2 March 2018 Design of tunable thermo-optic C-band filter based on coated silicon slab
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Abstract
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 such as Mach-Zehnder interferometer inter-leaver in silica, which offer thermo-optic effect for optical switching, however, without proper thermal and optical efficiency. In this paper we propose tunable thermo-optic filtering device based on coated silicon slab resonator with increased Q-factor for the C-band optical switching. The device can be designed either for long range wavelength tuning of for short range with increased wavelength resolution. Theoretical examination of the thermal parameters affecting the filtering process is shown together with experimental results. Proper channel isolation with an extinction ratio of 20dBs is achieved with spectral bandpass width of 0.07nm.
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Hadar Pinhas, Dror Malka, Yossef Danan, Moshe Sinvani, Zeev Zalevsky, "Design of tunable thermo-optic C-band filter based on coated silicon slab ", Proc. SPIE 10526, Physics and Simulation of Optoelectronic Devices XXVI, 105261T (2 March 2018); doi: 10.1117/12.2286570; https://doi.org/10.1117/12.2286570
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