Abstract

We demonstrate injection locking of high-power laser diodes operating at 397 nm. We achieve stable operation with an injection power of $\sim 100\mathrm{\mu W}$ and a slave laser output power of up to 110 mW. We investigate the spectral purity of the slave laser light via photon scattering experiments on a single trapped ${{}^{40}\mathrm{Ca}}^{+}$ 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.

© 2015 Optical Society of America

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