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Optical bistability has been observed for the first time in a room-temperature InGaAsP/InP amplifier. Switching occurred at an optical input power of about 3 μW, corresponding to a change in the refractive index of 5×10−4. The results are discussed in terms of a light-induced change in carrier concentration. Implications for bistability in passive devices are also discussed.
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Sharfin et al. (1985) studied this question.
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