Polarization stabilizing type polarization controller, power stabilizing method and polarization state adjusting method

Abstract

The invention provides a polarization stabilizing type polarization controller, a power stabilizing method and a polarization state adjusting method. The controller is characterized in that light output by an external optical fiber is changed into control light through a first collimator, sequentially passes through a first polarization state control unit and a polarizer, enters a beam splitter and then is divided into two paths, one path of the light sequentially passes through a second polarization state control unit and a second collimator to be connected with external output; and the other path of light enters a photoelectric detector, and the controller is connected with the photoelectric detector, the first polarization state control unit and the second polarization state control unit through a first cable, a second cable and a third cable respectively. The polarization state is maintained through the polarizer, the influence of factors such as large fluctuation amplitude or frequency of the polarization state of the input light can be overcome without any operation, efficient stable polarization is maintained, and the problem that the polarization state can only be maintained in a specific interval in the prior art can be solved.

Description

technical field [0001] The invention belongs to the technical field of polarization controllers, and in particular relates to a novel polarization-stabilizing polarization controller, a power stabilization method and a polarization state adjustment method. Background technique [0002] The polarization-stabilizing polarization controller is a kind of polarization controller that is widely used in optical fiber technology, and has important applications in high-speed optical communication and high-precision optical fiber sensing technology. In fiber optic systems, polarization-stabilizing polarization controllers are generally used at the front end of terminal optical signal analysis components. The polarization state is adjusted and maintained. [0003] Such as figure 1 As shown, the existing polarization-stabilizing polarization controller is mainly composed of a polarization state control unit, a polarization state test unit, and a light splitting unit, such as figure 1...

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Problems solved by technology

[0004] The existing polarization-stabilizing polarization controllers mainly have the following problems: 1) The existing technology uses the real-time test results of the polarization state as the feedback guidance, which is limited by the speed and accuracy of the polarization state test, the polarization control algorithm and other factors. When the fluctuation amplitude or frequency of the polarization state of the input light is large, the polarization state of the output light can only remain relatively stable within a specific interval; 2) For fiber optic systems with strong polarization sensitivity, random fluctuations in the polarization state within a specific interval It is difficult to quantify the impact on the optical signal detected by the terminal, adding random noise that cannot be eliminated to the optical signal, and adversely affecting the signal-to-noise ratio

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