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

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)


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
Issue number8
Publication statusPublished - 1 Aug 1997
Externally publishedYes


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

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


Dive into the research topics of 'Fabrication and characterization of bandpass filters based on concatenated chirped fiber gratings'. Together they form a unique fingerprint.

Cite this