NDLI: Slow-light optical buffers: capabilities and fundamental limitations

Content Provider	IEEE Xplore Digital Library
Author	Tucker, R.S. Pei-Cheng Ku Chang-Hasnain, C.J.
Copyright Year	1983
Abstract	This paper presents an analysis of optical buffers based on slow-light optical delay lines. The focus of this paper is on slow-light delay lines in which the group velocity is reduced using linear processes, including electromagnetically induced transparency (EIT), population oscillations (POs), and microresonator-based photonic-crystal (PC) filters. We also consider slow-light delay lines in which the group velocity is reduced by an adiabatic process of bandwidth compression. A framework is developed for comparing these techniques and identifying fundamental physical limitations of linear slow-light technologies. It is shown that slow-light delay lines have limited capacity and delay-bandwidth product. In principle, the group velocity in slow-light delay lines can be made to approach zero. But very slow group velocity always comes at the cost of very low bandwidth or throughput. In many applications, miniaturization of the delay line is an important consideration. For all delay-line buffers, the minimum physical size of the buffer for a given number of buffered data bits is ultimately limited by the physical size of each stored bit. We show that in slow-light optical buffers, the minimum achievable size of 1 b is approximately equal to the wavelength of light in the buffer. We also compare the capabilities and limitations of a range of delay-line buffers, investigate the impact of waveguide losses on the buffer capacity, and look at the applicability of slow-light delay lines in a number of applications.
Sponsorship	IEEE Lasers and Electro-Optics Society Optical Society of America
Starting Page	4046
Ending Page	4066
Page Count	21
File Size	522868
File Format	PDF
ISSN	07338724
Volume Number	23
Issue Number	12
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-12-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Optical buffering Delay lines Buffer storage Optical filters Bandwidth Optical waveguides Nonlinear filters Costs Throughput Propagation delay slow light Electromagnetically induced transparency (EIT) optical delay lines optical memories optical propagation in dispersive media photonic crystals (PCs)
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics

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