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- 实验方案
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[IEEE 2019 International Workshop on Fiber Optics in Access Networks (FOAN) - Sarajevo, Bosnia and Herzegovina (2019.9.2-2019.9.4)] 2019 International Workshop on Fiber Optics in Access Networks (FOAN) - An Affordable Laboratory Photodiode up to 11.5 GHz for Microwave Photonics Experiments
摘要： Low-cost optoelectronic devices are the main limiting factor when it comes to scaling the current access networks based on microwave photonics to the capabilities of smart cities. The use of affordable photodiodes could decrease the use of microwave photonics, since it is part of each system. In this paper we evaluate the frequency response of a coaxial packaged photodiode. The design of an electric circuit is presented. The results from the vector network analyzer show that the coaxial packaged photodiode makes photodetectors applicable up to 11.5 GHz. In addition, an experimental verification of the photodiode in an optoelectronic oscillator is performed.
关键词： photodetector,optoelectronic oscillator,photodiode,microwave photonics
更新于2025-09-23 15:21:01
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[IEEE IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society - Lisbon, Portugal (2019.10.14-2019.10.17)] IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society - Fast Model-Based Fault Detection in Single-Phase Photovoltaic Systems
摘要： Besides distinct signal generation, optoelectronic oscillators (OEOs) have also been rapidly developed as emerging techniques towards sensing, measurement, and detection. In this paper, we start with the conceptual architecture and the analytical model of OEOs. Then, three operation principles behind sensing, measurement, and detection applications are categorized, including the variation on the time delay of loop, the passband reconfiguration of microwave photonic filter in loop, and the oscillation gain from injection locking, which clearly clarify the X-to-frequency mapping (X denotes target parameter or signal) for supporting practical solutions and approaches. Next, a comprehensive review to advances in OEO-based sensing, measurement, and detection applications is presented, including length change and distance measurement, refractive index estimation, load and strain sensing, temperature and acoustic sensing, optical clock recovery, and low-power RF signal detection. As a new application example, a novel approach for in-line position finding is proposed. When a long fiber Bragg grating inserted into OEO is locally heated to slightly broaden its reflection spectrum, the target position heated is mapped into the oscillating frequency shift, according to the first operation principle. A sensitivity of 254.66 kHz/cm is obtained for position finding in the experiment. Afterward, solutions for calibration and stabilization are briefly introduced, which enable us to improve the accuracy and reliability. Finally, features and future prospects on the sensing, measurement, and detection applications are discussed, such as compact and integrated OEOs.
关键词： Optoelectronic oscillator (OEO),fiber Bragg grating,detection,measurement,oscillating frequency,sensing and sensor,position finding,photonic integrated circuits (PICs)
更新于2025-09-23 15:19:57
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[IEEE 2019 International Topical Meeting on Microwave Photonics (MWP) - Ottawa, ON, Canada (2019.10.7-2019.10.10)] 2019 International Topical Meeting on Microwave Photonics (MWP) - Widely Tunable Parity-Time-Symmetric Optoelectronic Oscillator Based on a Silicon Microdisk Resonator
摘要： A widely frequency-tunable parity-time (PT)-symmetric optoelectronic oscillator (OEO) based on a silicon microdisk resonator (MDR) is proposed and experimentally demonstrated. In the proposed OEO, two mutually coupled optoelectronic loops having an identical geometry with one having a gain and the other a loss, which are equal in magnitude, light implemented by employing the reciprocity of are propagation in an MDR, to form a PT-symmetric OEO. Thanks to the PT symmetry, single-frequency oscillation with low phase noise is implemented. The tuning of the frequency is realized by thermally tuning the MDR. The proposed OEO is demonstrated experimentally. A wide frequency tunable range from 2 to 12 GHz is realized. The phase noise is measured to be -105 dBc/Hz at a 10 kHz frequency offset, which can be further reduced if the loop length is increased.
关键词： Silicon photonics,Optoelectronic oscillator (OEO),Parity-time symmetric,Microwave photonic bandpass filter,Microwave photonics,microdisk resonator
更新于2025-09-16 10:30:52
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[IEEE 2019 International Topical Meeting on Microwave Photonics (MWP) - Ottawa, ON, Canada (2019.10.7-2019.10.10)] 2019 International Topical Meeting on Microwave Photonics (MWP) - Microwave Photonic Based 1/n Frequency Divider
摘要： A new microwave photonic frequency divider is presented. It is capable of generating a microwave frequency component with a frequency of 1/n times the input microwave signal frequency. The 1/n frequency divider is implemented based on an optoelectronic oscillator consisting mainly of a dual-parallel Mach Zehnder modulator for microwave signal modulation and an optical filter for sideband suppression. Experimental results are presented which demonstrate 1/2 and 1/3 frequency component generation. The phase noise measurements show that the 1/2 and 1/3 frequency components have improved phase noise performance by 6 and 9 dB, respectively.
关键词： microwave photonics,optoelectronic oscillator,frequency division
更新于2025-09-12 10:27:22
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Fine tunable PT-symmetric optoelectronic oscillator based on laser wavelength tuning
摘要： A fine tunable parity-time symmetric optoelectronic oscillator (PT-OEO) based on laser wavelength tuning is proposed and experimentally demonstrated. In the PT-OEO, an intensity modulator (IM) and a dispersion compensating fiber (DCF) are merged into the loop. Tuning the laser wavelength leads to a reconfigurable dispersion-induced power fading, serving as rough tunable oscillation mode selection. Meanwhile, to implement a fine-mode selection, parity-time symmetry breaking is introduced. Consequently, a fine tunable PT-OEO is achieved without using a high quality-factor (Q-factor) electrical filter. Experiment shows that the frequency of the generated signal can be tuned from 20.34 to 19.49 GHz with a step of 203 MHz, when the laser wavelength is manipulated from 1545 to 1565 nm. The phase noise is evaluated as -116.1 dBc/Hz @ 10-kHz offset frequency.
关键词： optoelectronic oscillator,Dispersion-induced power fading,parity-time symmetry
更新于2025-09-11 14:15:04
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Tunable optoelectronic oscillator working in the Ku band
摘要： An improved tunable optoelectronic oscillator (OEO) based on a dual-parallel Mach–Zehnder (MZ) modulator embedded with a sub-MZ modulator is designed and experimentally demonstrated for Ku band applications. Single-mode oscillator operation is achieved with a single feedback loop and without any electrical filters, which improves the tunability of the proposed OEO. The microwave power expression at the output of photodetector is developed using the well-known Taylor series expansion method to calculate the electrical spectrum and accumulated dispersion (ps nm?1) of the dispersive element (linearly chirped fiber Bragg grating). Phase noise is also examined, which allows us to conclude that our proposed oscillator is suitable for optical wireless communication, radar and phase array antenna applications. Furthermore, its application as a strain and temperature sensor is investigated and it is found to have maximum strain sensitivity (Kε) of 58.75 MHz με?1 and temperature sensitivity (KT) of 1.752 GHz °C?1.
关键词： optoelectronic oscillator,fiber Bragg gratings,microwave generation,phase noise,photonic sensor
更新于2025-09-10 09:29:36
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Remote Optical Frequency Up-converter based on Optoelectronic Oscillator
摘要： A remote optical frequency up-converter utilizing an electro-absorption modulator based optoelectronic oscillator (EAM-OEO) for radio-over-fiber (RoF) application is proposed and experimentally demonstrated. The proposed remote optical frequency up-converter has no data leakage from optical baseband signal and no phase noise degradation stemming from optical baseband data leakage because the optical baseband signal is optically isolated from the OEO feedback loop by an optical band pass filter. Compared with the conventional remote optical frequency up-converter based on an EAM-OEO, the proposed system shows improved phase noise characteristics and receiver sensitivity.
关键词： remote optical frequency up-conversion,passive optical network (PON),Optoelectronic oscillator,radio-over-fiber (RoF)
更新于2025-09-10 09:29:36