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Atomic steam magneto-optical modulator

A magneto-optical modulator and atomic vapor technology, applied in the fields of instruments, optics, nonlinear optics, etc., can solve the problems of high magnetic field strength and inability to improve the modulation speed, achieve small magnetic induction intensity, small signal modulation magnetic field amplitude, and expand applications. range effect

Inactive Publication Date: 2003-12-10
WUHAN INST OF PHYSICS & MATHEMATICS CHINESE ACADEMY OF SCI
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AI Technical Summary

Problems solved by technology

[0004] The Verdet constants of the currently used phosphorous glass, light flint glass, crystal, table salt, phosphorus and other optically active materials are all less than 100, and the required magnetic field strength is so large that the modulation speed cannot be increased; the currently used yttrium iron garnet (YIG ) crystal, its Verdet constant is 1700, and it rotates 172° / cm when the magnetic field strength is 1770Gs; the Verdet constant of gallium-doped YIG is 7200, and it rotates 112° / cm when the magnetic field strength is 270Gs, but it is only suitable for 1.15 ~5μm band

Method used

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  • Atomic steam magneto-optical modulator
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  • Atomic steam magneto-optical modulator

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Embodiment Construction

[0014] Below in conjunction with accompanying drawing, the present invention will be further described.

[0015] by such as figure 1 It can be seen that the atomic vapor magneto-optic modulator is composed of a DC magnetic field coil 1, a modulating magnetic field coil 2, a constant temperature box 3, polarizing prisms 4 and 6, and an optically active material 5, wherein the outer edge of the cylindrical optically active material 5 is covered with a cylindrical thermostatic box 3, The cylindrical modulating magnetic field coil 2 is covered with a cylindrical thermostat 3, and then the cylindrical DC magnetic field coil 1 is covered, and a pair of orthogonal polarizers 4 and 6 are added to both ends of the cylindrical optically active material 5, and the optically active material 5 adopts Atomic vapor bubbles of one of sodium, potassium, rubidium, and cesium.

[0016] Take the working wavelength of cesium atom at 852nm as an example: in the constant temperature box 3, the temp...

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Abstract

The magneto-optical modulator is formed from D.C. magnetic field coil, modulation magnetic field coil, constant temperature cabinet, polarization prisms and rotatory material, in which the cylindrical rotatory material exterior is covered with cylindrical constant temperature cabinet, and the exterior of the cylindrical constant temperature cabinet is covered with cylindrical modulation magnetic field coil and D.C. magnetic field coil successively, and two ends of the cylindrical rotatory material are equipped with a pair of orthogonal polaroids, and the rotatory material adopts the atomic vapor bubble of one of sodium, potassium and cesium.

Description

Technical field: [0001] The present invention relates to magneto-optic modulators, and more particularly to atomic vapor magneto-optic modulators. Background technique: [0002] The magneto-optical modulator utilizes the Faraday rotation characteristics of certain substances in a magnetic field. The polarization plane rotation angle  of general Faraday rotation materials for polarized light has a relationship with =VdB with the sample length d and magnetic induction intensity B, where V is called The Verdet constant, its unit is radian / tm, the larger the V, the stronger the optical rotation ability of the substance, the Verdet constant of different optically active substances is different, even the same optically active substance has different Verdet constants for different laser wavelengths , generally the Verdet constant is largest near the absorption resonance of the material. If the Verdet constant of the material is larger, the required magnetic induction can be smal...

Claims

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Application Information

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IPC IPC(8): G02F1/09
Inventor 李发泉程学武高克林龚顺生
Owner WUHAN INST OF PHYSICS & MATHEMATICS CHINESE ACADEMY OF SCI
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