Fabrication of high-rejection-low-loss single-passband filters in cladding depressed fiber by the chirped-grating concatenation method

L. Zhang*, Y. Liu, I. Bennion, K. Sugden, L. Dong

*Corresponding author for this work

Research output: Contribution to journalArticle


High-rejection-low-loss single-passband filters have been successfully fabricated by the chirped-grating concatenation method in a cladding depressed fiber. The enhanced photosensitivity, the enlarged bandgap between the Bragg resonance and the cladding modes, and the effective suppression of the cladding-mode outcoupling of the cladding depressed fiber permitted what is to our knowledge the first achievement of an ∼1-dB loss in the passband and 50-dB rejection for a 50-nm-wide stop band covering the entire amplified spontaneous emission spectral range of an Er-doped fiber amplifier. © 1998 Optical Society of America.

Original languageEnglish
Pages (from-to)1665-1667
Number of pages3
JournalOptics Letters
Issue number21
Publication statusPublished - Nov 1998


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