Fabrication and characterization of bandpass filters based on concatenated chirped fiber gratings

K. Sugden, L. Zhang, J. A.R. Williams, R. W. Fallon, L. A. Everall, K. E. Chisholm, I. Bennion

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29 Citations (Scopus)

Abstract

Practical, low-loss (<2 dB), fiber Bragg grating single-passband transmission filters have been realized with >30 dB out-of-band rejection over ∼25 nm spectral widths. The approach adopted is based on the concatenation of two or more tailored broadband chirped gratings fabricated with low short-wavelength loss to maximize the rejection and stopband width in a filter with ∼1 nm passband. The effect of thermal aging for similar complex structures is considered in the context of three different fiber types: standard telecommunication, high germania(Ge)-doped and boron/germania(B/Ge)-codoped. It is shown that while hydrogenated B/Ge-codoped fiber exhibits excellent photosensitivity, the resulting decrease in guiding strength and thermal stability may make germania-doped fiber the more attractive choice.

Original languageEnglish
Pages (from-to)1424-1432
Number of pages9
JournalJournal of Lightwave Technology
Volume15
Issue number8
DOIs
Publication statusPublished - 1 Aug 1997
Externally publishedYes

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Keywords

  • Bandpass filters
  • Broadband
  • Chirped gratings
  • Fiber Bragg gratings
  • Thermal stability

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Sugden, K., Zhang, L., Williams, J. A. R., Fallon, R. W., Everall, L. A., Chisholm, K. E., & Bennion, I. (1997). Fabrication and characterization of bandpass filters based on concatenated chirped fiber gratings. Journal of Lightwave Technology, 15(8), 1424-1432. https://doi.org/10.1109/50.618374