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Chalcogenide-glass microlenses attached to optical-fiber end surfaces

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Abstract

Convex microlenses of As2S3 glass have been fabricated on oxide-glass fiber ends by use of a photolithographic technique. As2S3 film evaporated on the end surface of an optical fiber is exposed to light through the opposite end surface, and the film etching is observed under a microscope. This process produces a lens that is automatically positioned on the fiber core. The As2S3 film possesses a high refractive index, which is favorable for production of microlenses with short focal lengths of 10 µm.

© 2000 Optical Society of America

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