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Photonics Spectra
Jul 2005
To facilitate laser shutter integration for OEMs and researchers, nmLaser Products Inc. has launched online applications tutorials and other resources for its high-irradiance laser shutters. An introductory tutorial discusses shutter basics, the principles of the patented cantilever flexure beam technology and the safety-interlock and process-control and modulation/exposure/pulse-gating families of shutters. A segment on controllers includes a diagram of a capacitor discharge circuit. Application notes address such areas as contamination, shutter lifetime, user-built circuits, thermal and mechanical mounting, and beam properties, alignment and polarization. A model finder expedites the shutter selection process based on criteria such as beam size, output power, repetition rate and pulse damage thresholds.

With respect to light radiation, the restriction of the vibrations of the magnetic or electric field vector to a single plane. In a beam of electromagnetic radiation, the polarization direction is the direction of the electric field vector (with no distinction between positive and negative as the field oscillates back and forth). The polarization vector is always in the plane at right angles to the beam direction. Near some given stationary point in space the polarization direction in the beam...
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