Abstract

This paper describes a compact and practical interleave filter with uniform multi/demultiplexing properties and a wide operational wavelength range realized by using a lattice-form structure and a silica-based waveguide. In the design, we optimized the bandwidth by controlling the lattice stage number and the loss ripple in the spectrum. Moreover, we propose a novel coupler with a large fabrication tolerance, a new tandem configuration that provides uniform characteristics and low dispersion, a polarization dependence compensation method, and a folded configuration, which are effective in realizing a high-performance interleave filter. Based on the above techniques, we fabricated a 50-GHz channel spacing interleave filter by using planar-lightwave-circuit technologies and demonstrated that it performed well throughout the C-band, exhibiting a low insertion loss of about 2 dB, a low chromatic dispersion of within +/-20 ps/nm, a 1-dB passband width of over 34 GHz, and a 30-dB stopband width of over 25 GHz, which are sufficient for a 10-Gbps transmission system.

© 2004 IEEE

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J. Lightwave Technol. (3)

Other (15)

M. Kohtoku, T. Mizuno, T. Kitoh, M. Oguma, T. Shibata, Y. Inoue and Y. Hibino, "Low loss and low crosstalk PLC-based interleave filter fabricated with automatic phase trimming method", in Tech. Dig. ECOC2002, 2002.

T. Ozeki and T. Kudo, "Adaptive equalization of polarization mode dispersion", in Tech. Dig. OFC/IOOC'93, 1993, WI9.

S. K. Mitra and J. F. Kaiser, Handbook for Digital Signal Processing , New York: Wiley, 1993.

Y. P. Li, C. H. Henry, E. J. Laskowski, H. H. Yaffe and R. L. Sweatt, "Monolithic optical waveguide 1.31/1.55 µ m WDM width -50 dB crosstalk over 100 nm band width", Electron. Lett., vol. 31, no. 24, pp. 2100-2101, 1995.

Y. Hida, N. Takato and K. Jinguji, "Wavelength division multiplexer with wide passband and stopband for 1.3 µm/1.55 µm using silica-based planar lightwave circuit", Electron. Lett., vol. 31, no. 16, pp. 1377-1378, 1995.

Y. Inoue, H. Takahashi, S. Ando, T. Sawada and A. Himeno, "Elimination of polarization sensitivity in silica-based wavelength division multiplexer using a polyimide half waveplate", J. Lightwave Technol. , vol. 10, pp. 1947-1957, 1997.

Y. Inoue, M. Itoh, Y. Hashizume, Y. Hibino, A. Sugita and A. Himeno, "Novel birefringence compensation AWG design", in Tech. Dig. OFC 2001, 2001, WB4.

B. B. Dingel and M. Izutsu, "Multifunction optical filter with a Michelson-Gires-Tournois interferometer for wavelength-division-multiplexed network system applications", Opt. Lett. , pp. 1099-1101, 1998.

K. Wu and J. Liu, "Programmable wavelength router", U.S. Patent 5 867 291, 1999.

J. C. Chon, C. Huang and J. R. Bautista, "Ultra small dispersion, low loss, flat-top and all-fiber DWDM and NWDM devices for high speed optical network applications", in Proc. ECOC 2000, vol. 3, 2000, pp. 103- 104.

T. Mizuno, T. Kitoh, T. Saida, M. Oguma, T. Shibata and Y. Hibino, "Dispersionless interleave filter based on transversal structure", in Tech. Dig. OECC2002 Post-Deadline Papers , 2002, PD-2-7.

M. Oguma, K. Jinguji, T. Kitoh, T. Shibata and A. Himeno, "Flat-passband interleave filter with 200 GHz channel spacing based on planar lightwave circuit-type lattice structure", Electron. Lett., vol. 36, no. 15, pp. 1299-1300, 2000.

T. Chiba, H. Arai, K. Ohira, S. Kashimura, H. Okano and H. Uetsuka, "Chromatic dispersion free Fourier transform-based wavelength splitters for D-WDM", in Tech. Dig. OECC 2000, 2000, pp. 374-375.

D. Huang, T. Chiu and Y. Lai, "Arrayed waveguide grating DWDM interleaver", in Tech. Dig. OFC2001, 2001, WDD80.

G. Griffel, "Vernier effect in asymmetrical ring resonator arrays", IEEE Photon. Technol. Lett., vol. 12, no. 12, 2000.

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