Both the DY and DYH Series green Nd:YAG lasers from Power Technology Inc. were designed with the OEM in mind but are also suitable for laboratory work. The single-piece DY Series devices operate at 532 nm and are available in 0.3-, 1-, 3-, 5-, 10- and 20-mW units. Axial beam alignment and beam centering are standard. The two-piece DYH Series is available in powers of 50, 100 and 150 mW. Telescopes, beam expanders and optical bench mounts can be obtained as options for both series.