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We demonstrate a dual-wavelength laser constructed from a single quantum well structure. The device includes twin-stripe waveguides which differ in width. The two constituent emitters in the device of appropriate cavity lengths operate at widely different wavelengths, which are based on the lowest (n=1) and the second (n=2) quantized state transitions. Lasing behavior is interpreted in terms of the difference of the internal cavity loss of the waveguides.
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Tokuda et al. (1987) studied this question.
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