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Fiber-optic tunable filter with a concave mirror.

Yunhae Yeh1, Se Hoon Park

  • 1School of Electronics and Information, Kyung Hee University and Institute for Laser Engineering, YongIn, KyungKi, South Korea. yhyh@khu.ac.kr

Optics Letters
|February 21, 2012
PubMed
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A novel fiber-optic tunable filter uses a concave mirror fabricated on the optical fiber end. This simple, self-aligned design results in a compact, reliable, and fast tunable filter.

Area of Science:

  • Photonics and Optical Engineering
  • Materials Science

Background:

  • Fabry-Perot filters are crucial optical components.
  • Traditional implementations can be complex and bulky.
  • Need for miniaturized and easily aligned optical filters.

Purpose of the Study:

  • To develop a simple, compact, and self-aligned fiber-optic Fabry-Perot tunable filter.
  • To demonstrate a novel fabrication method for integrated optical filters.

Main Methods:

  • Fabrication of a concave mirror at the optical fiber end using a polycarbonate film and a fiber ball.
  • Deposition of a multilayer dielectric mirror onto the formed concave surface.
  • Utilizing the self-alignment property of the fiber core and concave mirror for cavity alignment.

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Main Results:

  • Successfully implemented a fiber-optic Fabry-Perot tunable filter with a simplified configuration.
  • The self-alignment feature simplifies the cavity alignment process.
  • Demonstrated the potential for fabricating small, reliable, and fast tunable filters.

Conclusions:

  • The proposed method offers a straightforward approach to fabricating fiber-optic tunable filters.
  • The self-aligning concave mirror design significantly enhances ease of assembly and performance.
  • This technology enables the development of next-generation compact optical sensing and communication devices.