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Adjustment of the coupling ratio by laser ablation of Ti:LiNbO3 directional couplers |
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| Authors: | Chii-Chang Chen Henri Porte Jean-Pierre Goedgebuer Vincent Armbruster Richard Ferriere |
| Institution: | a Laboratoire d'Optique P.M. Duffieux, UMR CNRS 6603, Institut des Microtechniques (IMFC), Université de Franche Comté, F-25030 Besançon Cedex, France b Institute of Optical Sciences, National Central University, Chung-Li, 32054 Taiwan |
| Abstract: | The coupling ratio of directional couplers in Z-cut Y-propagation and X-cut Z-propagation LiNbO3 crystals was adjusted by laser ablation. The coupling ratio change is more efficient for the TM-mode of Z-cut couplers. The method can be used to correct the uncertainty of the coupling ratio for directional couplers that occurs during fabrication process. |
| Keywords: | Ablation Directional couplers Integrated optics |
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