Fabrication of a highly efficient core-mode blocker using a femtosecond laser ablation technique

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We present a method for the fabrication of a highly efficient core-mode blocker based on a laser micromachining technique. The process for the fabrication is as follows. A micron-sized crater is made by irradiation of an ultra-short pulse laser on the end face of a single-mode fiber, and then a defect that acts as a core-mode blocker is formed by splicing the cratered fiber with a normal fiber. The attenuation of the core mode was adjustable up to 25dB according to the initial crater size and the splicing condition. An all-fiber acousto-optic tunable bandpass filter built with the core-mode blocker is also demonstrated, which exhibits a low insertion loss of 1.8dB with non-resonance light suppression greater than 23dB. (c) 2009 Optical Society of America
Publisher
OPTICAL SOC AMER
Issue Date
2009-10
Language
English
Article Type
Article
Keywords

BANDPASS FILTER; FIBER; TRANSMISSION

Citation

OPTICS EXPRESS, v.17, no.21, pp.18449 - 18454

ISSN
1094-4087
URI
http://hdl.handle.net/10203/20826
Appears in Collection
PH-Journal Papers(저널논문)
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