  We demonstrate injection-locking of 120mW laser diodes operating at 397nm. We
achieve stable operation with injection powers of ~100uW and a slave laser
output power of up to 110mW. We investigate the spectral purity of the slave
laser light via photon scattering experiments on a single trapped Ca40 ion. We
show that it is possible to achieve a scattering rate indistinguishable from
that of monochromatic light by filtering the laser light with a diffraction
grating to remove amplified spontaneous emission.

Optics;Atomic Physics;Quantum Physics