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Improved 8-channel silicon mode demultiplexer with grating polarizers
Optics Express
|June 13, 2014
Summary
This study presents an improved 8-channel silicon mode demultiplexer using grating polarizers. This device efficiently separates optical modes and polarizations, significantly reducing crosstalk for enhanced optical communication.
Area of Science:
- Photonics
- Optical Engineering
- Materials Science
Background:
- Silicon photonics enables integrated optical circuits.
- Mode division multiplexing (MDM) increases data capacity.
- Efficient polarization and mode separation is crucial for MDM.
Purpose of the Study:
- To develop an improved 8-channel silicon mode demultiplexer.
- To integrate polarization and mode separation functionalities.
- To enhance the performance of silicon-based optical communication systems.
Main Methods:
- Fabrication of an 8-channel silicon mode demultiplexer.
- Incorporation of TE-type and TM-type grating polarizers.
- Utilizing a three-waveguide polarization beam splitter (PBS) and cascaded arrayed waveguide gratings (ADCs).
Main Results:
- The device successfully demultiplexes 8 channels with hybrid polarization.
- Grating polarizers act as efficient fiber-chip couplers.
- Measured polarization crosstalk is reduced to approximately -20dB over a 100nm bandwidth.
Conclusions:
- The improved silicon mode demultiplexer offers efficient mode and polarization separation.
- Grating polarizers are effective for crosstalk reduction and coupling.
- This technology advances high-capacity silicon photonic integrated circuits.
