High resolution polarization spectroscopy in the strong saturation regime

Enhanced selectivity and detectability in absorption and fluorescence methods based on polarization modulation [Thesis]

“…Doppler-free laser polarization spectroscopy was first demonstrated as a high-resolution spectroscopic technique (7). Early applications centered around precise measurements of spectroscopic fine structure (7,(17)(18)(19) and evaluation of physical constants (20). In light of this, it is not surprising that most of the early theoretical descriptions did not emphasize the nature of the relationship between the measured signal and the concentration of the absorbing species.…”

Two-color, two-photon laser-induced polarization spectroscopy (LIPS) measurements of atomic hydrogen in near-adiabatic, atmospheric pressure hydrogen/air flames

“…Theoretical studies of LIPS have focused almost exclusively on the investigation of single-photon resonances [1][2][3]. Theoretical LIPS lineshapes have been calculated and saturation effects have been investigated theoretically for the case where the pump and probe beam are at the same frequency and tuned to a single-photon resonance [16].…”

“…We introduce here the technique of two-color, two-photon laser-induced polarization spectroscopy (LIPS), which has the major advantages of high sensitivity and ease of optical alignment. LIPS is an optical diagnostic technique that is essentially a spatially resolved absorption measurement [1][2][3]. The LIPS signal is a coherent laserlike beam and the optical alignment is fairly simple because the signal beam is collinear with the probe beam [4].…”

Doppler-free magnetic optical activity

“…An all-order calculation of DFPS signals has been computed by Ritze et al [17] for high J values. Such a sum on all magnetic sublevels of terms similar to the 0 -~ 1 expressions (6) may be carried out numerically Fig.…”