论文信息 - Optical low coherence reflectometer using [3/spl times/3] fiber coupler

Optical low coherence reflectometer using [3/spl times/3] fiber coupler

This letter reports that a high-sensitivity OLCR incorporating a balanced detection scheme can be constructed using only one [3/spl times/3] fiber coupler, instead of a cascade connection of a few [2/spl times/2] fiber couplers. This is because two ports on the input side of the coupler can be used to perform balanced detection. A shot-noise limited sensitivity of -152 dB could be achieved without paying special attention to reducing reflection at the local oscillator port.<<ETX>>

[1] Makoto Yamada,et al. Ultrahigh-sensitivity low coherence otdr using Er1+-doped high-power superfluorescent fibre source , 1992 .

[2] Akira Himeno,et al. High sensitivity and submillimeter resolution optical time-domain reflectometry based on low-coherence interference , 1992 .

[3] W.V. Sorin,et al. Measurement of Rayleigh backscattering at 1.55 mu m with 32 mu m spatial resolution , 1992, IEEE Photonics Technology Letters.

[4] H. Taylor,et al. Optical fiber component characterization by high-intensity and high-spatial-resolution interferometric optical-time-domain reflectometer , 1991, IEEE Photonics Technology Letters.

[5] K. Yukimatsu,et al. Rayleigh backscattering measurement of single‐mode fibers by low coherence optical time‐domain reflectometer with 14 μm spatial resolution , 1991 .

[6] K. Yukimatsu,et al. Phase-noise and shot-noise limited operations of low coherence optical time domain reflectometry , 1991 .

[7] M. Horiguchi,et al. High-sensitivity low coherence reflectometer using erbium-doped superfluorescent fibre source and erbium-doped power amplifier , 1993 .

[8] Sang K. Sheem,et al. Fiber‐optic gyroscope with [3×3] directional coupler , 1980 .