Photonic Generation of Triangular-Shaped Waveform With Tunable Symmetry Factor Based on Two Single-Drive Mach-Zehnder Modulator

Wang, Chuangye; Ning, Tigang; Li, Jing; Pei, Li; Jiao, Z.; Wu, Beilei; Dong, Xinyong

doi:10.1109/jphot.2020.3030683

Cited by 5 publications

(4 citation statements)

References 20 publications

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“… – 13 The most commonly used method at present is external modulation 14 – 19 Because external modulation allows signal generation within a lower radio frequency range and enables modulation of frequency, phase, and amplitude through an external modulator, it is possible to generate various waveforms using external modulation. Reference 13 using a spectrum shaper and performing frequency-to-time mapping through dispersive optical fibers results in the generation of periodic triangular pulses.…”

Section: Introductionmentioning

confidence: 99%

“…This scheme generates versatile waveforms including short pulse, trapezoidal, triangular, and sawtooth waveforms but still focuses on the generation of symmetric waveforms and cannot achieve the generation of asymmetric waveforms. Reference 18 directly utilizes an RF signal to drive an SD-MZM to obtain a tunable symmetric triangular waveform. The scheme includes only one SD-MZM.…”

Section: Introductionmentioning

confidence: 99%

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Periodic asymmetric function waveform generator based on polarization multiplexing modulator

Wang,

Li,

Yan

et al. 2024

Opt. Eng.

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An asymmetric waveform signal generation scheme based on dual polarization multiplexing-quadrature phase shift keying (PM-QPSK) modulator is proposed and analyzed. The key technique to generate periodic asymmetrical function waveform is how to control the amplitude and phase of the Fourier series of the target waveform simultaneously. In order to achieve this function in this proposal, a continuous-wave laser is modulated by radio-frequency signals with various phases, using a PM-QPSK modulator. The orthogonal sine and cosine harmonic signals are output through a polarization beam combiner. A polarizer is then employed to balance the power of these two orthogonal signals. By properly adjusting the variables, both the amplitude and phase of the Fourier series of the target waveform can be simultaneously set. When the root mean square error is <5%, a half duty cycle ramp wave signal with adjustable slope (20% ≤ δ ≤ 80%) can be obtained. In addition, the influence of variable drift on the target waveform is analyzed in detail.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Periodic asymmetric function waveform generator based on polarization multiplexing modulator

Wang,

Li,

Yan

et al. 2024

Opt. Eng.

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“…In Ref. [17], a waveform with variable symmetry is generated by modulating two Mach-Zehnder modulators (MZM) with appropriate input signals. In Ref.…”

Section: Introductionmentioning

confidence: 99%

Tuneable Photonic Microwave Waveforms Generation Based on a Dual-Loop Optoelectronic Oscillator

Hu,

Zhang,

et al. 2024

IEEE Photonics J.

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A novel scheme for generating full-duty-cycle triangular and square pulses based on an optoelectronic oscillator (OEO) is proposed and experimentally demonstrated. The scheme can generate a tuneable fundamental tone corresponding to the repetition rate of the pulses without any external radio frequency source. The "Vernier effect" is realised using two chirped fibre Bragg gratings, which can effectively improve the side-mode suppression ratio. The oscillation frequency is tuned from 2.5 to 6 GHz in an experiment to verify the theory, and the phase noise of the generated fundamental tone is measured to be −115 dBc/Hz at an offset frequency of 10 kHz. By appropriately setting the gain of the OEO loop, the power of the first-and third-order harmonics can be adjusted to meet the required power ratio. Periodical triangular pulses with repetition rates of 5GHz, 6GHz and square pulses with repetition rates of 2.5GHz, 5GHz were successfully generated. The rootmean-square errors are measured as 0.026 and 0.083 at a repetition rate of 5 GHz.

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“…Normally, extra techniques are required to manipulate the phase and power weights of each harmonic. The proposed asymmetric triangular-shaped waveform generation schemes include the method based on a push-pull MZM with a tunable ODL [14], the scheme using parallel MZM arrays with four tunable phase shifters (PS) [15], the scheme based on parallel MZMs working on different polarization states [16], and the scheme using an integrated I/Q (I: in-phase, Q: quadrature phase) modulator with a tunable PS [17]. All above schemes claimed that the symmetry-tunable full-duty triangular-shaped waveforms can be generated by the modulator arrays with the help of the tunable ODL, polarization controlling or the tunable RF PS.…”

Section: Introductionmentioning

confidence: 99%

Symmetry-Tunable Full-Duty Triangular-Shaped Waveform Generation Using a Simple Single-Drive Mach-Zehnder Modulator

Yang

Chi

et al. 2023

IEEE Photonics J.

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A novel and simple photonic approach for generating symmetry-tunable full-duty triangular-shaped microwave waveforms is proposed and experimentally demonstrated. In this approach, a simple commercial single-drive Mach-Zehnder modulator (MZM) is adopted and driven by the radio frequency (RF) input. By properly presetting the RF modulation index and simply adjusting the direct current (DC) bias voltage of MZM, the full-duty triangular-shaped microwave waveforms with selfdefined symmetrical coefficients can be obtained. A complete theoretical analysis on operation principle is presented and a proof-of-concept experiment is carried out. The full-duty triangular-shaped waveforms with tunable symmetrical coefficients at the repetition rate of 5 GHz are successfully generated. This approach features simple architecture, less variables, excellent reconfigurability and integrable capability, which are highly desired for the high-performance triangularshaped waveform generator.

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Photonic Generation of Triangular-Shaped Waveform With Tunable Symmetry Factor Based on Two Single-Drive Mach-Zehnder Modulator

Cited by 5 publications

References 20 publications

Periodic asymmetric function waveform generator based on polarization multiplexing modulator

Periodic asymmetric function waveform generator based on polarization multiplexing modulator

Tuneable Photonic Microwave Waveforms Generation Based on a Dual-Loop Optoelectronic Oscillator

Symmetry-Tunable Full-Duty Triangular-Shaped Waveform Generation Using a Simple Single-Drive Mach-Zehnder Modulator

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