An Etalon-Based Laser Frequency Monitor System for Iron Resonance Temperature Wind Lidar at HAARP

This research work introduces a study on enhancing a spectroscopy component for an iron resonance lidar system. The primary objective is to assess the performance of a 1 GHz etalon-based system in tracking laser frequency shifts across the iron spectrum. Rb spectroscopy is employed to oversee the etalon, facilitating the detection of frequency variations. Precisely monitoring the laser's frequency is crucial for enabling the iron resonance lidar system to accurately measure temperature. The experimental configuration and initial trials conducted at the GI-Space and Atmosphere Instrumentation Lab (GI SAIL) successfully demonstrate the etalon's ability to monitor frequency shifts with an error margin of approximately 1 MHz. These discoveries lay the groundwork for future investigations, pushing the boundaries of iron resonance lidar systems in temperature measurement and atmospheric analysis.