB at 195.5 GHz. The operational efficiency of the electro-optical SOA-MZI design, employing the standard modulation approach, is also evaluated by measuring the EVM values. The EVM attains a 24% performance level at a data rate of 5 Gbit/s in conjunction with the UHF of 195.5 GHz. To corroborate our results, we compare them with real-world experiments conducted with the UHF of 59 GHz. The maximum frequency range of 1 THz is attained by increasing the OPC repetition rate. Ultimately, through elevating the control frequency to 100 GHz, the generation of terahertz replicas of the 4096-QAM (quadrature amplitude modulation) compound signal becomes achievable at heightened UHF, extending 1 THz, while maintaining a data transmission rate of 120 Gbit/s and upholding exceptional performance characteristics.

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Section: Electrical Conversion Gain Attributesmentioning

confidence: 99%

Section: Performance Of Terahertz Replicas Generationmentioning

confidence: 99%