It is well known that severe tolerance requirements exist for the coupling of single-mode fibers to other optical components such as semiconductor lasers, LEDs, or integrated optic components. Especially for the coupling of a taper- lensed single-mode fiber to a laser diode,1 the lateral tolerances are between 0.2 and 0.5 μm. Various fixing techniques have been proposed.2 The main requirements in addition to small displacements are rapid processing, a small temperature increase during processing, and good thermal and mechanical stability. To meet these requirements we investigated two fixing techniques: resistance welding and laser welding.

© 1987 Optical Society of America

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