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Figure 1
The incoming free-space o mode excites two guided modes within the crystal, which are linear superpositions of the o and h modes. The guided modes propagate parallel to the diffracting planes and spread into the Bormann fan. At the exit, they excite the free-space o and h modes, whose intensities depend on the crystal thickness (the dual of the impulse duration in atom interferometry). In a symmetrically cut crystal, the diffracting planes are orthogonal to the crystal surfaces.

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 57| Part 1| February 2024| Pages 44-59
https://doi.org/10.1107/S1600576723010245
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