Polarized light characteristic real-time measuring device and method based on four-way light splitting module

A real-time measurement and spectroscopic module technology, which is applied in measurement devices, measurement of light polarization, optical radiation measurement, etc., and can solve the problem of long time consumption of polarization measurement devices.

Inactive Publication Date: 2013-04-03
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0007] The purpose of this patent is to provide a device and method for real-time measurement of the azimuth angle and ellipticity angle of polarized light based on a four-way beam splitting module, which overcomes the time-consuming problem of the existing polarization measurement device in the measurement process, and the measurement process is real-time strong; and the energy splitting method is used to avoid the influence on the polarization characteristics of the measured light source during the splitting process; the power measurement module of the device can use a classic optical power measurement module, or it can be replaced with a single photon power measurement module, which can be used for The real-time detection of classical light polarization characteristics can also be applied to the real-time detection of quantum light polarization characteristics in quantum communication; the detection system has strong portability and a wide range of applications

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  • Polarized light characteristic real-time measuring device and method based on four-way light splitting module
  • Polarized light characteristic real-time measuring device and method based on four-way light splitting module
  • Polarized light characteristic real-time measuring device and method based on four-way light splitting module

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Embodiment Construction

[0044] The entire system device that can be used for real-time measurement of polarized light characteristics such as figure 1 Shown:

[0045] 1) The measured light source 1 in this example system uses an 850nm pulsed laser, and passes the light source through a rotating polarizer and The glass group is used to simulate the changing polarization state, and the attenuation sheets with different attenuation degrees are used to simulate different levels of light intensity. The real-time polarization azimuth and ellipticity angle can be obtained through the polarizer and The slide group is read out with a reading accuracy of 0.1°;

[0046] 2) The first beam-splitting prism 2-1, the second beam-splitting prism 2-2 and the third beam-splitting prism 2-3 used in the four-way beam-splitting module 2 in this example system are custom-made beam-splitting prisms, and the clear aperture of the beam-splitting prism 12.5mm, the energy ratio of transmitted light and reflected light is 1:...

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Abstract

The invention discloses a polarized light characteristic real-time measuring device and method based on a four-way light splitting module. According to a system, three light splitting prisms are utilized to evenly divide polarized light into four ways, energy of the four ways of light passing through polarizing pieces with four different azimuth angles is detected in real time through a power detection module, the polarization azimuth angle and the ellipticity angle of incident light can be calculated by utilizing a polarizing piece energy transmittance rate equation, and accordingly the aim of real-time measurement is achieved. The system is suitable for the fields of polarized optical systems and elliptical polarization measurement and the fields of measurement and detection of laser technologies and quantum communication and the like which are related with polarization.

Description

technical field [0001] The present invention relates to single-photon detection technology and polarization characteristic measurement technology, in particular to a real-time measurement device and method for polarization characteristics based on a four-way beam splitting module, which is applicable to polarization optical systems, ellipsometric measurement fields, laser technology and quantum communication Measurement and detection fields related to polarization. technical background [0002] With the continuous deepening of people's understanding and research on the polarization phenomenon of light, polarization information has been gradually applied to the detection of targets. By detecting the polarization information of the reflected light of the target to invert the relevant information of the target to be measured, the measurable information of the target to be measured can be increased from the original dimension to three dimensions. The polarization information has...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J4/00
Inventor 张明王建宇贾建军吴金才张亮陈爽刘军
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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