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Applied Optics

Applied Optics


  • Vol. 43, Iss. 32 — Nov. 10, 2004
  • pp: 5939–5946

Technique of microball lens formation for efficient optical coupling

Cheng-Tang Pan, Chi-Hui Chien, and Chi-Chang Hsieh  »View Author Affiliations

Applied Optics, Vol. 43, Issue 32, pp. 5939-5946 (2004)

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A batch-fabricated microball lens array not only provides accurate coupling distances but also replaces traditional components such as aspheric lenses and expensive graded-index lenses without sacrificing performance and reduces assembly cost. The results of extensive experiments show a critical aspect ratio of ∼0.3. That is, when the aspect ratio is larger than 0.3, the final shape of a reflowed lens changes to that of a microball rather than of a mushroom. Using a laser with a 633-nm wavelength yields an optimum coupling distance of ∼8 μm with an insertion loss below -1.3 dB (coupling efficiency, ∼73%).

© 2004 Optical Society of America

OCIS Codes
(120.4610) Instrumentation, measurement, and metrology : Optical fabrication
(140.7240) Lasers and laser optics : UV, EUV, and X-ray lasers
(220.3630) Optical design and fabrication : Lenses

Original Manuscript: February 4, 2004
Revised Manuscript: June 18, 2004
Published: November 10, 2004

Cheng-Tang Pan, Chi-Hui Chien, and Chi-Chang Hsieh, "Technique of microball lens formation for efficient optical coupling," Appl. Opt. 43, 5939-5946 (2004)

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