R. Koyama, K. Nakajima, and T. Kurashima, "Physical Contact Connection of Single-Mode Fiber with Cleaved and Unpolished Endface,"
in National Fiber Optic Engineers Conference,
OSA Technical Digest
(Optical Society of America, 2012), paper NTh1D.6.
The physical contact connection of an SMF with a return loss of more than 50 dB is achieved by using the cleaved fiber endface. The fiber endface requirements and appropriate cleaving conditions are clarified.