Breaking the limitation of mode building time in an optoelectronic oscillator.
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TLDR
A new scheme to generate a large chirp-rate LCMW based on Fourier domain mode locking technique to break the limitation of mode building time in an OEO and enable fast-tunable chirP production for microwave photonics is proposed.Abstract:
An optoelectronic oscillator (OEO) is a microwave photonic system with a positive feedback loop used to create microwave oscillation with ultra-low phase noise thanks to the employment of a high-quality-factor energy storage element, such as a fiber delay line. For many applications, a frequency-tunable microwave signal or waveform, such as a linearly chirped microwave waveform (LCMW), is also needed. Due to the long characteristic time constant required for building up stable oscillation at an oscillation mode, it is impossible to generate an LCMW with a large chirp rate using a conventional frequency-tunable OEO. In this study, we propose and demonstrate a new scheme to generate a large chirp-rate LCMW based on Fourier domain mode locking technique to break the limitation of mode building time in an OEO. An LCMW with a high chirp rate of 0.34 GHz/μs and a large time-bandwidth product of 166,650 is demonstrated.read more
Citations
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Optoelectronic oscillators with time-delayed feedback
TL;DR: In this article, the authors provide a comprehensive survey of time-delayed optoelectronic oscillators, outlining the latest achievements, and discuss the main challenges ahead, as well as a review of the current state of the art in this field.
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Recent advances in optoelectronic oscillators
Tengfei Hao,Yanzhong Liu,Jian Tang,Qizhuang Cen,Wei Li,Ninghua Zhu,Yitang Dai,José Capmany,Jianping Yao,Ming Li +9 more
TL;DR: Recently, new mode control and selection methods based on Fourier domain mode-locking and parity-time symmetry have been proposed and experimentally demonstrated in OEOs, which overcomes the long-existing mode building time and mode selection problems in a traditional OEO.
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Dual-chirp Fourier domain mode-locked optoelectronic oscillator
TL;DR: Tunable dual-chirp microwave waveforms with a large time-bandwidth product are generated directly from the FDML OEO cavity in the experiment, which can be used in modern radar systems to improve its range-Doppler resolution.
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Hybrid Fourier-domain mode-locked laser for ultra-wideband linearly chirped microwave waveform generation.
TL;DR: The generation of a tunable linearly chirped microwave waveform (LCMW) with an ultra-large time-bandwidth product (TBWP) based on a hybrid Fourier-domain mode-locked (FDML) laser that is fully tunable in terms of bandwidth, temporal duration, chirp rate, and center frequency.
References
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