Power Technology Inc. has launched a green-wavelength version of its PM series laser module. Designed for medical and surgical applications, it performs better than red lasers on dark-colored or pigmented skin and on red tissue, the company says. Green-wavelength lasers also are easier to identify under the bright light conditions in the operating room. The PM visible laser diode module is designed for use by OEM medical and surgical manufacturers for integration into existing and prototype low-power lasers. It incorporates a single-mode laser, single-element glass collimating optics or line-generating optics, and the power supply into a single unit. It measures 12.6 mm in diameter, is 50.93 mm long and is available with input ranging from 6 to 8 VDC.