Combined frequency and phase domain time-gated reflectometry based on a fiber with reflection points for absolute measurements

Abstract

The paper discusses a new method that combines frequency and phase domains-gated reflectometry. This approach can be applied to a fiber with artificial reflectors to measure the absolute values of optical paths between reflection points in the fiber in the full range of signal frequencies, including zero frequency.

Keywords

• Rayleigh backscattering
• OTDR
• OFDR
• Time-gated OFDR
• Fiber optic sensors