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公开(公告)号：US06993241B2
公开(公告)日：2006-01-31
申请号：US10658606
申请日：2003-09-08
申请人： Mara Bagnasco , Valeria Gusmeroli
发明人： Mara Bagnasco , Valeria Gusmeroli
CPC分类号： G02B6/02114 , C03C13/046 , C03C25/6226 , C03C2201/06 , C03C2201/12 , C03C2201/31 , G02B6/02123 , G02B6/443
摘要： The present invention provides an optical fiber providing high photosensitivity in the absence of hydrogen loading as well as a low numerical aperture. One aspect of the present invention relates to an optical fiber including a core, the core comprising silica doped with at least about 6 mol % germania and at least about 0.9 wt % fluorine; and a cladding surrounding the core. The optical fiber of the present invention is suitable for the production of fiber Bragg gratings.
摘要翻译： 本发明提供了一种在不存在氢负载和低数值孔径下提供高光敏性的光纤。 本发明的一个方面涉及一种包括芯的光纤，所述芯包括掺杂有至少约6mol％的氧化锗和至少约0.9wt％的氟的二氧化硅; 以及围绕芯的包层。 本发明的光纤适用于制造光纤布拉格光栅。
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2.发明授权
公开(公告)号：US5333045A
公开(公告)日：1994-07-26
申请号：US838886
申请日：1992-02-21
CPC分类号： G01D5/35303 , G01D5/266
摘要： A superluminescent source emits a wide-band light beam, that is frequency modulated by a filter with a pass band centred on a frequency that is made to vary according to a predetermined law so as to frequency modulate the light beam. Means for splitting and recombining beams determine a mutual phase shift between two components of the beam that depends on the physical magnitude to be measured and is detected by a detector as an indication of the value of the magnitude itself.
摘要翻译： 超发光源发射宽带光束，其由滤波器进行频率调制，滤波器的通带以中心在根据预定定律变化的频率上，以便对光束进行频率调制。 用于分束和重组光束的装置确定了取决于待测量的物理大小并由检测器检测的光束的两个分量之间的相互相移作为幅度本身的值的指示。
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公开(公告)号：US5072113A
公开(公告)日：1991-12-10
申请号：US579866
申请日：1990-09-07
CPC分类号： G01L1/243 , G01D5/35383
摘要： In a polarimetric fibre-optic sensor using a polarization-maintaining optical fibre with two light propagation modes, a reference light signal is fed to propagate along the optical fibre in accordance with one propagation mode, a series of measurement light signals being induced by a series of optical fibre deformation elements, to propagate along the optical fibre in accordance with the other propagation mode, each being unbalanced in time with respect to the reference light signal by an amount which is different from that of the other measurement light signals; by using particular interferometric techniques, compensating the unbalances and analyzing the signals resulting from the interference between the measurement light signals and the reference light signal it is possible to determine and locate a physical phenomenon which disturbs the optical fibre.
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公开(公告)号：US06266463B1
公开(公告)日：2001-07-24
申请号：US09099467
申请日：1998-06-18
IPC分类号： G02B634
CPC分类号： G02B6/29317 , G02B6/02085 , G02B6/29394
摘要： A method of fabricating a chirped optical fibre grating so that the grating has a predetermined desired wavelength-dependent response across an operational bandwidth comprises apodising the grating so that a degree of apodisation at a longitudinal position along the grating corresponds to the desired response at the optical wavelength reflected at that longitudinal position along the grating.
摘要翻译： 一种制造啁啾光纤光栅的方法，使得光栅在操作带宽上具有预定的期望的依赖于波长的响应包括对光栅进行变迹，使得沿着光栅的纵向位置处的蜕变程度对应于光学期望的响应 在沿着光栅的纵向位置反射的波长。
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公开(公告)号：US5268739A
公开(公告)日：1993-12-07
申请号：US803485
申请日：1991-12-04
摘要： In a laser apparatus for measuring the velocity of a fluid, a measurement laser light beam (M) fed into the fluid and scattered by a particle within the fluid is made to interfere with a reference laser light beam (R) to generate an interference signal based on the velocity of the particle; the apparatus comprises a low-coherence laser source (10) and interferometric means (11, 12) which split the light beam of the laser source (10) into the stated reference light beam (R) and measurement light beam (M), and cause the reference light beam (R) derived from the laser source (10) to interfere with the backscattered component resulting from the scattering of the measurement light beam (M).
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