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Related Experiment Videos

Variable bandwidth of dynamic add-drop filters based on coupling-controlled microdisk resonators.

Ming-Chang M Lee1, Ming C Wu

  • 1Institute of Photonics Technologies, National Tsing Hua University, Hsinchu 30055, Taiwan. mclee@ee.nthu.edu.tw

Optics Letters
|August 2, 2006
PubMed
Summary

Microelectromechanical-system (MEMS) actuated microdisk resonators enable dynamic add-drop filters with tunable bandwidth for the first time. This technology offers wavelength switching and variable bandwidth control using MEMS actuators.

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Area of Science:

  • Photonics
  • Microelectromechanical Systems (MEMS)
  • Optical Filtering

Background:

  • Microdisk resonators are key components in photonic integrated circuits.
  • Achieving dynamic tunability in optical filters is crucial for advanced communication systems.
  • Existing add-drop filters often lack variable bandwidth capabilities.

Purpose of the Study:

  • To demonstrate dynamic add-drop filters with variable bandwidth using MEMS-actuated microdisk resonators.
  • To explore the tuning mechanism based on variable power coupling ratio.
  • To characterize the performance of these novel tunable filters.

Main Methods:

  • Fabrication of microdisk resonators integrated with MEMS actuators.
  • Implementation of a tuning mechanism by varying the gap spacing between a waveguide and the microdisk.

Related Experiment Videos

  • Utilizing MEMS actuators to control the gap spacing and thus the coupling ratio.
  • Characterization of wavelength switching, extinction ratio, and tunable bandwidth.

    • Main Results:

    • Successful demonstration of dynamic add-drop filters with variable bandwidth.
    • Achieved wavelength switching with a 20 dB extinction ratio.
    • Demonstrated tunable bandwidth ranging from 12 to 27 GHz.
    • Dual functionality achieved with an operational voltage range of 0–35 V.

    Conclusions:

    • MEMS-actuated microdisk resonators provide a novel platform for dynamic optical filters.
    • The demonstrated device offers simultaneous wavelength switching and tunable bandwidth.
    • This technology holds promise for reconfigurable optical networks and signal processing.