Achievement of arbitrary bandwidth of a narrow bandpass filter | Zendy

Cheng-Chung Lee | Zendy; ShengHui Chen | Zendy; Chien-Cheng Kuo | Zendy; Ching Yi Wei | Zendy

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Achievement of arbitrary bandwidth of a narrow bandpass filter

Author(s) -

Cheng-Chung Lee,

ShengHui Chen,

Chien-Cheng Kuo,

Ching Yi Wei

Publication year - 2007

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.15.015228

Subject(s) - band pass filter , bandwidth (computing) , refractive index , optics , fractional bandwidth , optical filter , materials science , passband , electronic engineering , computer science , physics , telecommunications , engineering

By adjusting the coating parameters to vary the refractive index of the thin film material, we are able to fine tune the bandwidth of a narrow bandpass filter to an arbitrary value. The relation between the varied index Deltan and the maximum arbitrary bandwidth was analyzed. A 4-skip-0 bandpass filter for a 100 GHz DWDM system was designed and fabricated. In addition, the relation between the tolerance of the index and the bandwidth was also analyzed to avoid broadening or narrowing the bandwidth. The final results showed that the arbitrary bandwidth met the requirements very well.

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