Journal
IEEE PHOTONICS TECHNOLOGY LETTERS
Volume 30, Issue 7, Pages 618-621Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2018.2808466
Keywords
Mode-division multiplexing; optical waveguide coupler; optical switching device; polymer waveguide; thermo-optic effect
Funding
- National Natural Science Foundation of China [61377057, 61505020]
- Research Grants Council, University Grants Committee, Hong Kong [CityU 11205715]
- Open Fund of IPOC of BUPT [IPOC2016B007]
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We propose a simple thermo-optic mode-selective switch based on an asymmetric directional coupler formed with a two-mode waveguide and a single-mode waveguide, where two electrodes heaters are deposited, respectively, on the two waveguides. Depending on which heater is turned on, either one of the two modes in the two-mode waveguide can be selectively switched to the single-mode waveguide or vice versa. Our typical experimental device fabricated with polymer material, which has a total length of 16.5 mm, shows extinction ratios higher than similar to 10 dB in the C-band for both modes. The switching powers for the two modes are 52 and 109 mW, respectively, and the corresponding switching times are 300 and 400 mu s. This device could be used in reconfigurable mode-division-multiplexing systems.
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