Method for achieving atomic energy level four-wave mixing spatial displacement and division measurement
A technology of four-wave mixing and spatial displacement, which is applied in the field of optical measurement, can solve the problems of inability to realize multi-channel coexistence, failure to realize four-wave mixing spatial displacement and split measurement, etc.
Inactive Publication Date: 2014-02-19
XI AN JIAOTONG UNIV
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[0002] In the prior art, a single pulsed laser is usually used to measure the spatial displacement and splitting of atomic energy levels, but multi-channel coexistence cannot be achieved
There is no precedent for four-wave mixing spatial displacement and splitting measurements with signals in an atomic-level system
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[0023] The method for realizing atomic-level four-wave frequency mixing spatial displacement and splitting measurement in the present invention is to reduce the frequency of the laser pulse signal generated by the laser to obtain a laser with a wavelength of 532nm, and then divide the laser into two beams, which are used as two dye lasers respectively. pumping source; the laser beam generated by one of the dye lasers passes through optical devices such as half-wave plates, beam splitters, half-transparent mirrors, reflectors, and total reflection prisms to obtain a frequency of ω 1 The relative transmission of k 1 、k 3 beam as well as with k 1 k in the same direction but with a small angle 1 ’ light; the laser beam generated by another dye laser passes through the optical device, and the frequency is ω 2 the k 2 、k 2 ′ beam, where k 2 with k 1 Beam propagation direction coincides, k 2 ' and k 1 The light beam has a small angle; k 1 、k 1 ', k 2 、k 2 ' and k 3 The ...
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The invention discloses a method for achieving atomic energy level four-wave mixing spatial displacement and division measurement. According to the method, laser pulse signals generated by a laser device are processed, and lasers with wave length being 532 nm are obtained and are divided into two beams which are used as pumping sources of two dye laser devices; a laser beam generated by one dye laser device passes through an optical device to form a light beam k1, a light beam k3 and a light beam k1', wherein the light beam k1' is in the same direction as the light beam k1, and a small included angle is formed between the light beam k1' and the light beam k1; a laser beam generated by the other dye laser device passes through the optical device to form a light beam k2 and a light beam k2', wherein the beam propagation direction of the light beam k2 coincides with that of the light beam k1, and an included angel is formed between the light beam k2' and the light beam k1; The light beams k1, k1', k2, k2' and k3 are converged to a sample pool, and two horizontal polarization four-wave mixing signals kF1 and kF2 are generated; interference experiment graphs of the four-wave mixing signals kF1 and kF2 and a detection signal k3 are measured, and therefore four-wave mixing spatial displacement and division measurement can be conducted. The method for achieving atomic energy level four-wave mixing spatial displacement and division measurement is suitable for four-wave mixing signals of open five-level systems of the types such as a cascade three-level type, a Y-type four-level type and a Y-type three-level type in an atom system.
Description
technical field [0001] The invention belongs to the technical field of optical measurement, and relates to a method for spatial displacement and split measurement, in particular to a method for realizing atomic-level four-wave mixing spatial displacement and split measurement. Background technique [0002] In the prior art, a single pulsed laser is usually used to measure the spatial displacement and splitting of atomic energy levels, but multi-channel coexistence cannot be achieved. There is no precedent for realizing four-wave mixing spatial displacement and splitting measurements with signals in an atomic-level system. The invention utilizes the controllable spatial movement and splitting of multi-beam four-wave mixing to realize spatial multi-channel switching and routing that cannot be realized by a single beam. After searching by the applicant, no documents related to the present application were found. In order to understand the present invention, the applicant gave ...
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IPC IPC(8): G01B11/02G01N21/45G02F1/35
Inventor 张彦鹏宋建平郑淮斌张贻齐黄高坪封玮康
Owner XI AN JIAOTONG UNIV
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