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On-chip mode division (de)multiplexer for multi-band operation
Optics Express
|October 13, 2022
Summary
We developed a novel on-chip mode (de)multiplexer using asymmetric directional couplers for multi-band optical communication. This device enables efficient multi-band transmission by leveraging wavelength-dependent mode coupling, demonstrating its potential for advanced optical networks.
Area of Science:
- Photonics and Optical Engineering
- Integrated Optics
- Waveguide Devices
Background:
- Mode division multiplexing (MDM) is a key technology for increasing optical communication capacity.
- Existing MDM devices often face limitations in multi-band operation and scalability.
Purpose of the Study:
- To propose and demonstrate an on-chip mode division (de)multiplexer for multi-band operation.
- To leverage wavelength-dependent coupling in asymmetric directional couplers (ADCs) for novel functionality.
Main Methods:
- Design of an on-chip mode (de)multiplexer based on ADCs.
- Experimental demonstration of a four-mode (de)multiplexer operating in the C- and O-Bands.
- Characterization of insertion loss (IL) and crosstalk (CT) for different modes and wavelengths.
Main Results:
- Successful experimental demonstration of a four-mode (de)multiplexer.
- Measured IL < 4.7 dB and CT < -10.1 dB in the 1290-1360 nm range (O-Band).
- Measured IL < 3.5 dB and CT < -11.8 dB in the 1510-1580 nm range (C-Band).
Conclusions:
- The proposed ADC-based (de)multiplexer enables efficient multi-band operation.
- The device shows promising performance for integrated multi-band optical communication systems.
- This approach offers a scalable solution for future high-capacity optical networks.
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