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A 1.3 μm InP/InGaAsP channelled-substrate buried-heterostructure laser is monolithically integrated with a monitoring photodetector. The lasers have threshold currents in the range of 25–30 mA and the photodetector provides ∼ 15 μA of photocurrent per milliwatt of laser power.
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Koszi et al. (1985) studied this question.
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