Noiseless intensity amplification of repetitive signals by coherent addition using the temporal Talbot effect

• DOI: 10.1038/ncomms6163
• Publication Date: 2014-10-16T10:48:47Z
• Authors: Reza Maram; James Van Howe; Ming Li; José Azaña
• Keywords: SIGNAL (programming language); Intensity; Amplified spontaneous emission; Talbot effect

Abstract Amplification of signal intensity is essential for initiating physical processes, diagnostics, sensing, communications and measurement. During traditional amplification, the amplified by multiplying carriers through an active gain process, requiring use external power source. In addition, degraded noise distortions that typically accompany processes. We show noiseless amplification repetitive optical pulse waveforms with from 2 to ~20 without using gain. The proposed method uses a dispersion-induced temporal self-imaging (Talbot) effect redistribute coherently accumulate energy original into fewer replica waveforms. we how our passive amplifier performs real-time average wave-train reduce its fluctuation, as well enhances extinction ratio pulses stand above floor. Our technique applicable in any spectral region or wave system.