We present the development procedure as well as preliminary fabrication results for a CO_(2) laser-based tapering rig allowing one stage tapering of optical fibers. Our aim is to develop in-fiber devices constructed from fibers filled with various materials, which can be drawn from thick preforms using the presented procedure. The constructed tapering rig consists of a CO_(2) laser as the heating source, ellipsoid-based mirror optics, and computer-controlled high-precision motors.
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