Wide-range, high-accuracy multiple microwave frequency measurement by frequency-to-phase-slope mapping
Sign Up to like & getrecommendations! Published in 2020 at "Optics and Laser Technology"
DOI: 10.1016/j.optlastec.2019.105895
Abstract: Abstract A photonics-based method of instantaneous frequency measurement (IFM) based on Stimulated Brillouin scattering (SBS) is proposed and theoretically analyzed. The principle of the technique is the employment of the Brillouin gain-loss compensation and monotonous… read more here.
Keywords: phase; range; frequency measurement; frequency ... See more keywords
Switchable instantaneous frequency measurement by optical power monitoring based on DP-QPSK modulator
Sign Up to like & getrecommendations! Published in 2022 at "Chinese Physics B"
DOI: 10.1088/1674-1056/ac40ff
Abstract: We propose and analyze an instantaneous frequency measurement system by using optical power monitoring technique with improved resolution. The primary component adopted in the proposal is a dual-polarization quadrature phase shift keying (DP-QPSK) modulator which… read more here.
Keywords: qpsk modulator; frequency; measurement; frequency measurement ... See more keywords
Absolute frequency measurement of the 1S0–3P0 transition of 171Yb with a link to international atomic time
Sign Up to like & getrecommendations! Published in 2020 at "Metrologia"
DOI: 10.1088/1681-7575/ab50e8
Abstract: We report the absolute frequency measurement of the unperturbed optical clock transition 1S0 – 3P0 in 171Yb performed with an optical lattice frequency standard. Traceability to the International System of Units is provided by a… read more here.
Keywords: frequency measurement; absolute frequency; frequency; link international ... See more keywords
Absolute frequency measurement of a Yb optical clock at the limit of the Cs fountain
Sign Up to like & getrecommendations! Published in 2022 at "Metrologia"
DOI: 10.1088/1681-7575/accbc5
Abstract: We present the new absolute frequency measurement of ytterbium (171Yb) obtained at INRiM with the optical lattice clock IT-Yb1 against the cryogenic caesium (133Cs) fountain IT-CsF2, evaluated through a measurement campaign that lasted 14 months.… read more here.
Keywords: frequency; absolute frequency; measurement optical; frequency measurement ... See more keywords
Frequency Measurement of Dynamic Stress in Polarization Maintaining Fibers
Sign Up to like & getrecommendations! Published in 2018 at "IEEE Photonics Journal"
DOI: 10.1109/jphot.2018.2805465
Abstract: Up to now, the distributed polarization coupling (DPC) measurement system based on white light interferometry (WLI) has been mainly studied for static and quasi-static measurement. In this paper, we developed the DPC system to measure… read more here.
Keywords: frequency; dynamic stress; polarization maintaining; frequency measurement ... See more keywords
Photonics-Assisted Non-Scanning High-Accuracy Frequency Measurement Using Low-Speed Components
Sign Up to like & getrecommendations! Published in 2019 at "IEEE Photonics Journal"
DOI: 10.1109/jphot.2019.2922546
Abstract: Instantaneous frequency measurement of microwave signals is a fundamental functionality for applications including radar and electronic warfare. Photonic techniques have potential to enlarge the measurable frequency range, however, most of photonics-assisted solutions are lack of… read more here.
Keywords: photonics assisted; accuracy; frequency; photonics ... See more keywords
Frequency measurement of microwave signals in a wide frequency range based on an optical frequency comb and channelization method.
Sign Up to like & getrecommendations! Published in 2022 at "Applied optics"
DOI: 10.1364/ao.456507
Abstract: We propose a new, to the best of our knowledge, scheme for the frequency measurement of wideband microwave signals by applying the optical frequency comb (OFC) and channelization technique. Unlike the usual method of using… read more here.
Keywords: frequency; comb; optical frequency; microwave signals ... See more keywords
Instantaneous microwave frequency measurement with single branch detection based on the birefringence effect.
Sign Up to like & getrecommendations! Published in 2022 at "Applied optics"
DOI: 10.1364/ao.461728
Abstract: Instantaneous frequency measurement (IFM) with single branch detection based on the birefringence effect is proposed and experimentally demonstrated. The unknown microwave frequencies are modulated to pump a length of polarization maintaining fiber. Due to the… read more here.
Keywords: birefringence effect; frequency measurement; detection; single branch ... See more keywords
Microwave frequency measurement using a silicon integrated microring resonator.
Sign Up to like & getrecommendations! Published in 2022 at "Applied optics"
DOI: 10.1364/ao.465897
Abstract: Photonics-assisted instantaneous frequency measurement of a microwave signal using a silicon integrated microring resonator (MRR) is proposed and experimentally demonstrated. The frequency of a microwave signal has a unique relationship with the power ratio between… read more here.
Keywords: frequency; using silicon; silicon integrated; frequency measurement ... See more keywords
Photonics-based dual-functional system for simultaneous high-resolution radar imaging and fast frequency measurement.
Sign Up to like & getrecommendations! Published in 2019 at "Optics letters"
DOI: 10.1364/ol.44.001948
Abstract: A photonics-based dual-functional system is proposed that can simultaneously implement high-resolution radar imaging and fast frequency measurement. In this system, the radar is realized based on photonic frequency doubling and de-chirp receiving, and the frequency… read more here.
Keywords: resolution; frequency; measurement; photonics ... See more keywords
Data augmentation using a generative adversarial network for a high-precision instantaneous microwave frequency measurement system.
Sign Up to like & getrecommendations! Published in 2022 at "Optics letters"
DOI: 10.1364/ol.471874
Abstract: In this Letter, an unsupervised-learning platform-generative adversarial network (GAN)-is proposed for experimental data augmentation in a deep-learning assisted photonic-based instantaneous microwave frequency measurement (IFM) system. Only 75 sets of experimental data are required and the… read more here.
Keywords: adversarial network; frequency; data augmentation; generative adversarial ... See more keywords