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Magnetostrictive Micro Mirrors for an Optical Switch Matrix.

Heung-Shik Lee1, Chongdu Cho2, Myeong-Woo Cho3

  • 1Department of Mechanical Engineering, Inha University, Incheon 402-751, Korea. jsheung@dreamwiz.com.

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Summary
This summary is machine-generated.

We created a compact optical switch using silicon micromachining and a TbDyFe magnetic film. This wireless-controlled device uses micro-mirrors actuated by magnetic fields to redirect light beams.

Keywords:
Optical switchTbDyFemagnetostrictive mirrormicromachining.

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Area of Science:

  • Optoelectronics
  • Materials Science
  • MEMS

Background:

  • Optical switches are crucial for telecommunications and integrated photonics.
  • Existing technologies often face limitations in size, control, or power consumption.

Purpose of the Study:

  • To develop a novel wireless-controlled compact optical switch.
  • To investigate the use of TbDyFe films for magnetic actuation in micro-optical systems.

Main Methods:

  • Silicon micromachining techniques were employed to fabricate micro-mirrors (5mm×800μm×50μm).
  • Terbium-Dysprosium-Iron (TbDyFe) films were sputter-deposited onto cantilever micro-mirrors under specific conditions (Ar pressure < 1.2×10⁻⁹ torr, 180W DC power, 250°C).
  • Wireless control was achieved by actuating mirrors with externally applied magnetic fields.

Main Results:

  • The fabricated micro-mirrors demonstrated deflection controllable by the direction and magnitude of the applied magnetic field.
  • Measurements of reflectivity, M-H curves, and X-ray diffractions characterized the magneto-optical and magneto-elastic properties of the TbDyFe films.
  • The deflected angle-magnetic field characteristics were successfully measured.

Conclusions:

  • A functional wireless-controlled compact optical switch was successfully developed.
  • The study validates the potential of TbDyFe films for magnetic actuation in micro-electro-mechanical systems (MEMS) optical switches.
  • The device offers a promising approach for reconfigurable optical path management.