[1] UNIV ERLANGEN NURNBERG, INST PHYS, W-8520 ERLANGEN, GERMANY
[2] UNIV COLORADO, CTR OPTOELECTR COMP SYST, BOULDER, CO 80309 USA
[3] UNIV ALABAMA, CTR APPL OPT, HUNTSVILLE, AL 35899 USA
[4] UNIV CALIF SAN DIEGO, DEPT ELECT & COMP ENGN, LA JOLLA, CA 92093 USA
[5] USN, RES LAB, WASHINGTON, DC 20375 USA