Taper microstructure optical fiber high-order mode filter
A technology of micro-structured fiber and high-order mode, applied in the direction of cladding fiber, optical waveguide light guide, etc., can solve the problems of reducing the optical signal-to-noise ratio of single-mode transmission system, reducing the adaptability of optical fiber, etc., to improve the signal-to-noise ratio and adjustability. Strong, low insertion loss effect
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Embodiment 1
[0016] figure 1 It is an embodiment disclosed by the present invention. The tapered microstructure optical fiber high-order mode filter is prepared on the basis of microstructure optical fiber through tapering technology. The tapered microstructure optical fiber high-order mode filter consists of three parts along the fiber axis, namely, the thick uniform part at both ends, the transition part with gradual change in outer diameter on both sides and the thinner waist cone part in the middle with uniform thickness. The lengths of the thick ends with the same outer diameter at both ends of the tapered microstructure optical fiber high-order mode filter are L 1 = 5cm, L 5 = 10cm, the outer diameter of the butt end d 1 =200μm; the length of the transition part of outer diameter gradual change is L respectively 2 = 2cm, L 4 =4cm, outer diameter d of the butt end of the transition part where the outer diameter gradually changes 1 Transition to fine end outer diameter d 2 , d 2...
Embodiment 2
[0018] figure 2 It is another embodiment disclosed by the present invention. The tapered microstructure fiber high-order mode filter is prepared on the basis of the microstructure fiber through tapering technology. This makes the tapered microstructure optical fiber high-order mode filter consist of two parts along the fiber axis, that is, a thicker uniform part at both ends, and a tapered waist part with a gradually changing outer diameter. The lengths of the thick ends with the same outer diameter at both ends of the tapered microstructure optical fiber high-order mode filter are L respectively 1 = 5cm, L 5 = 10cm, the outer diameter of the butt end is d 1 =200μm, the length L of the tapered part of the outer diameter in the middle 6 = 10cm, the outer diameter d of the thinnest part of the middle outer diameter gradually changing waist cone 2 =50μm, the waist cone part is naturally formed in the tapering process, its outer contour curve is a hyperbola, and the average g...
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