| Автор | Namihira, Y. |
| Автор | Horiuchi, Y. |
| Автор | Wakabayashi, H. |
| Автор | Oshimi, T. |
| Автор | Kitagawa, K. |
| Дата выпуска | 1989 |
| dc.description | AbstractA Rayleigh backscattered signal and Fresnel reflection over a 167.6-km and a 251.2-km long pure silica-core fiber (PSF) with fiber loss 0.176 dB/km, and a 138.6-km and a 206.5-km long Ge-doped core dispersion shifted fiber (DSF) with fiber loss 0.218 dB/km have been observed with ultra-long-range optical time domain reflectometry (OTDR) using a 1.55-μm high-power semiconductor laser (LD) and InGaAs-APD with a low dark current at room temperature. The Rayleigh backscattered signal level and fiber loss are strongly dependent on the fiber dopant materials and fiber structural parameters. DSF gives a better SNR for short length fibers because the Rayleigh backscattered signal level is larger than PSF, but because the DSF loss is also larger, PSF gives a better SNR for fibers longer than the critical length. Accordingly, the dynamic range of OTDR in the different fiber types such as PSF and DSF becomes different. One-way backscattered dynamic ranges of 29.5 dB for the PSF and about 30.2 dB for the DSF at room temperature have been achieved. |
| Формат | application.pdf |
| Издатель | Taylor & Francis Group |
| Копирайт | Copyright Taylor and Francis Group, LLC |
| Название | A 168-km ultra-long-range OTDR measurement at a wavelength of 1.55 μm |
| Тип | research-article |
| DOI | 10.1080/01468038908202886 |
| Electronic ISSN | 1096-4681 |
| Print ISSN | 0146-8030 |
| Журнал | Fiber and Integrated Optics |
| Том | 8 |
| Первая страница | 293 |
| Последняя страница | 301 |
| Аффилиация | Namihira, Y.; KDD Meguro R & D Laboratories |
| Аффилиация | Horiuchi, Y.; KDD Meguro R & D Laboratories |
| Аффилиация | Wakabayashi, H.; KDD Meguro R & D Laboratories |
| Аффилиация | Oshimi, T.; Anritsu Corporation Atsugi |
| Аффилиация | Kitagawa, K.; Anritsu Corporation Atsugi |
| Выпуск | 4 |
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