Speed of Light in Hollow-Core Photonic Bandgap Fiber Approaching That in Vacuum

A Fresnel mirror is introduced at a hollow-core photonic bandgap fiber end by fusion splicing a short single-mode fiber segment, to reflect the light backward to an optical frequency domain reflectometry. The backward Fresnel reflection is used as a probe light to achieve light speed measurement wit...

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Bibliographic Details

Published in:	Sensors
Main Authors:	Xiaolu Cao, Mingming Luo, Jianfei Liu, Jie Ma, Yundong Hao, Yange Liu
Format:	Article
Language:	English
Published:	MDPI AG 2024-10-01
Subjects:	hollow-core photonic bandgap fiber Fresnel reflection optical frequency domain reflectometry light speed measurement
Online Access:	https://www.mdpi.com/1424-8220/24/21/6954