Laser-induced fluorescence in the infrared from high-resolution Fourier transform spectroscopy
A comparison is made between stepwise and continuous scanning high-resolution Fourier transform spectrometers (HRFTSs) for the study of laser-induced fluorescence spectra of simple models in the infrared with a dense spectrum. The high-quality data show that the HRFTS is an excellent instrument for studying molecular structures from emission spectra. The stepwise instrument produces a better SNR in a given recording period.
We demonstrate an effective technique which allows one to characterize a small radius micro-ring resonator via low coherence interferometric measurement beyond light source bandwidth limitation. The experimental results show significant improvements in the extracted parameters.