Method for low loss welding and end face treatment of photonic crystal optical fiber
A technology of photonic crystal fiber and end face treatment, which is applied in the coupling direction of optical waveguide, can solve the problems of mode field mismatch loss, limited application occasions, high cost, etc., to reduce optical coupling loss, maintain excellent characteristics, and increase connection strength Effect
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[0018] The low-loss fusion splicing and end face treatment method of the photonic crystal fiber of the present invention will be described in detail below with reference to the accompanying drawings and embodiments. The process flow is shown in figure 1 .
[0019] In the first step, the fiber material to be spliced is: the mode field diameter of the photonic crystal fiber is 29μm@976nm, and the mode field diameter of the other ordinary single-mode fiber is 9.5μm.
[0020] Using formula (1) to calculate the loss value of the conventional welding is 4.56dB.
[0021] The two optical fibers to be spliced are cut and flattened with a fiber cleaver. According to the difference in the mode field parameters of the optical fiber to be spliced, the optical fiber tapering machine 4 is used to perform the tapering process of the photonic crystal fiber 3 to change its mode field diameter. After tapering, the diameter is 10μm. about. And follow the flow chart (1) to collimate and focus the pi...
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