Focusing Characteristics of Convex-Shaped Distributed-Index Microlens
- 1 May 1992
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 31 (5S) , 1611
- https://doi.org/10.1143/jjap.31.1611
Abstract
We have investigated the structure and performance of novel convex-shaped distributed-index microlenses. The surface curvature of its convex shape and the index distribution formed in the ion exchange process were measured precisely. Based on the measured structural parameters, focusing characteristics were evaluated by the ray tracing simulation. It was confirmed that 93% of its large numerical aperture (∼0.5) is attributed to the convex shape. The focusing characteristics show that laser light is directly focused to a 10 µmφ circular spot with 4 dB coupling loss, which is compatible with single-mode fibers.Keywords
This publication has 8 references indexed in Scilit:
- High numerical aperture planar microlens with swelled structureApplied Optics, 1990
- Technique for monolithic fabrication of microlens arraysApplied Optics, 1988
- Distributed-index planar microlens and stacked planar optics: a review of progressApplied Optics, 1986
- Photolytic technique for producing microlenses in photosensitive glassApplied Optics, 1985
- Wave Aberration Testing System for Micro-Lenses by Shearing Interference MethodJapanese Journal of Applied Physics, 1984
- Array of Distributed-Index Planar Micro-Lenses Prepared from Ion Exchange TechniqueJapanese Journal of Applied Physics, 1981
- A Distributed-Index Planar Micro-Lens Made of PlasticsJapanese Journal of Applied Physics, 1981
- Light coupling from a stripe-geometry GaAs diode laser into an optical fiber with spherical endJournal of Applied Physics, 1973