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Whispering gallery mode resonator unit for low phase-noise oscillators was designed and tested at room and low temperatures. Use of the E-plane filter and optimization of the unit of coupling the resonator with microstrip transmission line allowed us to separate the operating EH1111 mode for the purpose of steady operation of the oscillator at 29.4 GHz. The obtained dependence of the resonator external...
We present two optical fiber-based radio-frequency signal distribution systems based on analog and all-digital electronics. The achieved fractional frequency transfer stabilities are similar: ∼6×10−17 (over 104 s) for analog using a 20km fiber spool.
Power quality indices characterize the nature of a power quality problem and serve as the basis for evaluating its negative impact. Due to the limitation of the traditional power quality indices in measuring transient disturbance signals, new power quality indices are developed in this paper based on S-transform. In the accurate time-frequency domain of S-transform, define four indices: instantaneous...
A novel wavelength-selective feedback approach is used for single-longitudinal-mode tuning of a pulsed optical parametric oscillator, eliminating the need for damage-prone intracavity tuning elements or for an independent injection-seeding laser source.
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