TY - JOUR N2 - In this paper, a theoretical design of a novel passive optical line protection device for fiber to the home networks is presented and discussed. Such a device has been designed to overcome several issues of the conventional optical line protection which is based on a switching mechanism controlled electronically. The proposed design is suitable for multiplexed passive optical networks, especially, the dense wavelength division multiplexing technology. This unit is installed at both ends of the network and is composed of a 1×2 splitter to deliver the transmitted multiplexed signal to 2 optical paths and a 2×1 (99.9/0.1) coupler allowing an automatic control when a problem appears. Two optical line protection units exchange optical data through 2 dual fibers. In the case where the primary link suffers from a transmission problem, it automatically switches without any electronic control whatsoever to the backup link through a passive (99.9/0.1) coupler with an average total loss estimated to be of 3.2 dB. L1 - http://journals.pan.pl/Content/118749/PDF/OPELRE_2021_29_1_I_Hacene.pdf L2 - http://journals.pan.pl/Content/118749 PY - 2021 IS - 1 EP - 38 DO - 10.24425/opelre.2021.135826 KW - OLP KW - FTTH KW - PON KW - DWDM KW - 1×2 splitter KW - coupler (99.9/0.1) A1 - Hacene, Imene A1 - Karim, Fethallah PB - Polish Academy of Sciences (under the auspices of the Committee on Electronics and Telecommunication) and Association of Polish Electrical Engineers in cooperation with Military University of Technology VL - 29 DA - 29.03.2021 T1 - Design of a novel passive optical line protection for fiber to the home networks SP - 33 UR - http://journals.pan.pl/dlibra/publication/edition/118749 T2 - Opto-Electronics Review ER -