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Adjustment of the coupling ratio by laser ablation of Ti:LiNbO3 directional couplers

โœ Scribed by Chii-Chang Chen; Henri Porte; Jean-Pierre Goedgebuer; Vincent Armbruster; Richard Ferriere

Publisher
Elsevier Science
Year
2002
Tongue
English
Weight
119 KB
Volume
34
Category
Article
ISSN
0030-3992

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โœฆ Synopsis

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 e cient 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.

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Fine adjustment of the coupling length o
Fine adjustment of the coupling length of a Ti-diffused LiNbO3 directional coupler with a groove structure
โœ Ju-Feng Liu; Yih-Bin Lin; Way-Seen Wang ๐Ÿ“‚ Article ๐Ÿ“… 2001 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 113 KB

## Abstract Two kinds of groove structure for shortening and broadening the coupling lengths of Ti:diffused LiNbO~3~ directional couplers are presented. The coupling lengths as functions of the depth, width, and spacing of the grooves were numerically calculated. The results show that the maximum s