Lithium niobate guided-wave network for a coherent receiver

Area of Science:

• Photonics
• Optical Engineering
• Materials Science

Background:

• Heterodyne receivers are crucial for sensitive optical detection.
• Polarization control is a key challenge in optical communication systems.
• Lithium niobate (LiNbO3) is a widely used material for integrated optics.

Purpose of the Study:

• To develop a packaged LiNbO3 guided-wave network for heterodyne receivers.
• To achieve continuous, reset-free polarization transformation.
• To improve fabrication efficiency and yield.

Main Methods:

• Integration of a tunable 3-dB coupler.
• Incorporation of temperature- and wavelength-insensitive optical compensators.
• Utilization of indium-tin-oxide-metal electrodes for fabrication.

Main Results:

• Demonstration of a functional LiNbO3 guided-wave network.
• Achieved continuous reset-free polarization transformation.
• Attained a high fabrication yield of 90%.

Conclusions:

• The developed LiNbO3 network offers a robust solution for polarization control in heterodyne receivers.
• Indium-tin-oxide electrodes significantly enhance fabrication yield.
• The device provides characteristic performance data for practical applications.