Search results for " Oscillators"

showing 3 items of 33 documents

Noise characterization of analog to digital converters for amplitude and phase noise measurements

2017

International audience; Improvements on electronic technology in recent years have allowed the application of digital techniques in phase noise metrology where low noise and high accuracy are required, yielding flexibility in systems implementation and setup. This results in measurement systems with extended capabilities, additional functionalities and ease of use. In most digital schemes the Analog to Digital Converters (ADCs) set the ultimate performance of the system, therefore the proper selection of this component is a critical issue. Currently, the information available in literature describes in depth the ADC features only at frequency offsets far from the carrier. However, the perfo…

[SPI.OTHER]Engineering Sciences [physics]/OtherNoise temperatureThermal noiseNoise measurementComputer science1/f noise020208 electrical & electronic engineeringQuantum noise02 engineering and technologyNoise figure01 natural sciencesNoise floorNoise shapingComputer Science::Hardware ArchitectureElectric measurements0103 physical sciencesPhase noise0202 electrical engineering electronic engineering information engineeringElectronic engineeringEffective input noise temperatureOscillatorsThermal noise1/f noise Clocks Oscillators Electric measurements010301 acousticsInstrumentationClocksReview of Scientific Instruments
researchProduct

Performance analysis of dual-pump nonlinear amplifying loop mirror mode-locked all-fibre laser

2019

We numerically characterise, in the three-dimensional space of adjustable cavity parameters, the performance of a recently reported layout of a flexible figure-8 laser having two independently pumped segments of active fibre in its bidirectional ring (Smirnov et al 2017 Opt. Lett. 42 1732–5). We show that this optimisation problem can be efficiently addressed by applying a regression model based on a neural-network algorithm.

fibre optics amplifiers and oscillatorsPhysics and Astronomy (miscellaneous)02 engineering and technologySpace (mathematics)01 natural scienceslaw.invention010309 opticsmode-locked fibre lasersOpticslawFiber laser0103 physical sciencesInstrumentationPhysics[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics]Ring (mathematics)business.industrynonlinear opticsMode (statistics)Nonlinear optics021001 nanoscience & nanotechnologyLaserLoop (topology)Nonlinear system0210 nano-technologybusinessLaser Physics Letters
researchProduct

Perturbation of the oscillatory Belousov-Zhabotinsky reaction with polyethylene glycol

2003

The effects of the water soluble non-ionic polymers poly(ethylene glycol) (PEG-400, PEG-900 and PEG-2000) and poly(ethylene glycol dimethylether) (MPEG-2000) on the dynamics of the cerium ion catalyzed oscillatory Belousov-Zhabotinsky (BZ) reaction were investigated in a stirred batch reactor by measuring CO2 evolution rate and Ce(IV) absorbance changes. Addition of increasing amounts of additives strongly influences all the oscillatory parameters (induction period, time period and amplitude) to an extent that depends on the type of the additive used. The polymer perturbation effects are compared with those previously obtained with methanol and ethylene glycol (1). All these experimental ob…

reaction Oscillators (electronic) BZ reaction
researchProduct