@INPROCEEDINGS {36544,
author={L. M. Sousa and M. Facão and G. Fernandes and R.N.  Nogueira and Ana M. Rocha},
doi={},
booktitle={OSA Frontiers in Optics},
title={Long-period grating based single-mode fiber to multi-core fiber pump coupler},
year={2020},
month={September},
volume={},
pages={FTh2E.3-} 
}