www.st-andrews.ac.uk/~qinfo title fiber-optical analogue of the event horizon experiment: friedrich...
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Title
Fiber-optical analogue of the event horizon
Experiment:
Friedrich König
Christopher Kuklewicz
Stephen Hill
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Theory:
Ulf Leonhardt
Thomas Philbin
Scott Robertson
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Contents
Frequency shifts at event horizons
Experimental observation of frequency shifts at event horizons
The analogue Hawking effect in fibers
Introduction
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Horizons in moving media
Illustration: Peter Hoey, Science 319, 1321 (2008)
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Hydraulic jump
Photo: Piotr Pieranski
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Time reversal
Illustration: Scientific American
W. G. Unruh, Phys. Rev. Lett. 46, 1351 (1981)
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Time reversal
White hole analogue Black hole analogue
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Hawking radiation: connections
• Analogue systems are key to the observation of Hawking-type radiation
• Optical analogues possible?
S. M. Hawking, Nature 248, 30 (1974)
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Horizons in moving media
P = z-u t
Probe light ‘sees’ a moving medium of index dn inside a medium of index n
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Horizons in moving media: trajectories
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Horizons in moving media: trajectories
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Choice of medium: optical fiber
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Fiber optical horizons: requirements
• Stable pulses -> solitons• Narrowband probe light at a frequency different from soliton• Highly nonlinear fiber
Pulse trapping:N. Nishizawa et al., Opt. Lett. 27, 152 (2002)A. Efimov et al., Phys. Rev. Lett., 95 ,213902, (2005)A. V. Gorbach et al., Nature Photonics 1, 653 (2007)
Optical Pushbroom:C. N. de Sterke, Opt. Lett. 17, 914 (1992)N. G. R. Broderick et al. Phys. Rev. Lett., 79, 4566 (1997)
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Fiber properties and group velocity
Fiber NLPM 750 B
Measurements by:A. Podlipensky and P. Russell, Erlangen, Germany (dotted line)Crystal Fiber A/S (red line)
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Artificial horizons: experimental apparatus
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Blue shifting at the white hole
Th. Philbin, Ch. Kuklewicz, S. Robertson, S. Hill, F. König, U. Leonhardt Science 319, 5868, pp. 1367 – 1370 (2008)
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Hawking radiation: outlook
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Hawking radiation: few-cycle pulses
Few-cycle pulses from modelocked lasers undergo self-steepening inside the fiber:
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Summary
Optical pulses in fibers form media moving at the speed of light.
At turning points analogue event horizons are formed that lead to frequency shifts.
This system is promising for the generation of the analogue of Hawking radiation.
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Thank you!
For more information:[email protected]
or go to www.st-andrews.ac.uk/~qinfoor google for black hole and fiber
FK