Title :
Saturated dispersion spectroscopy of OsO4
Author :
Tyurikov, Dmitry ; Kramer, G. ; Lipphardt, B.
Author_Institution :
Quantum Radiophys. Div., Lebedev (P.N.) Phys. Inst., Moscow, Russia
fDate :
4/1/1997 12:00:00 AM
Abstract :
An optical double-frequency phase comparator is proposed for detection of sub-Doppler saturated dispersion resonances of the OsO4-absorber. This technique exhibits high sensitivity and small dependence of the background on the optical geometry. Experimental comparison of the phase resonances with normal Lamb-dips is presented. It was shown that the gain of sensitivity corresponds to the one for the method of heterodyne amplitude detection. However, the proposed technique provides the value of the signal which is free of photodetector nonlinearity and misalignment
Keywords :
Lamb shift; frequency measurement; laser frequency stability; measurement standards; modulation spectroscopy; optical modulation; optical saturable absorption; optical variables measurement; phase comparators; spectroscopy; CO2-OsO4; OsO4; OsO4-absorber; heterodyne amplitude detection; heterodyne optical detection; misalignment; nonlinear dispersion; normal Lamb-dips; optical double-frequency phase comparator; optical frequency metrology; optical geometry; phase resonances; photodetector nonlinearity; saturated dispersion spectroscopy; sub-Doppler saturated dispersion resonance; Absorption; Frequency; Nonlinear optics; Optical interferometry; Optical mixing; Optical refraction; Optical saturation; Optical sensors; Optical variables control; Spectroscopy;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
