We designed a novel core-suspended capillary fiber that the core was suspended in the air\nhole and close to the inner surface of the capillary, and experimentally demonstrated its fabrication\ntechnology. In addition, a method for linking a single mode fiber and a core-suspended fiber was\nproposed based on splicing and tapering at the fusion point between the two fibers. By combining\nwith the optical time domain reflecto meter technology, we constructed a distributed gas sensor\nsystem to monitor greenhouse gas based on this novel fiber.
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