Abstract

A new approach for eliminating aberration effects through introduction of elliptical grating facets in optical comb filters is presented. Simulation results show remarkable improvements of comb filter performance for aberration-free elliptical facets compared to traditional flat facet designs. The proposed theory was validated through design and fabrication of 100-GHz-period planar silica-on-silicon comb filters for use in multiwavelength optical sources. Multimode interference structures were used to achieve both flat-top and Gaussian spectral comb filter responses. All devices showed high extinction ratio, low nonuniformity in insertion loss, and high degree of passband shape control.

© 2005 IEEE

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  9. S. Bidnyk, A. Balakrishnan, A. Delâge, M. Gao, P. A. Krug, P. Muthukumaran and M. Pearson, "Novel architecture for design of planar lightwave interleavers", J. Lightw. Technol., vol. 23, no. 3, pp. 1435-1440, Mar. 2005.
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  13. M. Packirisamy and A. Delâge, "Planar waveguide echelle grating device with astigmatic grating facets", U.S. Patent Appl. 20030091282, 2003.

Other (13)

J. Sun, Y. Zhang and X. Zhang, "Multiwavelength lasers based on semiconductor optical amplifiers", IEEE Photon. Technol. Lett., vol. 14, no. 5, pp. 750-752, 2002.

J. Chow, G. Town, B. Eggleton, M. Ibsen, K. Sugden and I. Bennion, "Multiwavelength generation in an erbium-doped fiber laser using in-fiber comb filters", IEEE Photon. Technol. Lett., vol. 8, no. 1, pp. 60-62, 1996.

X. J. Gu, "Wavelength-division multiplexing isolation fiber filter and light source using cascaded long-period fiber gratings", Opt. Lett., vol. 23, no. 7, pp. 509-510, 1998.

G. E. Town, K. Sugden, J. Williams, I. Bennion and S. B. Poole, "Wide-band Fabry-Perot-like filters in optical fibers", IEEE Photon. Technol. Lett., vol. 7, pp. 509-510, 1998.

B. J. Eggleton, P. A. Krug, L. Poladian and F. Ouellette, "Long periodic superstructure Bragg gratings in optical fibers", Electron. Lett., vol. 30, no. 19, pp. 1620-1622, 1994.

R. M. Sova, C.-S. Kim and J. U. Kang, "Tunable all-fiber birefringence comb filters", in Proc. OFC 2002, 2002, pp. 698- 699.

B. J. Offrein, F. Horst, G. L. Bona, H. W. M. Salemink, R. Germann and R. Beyeler, "Wavelength tunable 1-from-16 flat passpand 1-from-8 add-drop filters", IEEE Photon. Technol. Lett., vol. 11, no. 11, pp. 1440 -1442, 1999.

S. Bidnyk, A. Balakrishnan, M. Gao, P. A. Krug, M. Pearson, B. Sayavong and A. Delâge, "Planar echelle grating DWDM comb filters", in Proc. Optical Fiber Communication Conf. Expo. (OFC'2004), 2004, pp. 34-36.

S. Bidnyk, A. Balakrishnan, A. Delâge, M. Gao, P. A. Krug, P. Muthukumaran and M. Pearson, "Novel architecture for design of planar lightwave interleavers", J. Lightw. Technol., vol. 23, no. 3, pp. 1435-1440, Mar. 2005.

M. Koshiba, Optical Waveguide Analysis, New York: McGraw-Hill, 1992, pp. 102-124.

K. Okamoto, Fundamentals of Optical Waveguides, New York: Academic, 1992, pp. 142-148.

K. A. McGree, "Diffraction from concave gratings in planar waveguides", IEEE Photon. Technol. Lett., vol. 7, no. 3, pp. 324-326, 1995.

M. Packirisamy and A. Delâge, "Planar waveguide echelle grating device with astigmatic grating facets", U.S. Patent Appl. 20030091282, 2003.

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