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We have integrated a broadly tunable grating-assisted vertical coupler as an intracavity filter to demonstrate a novel monolithic multiple-quantum-well InGaAsP/InP laser. The narrow, bandpass intracavity filter results in an extended cavity laser with a measured electrical tuning range of 57 nm with single-frequency operation over most of that range.
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Alferness et al. (1992) studied this question.
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