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Photonics Spectra
Aug 2005
Kugler of America Ltd.Request Info
QUELLING BACKREFLECTION To prevent mode-hopping and power instability, backreflections from CO2 lasers must be suppressed. The laser source is isolated by separating the forward beam that hits the workpiece from the light directed backward by polarization, via a standard phase retarder mirror. An absorbing mirror inserted into the beam path between the laser source and the phase retarder mirror eliminates the backreflected light. The BRS Compact mirror housing from Kugler GmbH features a 50-mm mechanical interface that is compatible with its 90° bending units. The BRS housing contains the water-cooled backreflection suppressor and the phase retarder mirrors at prealigned angles, along with an adjustable flat mirror, resulting in a stable 90° beam bend.


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