Experimental demonstration of a low-loss optical H-tree distribution using silicon-on-insulator microwaveguides

Vivien, L.; Lardenois, S.; Pascal, D.; Laval, S.; Cassan, E.; Cercus, J. L.; Koster, A.; Fédéli, J. M.; Heitzmann, M.
August 2004
Applied Physics Letters;8/2/2004, Vol. 85 Issue 5, p701
Academic Journal
The experimental demonstration of an optical H-tree distribution from one input to sixteen outputs compatible with the size of a microelectronic chip is reported. It is based on low-loss silicon-on-insulator rib submicron waveguides. Each branch is 1 cm long and includes four ultracompact T splitters and two mirrors allowing 90° direction changes. The mean value of the global losses has been measured and is found equal to 26 dB, which corresponds to a power of 2.6 μW at each output, for a 3 mW laser diode power at the input. This demonstration is an important step for on-chip optical clock distribution in complementary metal–oxide–Semiconductor integrated circuits.


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