Abstract
We report divergence, astigmatism and M2 measurements for 8.77μm quantum cascade lasers. Measurements showed divergence of 62° by 32° FWHM ± 2° and M2 values of 1.81 and 1.22 for the fast and slow axes respectively. Astigmatism at source was ~4pm, less than half a wave.
© 2007 Optical Society of America
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