期刊
OPTICS COMMUNICATIONS
卷 402, 期 -, 页码 238-241出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optcom.2017.06.022
关键词
Fiber optics sensor; Cladding mode; Fiber etching; Double cladding fiber
类别
资金
- Russian Foundation for Basic Research (RFBR) [16-47-730738]
- Ministry of Education and Science of Russian Federation [14.Z50.31.0015]
- US National Science Foundation [DMR-1506179]
We investigate the evolution of optical transmission through a double cladding fiber-optic structure during etching. The structure is formed by a section of SM630 fiber with inner depressed cladding between standard SMF28 fibers. Its transmission spectrum exhibits two resonance dips at wavelengths where two cladding modes have almost equal propagation constants. We measure transmission spectra with decreasing thickness of the cladding and show that the resonance dips shift to shorter wavelengths, while new dips of lower order modes appear from long wavelength side. We calculate propagation constants of cladding modes and resonance wavelengths, which we compare with the experiment. (C) 2017 Elsevier B.V. All rights reserved.
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