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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 47, Iss. 34 — Dec. 1, 2008
  • pp: 6345–6349

Single-mode fiber with a plano–convex silicon microlens for an integrated butt-coupling scheme

Kazuo Shiraishi, Makoto Kagaya, Koichi Muro, Hidehiko Yoda, Yoshinori Kogami, and Chen S. Tsai  »View Author Affiliations

Applied Optics, Vol. 47, Issue 34, pp. 6345-6349 (2008)

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A single-mode fiber with plano–convex silicon microlens is proposed for butt-coupling between single-mode fibers and high-index-contrast waveguides with fine mode-field diameter. The lensed fiber has two specific features, high focusing power, and null working distance. The theoretical focus-spot diameter at the endface of the lensed fiber is calculated to be as small as 0.56 μm at a wavelength 1.55 μm . A simple fabrication method for the lensed fiber employing chemical etching and rf-sputtering is presented. Experiments showed that the mode-field-diameter of a single-mode fiber was successfully contracted from 10.5 to 1.3 μm with the lensed fiber.

© 2008 Optical Society of America

OCIS Codes
(060.2310) Fiber optics and optical communications : Fiber optics
(060.2330) Fiber optics and optical communications : Fiber optics communications
(060.2340) Fiber optics and optical communications : Fiber optics components
(060.2430) Fiber optics and optical communications : Fibers, single-mode
(230.3990) Optical devices : Micro-optical devices
(350.3950) Other areas of optics : Micro-optics

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: July 15, 2008
Revised Manuscript: October 13, 2008
Manuscript Accepted: October 24, 2008
Published: November 21, 2008

Kazuo Shiraishi, Makoto Kagaya, Koichi Muro, Hidehiko Yoda, Yoshinori Kogami, and Chen S. Tsai, "Single-mode fiber with a plano-convex silicon microlens for an integrated butt-coupling scheme," Appl. Opt. 47, 6345-6349 (2008)

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