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Compensating Multimode Fiber Dispersion Using Adaptive Optics. Joseph M. Kahn. Stanford University Department of Electrical Engineering www-ee.stanford.edu/~jmk. Acknowledgments. Collaborators J. P. Wilde S. P. Boyd S. Fan M. A. Horowitz I. Lyubomirsky (Infinera Corporation) - PowerPoint PPT Presentation
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Compensating Multimode Fiber Dispersion Using
Adaptive Optics
Joseph M. Kahn
Stanford University
Department of Electrical
Engineering
www-ee.stanford.edu/~jmk
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AcknowledgmentsAcknowledgments
Collaborators J. P. Wilde S. P. Boyd S. Fan M. A. Horowitz I. Lyubomirsky (Infinera Corporation) D. F. Welch (Infinera Corporation)
Graduate Students R. A. Panicker M. Bagher Shemirani X. Shen E. Alon (now at UC Berkeley) V. Stojanovic (now at MIT)
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Modal Dispersion Compensation Using Adaptive OpticsModal Dispersion Compensation Using Adaptive Optics
Spatial LightModulator
Multimode Fiber
OOKModulator
AdaptiveAlgorithm
Fourier Lens
Iin(t)
Trans.Data
Transmitter
Low-Rate Feedback Channel
Photo-Detector
Clock & DataRecovery
ISIEstimation
Rec.Data
ISI ObjectiveFunction
Receiver
Iout(t)
0.30.10.40.8
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10 Gb/s ErrorDetector
SamplingOscilloscope
10 Gb/s PatternGenerator
1550 nmTunable Laser
PersonalComputer
PM SMFNA = 0.11
50 m GRIN MMFup to 11.1 km long
f = 10.4 mm
f = 10.4 mm
50 m GRIN MMFNA = 0.19
45-45
/2plate
NematicLiquid Crystal
SLMPhase-Only 256 256
/2plate
/4plate
Enclosure
62 m GRINMMF
SLMDriver
10 Gb/s ErrorDetector
SamplingOscilloscope
10 Gb/s PatternGenerator
1550 nmTunable Laser
PersonalComputer
PM SMFNA = 0.11
50 m GRIN MMFup to 11.1 km long
f = 10.4 mm
f = 10.4 mm
50 m GRIN MMFNA = 0.19
45-45
/2plate
NematicLiquid Crystal
SLMPhase-Only 256 256
/2plate
/4plate
Enclosure
62 m GRINMMF
SLMDriver
Experimental SetupExperimental Setup
50 m GRIN MMFup to 11.1 km long
f = 10.4 mm
f = 10.4 mm
50 m GRIN MMFNA = 0.19
45-45
/2plate
NematicLiquid Crystal
SLMPhase-Only 256 256
/2plate
/4plate
Enclosure
50 m GRIN MMFup to 11.1 km long
f = 10.4 mm
f = 10.4 mm
50 m GRIN MMFNA = 0.19
45-45
/2plate
NematicLiquid Crystal
SLMPhase-Only 256 256
/2plate
/4plate
Enclosure
50 m GRIN MMFup to 11.1 km long
f = 10.4 mm
f = 10.4 mm
50 m GRIN MMFNA = 0.19
45-45
/2plate
NematicLiquid Crystal
SLMPhase-Only 256 256
/2plate
/4plate
Enclosure
X. Shen, J. M. Kahn and M. A. Horowitz, Optics Letters, vol. 30, no. 22, pp. 2985-2987, Nov. 15, 2005.
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11 km, Worst SOP, 10 11 km, Worst SOP, 10 m Offset Launch,m Offset Launch,Before AdaptationBefore Adaptation
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11 km, Worst SOP, 10 11 km, Worst SOP, 10 m Offset Launch,m Offset Launch,One Iteration Using Step Training SequenceOne Iteration Using Step Training Sequence
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11 km, Worst SOP, 10 11 km, Worst SOP, 10 m Offset Launch,m Offset Launch,After One Iteration Using Step Training SequenceAfter One Iteration Using Step Training Sequence
