A high-performance 1 × 8 digital thermo-optic (TO) switch that uses silicone resin waveguides has been developed. The compact 40 mm long switch uses short Y-branching switches with a large branching angle. It has a low insertion loss of < 3 dB and a low crosstalk of < –40 dB at 1550 nm.
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Ooba et al. (1999) studied this question.
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