Multi-lobe stress region circular single polarization optical fiber and manufacturing method thereof

• Main Author: XIAO YUEYU
• Format: Patent
• Language: English
• Published: 23.12.2015
• Subjects: OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS

The invention discloses a multi-lobe stress region circular single polarization optical fiber and a manufacturing method thereof. The circular symmetric cladding layer of the prefabricated rod of the multi-lobe stress region circular single polarization optical fiber is internally provided with N spiral stress affecting bodies deviated from the fiber cores, N is greater than or equal to 3, and the longitudinal screw pitch of the stress affecting bodies is sub-millimeter scale. The manufacturing method comprises the following steps that the optical fiber prefabricated rod internally including N stress bodies is manufactured, and N is greater than or equal to 3; a motor is installed on a conventional drawing tower, and the optical fiber prefabricated rod is rotated in the drawing process so that the longitudinal screw pitch of the stress affecting bodies is enabled to be sub-millimeter scale; and a coating layer of which the refractive index is higher than that of an optical fiber cladding layer is coated on the well drawn optical fiber. The circular single polarization optical fiber structure which is low in insertion loss and high in mechanical strength and can be manufactured by utilizing the conventional optical fiber technological equipment and technological method is put forward on the basis of the principle of chiral optical fiber grating so that problems of stable transmission of single circular polarization light within certain distance can be solved.