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Wavelength-selective all-fiber filter based on a single long-period fiber grating and a misaligned splicing point

✍ Scribed by Xinyong Dong; Lei Su; P. Shum; Y. Chung; C.C. Chan

Publisher
Elsevier Science
Year
2006
Tongue
English
Weight
135 KB
Volume
258
Category
Article
ISSN
0030-4018

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✦ Synopsis

A novel wavelength-selective all-fiber filter using a single long-period fiber grating (LPG) interacting with a misaligned fusion splicing point has been demonstrated. The misaligned splicing point couples a part of the core mode power into the cladding modes, which is then recoupled into the core mode by the following LPG. As an optical path difference is introduced by the differential refractive index of the fiber, an in-fiber Mach-Zehnder interferometer is therefore formed, which may function as a cost-efficient WDM filter with good isolation and low insertion loss.

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