Alignment of Free-Space Coupling of Few-Mode Fibre to Multi-Mode Fibre using Digital Holography
Menno van den Hout, Sjoerd van der Heide, Thomas Bradley and, Amado M. Velazquez-Benitez, Nicolas K. Fontaine, Roland Ryf, Haoshuo, Chen, Mikael Mazur, Jose Enrique Antonio-L\'opez, Juan Carlos, Alvarado-Zacarias, Rodrigo Amezcua-Correa, Marianne Bogot-Astruc Adrian
TL;DR
This paper presents a digital holography-based alignment method for coupling a few-mode fiber to a multi-mode fiber in free space, ensuring low mode-dependent loss and crosstalk, which improves over traditional power-based alignment.
Contribution
The paper introduces a novel alignment technique using off-axis digital holography that guarantees low mode-dependent loss and crosstalk in fiber coupling.
Findings
Achieved reliable fiber coupling with low mode-dependent loss.
Demonstrated the effectiveness of digital holography in alignment.
Improved coupling quality over traditional power-based methods.
Abstract
Off-axis digital holography is used to align a few-mode fiber to a multi-mode fiber in a free-space optical setup. Alignment based on power coupling measurements alone cannot guarantee low mode-dependent loss. The proposed alignment method enables reliable fiber coupling with low mode-dependent loss and crosstalk.
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Taxonomy
TopicsPhotonic and Optical Devices · Advanced Fiber Optic Sensors · Optical Network Technologies