Analysis of the Performance of the Fabry-Perot Scale in Spectroscopic Applications Within High-Energy Systems

Abstract

The goal of this study is to explore the capabilities of the Fabry–Perot scale as a conventional spectroscopic element in high-energy system environments. The common Fabry-Perot interferometer is important for light analysis in the high power-density environment such as laser plasma diagnostics and fusion experiments due to its high spectral resolution and narrow-line width discrimination. In this work, we characterize the key parameters like mirror reflectivity, cavity finesse, FSR and cavity length and study their effect on interferometric sensitivity and precision. We assess the impact of thermal processes, optical nonlinearity, and laser mode structure on performance using combined analytic modeling, numerical simulation, and experimental work. Read conclusions confirming that, when subjected to significant thermal and optical load, a high-stability high-frequency precision spectral output is achievable from a Fabry-Perot interferometer with effective stabilization through optimized mirror coatings and an appropriately controlled cavity. Such thermal management techniques have the capability not only to maintain the finesse but also the transmission; the measured stability whenever the temperature was stabilized within ±2 °C) provided Kratochwil with a provisional error reduced by the factor of up to 25% via using piezoelectric-based real-time cavity length stabilization. The study has limitations, such as the use of a continuous wave (CW) laser and not assessing the long-term degradation of the system and suggests research on both: pulsed laser interaction and system degradation. The small mirror motions also support the appropriateness of the Fabry-Perot scale for high resolution spectroscopy in high energy applications.