Alignment of Free-Space Coupling of Few-Mode Fibre to Multi-Mode Fibre
  using Digital Holography

van den Hout, Menno; van der Heide, Sjoerd; Bradley, Thomas; Velazquez-Benitez, Amado M.; Fontaine, Nicolas K.; Ryf, Roland; Chen, Haoshuo; Mazur, Mikael; Antonio-López, Jose Enrique; Alvarado-Zacarias, Juan Carlos; Amezcua-Correa, Rodrigo; Correa, Marianne Bogot-Astruc Adrian Amezcua; Sillard, Pierre; Okonkwo, Chigo

doi:10.48550/arXiv.2208.02904

Alignment of Free-Space Coupling of Few-Mode Fibre to Multi-Mode Fibre using Digital Holography

Version 2 2023-06-08, 12:57

Version 1 2023-01-12, 15:59

preprint

posted on 2023-06-08, 12:57 authored by Menno van den Hout, Sjoerd van der Heide, Thomas Bradley, Amado M. Velazquez-Benitez, Nicolas K. Fontaine, Roland Ryf, Haoshuo Chen, Mikael Mazur, Jose Enrique Antonio-López, Juan Carlos Alvarado-Zacarias, Rodrigo Amezcua-Correa, Marianne Bogot-Astruc Adrian Amezcua Correa, Pierre Sillard, Chigo Okonkwo

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.