Enhancing the Sensitivity of Fabry-Perot Interferometers through Advanced Pattern Matching and Adaptive Mode Techniques

Fabry-Perot interferometers are important optical devices used in a variety of applications such as spectroscopy, sensing, and metrology. Despite their widespread applications, the sensitivity of Fabry-Perot interferometers is often affected by mode mismatches between the input and output branches, resulting in reduced measurement accuracy. This study presents a comprehensive approach to improve the sensitivity of Fabry-Perot interferometers by using advanced mode matching techniques. We optimized key design parameters such as mirror reflectivity, spacing, and precision to improve the alignment of the incident beam with the interferometer resonant mode. The experimental approach included integrating tapered fibers, lens systems, and mode converters to achieve optimal mode overlap. Through careful calibration and alignment, we minimized the mode mismatch, resulting in a significant improvement in sensitivity. The experimental results show that the interferometer's signal-to-noise ratio is significantly improved, with improved measurement accuracy and robustness. These findings highlight the critical role of mode matching techniques in improving the performance of optical interferometers. This study not only provides valuable insights into applications that require precise optical measurements, but also paves the way for advances in fields such as biomedical imaging and environmental sensing. Ultimately, the study highlights the potential for developing more precise and reliable optical devices through effective mode matching strategies.