1.3 /spl mu/m InP/InGaAsP digital optical switches with extinction ratio of 30 dB

In this paper, we demonstrate record performance of a 0.5/spl deg/ angle InP/InGaAsP digital optical switch (DOS) at 1.3 /spl mu/m wavelength. Extinction ratios of 30 dB at an injection current of 50 mA have been achieved, almost 10 dB higher than any previous report. We have also measured an extinction ratio of 20 dB at 30 mA, a reduction of more than 40% in injection current from our previous results. Propagation losses of these waveguides are also reported.<
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