J. Eur. Opt. Soc.-Rapid Publ.
Volume 13, Number 1, 2017
|Number of page(s)||10|
|Published online||02 November 2017|
Design of fiber-integrated tunable thermo-optic C-band filter based on coated silicon slab
Faculty of Engineering and the Nano-Technology Center, Bar-Ilan University, 5290002, Ramat Gan, Israel
2 Faculty of Engineering, Holon Institute of Technology (HIT), 5810201, Holon, Israel
Accepted: 24 October 2017
Background: Optical filters are required to have narrow band-pass filtering in the spectral C-band for applications such as signal tracking, sub-band filtering or noise suppression. These requirements lead to a variety of filters that offer thermo-optic effect for optical switching, however, some of which without proper thermal and optical efficiency.
Methods: In this paper we propose a tunable thermo-optic filtering device based on a coated silicon slab resonator with an increased Q-factor to allow for an efficient thermo-optical switching in the C-band. The device can be designed either for long range wavelength tuning or for short range with increased wavelength resolution.
Results: Theoretical examination of the thermal parameters affecting the filtering process is shown together with experimental results. Proper channel isolation with an extinction ratio of 20 dB is achieved with a spectral bandpass width of 0.07 nm.
Conclusions: This Si slab based filter characteristics make it suitable for wavelength switching systems such as dense wavelength division multiplexing. In addition, the filter is fiber integrated in order for it to be more compatible with other optics communication devices.
Key words: Optoelectronics / Switching / Resonators / Infrared systems
© The Author(s) 2017
Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
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