Data di Pubblicazione:
2013
Citazione:
A method for characterizing the stability of light sources / T. Sanvito, F. Zocca, A. Pullia, M. Potenza. - In: OPTICS EXPRESS. - ISSN 1094-4087. - 21:21(2013 Oct 08), pp. 24630-24635. [10.1364/OE.21.024630]
Abstract:
We describe a method for measuring small fluctuations in the
intensity of a laser source with a resolution of 10−4. The current signal
generated by a PIN diode is passed to a front-end electronics that
discriminates the AC from the DC components, which are physically
separated and propagated along circuit paths with different gains. The gain
long the AC signal path is set one order of magnitude larger than that along
the DC signal path in such a way to optimize the measurement dynamic
range. We then derive the relative fluctuation signal by normalizing the
input-referred AC signal component to its input-referred DC counterpart. In
this way the fluctuation of the optical signal waveform relative to the mean
power of the laser is obtained. A “Noise-Scattering-Pattern method” and a
“Signal-Power-Spectrum method” are then used to analyze the intensity
fluctuations from three different solid-state lasers. This is a powerful tool
for the characterization of the intensity stability of lasers. Applications are
discussed.
Tipologia IRIS:
01 - Articolo su periodico
Elenco autori:
T. Sanvito, F. Zocca, A. Pullia, M. Potenza
Link alla scheda completa: