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High-performance all-fiber Fabry-Perot filters with superimposed chirped Bragg gratings

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3 Author(s)
R. Slavik ; Dept. of Electr. & Comput. Eng., Laval Univ., Que., Canada ; S. Doucet ; S. LaRochelle

The performance of large-band Fabry-Perot (FP) filters is investigated through numerical simulations and experimental realization. The limitations of the filters are studied theoretically to determine the impact of the chirped fiber Bragg grating (FBG) imperfections on spectral variations of the free spectral range (FSR), finesse, transmission loss, and polarization dependent loss (PDL). All-fiber FP devices are realized experimentally with finesse reaching 240 and covering a spectral band of 26 nm. For finesse up to 80, the filters present acceptable performance in terms of spectral variations of FSR (±3%), finesse, attenuation (±0.5 dB), PDL (<0.2 dB), and insertion loss (<3 dB).

Published in:

Journal of Lightwave Technology  (Volume:21 ,  Issue: 4 )