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

• Published in: Journal of lightwave technology Vol. 21; no. 4; pp. 1059 - 1065
• Main Authors: Slavik, R., Doucet, S., LaRochelle, S.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.04.2003; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Applied sciences; Bragg gratings; Chirp; Circuit properties; Computer simulation; Devices; Electric, optical and optoelectronic circuits; Electronics; Exact sciences and technology; Fabry-Perot; Fiber gratings; Filled plastics; Filters; Integrated optics. Optical fibers and wave guides; Noise levels; Numerical simulation; Optical and optoelectronic circuits; Page description languages; Performance loss; Polarization; Propagation losses; Spectra; Transmission loss; Performance evaluation; Integrated optics; Chirp; optical fibers; Bragg grating; Optical fiber filters; Grating in fiber; Bragg gratings; Optical polarization; Fabry Pérot interferometer; Insertion loss; Birefringence; Numerical simulation; Transmission loss; Optical fiber; Fiber filter
• ISSN: 0733-8724; 1558-2213
• DOI: 10.1109/JLT.2003.810097

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 (/spl plusmn/3%), finesse, attenuation (/spl plusmn/0.5 dB), PDL (<0.2 dB), and insertion loss (<3 dB).