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Multi-channel mode converter based on a modal interferometer in a two-mode fiber.
Optics Letters
|September 29, 2017
Summary
This study introduces a novel multi-channel mode converter using a modal interferometer in two-mode fiber (TMF). It efficiently converts the LP01 mode to LP11 mode across 20 channels with high efficiency and low loss.
Area of Science:
- Optical Engineering
- Photonics
- Fiber Optics
Background:
- Mode converters are crucial for optical communication systems.
- Two-mode fiber (TMF) offers potential for increased data capacity.
- Existing mode conversion techniques can be complex or inefficient.
Purpose of the Study:
- To propose and demonstrate a novel multi-channel mode converter.
- To achieve efficient mode conversion from LP01 to LP11.
- To enable flexible channel spacing in optical fiber systems.
Main Methods:
- Utilizing a modal interferometer constructed with two lateral stress points in TMF.
- Employing transmission spectra and near-field patterns for analysis.
- Fabricating and testing the device across the C+L wavelength band.
Main Results:
- Successful conversion of the LP01 mode to the LP11 mode at multiple channels.
- Mode conversion efficiency closely matching theoretical predictions, reaching up to 99.5%.
- Achieved low insertion loss as 0.6 dB and demonstrated tunable channel spacing.
Conclusions:
- The proposed multi-channel mode converter based on a modal interferometer in TMF is effective.
- The device offers high performance in terms of conversion efficiency and insertion loss.
- This technology provides a flexible and efficient solution for optical signal processing and communication.
