Versatile photonic microwave waveforms generation using a dual-parallel Mach–Zehnder modulator without other dispersive elements

Bai, Guangfu; Lin, Hai–Qing; Jiang, Yang; Tian, Jing; Zi, Yuejiao; Wu, Ting-Wei; Huang, Fengqin

doi:10.1016/j.optcom.2017.03.050

Cited by 15 publications

(5 citation statements)

References 23 publications

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“…5c), see the photonic filter with the delay line at 0.5 ns. The power ratio between the first and third harmonics is 19.4 dB, which is close to the theoretical value of 19.08 dB [14]; this difference is due to the band-width of the notch filter. We generate the triangular waveform by suppressing the second harmonic with the notch filter at 200 MHz as the center frequency and a 50 MHz bandwidth and a 40 dB extinction rate, as seen in Fig.…”

Section: Resultssupporting

confidence: 81%

Generation of triangular waveform radiofrequency signals based on photonic filtering using a broad-spectrum source

Muraoka¹,

Arvizu

Sanchez-Lopez³

et al. 2022

Rev. Mex. Fís.

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This work proposes a photonic method to generate optical pulses with a triangular wave shape using a low coherence source. We modulate this source using a sinusoidal radio frequency signal as a local oscillator. We eliminate the second harmonic of the spectral components generated by the modulation process tuning a reject filter to get a triangular wave. We implement the filter using an interferometer with a delay line in one of their branches. To tune the filter, the only adjustment required is over the optical delay line. We developed our scheme in a simulation environment but based on the use of optical and optoelectronic elements with parameters of commercial devices, some of them available in our laboratory. We generate triangular waveform signals with pulse frequencies of 100, 150, 250, and 300 MHz as proof of concept. The proposed scheme has the advantage of being low cost and easy to use because it does not require bias control nor adjustment to Vpi voltage. Usually, other authors must vary these parameters to get the desired electrical signal. Still, we generate the triangular waveform by adjusting only the local oscillator frequency and the optical delay line. Therefore, because we use a broad-spectrum optical source and do not require a strictly controlled variable voltage, our system will be cheaper.

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Section: Resultssupporting

confidence: 81%

Generation of triangular waveform radiofrequency signals based on photonic filtering using a broad-spectrum source

Muraoka¹,

Arvizu

Sanchez-Lopez³

et al. 2022

Rev. Mex. Fís.

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“…Recently, researchers have proposed a variety of methods for generating photonic microwave waveforms based on external modulators. In Ref [4], variable photonic microwave waveforms generation is achieved by controlling the radio frequency (RF) signals and direct current (DC) bias voltages of dual-parallel Mach-Zehnder modulator (DPMZM). This method does not require dispersive components and photonic filtering.…”

Section: Introductionmentioning

confidence: 99%

“…External modulators require continuous wave (CW) lasers to generate optical carriers. The DC bias drift of the MZM modulators can result in undesired waveforms [4], [5], [6], [7], [8], [9]. In Ref [4], [5], [9], the schemes are polarization-dependent, which will reduce the stability of the system.…”

Section: Introductionmentioning

confidence: 99%

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Optical Microwave Waveforms Generation Based on the Round-Trip Phase of the DFB Laser

et al. 2023

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In this paper, we theoretically and experimentally analyze the influence of the round-trip phase of distributed feedback (DFB) lasers on the harmonic-phase of photocurrent, caused by the external injection current. The results indicate that the harmonicphase of photocurrent introduced by the round-trip phase (HPIRP) reduces with the increase of modulation depth at a fixed frequency. Then, based on the HPIRP of the DFB laser, a simple photonic generation method of optical microwave waveforms is proposed and verified. In this scheme, three lasers with different wavelengths are mainly used. By adjusting the tunable optical delay lines and attenuators, the amplitude and phase of the photocurrent of the three branches converted by the photodetector (PD) can be controlled individually. The photocurrent of the superposition of the three branches can be controlled properly to form the target waveform. Dispersive elements and complex microwave photonic filtering are not required. Through experiments, rectangular and triangular waveforms with a repetition frequency of 3.75 GHz are generated.

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“…To conveniently and accurately obtain the required frequency components, the technique of external modulation is a good choice because the amplitude and phase of each modulation tone can be strictly controlled [6]- [11]. By this means, there are many successful demonstrations of triangular, sawtooth or rectangular waveforms generation, in which the cascaded singledrive Mach-Zehnder modulator (MZM), dual-drive MZM or dual-parallel MZM are employed [12]- [14]. Even so, such schemes do not come up to expectations.…”

Section: Introductionmentioning

confidence: 99%

Flexible Microwave Waveforms Synthesis Based on Wavelength Sensitive Bias Shift of a Mach–Zehnder Modulator

Lan

Jiang

et al. 2022

IEEE Photonics J.

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A new scheme of arbitrary microwave waveform generation based on one single-drive Mach-Zehnder modulator (MZM) is proposed. Due to the characteristic of the wavelengthdependent bias shift in a MZM, two light fields with different wavelength can carry two sets of modulation components and contribute the desired waveforms through both of the Fourier synthesis and time-domain synthesis. Thanks to plentiful and controllable harmonics generation, some challenging waveforms generation, such as parabolic waveform, sawtooth waveform and frequency doubling triangular waveform, can be achieved, which are verified by the theoretical analysis and experimental results. This method exhibits not only more flexible waveform generation ability, but also the advantages of simple configuration, easy operation and high efficiency of bandwidth utilization.

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Versatile photonic microwave waveforms generation using a dual-parallel Mach–Zehnder modulator without other dispersive elements

Cited by 15 publications

References 23 publications

Generation of triangular waveform radiofrequency signals based on photonic filtering using a broad-spectrum source

Generation of triangular waveform radiofrequency signals based on photonic filtering using a broad-spectrum source

Optical Microwave Waveforms Generation Based on the Round-Trip Phase of the DFB Laser

Flexible Microwave Waveforms Synthesis Based on Wavelength Sensitive Bias Shift of a Mach–Zehnder Modulator

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