The Cobolt Zouk compact continuous-wave (CW) diode-pumped solid-state laser from Cobolt AB operates at 355 nm and delivers 10-mW output power and a TEM00 beam with M2 <1.1. The laser can be used as an alternative to the Ar/Kr-ion UV and quasi-CW UV lasers in applications including fluorescence-based bioanalysis and semiconductor inspection. Built into a hermetically sealed package with an 80 × 60-mm footprint, it produces noise of less than 0.3% rms and a typical spectral linewidth of <30 MHz. It is supplied with an ultracompact controller that can be accessed remotely for operating and monitoring the laser system via a USB or analog interface. It is suitable for flow cytometry and confocal microscopy applications.