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    • 6. 发明授权
    • Intrinsic Fabry-Perot optical fiber sensors and their multiplexing
    • 内置法布里 - 珀罗光纤传感器及其复用
    • US07308162B2
    • 2007-12-11
    • US10656256
    • 2003-09-08
    • Anbo Wang
    • Anbo Wang
    • G02B6/00G02B6/34G02F1/295
    • G02B6/29368G01L1/242G01L1/246G01L11/025G02B6/02052G02B6/02076G02B6/2938
    • An intrinsic Fabry-Perot optical sensor includes a thin film sandwiched between two fiber ends. When light is launched into the fiber, two reflections are generated at the two fiber/thin film interfaces due to a difference in refractive indices between the fibers and the film, giving rise to the sensor output. In another embodiment, a portion of the cladding of a fiber is removed, creating two parallel surfaces. Part of the evanescent fields of light propagating in the fiber is reflected at each of the surfaces, giving rise to the sensor output. In a third embodiment, the refractive index of a small portion of a fiber is changed through exposure to a laser beam or other radiation. Interference between reflections at the ends of the small portion give rise to the sensor output. Multiple sensors along a single fiber are multiplexed using an optical time domain reflectometry method.
    • 内在的法布里 - 珀罗光学传感器包括夹在两个光纤端之间的薄膜。 当光发射到光纤中时,由于光纤和膜之间的折射率差异,导致两个光纤/薄膜接口产生两个反射,从而产生传感器输出。 在另一个实施例中,纤维的包层的一部分被去除,形成两个平行的表面。 在光纤中传播的光的消逝场的一部分在每个表面反射,产生传感器输出。 在第三实施例中,纤维的一小部分的折射率通过暴露于激光束或其它辐射而改变。 小部分端部反射之间的干扰导致传感器输出。 使用光时域反射法来复用单个光纤上的多个传感器。