Abstract
A numerical-impulse-response technique for studying the propagation and diffraction of finite-width beams in planar phase gratings is described. It can account for both symmetric and asymmetric diffractions. The grating-length-to-beam-width ratio is shown to govern the extent of beam-profile distortion and selectivity sidelobe suppression. Trade-offs between diffraction efficiency and beam profile have also been demonstrated. Theoretical results have been verified by experimental observa-tions in a planar waveguide geometry of diffracted beams that change from a single diffraction peak to multiple peaks as the grating-length-to-beam-width ratio increases.
Original language | English (US) |
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Pages (from-to) | 582-592 |
Number of pages | 11 |
Journal | Applied Optics |
Volume | 35 |
Issue number | 4 |
DOIs | |
State | Published - Feb 1 1996 |
Keywords
- Diffraction
- Finite beam
- Grating
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics