Conformador temporal optical pulses through the coupling by evanescent electromagnetic field based on the optical fibers covered with optically nonlinear material

摘要

Invention patent: b "conformador temporal optical pulses through the coupling by evanescent electromagnetic field based on the optical fibers covered with optically nonlinear material.The present invention consists of an optical device capable of temporarily accept passively or active optical pulses are injected therein; that is,This device gives form and outline if you want to give a pulse of arbitrary temporal format that is injected.The conformation occurs due to the temporal coupling of the electromagnetic field evanescent with an integral part of the device, the so-called sub device.It consists of a wave guide is covered with optically nonlinear material.The time profile or shape of the emerging pulses is a function of the integrated intensity, intensity (energy) and / or the state of polarization of optical pulses injected.The operation of the device and of the intrinsic conditions of its manufacture.The conformador temporal, as shown in Figure 1.It is composed of an optically neutral element (2) which attenuates the optical pulses (1) injected into the device itself by the lens (3),The light is guided by a conventional optical fiber (4) where a part of this is integrated in a polarization controller (5).The group formed by the elements (4) and (5) changes the state of polarization of light pulses (1) which then spread to be operated externally and is connected to the element (9).The element (9) (shown highlighted as an insertion on Figure 1) consists in the sub device, formed by an optical fiber D,The polished fiber tangentially or a guide plane covered with one or more layers of thin film optically non-linear.The optical pulse signal (1) injected into the element (9) having wavelength such that there are propagated in the bimodal scheme and feature intensity and state of polarization controlled by element (2) and the set of elements (4) and (5) respectively.The optical pulse represented by the beam (8) emerge from the element (9) is temporarily formed, are colimados by the lens (6) and the standard luminous output is shown in Figure 6 (b).A spatial selector (7), such as, for example, a shield, a crack or an iris diaphragm blocks one of the lobes light while the other that carries the pulses formed temporarily.As the beam is output sentetizado by the invention.The architecture shown in this figure can also function as a sensor qualitative and / or quantitative physical agents.Chemical or biological external that interact and change the characteristics of the material optically nonlinear element in the sub device (9) by inducing conformation additional temporal wrists oPticos emerging (8).