Inner wall melt-embedded type multicore single mode polarization-maintaining fiber grating and manufacture method
A polarization-maintaining optical fiber and multi-core optical fiber technology, applied in polarized optical fiber, cladding optical fiber, optical waveguide light guide, etc., can solve the problems of inconsistent fiber core grating pitch, poor tunability, and large difference in grating reflection peak, etc., to achieve Improve the effect of integration and polarization maintaining characteristics
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Embodiment approach 1
[0029] refer to Figure 4 A schematic diagram of a device for manufacturing an inner-wall fusion-embedded multi-core single-mode polarization-maintaining fiber grating according to the present invention.
[0030] The air hole of the present invention is circular and coaxial with the cladding (Fig. 3(a)) The embodiment of the manufacturing method of the inner wall fusion-embedded three-core single-mode polarization-maintaining fiber grating specifically includes the following steps:
[0031] ①. Take an inner wall-embedded three-core single-mode polarization-maintaining optical fiber 5, strip off the coating layer of the optical fiber with a length of 3-4cm, clean it and fix it on a rotatable optical fiber fixture;
[0032] ②. Adjust the fixture so that the long axis of one fiber core of the optical fiber is parallel to the phase mask 10 and aligned with the ultraviolet writing light source 6; adjust the phase mask 10 to be close to the optical fiber, and fix it after adjustment...
Embodiment approach 2
[0039] refer to Figure 5 schematic diagram.
[0040] The air hole of the present invention is circular and coaxial with the cladding, and the embodiment of the method for making the grating of the inner wall fusion-embedded dual-core single-mode polarization-maintaining optical fiber (see Figure 2 (a)) with the same reflection peak specifically includes the following steps :
[0041] ①. Take a dual-core single-mode polarization-maintaining optical fiber 13 with an inner wall fusion, strip off the coating layer of the optical fiber with a length of 3-4cm, fix it on a rotatable optical fiber fixture after cleaning, and observe the position of the fiber core with a microscope ;
[0042] ②. Adjust the rotatable fiber clamp to adjust the two cores of the optical fiber to be parallel to the phase mask 10; or make the two cores of the optical fiber perpendicular to the phase mask 10. Add a focusing lens 11 between the optical fiber 13, so that the focal point 12 of the diffractio...
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