Coherent Inc. has expanded its Sapphire line of compact, continuous-wave visible lasers with several ultranarrow-linewidth models. The new Sapphire SF lasers are available at wavelengths of 488 and 532 nm, and feature single longitudinal output to achieve a linewidth of <1.5 MHz. They are offered with output powers of 20, 50 and 100 mW at 488 nm, and 20, 50, 100 and 150 mW at 532 nm. Independent of wavelength and power class, they are identical in form, fit and function. They provide a high-quality diffraction-limited TEM00 beam with M2 of <1.1, pointing stability of <5 µrad/ºC, power stability of <2% and noise of <0.25% rms from 20 Hz to 2 MHz. The lasers are based on optically pumped semiconductor laser technology.