公开(公告)号：US5394235A

公开(公告)日：1995-02-28

申请号：US214136

申请日：1994-03-16

申请人： Nobunari Takeuchi ,  Tekken Lee ,  Kaoru Shimizu ,  Tsuneo Horiguchi

发明人： Nobunari Takeuchi ,  Tekken Lee ,  Kaoru Shimizu ,  Tsuneo Horiguchi

IPC分类号： G01D21/00 ,  G01M11/00 ,  G02F1/35 ,  G01N21/88

CPC分类号： G01M11/335 ,  G01M11/319 ,  G01M11/332

摘要： An apparatus for measuring a distortion position of an optical fiber is disclosed. A light source generates continuous light with frequency f.sub.0 and injects the continuous light into a far-end of an optical fiber to be measured. An optical coupler divides the outgoing continuous light from a near-end of the optical fiber. An optical amplifier amplifies output light from the optical coupler. A first optical switch generates a first optical pulse by switching output light from the optical amplifier. An optical frequency shifter generates a second optical pulse having frequency components (f.sub.0 +f.sub.m) based on the first optical pulse from the first optical switch. A second optical switch injects the second optical pulse into the near-end of the optical fiber. A display displays outgoing continuous light with frequency f.sub.0 from the near-end of the optical fiber via the optical coupler and the second optical switch. A timing control circuit controls the operation timing of the first and second optical switches and the optical frequency shifter.

摘要翻译： 公开了一种用于测量光纤的失真位置的装置。 光源产生具有频率f0的连续光，并将连续的光注入要测量的光纤的远端。 光耦合器分离出来自光纤近端的输出连续光。 光放大器放大来自光耦合器的输出光。 第一光开关通过切换来自光放大器的输出光产生第一光脉冲。 光移位器基于来自第一光开关的第一光脉冲产生具有频率分量（f0 + fm）的第二光脉冲。 第二光开关将第二光脉冲注入光纤的近端。 显示器通过光耦合器和第二光开关显示来自光纤近端的频率f0的出射连续光。 定时控制电路控制第一和第二光开关和光移频器的操作定时。