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TE/TM mode electro-optic conversion based on a titanium diffusion lithium niobate waveguide with a
Applied Optics
|December 1, 2023
Summary
We developed an electro-optic polarization mode converter using titanium-diffused lithium niobate (LN) waveguides and PANDA polarization-maintaining optical fibers (PMFs). This device enables efficient transverse electric (TE) to transverse magnetic (TM) mode conversion with wavelength tunability for enhanced optical communication.
Area of Science:
- Photonics
- Materials Science
- Optical Engineering
Background:
- Lithium niobate (LN) optical waveguide technology is crucial for photonic integrated circuits.
- Titanium (Ti)-diffused LN waveguides are fundamental for electro-optic (EO) devices.
- Polarization conversion enhances optical transmission effectiveness and capacity.
Purpose of the Study:
- To present an electro-optic (EO) polarization mode converter.
- To utilize PANDA polarization-maintaining optical fibers (PMFs) for broadband wavelength applications.
- To achieve wavelength tunability and multiwavelength modulation.
Main Methods:
- Fabrication of Ti-diffused LN waveguides.
- Packaging with PANDA PMFs for broadband operation (1440-1620 nm).
- Characterization of TE to TM mode conversion efficiency and frequency response.
Main Results:
- Efficient TE to TM mode conversion achieved with applied voltage.
- Broadband operation across 1440-1620 nm with wavelength tunability.
- High-frequency response (~600 MHz) and insertion loss below 5 dB.
Conclusions:
- The developed EO polarization mode converter demonstrates high performance for optical communication.
- LN-based polarization devices are promising for chip-integrated polarization telecommunication systems.
- The device offers efficient mode conversion and broadband tunability.
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