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Optoisolator

An optical isolator and magnetic optical rotation technology, applied in optics, instruments, nonlinear optics, etc., can solve the problems of difficulty in making optical isolators, and achieve the effect of increasing the spectral range and simplifying the system structure.

Active Publication Date: 2014-07-02
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

Similarly, the error and precision control during the manufacture and installation of the two polarizers and analyzers arranged at 45° to each other are relatively strict, which brings difficulties to the manufacture of optical isolators.

Method used

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specific Embodiment

[0033] An optical isolator that allows light to pass unimpeded during forward transmission, but cannot return along the original optical path and cannot enter the input end during reverse transmission. The refraction collimation effect and the reciprocal circular birefringence characteristic of the natural optical rotation crystal realize the function of the optical isolator. The task of the present invention is to realize by following scheme: incident optical fiber 1, polarizer 2, magnetic rotation optical wedge glass group 3, tapered refracting prism 4, natural optical rotation wedge crystal group 5, outgoing optical fiber 6, magnetic ring (magnetic tube ) 9 composed of optical path devices, fixed in the inner packaging tube 10, and all on the same optical axis, the inner packaging tube 10 is covered with a sealed metal shell outer packaging sleeve 13, and the optical fibers 1 and 6 are connected from the two ends of the outer packaging sleeve 13 wear out. Specific methods ...

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Abstract

The invention provides an optoisolator which can achieve forward propagating and reverse isolation of optical waves and solves the problem of an optoisolator manufactured based on the Faraday rotation type theory in the background technology. According to the optoisolator, by means of linearly polarized light generated by a polarizer in an optical path system, a nonreciprocal circular birefringence characteristics of magnetic optical rotation glass and a reciprocal circular birefringence effect of a natural optical rotation crystal, light in the forward direction can be focused at an output end again, and reflected light cannot be focused at an input end in the forward direction and is isolated after passing through magnetic optical rotation wedge-shaped glass, and accordingly, the purpose of unidirectional transmission of the light is achieved. The optoisolator has the obvious advantages of being high in isolation of light in the reverse direction, low in insertion loss, large in operation bandwidth and the like.

Description

[0001] This application is a divisional application, and the filing date of the original application is April 29, 2011, the application number is 201110111452.3, and the title of the invention is "an optical isolator and its isolation method". technical field [0002] The invention belongs to an optical passive device and its application, in particular to an optical isolator for realizing light wave forward propagation and reverse isolation. Background technique [0003] In the optical fiber communication system, the laser transmitter is very sensitive to the reflected light reflected by the optical fiber connector and the connection of various devices in the system and the Rayleigh spot of the optical fiber itself. After these reflected light enters the laser cavity, it will make the laser transmitter emit The optical signal is noisy, which will affect the work of the whole system, and will also cause the deterioration of the system transmission performance, the change of th...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/27G02F1/095
Inventor 吴易明李春艳高立民
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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