What Does FSR Stand For?
FSR stands for Free Spectral Range
FSR, or Free Spectral Range, refers to the frequency spacing between adjacent resonant modes in a cavity or optical system. It is a critical parameter in applications such as interferometry and laser optics, as it determines the separation of spectral lines within the output spectrum. A larger FSR allows for better resolution and distinguishes between closely spaced wavelengths, making it essential for designing optical devices and systems for precise measurements and analysis.
Added on 14th April 2008 | Last edited on 17th June 2025 | Edit Acronym