Abstract:
A system for interpreting terahertz radiation includes a terahertz transmitter configured to output a pulse of terahertz radiation and a terahertz receiver configured to receive at least a portion of the pulse of radiation from the terahertz transmitter. The terahertz receiver is configured to output a signal based on the radiation received by the terahertz receiver.
Abstract:
Un sistema (10, 510, 610, 710, 810, 910, 1010, 1110, 1210, 1310) para interpretar una radiación de terahercios, comprendiendo el sistema (10, 510, 610, 710, 810, 910, 1010, 1110, 1210, 1310): un transmisor de terahercios (14, 514, 614, 714, 814, 914, 1014, 1114, 1214, 1314) que está configurado para emitir un pulso de radiación de terahercios (34, 534, 634, 734, 834, 1034, 1134, 1234, 1334) a través de un primer acceso (40, 540, 640, 740, 840, 940, 1240, 1340); un receptor de terahercios (16, 516, 616, 716, 816, 916, 1016, 1116, 1216, 1316) que está configurado para recibir al menos una porción del pulso de radiación de terahercios (36, 536, 636, 736, 836, 1036, 1136, 1236, 1336) a través del primer acceso (40, 540, 640, 740, 840, 940, 1240, 1340), en el que el receptor de terahercios (16, 516, 616, 716, 816, 916, 1016, 1116, 1216, 1316) está configurado para emitir una señal en función de la radiación recibida por el receptor de terahercios (16, 516, 616, 716, 816, 916, 1016, 1116, 1216, 1316); una primera interfase óptica (42, 542, 642, 742, 842, 1042, 1142, 1242, 1342) que proporciona una interferencia óptica al pulso de radiación de terahercios, en el que la primera interfase óptica (42, 542, 642, 742, 842, 1042, 1142, 1242, 1342) reflejará una primera porción reflejada de interfase óptica del pulso de radiación de terahercios hacia el receptor de terahercios (16, 516, 616, 716, 816, 916, 1016, 1116, 1216, 1316); una segunda interfase óptica (44, 544, 644, 744, 844, 944, 1044, 1144, 1244, 1344) que proporciona una interferencia óptica al pulso de radiación de terahercios, en el que la segunda interfase óptica (44, 544, 644, 744, 844, 944, 1044, 1144, 1244, 1344) reflejará una segunda porción reflejada de interfase óptica del pulso de radiación de terahercios hacia el receptor de terahercios (16, 516, 616, 716, 816, 916, 1016, 1116, 1216, 1316); estando definida una separación entre la primera interfase óptica (42, 542, 642, 742, 842, 1042, 1142, 1242, 1342) y la segunda interfase óptica (44, 544, 644, 744, 844, 944, 1044, 1144, 1244, 1344), estando la separación configurada para recibir una muestra (30, 530, 630, 730, 830, 930, 1030, 1130, 1230, 1330) que va a ser irradiada por al menos una porción del pulso de radiación de terahercios; en el que la muestra (30, 530, 630, 730, 830, 930, 1030, 1130, 1230, 1330) reflejará una primera porción reflejada de muestra del pulso de radiación de terahercios hacia el receptor de terahercios (16, 516, 616, 716, 816, 916, 1016, 1116, 1216, 1316) y una segunda porción reflejada de muestra del pulso de radiación de terahercios hacia el receptor de terahercios (16, 516, 616, 716, 816, 916, 1016, 1116, 1216, 1316); en el que el transmisor de terahercios (14, 514, 614, 714, 814, 914, 1014, 1114, 1214, 1314) y el receptor de terahercios (16, 516, 616, 716, 816, 916, 1016, 1116, 1216, 1316) están dispuestos adyacentes entre sí en una carcasa (12, 512, 612, 712, 812, 912, 1012, 1112, 1212, 1312); un procesador en comunicación con el receptor de terahercios (16, 516, 616, 716, 816, 916, 1016, 1116, 1216, 1316) y que está configurado para recibir la señal a partir del receptor de terahercios (16, 516, 616, 716, 816, 916, 1016, 1116, 1216, 1316), estando el procesador configurado para determinar el espesor de calibrador, la densidad, el índice de refracción o la masa de la muestra en función de la señal caracterizado por que el sistema (10, 510, 610, 710, 810, 910, 1010, 1110, 1210, 1310) comprende un dispositivo de división de haces (32, 532, 632, 732, 832, 932, 1032, 1132, 1232) que está configurado para dirigir una radiación de terahercios a partir del transmisor de terahercios (14, 514, 614, 714, 814, 914, 1014, 1114, 1214, 1314) hacia la primera interfase óptica (42, 542, 642, 742, 842, 1042, 1142, 1242, 1342), la muestra (30, 530, 630, 730, 830, 930, 1030, 1130, 1230, 1330) y la segunda interfase óptica (44, 544, 644, 744, 844, 944, 1044, 1144, 1244, 1344) así como para dirigir una radiación de terahercios a partir de la primera interfase óptica (42, 542, 642, 742, 842, 1042, 1142, 1242, 1342), la muestra (30, 530, 630, 730, 830, 930, 1030, 1130, 1230, 1330) o la segunda interfase óptica (44, 544, 644, 744, 844, 944, 1044, 1144, 1244, 1344) que se transmitió originalmente a partir del transmisor de terahercios (14, 514, 614, 714, 814, 914, 1014, 1114, 1214, 1314) hacia el receptor de terahercios (16, 516, 616, 716, 816, 916, 1016, 1116, 1216, 1316); y el primer acceso (40, 540, 640, 740, 840, 940, 1240, 1340) comprende una lente (38, 538, 638, 738, 938, 1038, 1138, 1238), estando la lente (38, 538, 638, 738, 938, 1038, 1138, 1238) configurada para enfocar la radiación de terahercios (34, 534, 634, 734, 834, 1034, 1134, 1234, 1334) enviada a o la radiación de terahercios (36, 536, 636, 736, 836, 1036, 1136, 1236, 1336) enviada a partir de la muestra (30, 530, 630, 730, 830, 930, 1030, 1130, 1230, 1330) a través del primer acceso (40, 540, 640, 740, 840, 940, 1240, 1340).
Abstract:
A system for varying a delay of an optical beam has a rotatable wheel and a set of one or more prisms mounted about a circumference of the rotatable wheel. The set of one or more prisms are positioned to retroreflect the optical beam that passes approximately tangent to the rotatable wheel to cause a delay or phase shift to the beam as the rotatable wheel rotates.
Abstract:
A system for dispersion compensation in a terahertz system includes an op tical fiber configured to transmit an optical pulse, a compensator optically coupled to the optical fiber, the compensator configured to compensate for a dispersion of the optical pulse caused as the optical pulse propagates thr ough the optical fiber, and an optically induced terahertz device optically coupled to the compensator, whereby the optically induced terahertz device i s configured to transmit or receive terahertz radiation.
Abstract:
A system and method for detecting anomalies concealed upon a person may include a detection probe having an electromagnetic transmitter and an electromagnetic receiver. The electromagnetic transmitter is configured to emit electromagnetic pulses, while the electromagnetic receiver is configured to sample electromagnetic pulses from the electromagnetic receiver at specified times within a waveform window. The electromagnetic pulses may span the terahertz spectral region of 0.04 to 4 THz. The system may also have optical fibers connected to the electromagnetic transmitter and electromagnetic receiver, wherein femtosecond laser pulses are directed from a source to the electromagnetic transmitter and the electromagnetic receiver by the optical fibers.
Abstract:
A system for determining at least one property of a sheet dielectric sample using terahertz radiation includes at least one terahertz transmitter configured to output a pulse of terahertz radiation, a terahertz receiver configured to receive at least a portion of the pulse of terahertz radiation, wherein the terahertz receiver is configured to output a measured waveform based on the terahertz radiation received by the terahertz receiver, and a control unit in communication with the terahertz receiver. Wherein the control unit is configured to choose at least one region of interest of the measured waveform, compare the at least one region of interest of the measured waveform to a model waveform, vary at least one parameter of a model waveform to minimize the difference between the model waveform and the measured waveform.
Abstract:
An optical delay line device includes a rotatable wheel and one or more prisms mounted about the circumference of the wheel. The one are more prisms are positioned to retroreflect the optical beam that passes approximately tangent to the wheel to cause a delay or phase shift to the beam as the wheel rotates.
Abstract:
A system for varying a delay of an optical beam has a rotatable wheel and a set of one or more prisms mounted about a circumference of the rotatable wheel. The set of one or more prisms are positioned to retroreflect the optical beam that passes approximately tangent to the rotatable wheel to cause a delay or phase shift to the beam as the rotatable wheel rotates.