Magnetic optical isolator rotation angle measuring method and optical parameter measuring device

A measurement method and technology for optical parameters, which are applied to measurement devices, use of optical devices, and optical performance testing, etc., can solve the problems of low optical rotation angle accuracy of magneto-optical isolators, and achieve improved contrast, accurate measurement results, and measurement automation. high effect

Inactive Publication Date: 2012-05-23
BEIJING GK LASER TECH
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Problems solved by technology

[0008] In order to solve the problem of low accuracy of measuring the optical rotation angle of the magneto-optical isolator by the prior art equipment, the present invention provides a method for measuring the optical rotation angle of the magneto-optical isolator with convenient operation and high efficiency

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  • Magnetic optical isolator rotation angle measuring method and optical parameter measuring device
  • Magnetic optical isolator rotation angle measuring method and optical parameter measuring device
  • Magnetic optical isolator rotation angle measuring method and optical parameter measuring device

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Embodiment Construction

[0026] Please refer to figure 1 Firstly, the measuring device 1 used in the first embodiment of the measuring method of the optical rotation angle of the magneto-optical isolator and the measuring method of the extinction ratio of the magneto-optical isolator of the present invention is introduced. The measuring device 1 comprises a laser 11, a polarizer 12, an aperture 13 with an adjustable aperture, a beam expander 14, an aperture 15 with an adjustable aperture, and a tooling for installing the magneto-optical isolator to be tested. 16 . A beam reducer 17 , an analyzer 18 , a photoelectric sensor 19 and a guide rail 10 . The guide rail 10 includes a plurality of sliding seats 101 that can slide along the guide rail 10 . The magneto-optical isolator to be tested is installed on the tooling 16 . Laser 11, polarizer 12, aperture 13, beam expander 14, aperture 15, frock 16, beam reducer 17, analyzer 18 and photoelectric sensing device 19 are installed on the sliding seat 101 i...

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Abstract

The invention discloses a magnetic optical isolator rotation angle measuring method and an optical parameter measuring device. The magnetic optical isolator rotation angle measuring method comprises the steps of: a, providing a laser, a beam expanding mirror, a beam reducing mirror, a polarization analyzer, and a photoelectric sensing device which are arranged along a light path; b, rotating the polarization analyzer to a reference angle display value theta 1, at this time, defining the reading of the photoelectric sensing device as P1; c, placing a polarizer between the laser and the beam expanding mirror, and rotating the polarizer to enable the reading of the photoelectric sensor to be first minimum value P2; d, placing a magnetic optical isolator to be measured between the beam expanding mirror and the beam reducing mirror, adjusting the magnetic optical isolator to enable the reading of the photoelectric sensing device to be maximal, rotating the polarizer to enable the reading of the photoelectric sensing device to be second minimum value Pmin, at this time, defining the rotation angle of the polarizer as theta 2; and e, obtaining the rotation angle theta of the magnetic optical isolator, wherein the theta is the absolute value of the difference value between the theta 1 and the theta 2. The magnetic optical isolator rotation angle measuring method disclosed by the invention has higher measuring accuracy.

Description

technical field [0001] The invention relates to a method for measuring the optical rotation angle of a magneto-optical isolator and an optical parameter measuring device. Background technique [0002] Extinction ratio is an important parameter to measure the optical performance of optical components, reflecting the defects that may exist inside it, such as internal stress, optical inhomogeneity, etc. Its extinction ratio is an important parameter to measure the optical inhomogeneity. [0003] The regulations adopt: Pmax indicates the highest optical power in the direction of the long axis of the elliptical Gaussian beam in the plane perpendicular to the optical axis, and Pmin indicates the minimum optical power in the direction of the long axis of the elliptical Gaussian beam in the plane perpendicular to the optical axis. Then the extinction ratio is defined as: [0004] EX=10lg(Pmax / Pmin) (1) [0005] The unit of extinction ratio is dB. [0006] In practical applicatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M11/02G01B11/26
Inventor 樊仲维王家赞
Owner BEIJING GK LASER TECH
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