Brillouin spectroscopy faces challenging detection capability due to strong and unavoidable elastic background light arising from specular reflections and Rayleigh scattering. This background typically overcomes the weak Brillouin peaks, limiting the spectral investigation to samples that are mostly semi-transparent.
Specto Photonics' proprietary Birefringent-Induced Phase Delay (BIPD) filter provides a simple and effective solution to suppress extremely high levels of elastic background light to enable the acquisition of the Brillouin light spectrum.
