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Multimode Reconfigurable Thermo-Optical Switch Array Based on Silica Platform
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DOI：10.1109/JLT.2024.3411028.png)
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Abstract
En 中文
A multimode reconfigurable non-blocking thermo-optical switch array is proposed and experimentally demonstrated based on silica platform. Four mode (de)multiplexers and a 4 x 4 non-blocking thermo-optical switch are integrated monolithically. Four mode lights, including E-00, E-10, E-20, and E-30, are generated and transported back fundamental mode before launching into switch array. The lights in switch are able to different outputs. The 2 x 2 optical switch unit is a balanced Mach-Zehnder interferometer based on a directional coupler structure, with heated electrodes above two modulation arms. At 1550 nm, with mode (de)multiplexers introduced, the average fiber to fiber losses are increased to 3.05 dB +/- 0.31 dB and 2.75 dB +/- 1.50 dB from 2.69 dB +/- 1.18 dB and 2.68 dB +/- 0.93 dB in the all-cross and all-bar states, respectively. The crosstalk is deteriorated to -12.62 dB from -19.37 dB at 1550 nm. The hybrid reconfigurable system on chip can work among C-band. The chip proves the commercial possible of multimode reconfigurable system on silica platform. Based on photonics integrated circuit platform, compact and large-scale multimode system on chip is promising.
Keywords:
Optical switches
Optical waveguides
Optical crosstalk
Optical variables control
Optical refraction
Optical network units
Optical interferometry
Hybrid integration
integrated optics
mode (de)multiplexer
thermo-optic switch
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