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High spatial resolution measurement of volume holographic gratings

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High spatial resolution measurement of volume holographic gratings

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  • Author: Gregory J. Steckman
The conventional approach for measuring volume holographic gratings typically requires measuring the transmitted and diffracted beams simultaneously while varying the angle of incidence. To obtain the spectral response a tunable laser is used with a fixed angle of incidence. In the former case, the motion of the diffracted beam from reflection gratings requires the detector to move with it, or otherwise the range of angles must be limited.

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