OFDM signal down frequency conversion based on a SOA-MZI sampling mixer using differential modulation and switching architectures

Termos, Hassan; Mansour, Ali

doi:10.1016/j.ijleo.2021.167761

Cited by 13 publications

(20 citation statements)

References 20 publications

(32 reference statements)

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“…It is crucial to notice that SOA-MZI low pass behavior degraded the mixed signal for about 35 dB at 158 GHz at any carrier frequency. However, the modulation principle played a significant role in amplifying the electrical power of the sampled signal compared to the switching principle [22,35]. This resulted in higher conversion gains.…”

Section: Conversion Gain Resultsmentioning

confidence: 99%

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Simultaneous Up-Conversion Based on a Co- & Counter-Directions SOA-MZI Sampling Mixer with Standard & Differential Modulation Modes

2022

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Simulation and experimental performance analyses of simultaneous up-converted signals, for the first time, were investigated utilizing a semiconductor optical amplifier Mach–Zehnder interferometer (SOA-MZI) sampling mixer in co- and counter-directions for standard and differential modulation modes. An optical pulse source at a sampling frequency of fs = 15.6 GHz was used as a sampling signal. The IF signal channels carrying quadrature phase shift keying (QPSK) data at frequencies fm were up-converted at different mixing frequencies up to 195.5 GHz. Using the Virtual Photonics Inc. (VPI) simulator, we realized mixed QPSK signals and studied their characteristics through a conversion gain and an error vector magnitude (EVM). Simulations of up mixing operated in a frequency range up to 158 GHz. For the standard modulation in the co-direction, the conversion gain decreased from 43.3 dB at the mixing frequency of 16.6 GHz to 21.8 dB at 157 GHz for the first channel and from 43 dB at 17.6 GHz to 21 dB at 158 GHz for the second channel. The use of the differential modulation principle improved the conversion gain by about 10 dB at 195.5 GHz compared to standard modulations in co- and counter-directions. The EVM reached, respectively, 15.5 and 17.5% for the differential modulation in both configurations, at the bit rate of 100 Gbit/s at 195.5 GHz. The benefit provided by the differential modulation was that EVM values were shifted by 20% for all channels in both configurations at 100 Gbit/s. In the real measurement, we confirmed that co-directional conversion exhibited a better performance than the counter-directional operation. In addition, the real mixed signal exhibited lower efficiency and quality in comparison with simulated signals due to the sensitivity of the receiver.

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Section: Conversion Gain Resultsmentioning

confidence: 99%

“…The architecture of the real SOA-MZI used in simulations by the VPI simulator is given in Figures 1 and 2, which is already proposed in our previously published work [34,35]. One SOA was located in each arm of the MZI.…”

Section: Principle Of Standard and Differential Modulation Modesmentioning

confidence: 99%

Simultaneous Up-Conversion Based on a Co- & Counter-Directions SOA-MZI Sampling Mixer with Standard & Differential Modulation Modes

2022

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“…It is worth noting that the only difference between this work and that in Ref. 16 is that the sampling signal and the data signal are exchangeable signals. In other words, the sampling signal is injected at the MP of the SOA-MZI while the data signal is entered into the CP of the SOA-MZI.…”

Section: Frequency Mixing Simulation Setupmentioning

confidence: 94%

“…After that, the EVM values are calculated from the measured BER. Since the sampled signal follows the harmonics of the sampling signal where its harmonics power slightly decreases at the SOA-MZI output due to the wavelength of the optical filter that is equal to the wavelength of the sampling signal, 16 the performance of the mixing system is enhanced sufficiently. It is worth noting that the only difference between this work and that in Ref.…”

Section: Frequency Mixing Simulation Setupmentioning

confidence: 99%

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

2021

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“…Semiconductor optical amplifiers (SOAs) rely on their nonlinearity such as cross-gain modulation (XGM) [10] and XPM [11][12][13][14][15][16][17][18][19][20] can also be used for shifting at the same time in the layout of a detached apparatus or implemented in an interferometric structure such as an SOA-Mach-Zehnder Interferometer (SOA-MZI). SOA-MZIs can achieve good performance, such as a frequency range up to 100 GHz [19].…”

Section: Introductionmentioning

confidence: 99%

Frequency Alteration Built on an Electro-Optical Sampling SOA–MZI Using a Differential Modulation Schema

Termos

Mansour

2022

Optics

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In this paper, we present a real and simulated study of a frequency up mixing employing an electro-optical sampling semiconductor optical amplifier Mach–Zehnder interferometer (SOA–MZI) along with the differential modulation schema. The sampling signal is generated by an optical pulse clock (OPC) at a frequency of fs= 19.5 GHz. The quadratic phase shift keying (QPSK) signal at an intermediate frequency (IF) fIF is shifted to high frequencies nfs ± fIF at the SOA–MZI output. Using a simulator entitled Virtual Photonics Inc. (VPI), we generate sampled QPSK signals and analyze their merits during conversion gains and error vector magnitudes (EVMs). We conducted simulations of mixing in the SOA–MZI operating in a high-frequency band up to 195.5 GHz. The positive conversion gain is accomplished over the mixing frequencies. The EVM is used to evaluate the performance of the electro-optical sampling up-convertor. The EVM reaches 14% at a data rate of 5 Gbit/s at 195.5 GHz. During the experimental work, the results obtained in simulations are set side by side with the factual ones in the frequency range up to 59 GHz. Thus, the comparison between them confirms that they have approximately the same performance.

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OFDM signal down frequency conversion based on a SOA-MZI sampling mixer using differential modulation and switching architectures

Cited by 13 publications

References 20 publications

Simultaneous Up-Conversion Based on a Co- & Counter-Directions SOA-MZI Sampling Mixer with Standard & Differential Modulation Modes

Simultaneous Up-Conversion Based on a Co- & Counter-Directions SOA-MZI Sampling Mixer with Standard & Differential Modulation Modes

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

Frequency Alteration Built on an Electro-Optical Sampling SOA–MZI Using a Differential Modulation Schema

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