Optimize Fabry-Pérot Interferometer Performance Through Free Spectral Range Manipulation
Free spectral range (FSR) is the wavelength spacing between modes in a Fabry-Pérot interferometer (FPI). It is determined by the cavity length and inversely proportional to it. FSR plays a crucial role in wavelength selection, filtering, and stabilization in various applications, including spectroscopy, laser measurements, and optical communications. Higher finesse, which measures the sharpness of…