Space adjustment mechanism for aligning polarization-maintaining fiber collimators, device and alignment method thereof

Abstract

The invention provides a space adjustment mechanism for aligning polarization-maintaining fiber collimators, which comprises a sliding substrate, two sets of mechanical adjusting parts which are the same in structure and a set of physical reference datum parts. The invention also provides an alignment device adopting the space adjustment mechanism and a method for aligning two polarization-maintaining fiber collimators by using the set of devices. The space adjustment mechanism for aligning the polarization-maintaining fiber collimators also comprises a linearly polarized light generator, a fiber connection network and an optical parameter measurement unit. The beneficial effects are achieved by adopting the content of the invention: a physical reference datum is provided, so that initialspace position alignment is simple and easy to implement; the number of mechanical movement parts is reduced by adopting a fiber optical path; online measurement is realized on optical power and polarization extinction ratio; the displacement deviation caused by eccentric adjustment is avoided; the optical power fluctuations caused by the rotation movements of the polarization-maintaining fiber collimators are reduced; by the alignment method, the adjustment efficiency is improved, and the dependence on the skill of an operator is reduced; and the shaft running phenomenon when polarization alignment is carried out is avoided by adopting the polarization-maintaining fiber optical path through a method for measuring the polarization extinction ratio.

Description

technical field [0001] The invention belongs to the technical field of optical fiber communication and optical fiber sensing, and in particular relates to a spatial position adjustment mechanism used for alignment of a polarization-maintaining optical fiber collimator, an alignment device including the mechanism, and an alignment device using the alignment device. correct alignment method. Background technique [0002] The polarization-maintaining fiber collimator is the basic component of the passive fiber optic device. The fiber passive device composed of the polarization-maintaining fiber collimator and the micro-optical crystal has a very wide range of applications in fiber optic communication and fiber optic sensing systems. Its function is to transform the light beam incident on the pigtail of the polarization-maintaining fiber collimator into parallel light output through the internal collimator lens, or converge the parallel light to the inside of the pigtail of the ...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that, firstly, in order to overcome the existing polarization-maintaining fiber collimator alignment device, the number of mechanical moving parts is large, the lack of reference physical reference, the axis needs to be fixed in advance, and the degree of dependence on the experience of the operator is high. , the disadvantages of low adjustment efficiency and large optical measurement error, the present invention provides a polarization-maintaining fiber collimator alignment space adjustment mechanism, which provides an auxiliary reference physical reference without pre-setting the axis; in addition, the present invention can solve the problem of realizing Quantitatively measure the optical power and polarization extinction ratio, improve the adjustment efficiency, reduce the dependence on the operator's experience, and also provide an alignment device using the space adjustment mechanism, and use the device to align two polarization-maintaining optical fibers Alignment methods for collimators

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