Related Experiment Video
Updated: Jun 13, 2026
11:08
Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
Published on: November 30, 2012
Electrically tunable bandpass filter using solid-core photonic crystal fibers filled with multiple liquid crystals
Lei Wei1, Thomas Tanggaard Alkeskjold, Anders Bjarklev
1DTU Fotonik, Department of Photonics Engineering, Technical University of Denmark, DK-2800 Lyngby, Denmark. lewe@fotonik.dtu.dk
Optics Letters
|May 19, 2010
Summary
This study presents an electrically tunable bandpass filter using liquid crystals in photonic crystal fibers. The filter allows independent tuning of wavelength edges with millisecond response times.
Area of Science:
- Optoelectronics
- Materials Science
- Photonics
Background:
- Photonic crystal fibers (PCFs) offer unique light-guiding properties.
- Liquid crystals (LCs) provide tunable optical characteristics.
- Electrically controlled optical filters are crucial for various applications.
Purpose of the Study:
- To design and fabricate an electrically tunable bandpass filter.
- To achieve independent tuning of the filter's short- and long-wavelength edges.
- To demonstrate fast response times for optical filtering.
Main Methods:
- Integration of two solid-core PCFs filled with different liquid crystals.
- Utilizing a double silicon v-groove assembly for precise alignment.
- Applying separate driving voltages to control LC sections.
Main Results:
- Successful fabrication of an electrically tunable bandpass filter.
- Demonstration of individual and simultaneous tuning of filter edges.
- Achieved response times in the millisecond range.
Conclusions:
- The proposed PCF-based LC filter offers efficient electrical tunability.
- This technology enables rapid and precise control over optical filter characteristics.
- Potential applications in optical communications and sensing systems.
