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• W3047643906 endingPage "6577" @default.
• W3047643906 startingPage "6569" @default.
• W3047643906 abstract "Mode selection is crucial for a stable single-mode oscillation of an optoelectronic oscillator (OEO). In this article a parity-time (PT)-symmetric frequency-tunable OEO is proposed and experimentally demonstrated, to realize the precise frequency tuning without using any narrowband filter. The proposed PT-symmetric OEO is implemented based on two identical optoelectronic hybrid loops mainly consisting of a shared dual-parallel Mach-Zehnder modulator (DPMZM) and a photodetector. The PT-symmetry condition can be achieved by enabling antisymmetric gain/loss in the two loops through manipulating the bias voltages of the two child-MZMs of DPMZM, and continuous frequency tunability is realized by adjusting the bias voltage of the parent-MZM. A theoretical model is developed for the proposed PT-symmetric OEO to analyze the dynamics of the PT-supermodes as the gain/loss coefficient changing. Furthermore, an experiment is performed. Without high-Q filter, stable single-mode oscillation of the PT-broken supermode at 4.2 GHz with side-mode suppression ratios of 60 and 50 dB is demonstrated in the OEO with 6 and 2000 m fiber loop lengths, respectively. The frequency tuning ranges are 1.4 MHz and 1.5 kHz for two OEOs with different fiber loop lengths." @default.
• W3047643906 created "2020-08-13" @default.
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• W3047643906 date "2020-12-01" @default.
• W3047643906 modified "2023-10-16" @default.
• W3047643906 title "A Precisely Frequency-Tunable Parity-Time-Symmetric Optoelectronic Oscillator" @default.
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• W3047643906 doi "https://doi.org/10.1109/jlt.2020.3014265" @default.
• W3047643906 hasPublicationYear "2020" @default.
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