Abstract

We demonstrate an improved chromatic dispersion monitoring technique using a single RF monitoring tone. Compared to conventional techniques using a single RF monitoring tone, our proposed technique is able to monitor the sign of the residual dispersion and doubles the monitoring range. Our proposed technique utilizes the RF fading caused by chromatic dispersion and a two-detector dispersion monitor setup, where a dispersion offset is inserted before one of the detectors. The observed monitoring error is less than ±35 ps/nm over a 1300 ps/nm monitoring range. A small power penalty less than 0.5 dB is observed due to the addition of the RF monitoring tone. Our technique is more than twice as accurate as the conventional technique.

© 2006 Optical Society of America

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References

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  1. G. Rossi, T. E. Dimmick, and D. J. Blumenthal, "Optical performance monitoring in reconfigurable wdm optical networks using subcarrier multiplexing," J. Lightwave Technol. 18, 1639-1648 (2000).
    [CrossRef]
  2. M. N. Petersen, Z. Pan, S. Lee, S. A. Havstad, and A. E. Willner, "Online chromatic dispersion monitoring and compensation using a single inband subcarrier tone," IEEE Photo. Technol. Lett. 14, 570-572 (2002).
    [CrossRef]
  3. K. J. Park, C. J. Youn, J. H. Lee, and Y. C. Chung, "Chromatic dispersion monitoring technique in wdm network," OFC (Optical Society of America, Washington, D.C., 2002) 735-737.
  4. Y. Wang, Z. Pan, A. Sahin, L. Yan, C. Yu, and A. E. Willner, "In-line chromatic dispersion monitoring using optically-added phase modulated inband tones for 10 gb/s system," OFC (Optical Society of America, Washington, D.C., 2003) 1, 404-406.
  5. Q. Yu, Z. Pan, L. S. Yan, and A. E. Willner, "Chromatic dispersion monitoring technique using sideband optical filtering and clock phaseshift detection," J. Lightwave Technol. 20, 2267-2271 (2002).
    [CrossRef]
  6. S. M. R. M. Nezam, J. E. McGeehan, and A. E. Willner, "Chromatic dispersion monitoring using partial optical filtering and phase-shift detection of bit rate and doubled half bit rate frequency components," OFC (Optical Society of America, Washington, D.C., 2004) 2, ThU2.
  7. S. M. R. M. Nezam, T. Luo, J. E. McGeehan, and A. E. Willner, "Enhancing the monitoring range and sensitivity in csrz chromatic dispersion monitors using a dispersion-biased rf clock tone,"IEEE Photo. Technol. Lett. 16, 1391-1393 (2004).
    [CrossRef]
  8. Z. Pan, Q. Yu, Y. Xie, S. A. Havstad, A. E. Willner, D. S. Starodubov, and J. Feinberg, "Chromatic dispersion monitoring and automated compensation for nrz and rz data using clock regeneration and fading without adding signaling," OFC (Optical Society of America, Washington, D.C., 2001) 3, WH5-1 -WH5-3.
  9. N. Liu,W.-D. Zhong, X. Yi, Y. Wang, and C. Lu, "Chromatic dispersion monitoring using the power ratio of two rf tones with a dispersion offset," OFC (Optical Society of America, Washington, D.C., 2004) 1, MF81.

2004 (1)

S. M. R. M. Nezam, T. Luo, J. E. McGeehan, and A. E. Willner, "Enhancing the monitoring range and sensitivity in csrz chromatic dispersion monitors using a dispersion-biased rf clock tone,"IEEE Photo. Technol. Lett. 16, 1391-1393 (2004).
[CrossRef]

2002 (2)

M. N. Petersen, Z. Pan, S. Lee, S. A. Havstad, and A. E. Willner, "Online chromatic dispersion monitoring and compensation using a single inband subcarrier tone," IEEE Photo. Technol. Lett. 14, 570-572 (2002).
[CrossRef]

Q. Yu, Z. Pan, L. S. Yan, and A. E. Willner, "Chromatic dispersion monitoring technique using sideband optical filtering and clock phaseshift detection," J. Lightwave Technol. 20, 2267-2271 (2002).
[CrossRef]

2000 (1)

Blumenthal, D. J.

Dimmick, T. E.

Havstad, S. A.

M. N. Petersen, Z. Pan, S. Lee, S. A. Havstad, and A. E. Willner, "Online chromatic dispersion monitoring and compensation using a single inband subcarrier tone," IEEE Photo. Technol. Lett. 14, 570-572 (2002).
[CrossRef]

Lee, S.

M. N. Petersen, Z. Pan, S. Lee, S. A. Havstad, and A. E. Willner, "Online chromatic dispersion monitoring and compensation using a single inband subcarrier tone," IEEE Photo. Technol. Lett. 14, 570-572 (2002).
[CrossRef]

Luo, T.

S. M. R. M. Nezam, T. Luo, J. E. McGeehan, and A. E. Willner, "Enhancing the monitoring range and sensitivity in csrz chromatic dispersion monitors using a dispersion-biased rf clock tone,"IEEE Photo. Technol. Lett. 16, 1391-1393 (2004).
[CrossRef]

McGeehan, J. E.

S. M. R. M. Nezam, T. Luo, J. E. McGeehan, and A. E. Willner, "Enhancing the monitoring range and sensitivity in csrz chromatic dispersion monitors using a dispersion-biased rf clock tone,"IEEE Photo. Technol. Lett. 16, 1391-1393 (2004).
[CrossRef]

Nezam, S. M. R. M.

S. M. R. M. Nezam, T. Luo, J. E. McGeehan, and A. E. Willner, "Enhancing the monitoring range and sensitivity in csrz chromatic dispersion monitors using a dispersion-biased rf clock tone,"IEEE Photo. Technol. Lett. 16, 1391-1393 (2004).
[CrossRef]

Pan, Z.

M. N. Petersen, Z. Pan, S. Lee, S. A. Havstad, and A. E. Willner, "Online chromatic dispersion monitoring and compensation using a single inband subcarrier tone," IEEE Photo. Technol. Lett. 14, 570-572 (2002).
[CrossRef]

Q. Yu, Z. Pan, L. S. Yan, and A. E. Willner, "Chromatic dispersion monitoring technique using sideband optical filtering and clock phaseshift detection," J. Lightwave Technol. 20, 2267-2271 (2002).
[CrossRef]

Petersen, M. N.

M. N. Petersen, Z. Pan, S. Lee, S. A. Havstad, and A. E. Willner, "Online chromatic dispersion monitoring and compensation using a single inband subcarrier tone," IEEE Photo. Technol. Lett. 14, 570-572 (2002).
[CrossRef]

Rossi, G.

Willner, A. E.

S. M. R. M. Nezam, T. Luo, J. E. McGeehan, and A. E. Willner, "Enhancing the monitoring range and sensitivity in csrz chromatic dispersion monitors using a dispersion-biased rf clock tone,"IEEE Photo. Technol. Lett. 16, 1391-1393 (2004).
[CrossRef]

M. N. Petersen, Z. Pan, S. Lee, S. A. Havstad, and A. E. Willner, "Online chromatic dispersion monitoring and compensation using a single inband subcarrier tone," IEEE Photo. Technol. Lett. 14, 570-572 (2002).
[CrossRef]

Q. Yu, Z. Pan, L. S. Yan, and A. E. Willner, "Chromatic dispersion monitoring technique using sideband optical filtering and clock phaseshift detection," J. Lightwave Technol. 20, 2267-2271 (2002).
[CrossRef]

Yan, L. S.

Yu, Q.

IEEE Photo. Technol. Lett. (2)

M. N. Petersen, Z. Pan, S. Lee, S. A. Havstad, and A. E. Willner, "Online chromatic dispersion monitoring and compensation using a single inband subcarrier tone," IEEE Photo. Technol. Lett. 14, 570-572 (2002).
[CrossRef]

S. M. R. M. Nezam, T. Luo, J. E. McGeehan, and A. E. Willner, "Enhancing the monitoring range and sensitivity in csrz chromatic dispersion monitors using a dispersion-biased rf clock tone,"IEEE Photo. Technol. Lett. 16, 1391-1393 (2004).
[CrossRef]

J. Lightwave Technol. (2)

Other (5)

Z. Pan, Q. Yu, Y. Xie, S. A. Havstad, A. E. Willner, D. S. Starodubov, and J. Feinberg, "Chromatic dispersion monitoring and automated compensation for nrz and rz data using clock regeneration and fading without adding signaling," OFC (Optical Society of America, Washington, D.C., 2001) 3, WH5-1 -WH5-3.

N. Liu,W.-D. Zhong, X. Yi, Y. Wang, and C. Lu, "Chromatic dispersion monitoring using the power ratio of two rf tones with a dispersion offset," OFC (Optical Society of America, Washington, D.C., 2004) 1, MF81.

K. J. Park, C. J. Youn, J. H. Lee, and Y. C. Chung, "Chromatic dispersion monitoring technique in wdm network," OFC (Optical Society of America, Washington, D.C., 2002) 735-737.

Y. Wang, Z. Pan, A. Sahin, L. Yan, C. Yu, and A. E. Willner, "In-line chromatic dispersion monitoring using optically-added phase modulated inband tones for 10 gb/s system," OFC (Optical Society of America, Washington, D.C., 2003) 1, 404-406.

S. M. R. M. Nezam, J. E. McGeehan, and A. E. Willner, "Chromatic dispersion monitoring using partial optical filtering and phase-shift detection of bit rate and doubled half bit rate frequency components," OFC (Optical Society of America, Washington, D.C., 2004) 2, ThU2.

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Figures (4)

Fig. 1.
Fig. 1.

Conceptual diagram of our experimental setup for dispersion monitoring using single in-band RF tone and two detection paths.

Fig. 2.
Fig. 2.

Unambiguous monitoring range for the proposed technique and the conventional technique using a single monitoring tone. The monitoring tone fading characteristics are shown for the path with (dashed curve) and without (solid curve) the dispersion offset.

Fig. 3.
Fig. 3.

(a) RF fading due to dispersion for a 9.8 GHz tone from the two detection paths at the dispersion monitor. The lines are simulation results and the points are experimental results. (b) BER versus Received Optical Power. The solid line represents the back-to-back measurements with no monitoring tone, where the dashed line represents the case of having the 9.8 GHz monitoring tone with the modulator biased below quadrature.

Fig. 4.
Fig. 4.

Normalized monitoring error plotted as a function of the RF modulation depth measurement error.

Equations (6)

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P RF = P 0 A e α L m 2 cos 2 ( π D L λ 2 f R F 2 c )
M RF = P RF P ROP
= M eff 2 cos 2 ( π D L λ 2 f RF 2 c )
D L = c 2 λ 2 f R F 2
M RF offset = M eff 2 cos 2 ( π ( D L + D offset ) λ 2 f RF 2 c )
D L improved = c λ 2 f RF 2

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