APPARATUS FOR MEASURING FP TRANSMITTANCE CURVE USING WHISPERING GALLERY MODE LASER LIGHT SOURCE, AND METHOD

An apparatus for measuring an FP transmittance curve using a whispering gallery mode laser light source, and a method. The apparatus comprises a seed laser device, a first polarizer 1, a second polarizer 2, a spectroscope 0, a beam narrowing system, a lens 3 and a PDMS which are provided in sequence; the spectroscope 0 corresponds to a detector 0; a first spectrometer 0 is provided corresponding to the PDMS; a first optical fiber 1 is preset into one end of the PDMS, and a second optical fiber 2 is preset into the other end thereof; laser passing through the lens 3 is focused to an end face of the first optical fiber 1; and the second optical fiber 2 corresponds to a collimator, the collimator corresponds to a first beam splitter 1, the first beam splitter 1 respectively corresponds to a second beam splitter 2 and an aperture, the second beam splitter 2 respectively corresponds to a second spectrometer 1 and a first detector 1, the aperture corresponds to an FP, the FP corresponds to a third beam splitter 3,