Spectrally stable Er-fiber laser for application in phase-sensitive optical time-domain reflectometry |
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Authors: | Kyoo Nam Choi HF Taylor |
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Affiliation: | Dept. of Commun. Eng., Incheon City Coll., South Korea; |
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Abstract: | A high degree of frequency stability in an Er-fiber laser with the Fabry-Perot configuration was achieved using a long (25-km) optical-feedback loop. The frequency-drift rate was determined to be <1 MHz/min by observing temporal fringes in an unbalanced Mach-Zehnder interferometer. Instantaneous linewidth measured with a delayed self-heterodyne interferometer was less than the 3-kHz resolution limit. The laser was utilized in an optical time-domain reflectometry experiment to detect and locate a time-varying phase perturbation applied to an optical fiber. |
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