Abstract:
A phase-preserving amplification system for stellar interferometers is disclosed. In one embodiment, a pair of crystals are provided that are configured to receive an optical signal from a source such as a telescope. A pump inputs a high energy field into the crystals, amplifying the optical signals using optical parametric amplification (OPA). A beam combiner receives and combines the amplified signals and a data collection element collects the combined amplified signals.
Abstract:
Embodiments of the present invention are directed to a nuller that is used to significantly reduce or eliminate a monochromatic radiation signal within a polychromatic object field. In one embodiment, a method of nulling a coherent light from a light beam having the coherent light and an incoherent light comprises collimating the light beam having the coherent light and the incoherent light, and destructively interfering the coherent light to null the coherent light with no destructive interference of the incoherent light so as to project the incoherent light without the coherent light.
Abstract:
Disclosed is a method for producing an optical fiber coil including the following steps: a. symmetrical winding of an optical fiber around a shaft, the winding forming a pattern including a same number N of layers of each half of the optical fiber, one layer including a set of turns of optical fiber and spaces between adjacent turns, the winding forming a sectored arrangement including a regular stacking area including at least one continuous sealing surface between two layers of adjacent turns, and an overlap area where portions of optical fiber linking different turns cross each other; b. infiltration of a glue through an external surface of the overlap area in such a way that the glue infiltrates into the spaces located between adjacent turns in the regular stacking area.
Abstract:
The invention provides an apparatus for measuring the physical properties of a sample by optically monitoring the response of the sample to illumination by ultrashort optical pulses. The apparatus is a common path optical interferometer of a Sagnac type that can measure physical properties at normal incidence, i.e., a single-arm Sagnac interferometer featuring two beam splitters. Measurement is performed in such a manner that a sample is excited by a beam of ultrashort optical pulses, and variations in intensity and phase of another optical beam are detected. This enables a wide range of measurement of physical properties such as thickness, sound velocity, and thermal properties of substances.
Abstract:
The invention provides an apparatus for measuring the physical properties of a sample by optically monitoring the response of the sample to illumination by ultrashort optical pulses. The apparatus forms a common path optical interferometer of a Sagnac type that can measure physical properties at normal incidence. The interferometer is a single-arm Sagnac interferometer featuring two beam splitters. Measurement is performed in such a manner that a sample (14) is excited by a beam of ultrashort optical pulses, and variations in intensity and phase of another optical beam are detected. This enables a wide range of measurement of physical properties such as thickness, sound velocity, and thermal properties of substances.
Abstract:
An instrument for measuring a physical property of a sample by optically detecting the response of the sample to projection of an ultra-short optical pulse. A Sagnac common-path optical interferometer for measuring a physical property at a vertical input angle is provided. The interferometer is a one-arm Sagnac type and has two beam splitters. A sample (14) is excited by an ultra-short optical pulse, and changes of the strength and phase of the optical beam caused by the excitation are measured. Therefore it is possible to measure a physical property in a wide range such as the thickness of an object, a sound speed, or a thermal property.
Abstract:
El interferómetro comprende una cavidad Sagnac de guiaonda dieléctrica o fibra óptica (1 ) cerrada por un acoplador (2) con una relación de acoplo (K), en el que se introduce una señal óptica policromática con un campo eléctrico de entrada (Ee) y múltiples longitudes de onda (λ- 1 , λ- 1 , ..., λq, ..., Λ N ). La cavidad Sagnac de este interferómetro es dividida en múltiples (N) cavidades resonantes independientes y selectivas en longitud de onda, gracias a Ia inserción de un multiplexor/demultiplexor (5) AWG con dos entradas y 2xN salidas, o bien, dos multiplexores/demultiplexores AWG de una entrada y N salidas. La señal se divide circulando en el sentido de las agujas del reloj con un campo eléctrico interno (Er) y en el contrario con otro campo interno (Ecr), dentro de cada cavidad resonante y para cada longitud de onda, reflejándose con un campo eléctrico reflejado (E R ) o transmitiéndose un campo eléctrico transmitido (E T ).
Abstract translation:本发明涉及一种光学干涉仪,其包括由耦合器(2)以耦合比(K)封闭的光纤或介质波导Sagnac腔(1),涉及引入具有输入电场的多色光信号( Ee)和多个波长(λ-1,α-1,...,αq,...,αN N)。 由于插入具有两个输入和2xN个输出的AWG多路复用器/解复用器(5)或具有一个输入的两个AWG多路复用器/解复用器,本发明的干涉仪的Sagnac腔被分成多个(N)个波长选择性的独立谐振腔, N个输出。 信号被分割成在每个谐振腔内部具有内部电场(Er)和逆时针方向与另一个内部场(Ecr)顺时针地行进,并且对于每个波长,例如被反射的电场(E 或者用传输的电场(E SUB T)传输。
Abstract:
L'invention concerne un procédé de fabrication d'une bobine (10) de fibre optique comprenant les étapes suivantes : a. Enroulement symétrique d'une fibre optique autour d'un axe (11), l'enroulement formant un motif comprenant un même nombre N de couches de chaque moitié de la fibre optique, une couche comprenant un ensemble de spires de fibre optique et des espaces (19, 29, 39, 49) entre spires adjacentes, l'enroulement formant un arrangement sectorisé comprenant, d'une part, une zone d'empilement régulier (13) comprenant au moins une surface d'étanchéité (14, 24, 34) continue entre deux couches de spires adjacentes et, d'autre part, une zone de chevauchement (12) où se croisent des portions de fibre optique reliant différentes spires; b. Infiltration d'une colle (22) à travers une surface externe de la zone de chevauchement (12) de manière à ce que la colle (12) s'infiltre jusque dans les espaces (19, 29, 39, 49) situés entre spires adjacentes dans la zone d'empilement régulier (13).
Abstract:
According to some embodiments of the invention, a room temperature exciton-polariton Sagnac interferometer includes a light source, an orbital angular momentum superposition state of light component configured to receive light from said light source and output an orbital angular momentum superposition state of light, and a microcavity configured to support an exciton-polariton Bose-Einstein condensate (BEC). The orbital angular momentum superposition state of light is transmitted through the microcavity to induce a vortex superposition state in the exciton-polariton BEC. The room temperature exciton-polariton Sagnac interferometer also includes a photodetector configured to detect light emitted from the microcavity, and a processor configured to determine a Sagnac phase based on the detected light.