Acta Optica Sinica, Volume. 8, Issue 9, 838(1988)
Beam-splitting techniques in multichannel optical disk memory
An analysis of multifrequency A-O deflections and diffraction grating for multibeam-splitting techniques applied in the optical disc storage is given in this paper. Based on the theory of binary computer-generated holograms, accurate periodic parameters of a phase grating which can generate equal-intensity multiple beams are obtained by using pulse position modulation in terms of computer analogue. According to the parameters, a phase grating has been fabricated by a special method. The phase grating has a total diffraction efficiency of 73% with the masxmum residual deviation of 1.75 % from the average, which can meet the practical usage.
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Wu ZHen, RuAN YU, WANG HUI. Beam-splitting techniques in multichannel optical disk memory[J]. Acta Optica Sinica, 1988, 8(9): 838