Fabry-Perot interferometry

Woodruff, S. D. and Yeung, E. S., Refractive index and absorption detector for liquid chromatography based on Fabry-Perot interferometry, Anal Chem., 54, 1174, 1982. 

Spectral line shape studies by Frommhold and Biondi60 (using Fabry-Perot interferometry) indicated measurable broadening of several lines coming from Ne2 and Ar2 recombination. The authors showed that dissociative recombination,... 

Cox, E. R. Jones, B. E. Fiber optic color sensors based on Fabry Perot interferometry, In First International Conference on Optical Fiber Sensors, London, 1993... 

Measurement of the Brillouin spectrum of polymer films is now straightforward using multiple-pass Fabry-Perot interferometry. The use of Brillouin scattering to study polymer blends as films should be a very fruitful area for further study. 

Because of relaxation of surface elevations, the scattered light has a broadened spectral distribution compared with the incident light. The broadening is too small to be analyzed by the conventional Fabry-Perot interferometry," however, so the more recent technique of light beating" must be used. We call this technique intensity fluctuation spectroscopy (IFS). 

Easley, C. J., Legendre, L. A., Roper, M. G, Wavering, T. A., Ferrance, J. R, and Landers, J. R, Extrinsic Fabry-Perot interferometry for noncontact temperature control of nanoliter-volume enzymatic reactions in glass microchips. Ana/. Chem., 11, 1038, 2005. 

Olson and Innes, who observed tht B- - X system of in absorption, studied the extensively predissociated level v = 3 of the B state by observations of line broadening in the 3-1 absorption band, using Fabry-Perot interferometry. (The gross perturbation in the v = 3 level was first identified by Brown and Oibson. ) An estimated B state radiative lifetime of (0.98 0.10) /weak heterogeneous predissociation is suggested to contribute to linewidths for levels of low Fluorescence decay gives a non-collisional lifetime of 0.5 /us for v = 1,2. ... 

Easley CJ, Legendre LA, Roper MG et al (2005) Extrinsic Fabry-Perot Interferometry for NtmctHitact Temperature Control of Nanoliter-Volume Enzymatic Reactions in Glass Microchips. Anal Chem 77 1038-1045... 

Figure 4.68. Measuring system for the determination of the velocity of target motion by Fabry-Perot interferometry...

Measurements of Brillouin scattering using a Fabry-Perot interferometer have been made on poly(methyl methacrylate) and poly(vinyl chloride) as a function of temperature through the glass transition (175). Only longitudinal measurements were obtained with this arrangement shear waves could not be detected. Improved measurement methods using multiple-pass Fabry-Perot interferometry have been demonstrated for polystyrene (176), poly(4-methyl-l-pentene) (177), and several other amorphous polymers (178). 

The intermediate relaxation limit in which >e = structural relaxation contributes heavily to the line width of the Brillouin lines. The relaxation processes can be resolved by means of the Fabry-Perot interferometry (24). Figure 5... 

Besides pcs, other light scattering techniques including Brillouin scattering and Fabry-Perot interferometry described in previous sections have been applied to probe the dynamics of polymers at higher frequencies than the more conventional techniques. Interpretations of the results from these techniques are still subjects of controversy and are not discussed here. 

For an isotropic polymer, the hypersonic sound velocity is determined as a function of direction, and the elastic constants are obtained by fitting the data to a set of equations known as the Christoffel equations, which essentially relate the values of Vs to the stiffness constants Cj through Cj = pV, where p is the density [24]. For a detailed discussion of this technique, the reader is referred to papers by Kruger, Pietralla and co-workers. [25-27]. More recently, the development of non-scanning Fabry— Perot interferometry has made possible faster acquisition of data to enable study of liquid-glass transitions [28]. 

In addition to the substantial literature on solvent and small-molecule translational diffusion, there is also a significant literature on small-molecule rotational diffusion. Experimental methods that report rotational diffusion behavior include VH tight scattering, as examined in different time domains with Fabry-Perot interferometry and photon correlation methods, nuclear magnetic resonance, oscillatory electrical birefringence, and time-resolved optical spectroscopy. 

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