A measurement method of optical fiber length using timestamp technique is demonstrated. Based on IEEE1588 precise clock synchronization protocol, the principle that time delay asymmetry on two path results in synchr...A measurement method of optical fiber length using timestamp technique is demonstrated. Based on IEEE1588 precise clock synchronization protocol, the principle that time delay asymmetry on two path results in synchronization time deviation is used, and the difference between two-path delays could be deduced by measuring the synchronization time deviation reversely. Then the length of optical fiber on one path could be calculated if that on the other path is known Due to the fact that the path of Sync and Delay_Req message is symmetric, the optical pulse dispersion and the asymmetry of photoelectric detector performance on two paths are averaged by exchanging two optical fibers. The time difference between master and slave clocks is eliminated by sharing the same time base. At last, the lengths of two single-mode optical fibers are measured with the uncertainty of 0. 578 m for 3 227. 722 m and 0. 758 m for 25 491. 522 m, respectively. Thus this method has high precision and long range.展开更多
TN25 2003010497硫系光纤的色散测量=Dispersion measurement of As<sub>2</sub><sub>3</sub>fibers[刊,中]/施纯峥（清华大学电子工程系.北京（100084））,黎敏…//光学学报.-2002,22（5）.-535-538利用相移...TN25 2003010497硫系光纤的色散测量=Dispersion measurement of As<sub>2</sub><sub>3</sub>fibers[刊,中]/施纯峥（清华大学电子工程系.北京（100084））,黎敏…//光学学报.-2002,22（5）.-535-538利用相移测量了单模As<sub>2</sub>S<sub>3</sub>光纤在1.55μm附近的色散。测量结果显示,As<sub>2</sub>S<sub>3</sub>光纤的材料色散为-39ps/（km·nm）。特殊的色散特性,预示了硫系光纤及其器件广阔的应用前景。图1表1参3（严寒）展开更多
基金National Natural Science Foundation of China(No.61271120/F010508)National Science and Technology Support Program(No.2014BAK02BO2,No.2014BAK02BO5)National Science and Technology Major Projects(broadband wireless2015ZX03001011-002)
文摘A measurement method of optical fiber length using timestamp technique is demonstrated. Based on IEEE1588 precise clock synchronization protocol, the principle that time delay asymmetry on two path results in synchronization time deviation is used, and the difference between two-path delays could be deduced by measuring the synchronization time deviation reversely. Then the length of optical fiber on one path could be calculated if that on the other path is known Due to the fact that the path of Sync and Delay_Req message is symmetric, the optical pulse dispersion and the asymmetry of photoelectric detector performance on two paths are averaged by exchanging two optical fibers. The time difference between master and slave clocks is eliminated by sharing the same time base. At last, the lengths of two single-mode optical fibers are measured with the uncertainty of 0. 578 m for 3 227. 722 m and 0. 758 m for 25 491. 522 m, respectively. Thus this method has high precision and long range.
文摘TN25 2003010497硫系光纤的色散测量=Dispersion measurement of As<sub>2</sub><sub>3</sub>fibers[刊,中]/施纯峥（清华大学电子工程系.北京（100084））,黎敏…//光学学报.-2002,22（5）.-535-538利用相移测量了单模As<sub>2</sub>S<sub>3</sub>光纤在1.55μm附近的色散。测量结果显示,As<sub>2</sub>S<sub>3</sub>光纤的材料色散为-39ps/（km·nm）。特殊的色散特性,预示了硫系光纤及其器件广阔的应用前景。图1表1参3（严寒）
