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The linewidth of electrically pumped vertical-cavity surface-emitting lasers optimized for spectroscopic applications in the near-infrared has been examined in detail. Both a high-resolution scanning Fabry-Perot interferometer and a delayed self-homodyne technique were employed for high-resolution linewidth measurement. Record narrow spectral linewidths of 3 MWz were obtained at output powers near 0.8 mW.
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Sopra et al. (1999) studied this question.
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