Abstract

A new optical filter architecture is proposed that employs optical subband and all-pass filters but circumvents the typical tradeoff between passband width and peak delay inherent to all-pass filters. A filter design for a dispersion compensator with a tuning range of ± 1000 ps/nm and 95-GHz passband width on a 100-GHz grid is presented. Compared with a cascade architecture, a lower core-to-cladding index contrast for planar waveguide ring resonator implementations can be used, and lower filter losses are achieved, since the signal propagates through fewer all-pass filter stages for the same dispersion. A continuously variable delay line is designed with more than 90% bandwidth utilization. For a ten-stage all-pass filter with 25-GHz free spectral range (FSR) in a double-pass configuration,a 1000-ps continuous tuning range can be achieved. Finally, a dispersion-slope compensator design is presented with a change in dispersion of 700 ps/nm over a wavelength range determined by the filter FSR-to-channel-spacing ratio.

© 2003 IEEE

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  1. C. Madsen, S. Chandrasekhar, E. Laskowski, K. Bogart, M. Cappuzzo, A. Paunescu, L. Stulz and L. Gomez, "Compact integrated tunable chromatic dispersion compensator with a 4000 ps/nm tuning range", presented at the Optical Fiber Communication Conf., Anaheim, CA, Paper PD9, 2001.
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J. Lightwave Technol. (1)

Other (20)

T. Chiba, H. Arai, K. Ohira, H. Nonen, H. Okano and H. Uetsuka, "Novel architecture of wavelength interleaving filter with Fourier transform-based MZIs", presented at the Optical Fiber Communication Conf., Anaheim, CA, Paper WB5, 2001.

T. Mizuno, T. Kitoh, T. Saida, M. Oguma, T. Shibata and Y. Hibino, "Dispersionless interleave filter based on transversal form optical filter", Electron. Lett., vol. 38, no. 19, pp. 1121-1122, Sept. 12, 2002.

Y. Xie, S. Lee, Z. Pan, J. Cai, A. Willner, V. Grubsky, D. Starodubov, E. Salik and J. Feinberg, "Tunable compensation of the dispersion slope mismatch in dispersion-managed systems using a sampled nonlinearly-chirped FBG", IEEE Photon. Technol. Lett., vol. 12, pp. 1417 -1419, Oct. 2000.

K. Takiguchi, K. Okamoto, T. Goh, T. Saida and M. Itoh, "Integrated-optic dispersion slope equalizer for N × 40 Gb/s WDM transmission", presented at the Eur. Conf. Optical Communication, Munich, Germany,Paper 7.1.3, 2000 .

M. Shirasaki and S. Cao, "Compensation of chromatic dispersion and dispersion slope using a virtually imaged phased array", presented at the Optical Communication Conf., Anaheim, CA, Paper TuS1, Mar. 19-22, 2001.

C. Madsen, S. Chandrasekhar, E. Laskowski, K. Bogart, M. Cappuzzo, A. Paunescu, L. Stulz and L. Gomez, "Compact integrated tunable chromatic dispersion compensator with a 4000 ps/nm tuning range", presented at the Optical Fiber Communication Conf., Anaheim, CA, Paper PD9, 2001.

C. Madsen, J. Walker, J. Ford, K. Goossen and G. Lenz, "A tunable dispersion compensating MARS all-pass filter", presented at the Eur. Conf. Optical Communications, Nice, France,Paper WeB1.3, 1999.

D. Moss, S. McLaughlin, G. Randall, M. Lamont, M. Ardekani, P. Colbourne, S. Kiran and C. Hulse, "Multichannel tunable dispersion compensation using all-pass multicavity etalons", presented at the Optical Fiber Communications Conf., Anaheim, CA, Mar. 19-22 , 2002.

C. Madsen and J. Zhao, Optical Filter Design and Analysis: A Signal Processing Approach, New York: Wiley, 1999.

G. Lenz, B. Eggleton, C. Madsen and R. Slusher, "Optical delay lines based on optical filters", IEEE J. Quantum Electron., vol. 37, pp. 525-532, Apr. 2001 .

C. Madsen, G. Lenz, A. Bruce, M. Cappuzzo, L. Gomez and R. Scotti, "An all-pass filter for tunable dispersion and dispersion slope compensation", presented at the Integrated Photonics Res., Santa Barbara, CA, Paper RTuA1, July 1999.

C. Madsen, "Optical allpass filters for polarization mode dispersion compensation", Opt. Lett., vol. 25, no. 12, pp. 878-880, 2000 .

T. Sakamoto, K. Noguchi, R. Sato, A. Okada, Y. Sakai and M. Matsuoka, "Variable optical delay circuit using wavelength converters", Electron. Lett., vol. 37, no. 7, pp. 454-455, Mar. 2001.

J. Corral, J. Marti, S. Regidor, J. Fuster, R. Laming and M. Cole, "Continuously variable true time-delay optical feeder for phased-array antenna employing chirped fiber gratings", IEEE Trans. Microwave Theory Tech., vol. 45, pp. 1531-1536, Aug. 1997 .

M. Froggatt, J. Moore and T. Erdogan, "Full complex transmission and reflection characterization of a Bragg grating in a single laser sweep", presented at the Optical Fiber Communication Conf., Paper WB1, 2000 .

L. Nelson, S. Cundiff and C. Giles, "Optical monitoring using data correlation for WDM systems", IEEE Photon. Technol. Lett., vol. 10, pp. 1030 -1032, July 1998.

C. Madsen and G. Lenz, "Optical all-pass filters for phase response design with applications for dispersion compensation", IEEE Photon. Technol. Lett., vol. 10, pp. 994-996, July 1998.

M. Paiam and R. MacDonald, "Design of phased-array wavelength division multiplexers using multimode interference couplers", Appl. Opt., vol. 36, no. 21, pp. 5097-5108, 1997.

C. Madsen, "A multiport band selector with inherently low loss, flat passbands and low crosstalk", IEEE Photon. Technol. Lett., vol. 10, pp. 1766-1768, Dec. 1998.

L. Leick and C. Madsen, "Dispersion compensation of a 1 × N passive optical router with low loss, a flat passband and low cross talk", Opt. Lett., vol. 27, no. 15, pp. 1318 -1320, Aug. 1, 2002.

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