Planar achromatic multiple beam splitter by adiabatic light transfer.

Area of Science:

• Optics and Photonics
• Integrated Photonics
• Waveguide Technology

Background:

• Multiple beam splitters are crucial for optical signal processing.
• Existing achromatic beam splitters often lack robustness or are complex to fabricate.
• On-chip photonic devices require compact and efficient light manipulation solutions.

Purpose of the Study:

• To introduce a novel achromatic and robust scheme for n-fold multiple beam splitting.
• To experimentally verify the concept for a one-to-three beam splitter.
• To demonstrate the potential for ultra-high bandwidth on-chip photonic devices.

Main Methods:

• Utilizing adiabatic light transfer in a planar geometry of coupled waveguides.
• Employing a reconfigurable light-induced waveguide structure.
• Experimental verification at two distinct operating wavelengths.

Main Results:

• Successful demonstration of a one-to-three achromatic beam splitter.
• Robust performance across multiple operating wavelengths.
• Validation of the adiabatic light transfer principle in coupled waveguides.

Conclusions:

• The proposed scheme offers a robust and achromatic solution for multiple beam splitting.
• The demonstrated planar-type achromatic beam splitter is suitable for integrated photonic applications.
• This technology paves the way for advanced ultra-high bandwidth on-chip photonic devices.