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Low-cross-talk waveguide polarization multiplexer/demultiplexer for lambda = 1.32 microm.

R C Alferness, L L Buhl

|September 2, 2009

Summary

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Characteristics of Ti-diffused lithium niobate optical directional couplers.

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Optical guided-wave devices.

Science (New York, N.Y.)·1986

We developed a new integrated-optic splitter for selecting or extracting both TE and TM polarizations. This device offers high polarization selectivity with crosstalk below -30 dB.

Area of Science:

Photonics and Optical Engineering
Materials Science

Background:

Integrated optics offer miniaturized optical components.
Polarization control is crucial for optical signal processing.

Purpose of the Study:

To demonstrate a novel integrated-optic device for TE/TM mode splitting.
To achieve high polarization selectivity and simultaneous mode extraction.

Main Methods:

Utilized a titanium-indiffused lithium niobate (Ti:LiNbO3) directional coupler.
Applied specific voltages to control polarization selection.

Main Results:

Achieved polarization selection with crosstalk below -30 dB.
Demonstrated simultaneous extraction of TE and TM modes with -24 dB crosstalk.

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Conclusions:

The proposed Ti:LiNbO3 directional coupler effectively functions as a polarization-selective splitter.
The device shows potential for advanced optical communication and signal processing applications.