We have developed a 1.55 µm superluminescent light-emitting diode (SLD) with a tapered active region. We achieved high power and broadband operation demonstrating an output power of 330 mW under cw operation at 7°C. We examined the beam profile of output light by measuring its near field and far field patterns. It was found that the output light shows a fundamental transversal mode profile in both horizontal and vertical directions. This device will be applicable to spectrum-sliced multiwavelength light sources for use in wavelength division multiplexing optical communication systems as well as in lightwave sensing.
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Yamatoya et al. (2001) studied this question.
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