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Microwave Pulse Train Generation With Flexibly Controllable Interpulse Phase in Time-Delayed Coupled Broadband Optoelectronic Oscillator
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DOI：10.1109/TMTT.2025.3631010.png)
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Abstract
En 中文
High-coherent microwave pulse accumulation enables the significant enhancement of faint target detection capability. With the urban low-altitude economy burgeoning, pulse detection sources with long-term stability and flexibly encodable interpulse phase are effective in addressing increasingly complex electromagnetic environments. Optoelectronic oscillators (OEOs) are typical high-<inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$Q$ </tex-math></inline-formula> dissipative nonlinear resonant loops, which provide excellent testbeds for microwave temporal dissipative soliton (MTDS) generation with ultrashort pulse widths and ultrahigh coherence. Here, we propose a novel paradigm for achieving interpulse phase control of MTDSs in an externally excited time-delayed coupled OEO loop. Through employing amplitude-encoded sawtooth-wave pulses as the excitation signal, both synchronous and asynchronous pulsating of the MTDSs is achieved, enabling precise interpulse phase control in the nonlinear OEO loop. The simulation and experimental results reveal the approximately linear mapping relationship between the excitation amplitude difference and the interpulse phase with a tunable range over 0–<inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$2\pi $ </tex-math></inline-formula>. Significantly, the coherent accumulation results in excellent suppression ratios of the external interference signal, and the noise floor indicates the good coherence and phase stability of the generated pulses, which provides a robust solution for phase-programmable coherent microwave pulse generation in high-performance target detection.
Keywords:
Interpulse phase control
microwave temporal dissipative soliton (MTDS)
nonlinear transmission
optoelectronic oscillator (OEO)
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560
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3.5W
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