author = "García Fernández, P."

Encontrado 56 documentos, página mostrada 1 de 6

Effects of nonlinear dispersion on squeezed states in two-photon devices

Description: 7 págs.; 4 figs.; 1 apémdice , The deleterious effects of nonlinear dispersion on squeezed light in two-photon devices when absorption losses are included have been analyzed making use of the variables called two-mode quadrature-phase amplitudes. The uncertainties in the quadrature amplitudes have been...
Language(s): Inglés

Low-noise properties of squeezed light in transmission chains formed from nonlinear alternating attenuators and amplifiers

Description: 4 págs.; 4 figs. , An idealized model of an optical communication link in which identical sections of nonlinear attenuating fiber alternate with identical amplifiers is considered. Signal-to-noise ratios of chains of these elements for input squeezed and coherent light have been numerically evaluated. ...
Language(s): Inglés

Semiclassical formulation of the unimolecular multiphoton dissociation. Dressing of energy levels of the active mode.

Description: Using the minimum coupling Hamiltonian for deascribing the system active mode-laser fields, we have calculated the shifts of the energy levels of the active mode, produced by thr intense laser fields, by means of a methods upon a space-translation transformation. The laser field has been considered ...
Language(s): Inglés

Study of the quasicontinuum in unimolecular multiphoton dissociation. Calculation of the semiclassical transition amplitudes among heat bath levels.

Description: We have described the energy levels and the wave functions of the quasicontinuum by means of certain linear combinations of the anharmonic energy levels and wave functions of the normal modes, in order to consider mode interaction, and the Hamiltonian of the interaction heat bath-laser field has bee...
Language(s): Inglés

Infrared spectra of calcium-strontium arsenate apatites

Description: The i.r. spectra of the calcium-strontium arsenate apatites have been studied, and the OH, AsO4, CO3 and cation-oxygen fundamental frequencies assigned on the basis of group theoretical arguments. It is seen that CO3 ions are included in the lattice. It is demonstrated that Ca and Sr undergo continu...
Language(s): Inglés

Quantum noise reduction in singly resonant optical devices

Description: Quantum noise in a model of singly resonant frequency doubling, including phase mismatch and driving in the harmonic mode, is analyzed. The use of a nonlinear normalization allows us to disentangle in the spectra the squeezing induced by the system dynamics from the deleterious effect of the noise c...
Language(s): Inglés

Semiclassical formulation of multiphoton unimolecular dissociation

Description: The process of unimolecular multiphoton dissociation (U.M.D.) in an intense classical laser field is analyzed by means of a recently proposed vibrational model. The time evolution of the molecular vibrational states is determined using second-order, time-dependent perturbation theory. Finally, the p...
Language(s): Inglés

Crystalline structure and OH torsional motion in calcium-strontium arsenate apatites

Description: The crystalline structure of Ca10-xSrx(AsO4)6(OH)2 has been studied, and the lattice parameters determined. It has been found that the unit cell expands with x. Geometric parameters of the unit cell, which are defined in relation to the hindered rotation of the OH group around the c axis, have been ...
Language(s): Inglés

Analytical study of nonlinear chirped pulses: Propagation in dispersive optical fibers

Description: The generation and transmission characteristics of optical pulses with nonlinear chirp are analytically studied. When we compare our results, assuming a Gaussian pulse with a quadratic chirp at the input of a dispersive fiber, with results obtained with the Gaussian model with linear chirp, the posi...
Language(s): Inglés

Synchronization of chaotic semiconductor lasers: Application to encoded communications

Description: We numerically show that the synchronization of two chaotic semiconductor lasers is possible when a small amount of output intensity from one is injected into the other. We also show that a message can be encoded in the chaotic carrier, transmitted by an optical fiber and decoded by a receiver with ...
Language(s): Inglés

Encontrado 56 documentos, página mostrada 1 de 6

Uso de cookies: Este sitio web utiliza cookies propias y de terceros para dar un mejor servicio. Si continúa navegando se considera que acepta su uso. OKMás información