Phase Noise and Intensity Noise of the Pulse Train Generated from Mode-locked Lasers in the Demodulation Measurement

TL;DR

This paper analyzes phase and intensity noise in pulse trains from mode-locked lasers, exploring pulse asymmetry effects theoretically and experimentally optimizing detector parameters to reduce noise and pulse distortion.

Contribution

It introduces the first theoretical analysis of pulse asymmetry effects using Fourier series and compares photodetectors to minimize pulse distortion.

Findings

Pulse asymmetry impacts phase and intensity noise.

Optimal photodetector bandwidth reduces pulse distortion.

Experimental results validate theoretical predictions.

Abstract

The phase noise and intensity noise of a pulse train are theoretically analyzed in the demodulation measurement. The effect of pulse asymmetry is discussed for the first time using Fourier series. Experimentally, photodetectors with different bandwidth and incident power levels are compared to achieve minimum pulse distortion.