Jaggard, Dwight L. and Elachi, Charles (1977) Higher-order Bragg coupling in periodic media with gain or loss. Journal of Applied Physics, 48 (4). pp. 1461-1466. ISSN 0021-8979. http://resolver.caltech.edu/CaltechAUTHORS:JAGjap77
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We consider wave propagation in longitudinally periodic media with gain or loss. An extended coupled-waves (ECW) approach and Floquet approach are used to study index and gain (or loss) coupling in periodic media at the first few Bragg resonances by the use of Brillouin diagrams. Phase speeding or slowing that is dependent upon the type of coupling occurs in periodic media. Even and odd resonances display different dispersion characteristics. Several examples of coupling due to multiharmonic periodicities are also covered. Coupling or feedback strength can be continuously varied by changing the relative phase of multiharmonic periodicities.
|Additional Information:||Copyright © 1977 American Institute of Physics. Received 1 July 1976. The authors acknowledge the helpful discussions with Professor C.H. Papas (Caltech), the discussions and computational assistance of Dr. G. Evans (RDA) and the editorial assistance of D. Maple (JPL). This paper presents the results of one phase of research carried out at the Jet Propulsion Laboratory, California Institute of Technology, sponsored by the National Aeronautics and Space Administration under Contract NAS7-100 and supported under JPL/Caltech Work Order No. 61483.|
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