Number 151 (Story #3), November 15, 1993 by Phillip F. Schewe and Ben Stein A SELF-FOCUSING LASER has been developed at AT&T Bell Labs. The layered semiconductor device is patterned on top with a set of micron-sized concentric grooves, which constitute a sort of Fresnel lens. Infrared laser light, emitted from this top face, is focused to an 8- micron spot size. Daryoosh Vakhshoori of Bell Labs believes this "zone laser" will promote a better coupling of laser light into external optical fibers. (Science News, 6 Nov. 1993.)