Fabry-Perot systems

The construction of our Fabry-Perot spectrometer is quite simple. The driving mechanism is similar to that used for FIR Fabry-Perot system developed by Okuda et al.(1986). The etalon is supported by plate spring, and... 

The advent of lasers allowed optical interferometry to become a useful and accurate technique to determine surface motion in shocked materials. The two most commonly used interferometric systems are the VISAR (Barker and Hollenbach, 1972) and the Fabry-Perot velocity interferometer (Johnson and Burgess, 1968 Durand et al., 1977). Both systems produce interference fringe shifts which are proportional to the Doppler shift of the laser light reflected from the moving specimen surface. Both can accommodate a speci-... 

Jerman, J. H., and D. ]. Clift. Miniature Fabry-Perot Interferometers Micromachined in Silicon for the Use in Optical Fiber WDM Systems. Transducers 91 Conference, Digest of Technical Papers (1991), pp. 372-375. 

The surface forces apparatus (SEA) can measure the interaction forces between two surfaces through a liquid [10,11]. The SEA consists of two curved, molecularly smooth mica surfaces made from sheets with a thickness of a few micrometers. These sheets are glued to quartz cylindrical lenses ( 10-mm radius of curvature) and mounted with then-axes perpendicular to each other. The distance is measured by a Fabry-Perot optical technique using multiple beam interference fringes. The distance resolution is 1-2 A and the force sensitivity is about 10 nN. With the SEA many fundamental interactions between surfaces in aqueous solutions and nonaqueous liquids have been identified and quantified. These include the van der Waals and electrostatic double-layer forces, oscillatory forces, repulsive hydration forces, attractive hydrophobic forces, steric interactions involving polymeric systems, and capillary and adhesion forces. Although cleaved mica is the most commonly used substrate material in the SEA, it can also be coated with thin films of materials with different chemical and physical properties [12]. 

Bhatia, V. Murphy, K. A. Claus, R. O. Jones, M. E. Grace, J. F. Tran, T. A. Greene, J. A., Optical fiber based absolute extrinsic Fabry Perot interferometric sensing system, Meas. Sci. 

Liang, W. Yang, L. Poon, J. K. Huang, Y. Vahala, K. J. Yariv, A., Transmission char acteristics of a Fabry Perot etalon microtoroid resonator coupled systems, Opt. Lett. 2006, 31, 510 512... 

Let us consider an optical system with two modes at the frequencies oo and 2oo interacting through a nonlinear crystal with second-order susceptibility placed within a Fabry-Perot interferometer. In a general case, both modes are damped and driven with external phase-locked driving fields. The input external fields have the frequencies (0/, and 2(0/,. The classical equations describing second-harmonic generation are [104,105] ... 

Let us consider a quantum optical system with two interacting modes at the frequencies coi and ff>2 = respectively, interacting by way of a nonlinear crystal with second-order susceptibility. Moreover, let us assume that the nonlinear crystal is placed within a Fabry-Perot interferometer. Both modes are damped via a reservoir. The fundamental mode is driven by an external field with the frequency (0/ and amplitude F. The Hamiltonian for our system is given by [169,178] ... 

Another recent notable technical advance has been the development of a pulsed Orotron source currently being used and tested in the 360 GHz system at Berlin. This electron-beam device (Smith Purcell free electron laser) has feedback via a high-Q Fabry-Perot cavity and thus features good frequency stability as well as pulse output powers at 360 GHz in the many tens of mW. 

A simple model that makes it possible to describe optical bistability in a variety of systems is a plane nonlinear Fabry-Perot interferometer, filled with a medium whose refractive index is intensity dependent [106]. The slow kinetics of a... 

The electric dipole interaction of the standing wave electric field in a Fabry-Perot cavity with a two-level system has been treated theoretically by Campbell, Buxton,... 

The first stage was the production of a pulsed free-jet molecular beam of helium containing 20% CO, which was then crossed with an electron beam to produce ionisation. The ions were produced close enough to the beam nozzle for cooling to occur downstream. Some 4 cm from the nozzle the beam entered a confocal Fabry-Perot cavity where it was exposed to millimetre wave radiation close to 120 GHz in frequency. Following microwave excitation, when on resonance, the beam was probed with a Nd YAG pumped dye laser beam with the frequency chosen to drive rovibronic components of the A 2 U-X 2 + band system. Figure 11.54 shows two recordings of a spin component of the lowest rotational transition the line shown in (a) is... 

The metal layers frequently consist of chromium (semitransparent absorber metal) or aluminum (opaque reflector metal). Silicon dioxide or magnesium fluoride are the materials mostly used for the dielectric layers. In the case of pigment particles, there is a symmetrical arrangement of the layers, as shown in Figure 5.28, whereas optical coatings can also consist of a system of unsymmetrical layers. All these arrangements are the basis for an optical phenomenon called the Fabry-Perot effect... 

Worthy of speoial mention is the use of laser for phonon detection, as in Brillouin speotrosoopy which is especially suitable for deteoting surface acoustic waves (SAWs). Generalized SAWs can be used to obtain Brillouin speotra with a 5-pass Fabry-Perot interferometer [29] on the other hand, pseudo-SAWs, which are weaker than the previous ones, require a tandem (3 -r 3)-pass Fabry-Perot interferometer system [30]. 

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