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Title: Variable optical delay line using discrete harmonic oscillation in waveguide lattices
Authors: Li, T
Chen, Q
Xiao, Y
Zhang, X 
Issue Date: 15-Dec-2015
Source: Journal of lightwave technology, 15 Dec. 2015, v. 33, no. 24, 7273744, p. 5095-5102
Abstract: This paper proposes a variable optical delay line based on the discrete harmonic oscillation in the waveguide lattice with a quadratic distribution of coupling coefficients. Theoretical analysis and numerical simulation have shown that the device design can achieve a time delay of up to 10 ns, with the resolution of 0.5 ns, and the 3-dB bandwidth over the whole C-band. It allows a data packet of up to 17 bits at the rate of 100 Gb/s. In this design, the propagation path is folded by up to five times (or ten times for the one-port design). Compared with the conventional fiber-delay-line buffer, this design has a small footprint (about 10 mm × 0.5 mm). A group of them can be paralleled and cascaded within a small area (e.g., 20 copies into 1 cm2) as enabled by the microfabrication. With further optimization, this design has a potential for interconnecting and signal processing applications in optical communications and computing.
Keywords: Optical buffers
Optical computing
Optical delay lines
Optical planar waveguide components
Optical propagation in anisotropic media
Publisher: Institute of Electrical and Electronics Engineers
Journal: Journal of lightwave technology 
ISSN: 0733-8724
EISSN: 1558-2213
DOI: 10.1109/JLT.2015.2480542
Rights: © 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
The following publication T. Li, Q. Chen, Y. Xiao and X. Zhang, "Variable Optical Delay Line Using Discrete Harmonic Oscillation in Waveguide Lattices," in Journal of Lightwave Technology, vol. 33, no. 24, pp. 5095-5102, 15 Dec.15, 2015 is available at
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