Excited state Faraday anomalous dispersion atomic filtering method for ultra narrow band of communication waveband

An abnormal dispersion, communication band technology, applied in the field of space optical communication, can solve the problems of high environmental conditions, low practicability, complex optical path, etc., and achieve the effects of good long-term stability, efficient pumping, and simple operation process

Inactive Publication Date: 2014-05-28
PEKING UNIV
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Problems solved by technology

[0011] The technical problem to be solved by the present invention is: for the existing excited-state Faraday anomalous dispersion atomic optical filter, how to effectively improve the pumping efficiency of the ex

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  • Excited state Faraday anomalous dispersion atomic filtering method for ultra narrow band of communication waveband
  • Excited state Faraday anomalous dispersion atomic filtering method for ultra narrow band of communication waveband
  • Excited state Faraday anomalous dispersion atomic filtering method for ultra narrow band of communication waveband

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[0044] In order to make the purpose, content, and advantages of the present invention clearer, the specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0045] First, with regard to the accompanying drawings of the present invention, figure 1 Schematic diagram of the atomic transition lines used for the Rb atomic filter in the communication band. figure 2 It is a schematic diagram of the phenomenon of multiple absorption bands from the ground state energy level to the first excited state energy level of the Rb atom. image 3 Schematic diagram of the spectral lines for the phenomenon of magnetically induced multiple transition line coincidence generated by a simple theoretical model. Figure 4 A schematic diagram of a circularly polarized differential signal obtained from a simple theoretical model. Figure 5 It is a schematic diagram of the spectral line of the phen...

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Abstract

The invention belongs to the technical field of space optical communication and particularly relates to an excited state Faraday anomalous dispersion atomic filtering method for an ultra narrow band of a communication waveband. In order to effectively increase the pumping efficiency of an excited state atomic optical filter and overcome the defects of complex optical path, high environment condition requirement, poor adaptability and low practicability caused by a pumped laser frequency stabilizing module, the operation step for externally placing a frequency stabilizing module is omitted while Rb atomic vapor absorption waves inside an optical filter are used as frequency standards, so that the method is relatively simple in operation process, relatively good in working stability and relatively high in efficiency; moreover, the scheme is combined with a multi-transition absorption band generating principle, and a frequency stabilizing way with rather strong pertinence is adopted, so that a good pumping effect can be obtained.

Description

technical field [0001] The invention belongs to the technical field of space optical communication, and in particular relates to an ultra-narrow-band excited state Faraday anomalous dispersion atom filtering method in a communication band. Background technique [0002] The function of the optical filter is to extract the weak narrow-band optical signal from the strong broadband background light. One of the key components in the core. In order to effectively suppress background light noise such as solar radiation, black body radiation, scattered light caused by scattering media such as the atmosphere and sea water, and seabed bioluminescence, to ensure that the receiving system has a high signal-to-noise ratio and at the same time transmit signals efficiently Light, so that the receiving system has a higher detection sensitivity, the filter is required to have the following properties: narrow bandwidth, high transmittance, large field of view and high out-of-band noise rejec...

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Application Information

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IPC IPC(8): H01S5/06G02F1/09G02B27/28
Inventor 郭弘张建玮罗斌党安红尹龙飞
Owner PEKING UNIV
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