Mode Conversion Of Acoustooptic Interaction In Crossed Channel Waveguide

Ching T. Lee

doi:10.1117/12.941360

31 May 1984 Mode Conversion Of Acoustooptic Interaction In Crossed Channel Waveguide

Ching T. Lee

Proceedings Volume 0463, Advanced Semiconductor Processing/Characterization of Electronic/Optical Materials; (1984) https://doi.org/10.1117/12.941360
Event: 1984 Los Angeles Technical Symposium, 1984, Los Angeles, United States

Abstract

In order to study the mechanisms of acoustooptic interactions in a channel waveguide structure, multimode crossed channel waveguides are fabricated on YZ LiNb0₃ substrate. Besides, an intedigital transduce centered at 320 MHz is made on the same substrate for AO interaction by its generated surface acoustic wave. Butt coupling is used for the coupling between Helium-Neon Laser and channel waveguide. The mode conversion due to the AO interaction in multimode channel waveguide is found. This mode conversions only occur among harmonic modes but not TE to TM modes. Those phenomena are studied and demonstrated theoretically and experimentally. In conclusion, the mode conversion of AO interaction in channel waveguide structure is caused by the acoustic beam spread. This result can be explained by phase matching condition.

Citation Download Citation

Ching T. Lee "Mode Conversion Of Acoustooptic Interaction In Crossed Channel Waveguide", Proc. SPIE 0463, Advanced Semiconductor Processing/Characterization of Electronic/Optical Materials, (31 May 1984); https://doi.org/10.1117/12.941360

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