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Low-loss Y-branch 3 dB power dividers in Ti: LiNbO3 have been designed and tested. The symmetric output arms consist of S-bends. Numerous Y-branches were made exhibiting <0.25 dB excess loss for both the TE and TM polarisations. Histograms of the splitting ratio are also included, and demonstrate the excellent splitting ratios achieved.
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Bogert et al. (1989) studied this question.
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