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Characterization of Anisotropic Leaky Mode Modulators for Holovideo

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Electro-optic waveguide TE <--> TM mode converter with low drive voltage.

R C Alferness¹, L L Buhl

¹Bell Laboratories, Holmdel, New Jersey 07733, USA.

|August 25, 2009

Summary

This summary is machine-generated.

We achieved efficient electro-optic mode conversion in lithium niobate waveguides using only 2.5-V drive. This wavelength-dependent technique enables potential applications in optical wavelength multiplexing and demultiplexing.

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Area of Science:

Photonics and Optical Engineering
Materials Science

Background:

Lithium niobate is a key material for electro-optic devices.
Efficient TE <--> TM mode conversion is crucial for optical signal processing.
Wavelength dependency of mode conversion in birefringent materials presents challenges and opportunities.

Purpose of the Study:

To demonstrate complete electro-optic TE <--> TM mode conversion in Ti-diffused lithium niobate waveguides.
To explore the potential of this method for wavelength multiplexing and demultiplexing applications.
To fabricate independently controlled mode converters on a single substrate.

Main Methods:

Utilizing Ti-diffused lithium niobate waveguides.
Applying an electro-optic drive voltage as low as 2.5-V.
Fabricating three independently controlled mode converters with specific filter bandwidths and center wavelength separations.

Main Results:

Achieved complete electro-optic TE <--> TM mode conversion.
Demonstrated operation with a low drive voltage of 2.5-V.
Successfully fabricated three independently controlled mode converters with 15-Å filter bandwidth and 80-Å center wavelength separation.

Conclusions:

The demonstrated electro-optic mode conversion is highly efficient.
The wavelength-dependent nature of the conversion is suitable for wavelength multiplexing/demultiplexing.
The fabrication of multiple independently controlled converters on a single substrate shows promise for integrated photonic devices.