Picture of scraped petri dish

Scrape below the surface of Strathprints...

Explore world class Open Access research by researchers at the University of Strathclyde, a leading technological university.

Explore

Giant subthreshold amplification in synchronously pumped optical parametric oscillators

D'Alessandro, G. and Papoff, F. (2009) Giant subthreshold amplification in synchronously pumped optical parametric oscillators. Physical Review A, 80 (2). ISSN 1094-1622

Full text not available in this repository. (Request a copy from the Strathclyde author)

Abstract

Synchronously pumped parametric oscillators have been shown to have subthreshold giant amplification of such a magnitude that a macroscopic, entirely noise-driven, signal is present at output even when the device is below threshold. In this paper we quantify the magnitude of the amplification factor in terms of some key device parameters. We use non-normal operator theory to find the noise amplification factor (Kreiss constant) and show that the signal amplitude is proportional to it. We also determine that the noise sensitivity depends in a nontrivial way on the group velocity of the three fields.