A wide-range linearly tunable optical filter using Lorentz force

Hyung Kew Lee, Kyu Sang Kim, Euisik Yoon

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


In this letter, we have proposed and demonstrated, for the first time, the application of low-voltage magnetic actuation to a tunable optical filter to achieve a wide linear tuning range. We have fabricated and tested three different types of spring structures: straight, corrugated, and meander types to optimize the proposed magnetic actuation for high linearity and low power consumption. From the fabricated actuator, we have acquired a wide linear tuning range over 200 nm in wavelength, which is the widest ever reported to the best of our knowledge. The fabricated tunable filter has demonstrated a maximum static power consumption of less than 25 μW for wavelength tuning up to 200 nm with an external magnetic field of 0.28 T.

Original languageEnglish
Pages (from-to)2087-2089
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number9
Publication statusPublished - 2004 Sep

Bibliographical note

Funding Information:
Manuscript received April 6, 2004; revised May 27, 2004. This work was supported by the National Research Laboratory program of the Ministry of Science and Technology of Korea. H.-K. Lee and E. Yoon are with the Department of Electrical Engineering and Computer Science, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, Korea (e-mail: esyoon@ee.kaist.ac.kr). K.-S. Kim is with Microsystem Research Center, P&I Laboratory, Tokyo Institute of Technology, Yokohama 226-8503, Japan. Digital Object Identifier 10.1109/LPT.2004.833068 Fig. 1. Conceptual diagram of the proposed tunable optical filter using magnetic actuation and three types of springs tested for linear displacement: (a) straight bar; (b) corrugation; and (c) meander-type springs.

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering


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