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Mode multi/demultiplexer based on cascaded asymmetric Y-junctions.
Optics Express
|October 24, 2013
Summary
This study introduces a novel mode (de)multiplexer using cascaded asymmetric Y-junctions. The device achieves low loss and a 140 nm spectral bandwidth with crosstalk below -21.8 dB.
Area of Science:
- Photonics
- Optical Engineering
- Waveguide Devices
Background:
- Mode (de)multiplexers are crucial for optical communication systems.
- Existing devices often face limitations in spectral bandwidth and insertion loss.
Purpose of the Study:
- To propose and analyze a novel mode (de)multiplexer with enhanced performance.
- To achieve low insertion loss and a large spectral bandwidth.
Main Methods:
- Device design utilizing cascaded asymmetric Y-junctions.
- Analysis performed using the beam propagation method.
- Optimization of Y-junction arm widths for mode conversion.
Main Results:
- Demonstrated a 1x4 mode (de)multiplexer.
- Achieved negligible insertion loss.
- Obtained a common spectral bandwidth of 140 nm.
- Demultiplexed crosstalk below -21.8 dB.
Conclusions:
- The proposed Y-junction based mode (de)multiplexer offers excellent performance.
- The design enables efficient mode conversion for multiplexing and demultiplexing.
- This technology holds promise for advanced optical networking applications.
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