Chinese Optics Letters, 2003, 1 (1): 0115, Published Online: Jun. 6, 2006
Hollow-core tapered coupler for large inner diameter hollow-core optical fibers 
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Abstract
A novel hollow-core tapered coupler has been theoretically designed and fabricated by fiber drawing machine. The coupler's inner wall is coated with a polycrystalline GeO2 film. The coupling loss of hollow-core tapered coupler is about 0.2 dB. Hollow-core tapered coupler reduces the transmission loss of hollow-core optical fiber (HCOF) by 0.5 dB/m, therefore the coupler is suitable for coupling high power CO2 laser in industrial application.
Guiyao Zhou, Zhiyun Hou, Lantian Hou, Jigang Liu. Hollow-core tapered coupler for large inner diameter hollow-core optical fibers[J]. Chinese Optics Letters, 2003, 1(1): 0115.
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