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CO lasers output at a wavelength of approximately 5 µm, as opposed to 10.6 µm for CO2 lasers.  Since some materials which transmit at the longer (CO2) wavelength absorb at 5 µm, this leads to advantages in various materials processing applications.  For example, there is stronger absorption at 5 µm in certain plastic films, polymers and water, as well as some dielectric materials and copper oxides used in printed circuit boards.  This enables higher efficiency processing of these materials.  Conversely, there is very low absorption at 5 µm in chalcogenide fibers, which opens up the potential for fiber delivery (the lack of a fiber delivery option has limited CO2 lasers in certain applications). Additionally, the shorter wavelength of the CO laser focuses to a spot size that is two times smaller than that of a CO2 laser, enabling significant advantages in the production of smaller holes and features, as well as narrower kerf widths when cutting.

 

The first commercial CO laser available from Coherent is the J-35µm, which outputs over 200W.  The high quality beam (M² < 1.2) produced by this laser allows all the benefits of smaller spot size to be fully realized.  

 

Founded in 1966, Coherent, Inc. is a world leader in providing photonics based solutions to the commercial and scientific research markets, and is part of the Standard & Poor’s SmallCap 600 Index and the Russell 2000.  Please direct any questions about this press release to Andrew Held, Director of Marketing, at 860-769-3148.  For more information about Coherent, including product and financial updates, visit our website at http://www.Coherent.com.