McCaughan, Leon

M. Bhardwaj, L. McCaughan, S. K. Korotky, ”Simulation and modeling of the restoration time for path based restoration schemes in planar mesh networks,” accepted for publication in the Journal of Optical Networking (2006). VIEW PDF.

M. Bhardwaj, L. McCaughan, S. K. Korotky, I. Saniee, “Analytical description of shared restoration capacity for mesh networks,” Journal of Optical Networking, 4, 130 (2005). VIEW PDF.

V. Joshkin, K. Dovidenko, S. Oktyabrsky, D. Saulys, T. Kuech, and L.McCaughan, “New Methods for Fabricating Patterned Lithium Niobate for Photonic Applications,” J. Crystal Growth, 259, 273 (2003). VIEW PDF.

A. Chowdhury, C. Staus, B. F. Boland, T. F. Kuech and L. McCaughan, “Experimental Demonstration of 1535-1555 nm Simultaneous Optical Wavelength Interchange with a Nonlinear Photonic Crystal, Opt. Lett., 26, 1353 (2001). VIEW PDF.

D. Saulys, V. Joshkin, M. Khoudiakov, T. F. Kuech, A. B. Ellis, and L. McCaughan, “An Examination of the Surface Decomposition Chemistry of Lithium Niobate Precursors under High Vacuum Conditions,” J. Crystal Growth, 217, 287 (2000). VIEW PDF.

S. Jaloviar, Jia-Ling Lin, Feng Liu, V. Zielasek, L. McCaughan, and M. Lagally, "Step-induced Optical Anisotropy of Vicinal Si(001)," Phys. Rev. Letters, 82, 791-794 (1999). VIEW PDF.

D. Gill, J.C. Wright, and L. McCaughan, "Site characterization of rare-earth doped LiNbO3 using total site selective spectroscopy," Appl. Phys. Lett., 64, 2483 (1994). VIEW PDF.

K.D. Choquette, D.K. Misemer, and L. McCaughan, "Electronic Structure of Short-period n-p GaAs Doping Superlattices," Phys. Rev. B, 43, 7040 (1991). VIEW PDF.

L. McCaughan, N. Agrawal, and G.A. Bogert, "Novel Physical Effects in Intersecting Waveguides," Appl. Phys. Lett., 51, 1389 (1987). VIEW PDF.

L. McCaughan and S. Krimm, "X-ray and Neutron Scattering Density Profiles of the Intact Human Red Blood Cell Membrane," Science, 207, 1481 (1980).

For a complete list of publications and patents see my extended homepage.

Selected Awards, Honors and Societies

Associate Editor, Optics Letters (’95-’01)
Fellow, Optical Society of America
Young Faculty Award, AT&T Foundation
First optical switch array; named as "top 100" inventions by Science Digest (’85).
Newport Research Corporation Award
Non-tenured Faculty Award, 3M Company
GTE Faculty Grant

Teaching

Departmental

Fundamental of Photonics (ECE 434)
Fiber Optics Communication Systems (ECE 535)
Fiber Optics & Optoelectronics Laboratory (ECE 313)
Lasers (ECE 546)
Laser Laboratory (ECE 314)
Special Topics: Nonlinear Optics (ECE 913)
Electronics of Solids (ECE 466)
Circuit Analysis (ECE 230)
Solid State Microelectronics (ECE 335)
Electrodynamics (ECE 320)

Short Courses

"Integrated Optics," Optical Fiber Conference (’95 – present).
"Integrated Optics," European Conference on Optical Communication.
"Design of Fiber Optic Communication Systems," University of Wisconsin (‘88-present).
"Advanced Integrated Optic Devices," SPIE, OE/LASE.

Summary

One of our research efforts is devoted to developing artificial structures for nonlinear optical processes. One of the most promising appears to be 2-D lattices of nonlinear optical materials (so-called nonlnear photonic crystals). One of our goals is non-resonant all-optical functions for optical communications systems (e.g., time and/or wavelength optical multiplexing). A second takes advantage of these nonlinearities to produce entangled pairs of photons, typically by way of spontaneous parametric downconversion. Applications include quantum teleportation and keyless cryptography for optical communications systems. The nonlinear process of difference frequency mixing is being employed in our lab to generate strong, tunable, coherent far infrared (aka THz) radiation for bioclinical applications.

We are constructing a chemical vapor deposition (CVD) reactor for growing ferroelectric films engineered for larger non-resonant optical nonlinearities. Fundamental chemical beam epitaxy experiments, which helped us identify a source of the low growth rate common to these oxides, have led us to design new precursors. Because of the extreme inertness of these oxides, a new technique for photolithographic patterning is being developed. Patterning methods are essential tools for the fabrication photonic and guided wave circuits, such as optical amplifiers, modulators, and wavelength translators.

Such guided wave and photonic devices and circuits are envisioned to form the interconnecting nodes in future fiber optic networks. As these networks evolve from a point-to-point communications toward two dimensional mesh topologies, new capacity provisioning and restoration schemes need to be developed. The choice of schemes will greatly impact photonic circuit requirements, and vice versa. Analysis of these requirements and protocols is typically performed by computer simulation, which is slow for large networks (thus limiting the number of variants which can be tested) and provides no general guidelines for optimizationof network performance parameters. To remedy this situation, we have begun by deriving analytic relations which describe performance attributes such as required restoration capacity and elapsed times for restoration as a function of network parameters.

Journal of Optical Networking and Optics Letters papers are made available with the permission of the Optical Society of America. The papers can be found on the OSA website. The American Institute of Physics owns the copyright for Applied Physics Letters papers. The articles may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The articles may be found on the AIP website. Most browsers can open PDF files, but if you need a free PDF viewer, please visit the Adobe Reader webpage. These documents contain content that is not readable with screen readers.

Copyright 2006 The Board of Regents of the University of Wisconsin System
Date last modified: 02-Nov-2006
Content by: mccaughan@engr.wisc.edu
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