Beam splitting, combining, and cross coupling through multiple superimposed volume-index gratings
✍ Scribed by Jianhua Zhao; Xiaonong Shen; Yueyuan Xia
- Book ID
- 104159547
- Publisher
- Elsevier Science
- Year
- 2001
- Tongue
- English
- Weight
- 226 KB
- Volume
- 33
- Category
- Article
- ISSN
- 0030-3992
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✦ Synopsis
We investigate the di raction properties of multiple-superimposed index gratings from a vector synthetic viewpoint using coupled wave analysis with Bragg and non-Bragg readout. The vector synthetic gratings consist of two volume-index gratings with di erent grating wave vectors, which can be obtained in photorefractive materials, in optical ÿbers or in Bragg cells with two driving acoustic waves. This structure can realize beam splitting, beam combining, and beam cross coupling, etc. Analytic expressions for the di raction e ciency as well as the amplitude of the waves involved are obtained. The results are presented and discussed.