Search

Your search keyword '"Svelto C"' showing total 324 results
Start Over Author "Svelto C"
324 results on '"Svelto C"'

3. Minimization of errors in narrowband laser phase noise measurements based on reference measurement channels

Author

Pnev, A. B., Stepanov, K. V., Dvoretskiy, D. A., Zhirnov, A. A., Nesterov, E. T., Sazonkin, S. G., Chernutsky, A. O., Shelestov, D. A., Fedorov, A. K., Svelto, C., and Karasik, V. E.

Subjects
Physics - Instrumentation and Detectors, Physics - Data Analysis, Statistics and Probability, Physics - Optics
Abstract

We propose a novel scheme for laser phase noise measurements with minimized sensitivity to external fluctuations including interferometer vibration, temperature instability, other low-frequency noise, and relative intensity noise. In order to minimize the effect of these external fluctuations, we employ simultaneous measurement of two spectrally separated channels in the scheme. We present an algorithm for selection of the desired signal to extract the phase noise. Experimental results demonstrate potential of the suggested scheme for a wide range of technological applications., Comment: 4 pages, 4 figures; published version

Published
2016

4. Influence of the laser frequency drift in phase-sensitive optical time-domain reflectometry

Author

Zhirnov, A. A., Stepanov, K. V., Chernutsky, A. O., Fedorov, A. K., Nesterov, E. T., Svelto, C., Pnev, A. B., and Karasik, V. E.

Subjects
Physics - Instrumentation and Detectors, Physics - Data Analysis, Statistics and Probability, Physics - Optics
Abstract

The influence of the laser frequency drift on the operation of phase-sensitive optical time-domain reflectometry ($\Phi$-OTDR) systems is considered. Theoretical results based on a new numerical $\Phi$-OTDR model demonstrating the influence of the laser frequency instability on a signal are reported. This model is verified based on experimental data. It has been used to calculate the signal-to-noise ratio (SNR) of the system for different parameters of the laser source stability. As a result, quantitative requirements for lasers used in $\Phi$-OTDR systems are formulated., Comment: 8 pages, 7 figure

Published
2016
Full Text
View/download PDF

24. A smart current control for superconducting cable test

Author

Arpaia, P., Ballarino, A., Daponte, V., Domenico Maisto, Montenero, G., and Svelto, C.

Subjects
AUT, Artificial Intelligence, Maintenance, Scheduling, Optimization Methods
Abstract

A smart current control system for enhancing performance of a superconducting cable test station is proposed. According to the Fuzzy Gain Scheduling logic, the controller parameters are modulated by the working conditions. An improved flexibility for the definition of the set point is achieved. The system effectiveness has been proved through several simulations and demonstrated experimentally on the Facility for Research on Superconducting Cables at European Organization for Nuclear Research (CERN).

Published
2013

33. Frequency- and intensity-noise measurements of a widely tunable 2-mu m Tm-Ho : KYF laser

Author

Galzerano, G, Sani, E, Toncelli, A, Tonelli, M, Svelto, C, and Laporta, P

Abstract

The measurement of the frequency and intensity noise in a novel single-mode 2-mu m Tm-Ho:KYF laser is presented. The laser frequency noise is measured by exploiting the fringe side of the transmission of a Fabry-Perot interferometer. The measured power spectral density of the frequency noise is principally characterized by a random-walk noise contribution, which sets an emission linewidth of similar to 600 kHz for the 2-mu m radiation. The relative intensity noise (RIN) reaches the quantum limit of -155 dB/Hz for Fourier frequencies above 1 MHz and shows a maximum level of -90 dB/Hz at the relaxation-oscillation frequency of 20 kHz.

Published
2006

46. Measurements of near infrared frequency mixing by metal-semiconductor point-contact diodes

Author

Bava, E., Beverini, Nicolo', Carelli, Giorgio, DE MICHELE, Andrea, Galzerano, G., Moretti, A., Prevedelli, M., Sorrentino, F., and Svelto, C.

Subjects
Near-infrared, optical mixer, Frequency measurement, Phase-lock, Diode laser
Abstract

The performances of metal–semiconductor pointcontact diodes as mixers in the near-infrared region were tested. Preliminary experiments were performed in order to phase-lock two diode lasers at 850 nm a few hundred gigahertz apart. GaSb, InAs, and InSb as semiconductor layers were used. The frequency bridge between the two lasers was covered by a Gunn diode frequency locked to a 1-GHz oscillator. A novel phase-lock circuit was tested on two diode lasers 72 GHz apart.

Published
2005

Catalog

Books, media, physical & digital resources
See catalog results