Actively mode-locked optoelectronic oscillator for microwave pulse generation

Wo, Jianghai; Zhang, Jin; Wang, Yalan

doi:10.1016/j.optlastec.2021.107563

Cited by 34 publications

(7 citation statements)

References 37 publications

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“…The OEO is able to produce the microwave signal with ultralow phase noise because it adopts a very long low-loss optical fiber delay line, which ensures that the resonant cavity has extremely high Q-factors. One of the most significant and promising technologies is the generation of ultra-pure single-mode microwave signals with the ultra-low phase noise, which is crucial for the high-precision radars and sensors [3,4].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear dynamics of the dual-loop optoelectronic oscillator based on polarization multiplexing.

Zhang

et al. 2023

Preprint

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We theoretically investigate the temporal dynamics of the dual-loop OEO based on polarisation multiplexing. The delay-differential equation (DDE) for this dual-loop OEO system is presented. The microwave envelope equation and its stationary solutions are derived. Then, the stability analysis on the stationary solutions is performed and the gain threshold under the different coupling coefficients when the bifurcation occurs is calculated. In addition, the variation of the output microwave amplitude as a function of the loop gain and coupling coefficient is studied. The experimental measurements confirmed the results obtained from the theoretical and numerical analysis.

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Section: Introductionmentioning

confidence: 99%

Nonlinear dynamics of the dual-loop optoelectronic oscillator based on polarization multiplexing.

Zhang

et al. 2023

Preprint

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“…The Fourier domain mode-locked OEO [22][23][24] has been proposed to generate a linearly frequency-modulated signal with a large time-bandwidth product, which can effectively alleviate the contradiction between the detecting range and the range resolution for radar. Further, a novel type of OEO based on the time-domain mode-locking [24][25][26][27][28][29] has been demonstrated to generate coherent pulse trains with short duration and variable repetition rates, which is beneficial for a pulsed Doppler radar to improve the velocity and range resolution. The so-called actively mode-locked OEO is realized by injecting an external signal with a low frequency that is the same as the free spectral range (FSR) of the OEO into the feedback loop.…”

Section: Introductionmentioning

confidence: 99%

Tunable Microwave Pulse Generation Based on an Actively Mode-Locked Optoelectronic Oscillator

Zhang¹,

Zhang

Zhang³

et al. 2022

Photonics

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A tunable microwave-pulse-generation scheme is proposed and demonstrated by employing an actively mode-locked optoelectronic oscillator (OEO) based on a microwave photonic filter (MPF). The MPF mainly consists of a phase-shifted fiber Bragg grating (PS-FBG) and a phase modulator. The microwave pulse trains with variable repetition rates are achieved by injecting an external signal, of which the frequencies are equal to an integer multiple of the free spectrum range (FSR) of the OEO. The multi-mode oscillation mechanism is discussed in detail theoretically and experimentally. A microwave pulse train with a central frequency of 9.25 GHz and repetition rate of 1.68 MHz is demonstrated by setting the injecting signal frequency to be the same with the FSR of the OEO. A tunable center frequency of the microwave pulses from 5.47 GHz to 18.91 GHz can be easily generated by tuning the laser frequency benefit from adopting the MPF. Furthermore, the microwave pulses with different pulse periods of 297.62 ns, 198.69 ns, and 148.81 ns are also realized by harmonic mode-locking. The proposed tunable microwave-pulse-generation method has potential applications in the pulse Doppler radar and communications.

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“…However, the time duration of the generated microwave pulse is fixed. A method to adjust the time duration of the microwave pulse is changing the order of the harmonic locking [15], but the repetition rate of the microwave pulse will be also changed.…”

Section: Introductionmentioning

confidence: 99%

Tunable Microwave Pulse Generation Based on a Time-Domain Mode Locked Optoelectronic Oscillator

et al. 2022

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A tunable microwave pulse generator is proposed and demonstrated. In this study, a time-domain mode locked optoelectronic oscillator (OEO) is realized by utilizing a dual-parallel Mach-Zehnder modulator (DPMZM). One branch of the DPMZM is modulated by the feedback signal and another branch is modulated by an inject signal. When the frequency of the injected signal is equal to an integer multiple of the oscillation mode space, the time-domain mode locking is achieved in the OEO loop and the microwave pulse trains are generated. In the experiment, the phase noise of the generated signal is -93 dBc/Hz, the frequency range of the generated signal is 6 -12 GHz, the time duration of the generated microwave pulse can be adjusted from 620 ns to 2970 ns, and the repetition rate of the generated microwave pulse can be set to 185.1 kHz, 370.2 kHz and 555.3 kHz.

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Actively mode-locked optoelectronic oscillator for microwave pulse generation

Cited by 34 publications

References 37 publications

Nonlinear dynamics of the dual-loop optoelectronic oscillator based on polarization multiplexing.

Nonlinear dynamics of the dual-loop optoelectronic oscillator based on polarization multiplexing.

Tunable Microwave Pulse Generation Based on an Actively Mode-Locked Optoelectronic Oscillator

Tunable Microwave Pulse Generation Based on a Time-Domain Mode Locked Optoelectronic Oscillator

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