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

TL;DR

This paper introduces a new measurement scheme for laser phase noise that reduces external fluctuation effects by using simultaneous dual-channel measurements and a specialized signal selection algorithm, enhancing accuracy for various applications.

Contribution

The paper presents a novel dual-channel measurement scheme and an algorithm to minimize external noise influence in laser phase noise measurements.

Findings

Demonstrated reduced sensitivity to external fluctuations

Validated the scheme's effectiveness through experimental results

Applicable to a wide range of technological applications

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.