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Full stokes vector detection device and method based on fast-axis adjustable elasto-optical modulation

A technology of elastic light modulation and detection device, which is applied in measurement device, optical radiation measurement, measurement of polarization of light, etc., can solve the problem of inability to realize Stokes vector measurement, and achieves reducing design cost, ensuring accuracy, and overcoming The effect of light speed drift

Inactive Publication Date: 2018-10-12
ZHONGBEI UNIV
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Problems solved by technology

The traditional phase modulation method using an elastic optical modulator usually uses two modulators with different frequencies, and uses the difference frequency signal to realize the measurement of the Stokes vector, but usually cannot realize the measurement of the fourth component of the Stokes vector

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  • Full stokes vector detection device and method based on fast-axis adjustable elasto-optical modulation
  • Full stokes vector detection device and method based on fast-axis adjustable elasto-optical modulation
  • Full stokes vector detection device and method based on fast-axis adjustable elasto-optical modulation

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Embodiment Construction

[0022] The following clearly and completely describes the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0023] Such as figure 1 As shown, the present invention relates to a full Stokes vector detection device based on fast-axis adjustable elasto-optic modulation, which mainly includes a 45° dual-drive symmetrical structure elasto-optic modulator 2, an LC resonant high-voltage drive circuit 3, and a polarizer 4. Photodetector 5, signal acquisition unit AD6, FPGA control module 7 and control computer 8.

[0024] The light source 1 to be tested is detected by the photodetector 5 after passing through the elasto-optic modulator 2 with a ...

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Abstract

The invention belongs to the technical field of optical polarization state measurement methods and instrument equipment, and particularly relates to a full stokes vector detection device and method based on fast-axis adjustable elasto-optical modulation. The device comprises a 45-degree double-drive symmetric structure elasto-optical modulator, a polarization analyzer, a photoelectric detector, anFPGA control module and a control computer. After sequentially passing the 45-degree double-drive symmetric structure elasto-optical modulator and the polarization analyzer, a to-be-tested light source is detected by the photoelectric detector, the 45-degree double-drive symmetric structure elasto-optical modulator is connected with the FPGA control module through an LC resonance high-voltage driving circuit, the photoelectric detector is connected with the FPGA control module through a signal acquisition unit AD, and the FPGA control module is connected with the control computer. The defectsthat phase modulation methods using liquid crystal phase delayers, electro-optical modulator and the like consume time, and measurement of all full stokes vectors is achieved through multiple times of measurement are overcome, and the single-time measurement time of all the stokes vectors is in the millisecond level.

Description

technical field [0001] The invention belongs to the technical field of light polarization state measurement methods and instruments, and in particular relates to a full-Stokes vector detection device and method based on fast-axis adjustable elasto-optic modulation. Background technique [0002] Like amplitude, frequency, phase and other information, polarization is another important dimension of light wave information. Light polarization has been widely used in lighting, display, imaging, solar magnetic field measurement and navigation, and has important application significance in the fields of national life, basic scientific research, and national defense security. Light can be divided into natural light, partially polarized light and fully polarized light. For fully polarized light, it can be divided into linearly polarized light, elliptically polarized light and circularly polarized light. The application of Stokes vectors can fully describe all polarization states of l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J4/04
CPCG01J4/04
Inventor 李克武王爽王志斌李晓
Owner ZHONGBEI UNIV
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