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

Title
Fabrication of a highly efficient core-mode blocker using a femtosecond laser ablation technique
Authors
임선도김재구이관일이상배김병윤
Issue Date
2009-10
Publisher
Optics express
Citation
VOL 17, NO 21, 18449-18454
Abstract
We present a method for the fabrication of a highly efficient coremode 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.
URI
http://pubs.kist.re.kr/handle/201004/36373
ISSN
1094-4087
Appears in Collections:
KIST Publication > Article
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