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Efficient mode (de)multiplexer with two cascaded horizontal polymer waveguide directional couplers
Optics Express
|October 27, 2022
Summary
This study introduces an efficient polymer two-mode (de)multiplexer using cascaded asymmetric directional couplers (ADCs). The device achieves high coupling ratios, enhancing optical communication channel capacity and simplifying fabrication.
Area of Science:
- Photonics
- Optical Engineering
- Materials Science
Background:
- Two-mode (de)multiplexers are crucial for increasing optical communication channel capacity.
- Asymmetric directional couplers (ADCs) offer a pathway for efficient mode manipulation.
Purpose of the Study:
- To design and demonstrate an efficient polymer two-mode (de)multiplexer.
- To optimize the performance of cascaded ADCs for mode coupling.
Main Methods:
- Extensive simulations to determine optimal waveguide core dimensions.
- Fabrication and experimental characterization of the proposed (de)multiplexer.
- Theoretical analysis of mode coupling influenced by cascaded positions.
Main Results:
- Achieved a maximum coupling ratio of 96.73% at 1550 nm and 96.12% at 1540 nm.
- Demonstrated coupling ratios >90% over the 1533-1565 nm wavelength range.
- Obtained a maximum extinction ratio of 14.21 dB and minimum insertion loss of 9.75 dB.
Conclusions:
- The proposed cascaded two-mode (de)multiplexer effectively couples modes with high efficiency.
- The device simplifies preparation processes and boosts channel capacity in optical systems.
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