Ultrahigh-speed distributed Brillouin reflectometry

Distributed birefringence measurement with beat period detection of homodyne Brillouin optical time-domain reflectometry.

We report a distributed optical fiber birefringence measurement method based on homodyne Brillouin optical time-domain reflectometry (BOTDR). Unlike conventional BOTDR, which requires scanning of the local oscillator to get the Brillouin spectrum, instead we propose the beat period measurement of fast and slow components of the backscattered Brillouin signal in single-mode fibers using homodyne...

Proposal of Brillouin optical correlation-domain reflectometry (BOCDR).

We propose a Brillouin optical correlation-domain reflectometry (BOCDR), which can measure the distribution of strain and/or temperature along an optical fiber from a single end, by detecting spontaneous Brillouin scattering with controlling the interference of continuous lightwaves. In a pulse-based conventional Brillouin optical time-domain reflectometry (BOTDR), it is difficult in principle ...

Synthetic Spectrum Approach for Brillouin Optical Time-Domain Reflectometry

We propose a novel method to improve the spatial resolution of Brillouin optical time-domain reflectometry (BOTDR), referred to as synthetic BOTDR (S-BOTDR), and experimentally verify the resolution improvements. Due to the uncertainty relation between position and frequency, the spatial resolution of a conventional BOTDR system has been limited to about one meter. In S-BOTDR, a synthetic spect...

High-speed optical coherence domain reflectometry.

Optical coherence domain reflectometry (OCDR) has emerged as an attractive method for obtaining high-spatial-resolution (<10 Am) reflectance measurements of fiber-optic, integrated-optic, and biological structures.` 8 Most previous OCDR systems have achieved high sensitivity and dynamic range by using narrow-band heterodyne detection by piezoelectric path-length modulation and lock-in amplifier...

Reflectometry Based Quasi - distributed High Temperature Sensor