Abstract

In previous work, a technique was proposed for compensation of modal dispersion in multimode fiber (MMF) systems by using adaptive optics. A spatial light modulator (SLM), with amplitude and phase adjustable over discrete blocks, was used to control the field launched into a MMF. The system impulse response was found as a function of the SLM settings and the field patterns of the MMF principal modes, which were assumed to be known. Using principles of convex optimization, an optimal solution for the SLM settings was obtained, which minimizes intersymbol interference (ISI) subject to physical constraints. Here, we extend the previous method to include control over launched polarization. We propose five adaptive optics configurations, some permitting control only of overall polarization, and others permitting block-wise polarization control. For each configuration, we find optimal adaptive optics settings, which minimize ISI. We show that the best performance is obtained by two configurations that permit independent block-wise control of amplitude, phase and polarization.

© 2010 IEEE

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2009 (2)

M. B. Shemirani, W. Mao, R. A. Panicker, J. M. Kahn, "Principal modes in graded-index multimode fiber in presence of spatial- and polarization-mode coupling," J. Lightw. Technol. 27, 1248-1261 (2009).

M. B. Shemirani, J. M. Kahn, "Higher-order modal dispersion in graded-index multimode fiber," J. Lightw. Technol. 27, 5461-5468 (2009).

2008 (1)

R. A. Panicker, J. M. Kahn, S. P. Boyd, "Compensation of multimode fiber dispersion using adaptive optics via convex optimization," J. Lightw. Technol. 26, 1295-1305 (2008).

2005 (2)

2003 (1)

H. Wu, J. A. Tierno, P. Pepeljugoski, J. Schaub, S. Gowda, J. A. Kash, A. Hajimiri, "Integrated transversal equalizers in high-speed fiber-optic systems," IEEE J. Solid-State Circuits 38, 2131-2137 (2003).

2002 (1)

X. Zhao, F. S. Choa, "Demonstration of 10-Gb/s transmissions over 1.5-km-long multimode fiber using equalization techniques," IEEE Photon. Technol. Lett. 14, 1187-1189 (2002).

1995 (1)

J. M. Kahn, W. J. Krause, J. B. Carruthers, "Experimental characterization of non-directed indoor infrared channels," IEEE Trans. Commun. 43, 1613-1623 (1995).

1983 (1)

S. C. Rashleigh, "Origins and control of polarization effects in single-mode fibers," J. Lightw. Technol. LT-1, 312-331 (1983).

IEEE J. Solid-State Circuits (1)

H. Wu, J. A. Tierno, P. Pepeljugoski, J. Schaub, S. Gowda, J. A. Kash, A. Hajimiri, "Integrated transversal equalizers in high-speed fiber-optic systems," IEEE J. Solid-State Circuits 38, 2131-2137 (2003).

IEEE Photon. Technol. Lett. (1)

X. Zhao, F. S. Choa, "Demonstration of 10-Gb/s transmissions over 1.5-km-long multimode fiber using equalization techniques," IEEE Photon. Technol. Lett. 14, 1187-1189 (2002).

IEEE Trans. Commun. (1)

J. M. Kahn, W. J. Krause, J. B. Carruthers, "Experimental characterization of non-directed indoor infrared channels," IEEE Trans. Commun. 43, 1613-1623 (1995).

J. Lightw. Technol. (4)

S. C. Rashleigh, "Origins and control of polarization effects in single-mode fibers," J. Lightw. Technol. LT-1, 312-331 (1983).

R. A. Panicker, J. M. Kahn, S. P. Boyd, "Compensation of multimode fiber dispersion using adaptive optics via convex optimization," J. Lightw. Technol. 26, 1295-1305 (2008).

M. B. Shemirani, W. Mao, R. A. Panicker, J. M. Kahn, "Principal modes in graded-index multimode fiber in presence of spatial- and polarization-mode coupling," J. Lightw. Technol. 27, 1248-1261 (2009).

M. B. Shemirani, J. M. Kahn, "Higher-order modal dispersion in graded-index multimode fiber," J. Lightw. Technol. 27, 5461-5468 (2009).

Opt. Lett. (2)

Other (7)

P. L. Neo, J. P. Freeman, T. D. Wilkinson, "Modal control of a 50 $\mu$m core diameter multimode fiber using a spatial light modulator," Proc. OFC/NFOEC (2007) pp. 1-3.

E. Alon, V. Stojanovic, J. M. Kahn, S. P. Boyd, M. A. Horowitz, "Equalization of modal dispersion in multimode fiber using spatial light modulators," Proc. IEEE Global Telecommun. Conf. (2004) pp. 1023-1029.

G. P. Agrawal, Fiber-Optic Communications Systems (Wiley, 2002).

J. Proakis, Digital Communications (McGraw-Hill, 2001).

S. Boyd, L. Vandenberghe, Convex Optimization (Cambridge Univ. Press, 2004).

M. Grant, S. Boyd, Y. Ye, CVX: Matlab Software for Disciplined Convex Programming http://www.stanford.edu/~boyd/cvx [Online]. Available:.

G. H. Golub, C. F. Van Loan, Matrix Computations (John Hopkins Univ. Press, 1983).

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