Dual-wavelength emission from a twin-stripe single quantum well laser

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Abstract
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.