We demonstrate reduction of group delay ripple (GDR) from 24 ps to 9 ps peak to peak in a four channel 43 Gb/s dispersion compensating chirped fiber grating by adiabatic UV post processing. The eye opening penalty due to the grating GDR was improved from ~2dB to <1dB for all of the channels over a range of carrier frequencies of 15GHz. Our results demonstrate that at 43 Gb/s, the adiabatic UV correction technique is sufficient to substantially improve multi-channel fiber grating performance. We also discuss three limitations of the correction technique which cause GDR to vary from channel to channel: Noise in the sampling function, cladding mode loss, and varying channel reflectivity. While these limitations are visible in our results they do not reduce the effectiveness of the adiabatic correction for our gratings.

© 2004 Optical Society of America

1. D. J. Moss, S. McLaughlin, G. Randall, M. Lamont, M. Ardekani, P. Colbourne, �??Multichannel tunable dispersion compensation using all-pass multicavity etalons,�?? OFC 2002 Technical Digest (Optical Society of America, Washington, D.C.), 132.
2. C. K. Madsen, �??Integrated waveguide all pass filter tunable dispersion compensators,�?? OFC 2002 Technical Digest (Optical Society of America, Washington, D.C.), 131.
3. Y. Li, B. Zhu, C. Soccolich, L. Nelson, N. Litchinitser, G. Hancsin, �??Multi-Channel High-Performance Tunable Dispersion Compensator For 40 Gb/s Transmission Systems,�?? OFC 2003 Technical Digest 2, (Optical Society of America, Washington, D.C.), 517.
4. W. H. Loh, F. Q. Zhou, and J. J. Pan, �??Sampled Fiber Grating Based-Dispersion Slope Compensator,�?? IEEE Phot. Tech. Lett. 11, 1280, October 1999. [CrossRef]
5. H. Li, Y. Sheng, Y. Li, and J. E. Rothenberg, �??Phased-Only Sampled Fiber Bragg Gratings for High-Channel-Count Chromatic Dispersion Compensation,�?? J. Lightwave Technol. 21, 2073-2084 (2003).
6. A. K. Ahuja, P. E. Steinvurzel, B. J. Eggleton, J. A. Rogers, �??Tunable single phase-shifted and superstructure gratings using microfabricated on-fiber thin film heaters,�?? Opt. Commun. 184, 119-125, October 2000. [CrossRef]
7. R. Lachance, S. Lelièvre, Y. Painchaud, �??50 and 100GHz Multi-Channel Tunable Chromatic Dispersion Slope Compensator,�?? OFC 2003 Technical Digest 1, (Optical Society of America, Washington, D.C.), 164.
8. B. J. Eggleton, A. Ahuja, P. S. Westbrook, J. A. Rogers, P. Kuo, T. N. Nielsen, and B. Mikkelsen, �??Integrated tunable fiber gratings for dispersion management in high-bit rate systems,�?? J. Lightwave Technol. 18, 1418-1432 (2000). [CrossRef]
9. A. V. Buryak and D. Y. Stepanov, �??Correction of systematic errors in the fabrication of fiber Bragg gratings,�?? Opt. Lett. 27, 1099 (2002). [CrossRef]
10. T. Komukai, T. Inui, M. Kurihara, S. Fujimoto, �??Group-delay ripple reduction in step-chirped fiber Bragg gratings by using laser-beam written step-chirped phase masks,�?? IEEE Photon. Technol. Lett. 14, 1554-1556 (2002). [CrossRef]
11. K. Y. Kolossovski, R. A. Sammut, A.V. Buryak, D. Y. Stepanov, �??Three-step design optimization for multi-channel fibre Bragg gratings,�?? Opt. Express 11, 1029-1038 (2003). <a href="http://www.opticsexpress.org/abstract.cfm?URI=OPEX-11-9-1029">http://www.opticsexpress.org/abstract.cfm?URI=OPEX-11-9-1029</a> [CrossRef] [PubMed]
12. M. Sumetsky, P. I. Reyes, P. S. Westbrook, N. M. Litchinitser, and B. J. Eggleton, �??Group delay ripple correction in chirped fiber Bragg gratings,�?? Opt. Lett. 28, 777-779, (2003). [CrossRef] [PubMed]
13. M. Sumetsky, P. S. Westbrook, P. I. Reyes, N. M. Litchinitser, B. J. Eggleton, Y. Li, R. Deshmukh, C. Soccolich, F. Rosca, J. Bennike, F. Liu, and S. Dey, �??Reduction of chirped fiber grating group delay ripple penalty through UV post processing,�?? Optical Fiber Communication Conference Postdeadline Papers PD28-1, OSA, Washington DC, 2003.
14. N. M. Litchinitser, Y. Li, M. Sumetsky, P. S. Westbrook, and B. J. Eggleton, �??Tunable dispersion compensation devices: Group delay ripple and system performance,�?? in OSA Trends in Optics and Photonics (TOPS), 86 Optical Fiber Communication Conference 2003, Technical Digest, Postconference Ed. (Optical Society of America, Washington, D. C., 2003) pp. 163-164.
15. M. Sumetsky, B. J. Eggleton, C. M. de Sterke, �??Theory of group delay ripple generated by chirped fiber gratings,�?? Opt. Express 10, 332-340 (2002), <a href="http://www.opticsexpress.org/abstract.cfm?URI=OPEX-10-7-332">http://www.opticsexpress.org/abstract.cfm?URI=OPEX-10-7-332</a> [CrossRef] [PubMed]
16. M. Sumetsky, N. M. Litchinitser, P. S. Westbrook, P. I. Reyes, B. J. Eggleton, Y. Li, R. Deskmukh, C. Soccolich, F. Rosca, J. Bennike, F. Liu, S. Dey �??High-performance 40 Gbit/s fibre Bragg grating tunable dispersion compensator fabricated using group delay ripple correction technique,�?? Electron. Lett. 39, 1196-1198, Aug. 7, 2003. [CrossRef]

Electron. Lett.

• M. Sumetsky, N. M. Litchinitser, P. S. Westbrook, P. I. Reyes, B. J. Eggleton, Y. Li, R. Deskmukh, C. Soccolich, F. Rosca, J. Bennike, F. Liu, S. Dey �??High-performance 40 Gbit/s fibre Bragg grating tunable dispersion compensator fabricated using group delay ripple correction technique,�?? Electron. Lett. 39, 1196-1198, Aug. 7, 2003. [CrossRef]

IEEE Phot. Tech. Lett.

• W. H. Loh, F. Q. Zhou, and J. J. Pan, �??Sampled Fiber Grating Based-Dispersion Slope Compensator,�?? IEEE Phot. Tech. Lett. 11, 1280, October 1999. [CrossRef]

IEEE Photon. Technol. Lett.

• T. Komukai, T. Inui, M. Kurihara, S. Fujimoto, �??Group-delay ripple reduction in step-chirped fiber Bragg gratings by using laser-beam written step-chirped phase masks,�?? IEEE Photon. Technol. Lett. 14, 1554-1556 (2002). [CrossRef]

J. Lightwave Technol.

• B. J. Eggleton, A. Ahuja, P. S. Westbrook, J. A. Rogers, P. Kuo, T. N. Nielsen, and B. Mikkelsen, �??Integrated tunable fiber gratings for dispersion management in high-bit rate systems,�?? J. Lightwave Technol. 18, 1418-1432 (2000). [CrossRef]
• H. Li, Y. Sheng, Y. Li, and J. E. Rothenberg, �??Phased-Only Sampled Fiber Bragg Gratings for High-Channel-Count Chromatic Dispersion Compensation,�?? J. Lightwave Technol. 21, 2073-2084 (2003).

OFC 2002

• D. J. Moss, S. McLaughlin, G. Randall, M. Lamont, M. Ardekani, P. Colbourne, �??Multichannel tunable dispersion compensation using all-pass multicavity etalons,�?? OFC 2002 Technical Digest (Optical Society of America, Washington, D.C.), 132.
• C. K. Madsen, �??Integrated waveguide all pass filter tunable dispersion compensators,�?? OFC 2002 Technical Digest (Optical Society of America, Washington, D.C.), 131.

OFC 2003

• Y. Li, B. Zhu, C. Soccolich, L. Nelson, N. Litchinitser, G. Hancsin, �??Multi-Channel High-Performance Tunable Dispersion Compensator For 40 Gb/s Transmission Systems,�?? OFC 2003 Technical Digest 2, (Optical Society of America, Washington, D.C.), 517.
• M. Sumetsky, P. S. Westbrook, P. I. Reyes, N. M. Litchinitser, B. J. Eggleton, Y. Li, R. Deshmukh, C. Soccolich, F. Rosca, J. Bennike, F. Liu, and S. Dey, �??Reduction of chirped fiber grating group delay ripple penalty through UV post processing,�?? Optical Fiber Communication Conference Postdeadline Papers PD28-1, OSA, Washington DC, 2003.
• R. Lachance, S. Lelièvre, Y. Painchaud, �??50 and 100GHz Multi-Channel Tunable Chromatic Dispersion Slope Compensator,�?? OFC 2003 Technical Digest 1, (Optical Society of America, Washington, D.C.), 164.

Opt. Commun.

• A. K. Ahuja, P. E. Steinvurzel, B. J. Eggleton, J. A. Rogers, �??Tunable single phase-shifted and superstructure gratings using microfabricated on-fiber thin film heaters,�?? Opt. Commun. 184, 119-125, October 2000. [CrossRef]

Opt. Express

• K. Y. Kolossovski, R. A. Sammut, A.V. Buryak, D. Y. Stepanov, �??Three-step design optimization for multi-channel fibre Bragg gratings,�?? Opt. Express 11, 1029-1038 (2003). <a href="http://www.opticsexpress.org/abstract.cfm?URI=OPEX-11-9-1029">http://www.opticsexpress.org/abstract.cfm?URI=OPEX-11-9-1029</a> [CrossRef] [PubMed]
• M. Sumetsky, B. J. Eggleton, C. M. de Sterke, �??Theory of group delay ripple generated by chirped fiber gratings,�?? Opt. Express 10, 332-340 (2002), <a href="http://www.opticsexpress.org/abstract.cfm?URI=OPEX-10-7-332">http://www.opticsexpress.org/abstract.cfm?URI=OPEX-10-7-332</a> [CrossRef] [PubMed]

Opt. Lett.

• M. Sumetsky, P. I. Reyes, P. S. Westbrook, N. M. Litchinitser, and B. J. Eggleton, �??Group delay ripple correction in chirped fiber Bragg gratings,�?? Opt. Lett. 28, 777-779, (2003). [CrossRef] [PubMed]
• A. V. Buryak and D. Y. Stepanov, �??Correction of systematic errors in the fabrication of fiber Bragg gratings,�?? Opt. Lett. 27, 1099 (2002). [CrossRef]

TOPS

• N. M. Litchinitser, Y. Li, M. Sumetsky, P. S. Westbrook, and B. J. Eggleton, �??Tunable dispersion compensation devices: Group delay ripple and system performance,�?? in OSA Trends in Optics and Photonics (TOPS), 86 Optical Fiber Communication Conference 2003, Technical Digest, Postconference Ed. (Optical Society of America, Washington, D. C., 2003) pp. 163-164.

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