Abstract

Time-stretched analog-to-digital converters (ADCs) have offered revolutionary enhancements in the performance of electronic converters by reducing the signal bandwidth prior to digitization. An inherent limitation of the time-stretched ADC is the frequency-selective response of the optical system that reduces the effective number of bits for ultrawideband signals. This paper proposes a solution based on spatio-temporal digital processing. The digital algorithm exploits the optical phase diversity to create a flat RF frequency response, even when the system's transfer function included deep nulls within the signal spectrum. For a $10\times$ time-stretch factor with a 10-GHz input signal, simulations show that the proposed solution increases the overall achievable signal-to-noise-and-distortion ratio to 52 dB in the presence of linear distortions. The proposed filter can be used to mitigate the dispersion penalty in other fiber optic applications as well.

© 2007 IEEE

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References

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  1. R. H. Walden, "Analog-to-digital converter survey and analysis," IEEE J. Sel. Areas Commun. 17, 539-550 (1999).
  2. W. C. Black, D. A. Hodges, "Time interleaved converter arrays," IEEE J. Solid-State Circuits SSC-15, 1022-1029 (1980).
  3. A. Montijo, K. Rush, "Accuracy in interleaved ADC systems," Hewlett-Packard J. 44, 38-46 (1993).
  4. P. W. Juodawlkis, J. C. Twichell, G. E. Betts, J. J. Hargreaves, R. D. Younger, J. L. Wasserman, F. J. O'Donnell, K. G. Ray, R. C. Williamson, "Optically sampled analog-to-digital converters," IEEE Trans. Microw. Theory Tech. 49, 1840-1853 (2001).
  5. J. C. Twichell, R. Helkey, "Phase-encoded optical sampling for analog-to-digital converters," IEEE Photon. Technol. Lett. 12, 1237-1239 (2000).
  6. W. J. Caputi, "Stretch: A time-transformation technique," IEEE Trans. Aerosp. Electron. Syst. AES-7, 269-278 (1971).
  7. B. Jalali, F. Coppinger, Data conversion using time manipulation U.S. Patent 6 288 659 (2001).
  8. F. Coppinger, A. S. Bhushan, B. Jalali, "Photonic time stretch and its application to analog-to-digital conversion," IEEE Trans. Microw. Theory Tech. 47, 1309-1314 (1999).
  9. A. S. Bhushan, P. V. Kelkar, B. Jalali, O. Boyraz, M. Islam, "130 GSa/s photonic analog-to-digital converter with time stretch preprocessor," IEEE Photon. Technol. Lett. 14, 684-686 (2002).
  10. Y. Han, B. Jalali, "Photonic time-stretched analog-to-digital converter: Fundamental concepts and practical considerations," J. Lightw. Technol. 21, 3085-3103 (2003).
  11. O. Boyraz, J. Kim, M. N. Islam, F. Coppinger, B. Jalali, "Broadband, high-brightness 10-Gb/s supercontinuum source for A/D conversion," Proc. Lasers Electro-Opt. Conf. (2000) pp. 489-490.
  12. Y. Han, O. Boyraz, B. Jalali, "Ultrawide-band photonic time-stretch A/D converter employing phase diversity," IEEE Trans. Microw. Theory Tech. 53, 1404-1408 (2005).
  13. A. H. Sayed, Fundamentals of Adaptive Filtering (Wiley, 2003).
  14. Analog Devices Engineering StaffData Conversion Handbook New YorkElsevier (Elsevier, 2005).
  15. J. Basak, R. Sadhwani, B. Jalali, "WDM pilot tone technique for analog optical links," Electron. Lett. 39, 1083-1084 (2003).

2005 (1)

Y. Han, O. Boyraz, B. Jalali, "Ultrawide-band photonic time-stretch A/D converter employing phase diversity," IEEE Trans. Microw. Theory Tech. 53, 1404-1408 (2005).

2003 (2)

J. Basak, R. Sadhwani, B. Jalali, "WDM pilot tone technique for analog optical links," Electron. Lett. 39, 1083-1084 (2003).

Y. Han, B. Jalali, "Photonic time-stretched analog-to-digital converter: Fundamental concepts and practical considerations," J. Lightw. Technol. 21, 3085-3103 (2003).

2002 (1)

A. S. Bhushan, P. V. Kelkar, B. Jalali, O. Boyraz, M. Islam, "130 GSa/s photonic analog-to-digital converter with time stretch preprocessor," IEEE Photon. Technol. Lett. 14, 684-686 (2002).

2001 (1)

P. W. Juodawlkis, J. C. Twichell, G. E. Betts, J. J. Hargreaves, R. D. Younger, J. L. Wasserman, F. J. O'Donnell, K. G. Ray, R. C. Williamson, "Optically sampled analog-to-digital converters," IEEE Trans. Microw. Theory Tech. 49, 1840-1853 (2001).

2000 (1)

J. C. Twichell, R. Helkey, "Phase-encoded optical sampling for analog-to-digital converters," IEEE Photon. Technol. Lett. 12, 1237-1239 (2000).

1999 (2)

R. H. Walden, "Analog-to-digital converter survey and analysis," IEEE J. Sel. Areas Commun. 17, 539-550 (1999).

F. Coppinger, A. S. Bhushan, B. Jalali, "Photonic time stretch and its application to analog-to-digital conversion," IEEE Trans. Microw. Theory Tech. 47, 1309-1314 (1999).

1993 (1)

A. Montijo, K. Rush, "Accuracy in interleaved ADC systems," Hewlett-Packard J. 44, 38-46 (1993).

1980 (1)

W. C. Black, D. A. Hodges, "Time interleaved converter arrays," IEEE J. Solid-State Circuits SSC-15, 1022-1029 (1980).

1971 (1)

W. J. Caputi, "Stretch: A time-transformation technique," IEEE Trans. Aerosp. Electron. Syst. AES-7, 269-278 (1971).

Electron. Lett. (1)

J. Basak, R. Sadhwani, B. Jalali, "WDM pilot tone technique for analog optical links," Electron. Lett. 39, 1083-1084 (2003).

Hewlett-Packard J. (1)

A. Montijo, K. Rush, "Accuracy in interleaved ADC systems," Hewlett-Packard J. 44, 38-46 (1993).

IEEE J. Sel. Areas Commun. (1)

R. H. Walden, "Analog-to-digital converter survey and analysis," IEEE J. Sel. Areas Commun. 17, 539-550 (1999).

IEEE J. Solid-State Circuits (1)

W. C. Black, D. A. Hodges, "Time interleaved converter arrays," IEEE J. Solid-State Circuits SSC-15, 1022-1029 (1980).

IEEE Photon. Technol. Lett. (2)

J. C. Twichell, R. Helkey, "Phase-encoded optical sampling for analog-to-digital converters," IEEE Photon. Technol. Lett. 12, 1237-1239 (2000).

A. S. Bhushan, P. V. Kelkar, B. Jalali, O. Boyraz, M. Islam, "130 GSa/s photonic analog-to-digital converter with time stretch preprocessor," IEEE Photon. Technol. Lett. 14, 684-686 (2002).

IEEE Trans. Aerosp. Electron. Syst. (1)

W. J. Caputi, "Stretch: A time-transformation technique," IEEE Trans. Aerosp. Electron. Syst. AES-7, 269-278 (1971).

IEEE Trans. Microw. Theory Tech. (3)

P. W. Juodawlkis, J. C. Twichell, G. E. Betts, J. J. Hargreaves, R. D. Younger, J. L. Wasserman, F. J. O'Donnell, K. G. Ray, R. C. Williamson, "Optically sampled analog-to-digital converters," IEEE Trans. Microw. Theory Tech. 49, 1840-1853 (2001).

F. Coppinger, A. S. Bhushan, B. Jalali, "Photonic time stretch and its application to analog-to-digital conversion," IEEE Trans. Microw. Theory Tech. 47, 1309-1314 (1999).

Y. Han, O. Boyraz, B. Jalali, "Ultrawide-band photonic time-stretch A/D converter employing phase diversity," IEEE Trans. Microw. Theory Tech. 53, 1404-1408 (2005).

J. Lightw. Technol. (1)

Y. Han, B. Jalali, "Photonic time-stretched analog-to-digital converter: Fundamental concepts and practical considerations," J. Lightw. Technol. 21, 3085-3103 (2003).

Other (4)

O. Boyraz, J. Kim, M. N. Islam, F. Coppinger, B. Jalali, "Broadband, high-brightness 10-Gb/s supercontinuum source for A/D conversion," Proc. Lasers Electro-Opt. Conf. (2000) pp. 489-490.

B. Jalali, F. Coppinger, Data conversion using time manipulation U.S. Patent 6 288 659 (2001).

A. H. Sayed, Fundamentals of Adaptive Filtering (Wiley, 2003).

Analog Devices Engineering StaffData Conversion Handbook New YorkElsevier (Elsevier, 2005).

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