Polarization Maintaining Optical connectors allow for coupling alignment of polarization modes by choosing precise Connector keys. Compared with traditional fiber jumper, polarization-maintaining jumper has the advantages of polarization-maintaining fiber transmission polarized light signal, keeping the direction of linear polarization unchanged, improving the coherent signal-to-noise ratio, and realizing the high precision measurement of physical quantity. The polarization-maintaining connector is an important component of the coupling of two polarization-maintaining fibers. 

  It ensures that the polarization mode of the two polarization-maintaining fibers during coupling keeps the original polarization state of the polarized light and maintains a high extinction ratio for transmission. This requires precise connection between the slow axis or fast axis of the two fibers to minimize θ Angle error. Align the polarization direction of polarized light with one axis and the component of polarization assigned to the other axis will be small, thus preserving the polarization state of the transmitted light. Polarization-preserving Angle and extinction ratio reflect the degree of preserving polarization state.

  The stress rod is parallel to the optical fiber core, and the applied stress generates birefringence in the optical fiber core, which is favorable for the light to propagate in only one direction of polarization, so as to maintain the deflection. Panda stress bars are cylindrical, while bow tie stress bars are trapezoidal prism stress bars. Generally speaking, the ability of polarization-maintaining fiber to maintain the polarization state depends on the incident state of the polarized light, which requires coupling alignment of the polarized light's polarization state with the fast and slow axis directions of the polarization-maintaining fiber. 

To ensure that the two fibers are transmitted at a high extinction ratio, it is necessary to ensure that the stress bar should be aligned with the connector Key when the polarization-maintaining fiber is terminated through the fiber connector. Key alignment directly determines the link transmission function of the polarization-preserving connector. This parameter is very important.

Beside this, Splicing point will have a big influence about ER value.Shinho fiber communication's prodcut S-12PM series PM fiber fusion splicer is an automatic alignment machine,which has dua-end view and PAS alignment system.Could be applied to Panda,Bow-tie fibers and so on. Hi ER and clear endview image. S-12PM fusion splicer have sold to customers in different countries like France,Isarel,America and so on. We expect to communicate more details about PM fibers with you.