Fundamental mode lasers with broad spectral emission will play an important role in laser projection techniques. The use of conventional single—mode fibers for such applications is limited by the wavelength dependence of their characteristics, i.e. mode radius, angle of divergence, and attenuation. Single—mode fibers with achromatic properties are thus required and we will describe two types, where either the mode radius or the angle of divergence is independent of the wavelength.
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Ulrich G. Fotheringham, Hans J. Hoffmann, Noboru Kobayashi, Kurt Nattermann, "Design considerations for achromatic single-mode fibers," Proc. SPIE 1580, Fiber Optic Components and Reliability, (1 February 1992);