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Atomic excitation state anomalous dispersion atom light filter and method for filtering signal light

An atomic optical filter and anomalous dispersion technology, applied in the field of optoelectronics, can solve the problems of increasing the cost of optical filters and achieve the effect of reducing costs

Active Publication Date: 2012-03-21
浙江法拉第激光科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So such a pumping system will greatly increase the cost of the filter, and even the ultra filter itself

Method used

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  • Atomic excitation state anomalous dispersion atom light filter and method for filtering signal light
  • Atomic excitation state anomalous dispersion atom light filter and method for filtering signal light
  • Atomic excitation state anomalous dispersion atom light filter and method for filtering signal light

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A kind of implementation structure diagram of the present invention is as figure 1As shown, the polarities of the first permanent magnet 2 and the second permanent magnet 6 are oppositely placed to form a parallel magnetic field in the axial direction. The permanent magnets 2 and 6 are ring-shaped, and the middle can transmit light. The first permanent magnet 2 and the second permanent magnet 6 also can not adopt figure 1 placed in the way, and placed in figure 1 The upper and lower sides of the electrodeless lamp 5 are opposite in polarity, thereby forming a magnetic field perpendicular to the axial direction. Different magnitudes and directions of the magnetic field can be obtained by adjusting the positions of the first permanent magnet 2 and the second permanent magnet 6 . Between the first permanent magnet 2 and the second permanent magnet 6 is an electrodeless lamp 5, and the electrodeless lamp 5 is a cylindrical glass bubble, which is filled with working atomic...

Embodiment 2

[0057] Another implementation structure of the present invention is as attached figure 2 shown. Its structure is close to Embodiment 1, but compared with Embodiment 1, the static magnet is omitted. Its structure is briefly described as follows.

[0058] The electrodeless lamp 5 is arranged inside the magnetic shielding box 3, and the radio frequency coupling coil 4 is wound outside the electrodeless lamp 5. Also, do not touch the electrodeless discharge lamp 5. The heating element 9 heats the electrodeless lamp 5, and the temperature control device controls the heating temperature. The heating element 9 may be a heating coil. The circuit box 10 supplies power to the heating element 9 through the electric wire 11, and at the same time, the circuit box 10 supplies power to the radio frequency coupling coil 4 through the electric wire 11. After the circuit box 10 is opened, the electric power of 60 to 200 MHz is supplied to the electrodeless lamp 5, and at the same time, the r...

Embodiment 3

[0066] The structure of embodiment 3 is the same as that of embodiment 1, except that there may be two or more electrodeless lamps 5, and two or more electrodeless lamps are combined in a cascade manner. Its use method is the same as that of Embodiment 1, and a good filtering effect can be obtained by adjusting different temperature and magnetic field conditions.

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Abstract

The invention discloses an atomic excitation state anomalous dispersion atom light filter and a method for filtering signal light. The filter comprises a first polarizing device, a second polarizing device, at least one electrodeless lamp and a heating element; the electrodeless lamp is located between the first polarizing device and the second polarizing device; the maximum extinction effect on light without rotation effect is realized in polarizing directions of the first and second polarizing devices; a static magnetic field which is adjustable in size and direction is formed in the electrodeless lamp; the both ends of the electrodeless lamp close to the polarizing device can transmit light; and the heating element is fixed to the electrodeless lamp. The method for filtering the signallight comprises the following steps of: 1) adjusting size of the static magnetic field in the light filter; 2) heating and starting the electrodeless lamp; and 3) making the signal light pass throughthe second polarizing device after passing through the first polarizing device and the electrodeless lamp for rotation of polarizing surface to obtain filtered signal light. Because the atom light filter composed of the electrodeless lamp is used, a pumping laser system can be removed so that cost, volume and complexity of the light filter can be greatly reduced.

Description

technical field [0001] The invention relates to the field of optoelectronic technology, in particular to an atomic optical filter for atomic light filtering by utilizing the abnormal dispersion phenomenon generated by atoms in a magnetic field and a method for filtering signal light using the optical filter. technical background [0002] In the process of space optical communication, underwater optical communication, and lidar remote sensing, the optical signal is easily interfered by stray light such as sunlight and stars. The function of the optical filter is to shield the interference light of other frequencies other than the signal optical frequency. Inferiority directly affects the quality of communication. Compared with traditional interference filters and birefringent crystal filters, atomic filters have narrower bandwidths, better sideband suppression ratios, larger access angles, and greater transmittance. And the working frequency can be tuned within a certain ran...

Claims

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Application Information

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IPC IPC(8): H01S3/0915H01S3/00G02B27/28
Inventor 陈景标庄伟孙钦青
Owner 浙江法拉第激光科技有限公司
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