Laser technology developer Aculight Corp. of Bothell, Wash., and fiber laser maker Koheras of Birkerød, Denmark, announced they have signed a joint marketing agreement for Aculight's Argos single-frequency, continuous-wave, multiwatt tunable optical parametric oscillator (OPO) that contains Koheras' single-frequency fiber lasers. Argos is used in high-resolution spectroscopy applications such as photoacoustic and cavity-ringdown spectroscopy, atom trapping, chemical sensing, and medical applications. Koheras will exclusively sell and market Argos in the UK, Germany, France, Austria, Switzerland, Belgium, the Netherlands, Luxembourg, and the Nordic countries. With the official European launch of the Argos OPO this month, Koheras and Aculight are jointly presenting a demo system at the DPG Spring Meeting in Darmstadt, Germany (March 11-13, level E0, Booth 003), and LOB, Laser Optik Berlin (March 17-19, Hall 18, Booth 404).