Simple dispersion measurement of a long-span,single-mode fibre using the longitudinal mode spacing of a semiconductor laser |
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Authors: | Jun-Ichi Yamada |
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Institution: | (1) Musashino Electrical Communication Laboratory, Nippon Telegraph and Telephone Public Corporation, Musashino-shi, 180 Tokyo, Japan |
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Abstract: | A simple method for measuring dispersion in long-span single-mode fibre, by using directly modulated multi-longitudinal mode semiconductor lasers, is proposed. Experimental values for single-mode fibre dispersion over a 44.3km span at 1.1 and 1.5 m are 19 and 17 ps km–1 nm–1, respectively, and are in good agreement with Gloge's theory. The zero-dispersion wavelength estimated from the experimental results is about 1.28 m, 8 nm shorter than the theoretical value. |
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