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We generate 555.8nm light with sub-MHz linewidth through the use of laserinjection-locking of a semiconductor diode at 1111.6nm, followed by frequencydoubling in a resonant cavity. The integrity of the injection lock isinvestigated by studying an offset-beat signal between slave and master lasers,by performing spectroscopy on the $(6s)^{2}$ $^{1}S_{0}-\,(6s6p)$ $^{3}P_{1}$transition in magneto-optically trapped ytterbium, and by demonstratingadditional laser cooling of $^{171}$Yb with the 555.8nm light. For the$^{1}S_{0}-$ $^{3}P_{1}$ spectroscopy, we confirm the linear dependence betweenground state linewidth and the intensity of an off-resonant laser, namely, thatused to cool Yb atoms in a $^{1}S_{0}-$ $^{1}P_{1}$ magneto-optical trap. Ourresults demonstrate the suitability of injection locked 1100-1130nm laserdiodes as a source for sub-MHz linewidth radiation in the yellow-greenspectrum.

Spectroscopy and laser cooling on the $^{1}S_{0}-\,^{3}P_{1}$ line in Yb via an injection-locked diode laser at 1111.6nm