-
公开(公告)号：US5737106A
公开(公告)日：1998-04-07
申请号：US540449
申请日：1995-10-10
CPC分类号： G02B6/2938 , G02B6/2861 , G02B6/29334 , H04J14/0223 , H04Q11/0005 , H04Q2011/0016 , H04Q2011/002 , H04Q2011/0033
摘要： An all-optical time slot interchange device comprises at least two wavelength selective delay lines disposed in series and each comprising a delay line for delaying the propagation of an optical signal by increasing the length of the optical path it travels. An optical signal at a given wavelength is extracted from a guide structure and re-injected into the guide structure via the delay line so as to apply a time-delay to the optical signal at a given wavelength. Applications include wavelength-division multiplexing optical telecommunication systems.
摘要翻译： 全光时隙交换装置包括串联布置的至少两个波长选择性延迟线，每个包括延迟线，用于通过增加光信号的行进长度来延迟光信号的传播。 从引导结构提取给定波长的光信号，经由延迟线重新注入到引导结构中，以给定波长的光信号施加时间延迟。 应用包括波分复用光通信系统。
-
公开(公告)号：US06535669B2
公开(公告)日：2003-03-18
申请号：US09849354
申请日：2001-05-07
IPC分类号： G02B634
CPC分类号： G02B6/278 , G02B6/02109 , G02B6/02138 , G02B6/022 , G02B6/29317
摘要： The invention relates to polarization mode dispersion; writing index variations in a grating written in an optical fiber generates polarization mode dispersion. The invention proposes to compensate this polarization mode dispersion by mechanical curvature of the fiber. The invention provides a simple method of compensating polarization mode dispersion effectively and improving the performance of a grating written in a fiber; it applies in particular to Bragg gratings.
-
公开(公告)号：US5887094A
公开(公告)日：1999-03-23
申请号：US921323
申请日：1997-08-29
申请人： Fatima Bakhti , Isabelle Riant , Pierre Sansonetti
发明人： Fatima Bakhti , Isabelle Riant , Pierre Sansonetti
CPC分类号： G02B6/02095 , G02B6/12007 , G02B6/14 , G02B2006/12107 , G02B2006/12109 , G02B6/02085 , G02B6/29317 , G02B6/29389
摘要： A band-pass filter written into an optical waveguide includes at least one Bragg grating creating coupling between two propagation modes. In one version the pitch of the grating is equal to the length of beating of these two modes, to create codirectional coupling for the LP01 and LP0i modes. In another version the grating couples the LP01 mode to any contradirectional radiation mode. The filter includes, at one point at least of the grating, an area in which one half-period of the grating is omitted to create a phase-shift of .pi. between the two coupled modes.
摘要翻译： 写入光波导的带通滤波器包括至少一个布拉格光栅，其产生两个传播模式之间的耦合。 在一个版本中，光栅的间距等于这两种模式的跳动长度，以创建LP01和LP0i模式的编码耦合。 在另一个版本中，光栅将LP01模式耦合到任何对向辐射模式。 滤波器在至少光栅的一个点处包括省略光栅的一个半周期以在两个耦合模式之间产生pi的相移的区域。
-
4.发明授权公开(公告)号：US06400868B1
公开(公告)日：2002-06-04
申请号：US09490672
申请日：2000-01-24
申请人： Isabelle Riant , Pierre Sansonetti
发明人： Isabelle Riant , Pierre Sansonetti
IPC分类号： G02B634
CPC分类号： G02B6/02114 , G02B6/02085 , G02B6/02109
摘要： The invention proposes a photosensitive optical fiber for inscribing a Bragg grating by UV illumination, in which the photosensitivity is very high either to reduce the exposure time or to increase the contrast of the optically induced refraction index variations, whilst retaining a reasonable exposure time. Thanks to this high contrast, the fiber of the invention, imprinted with a linear chirp, in addition to correcting chromatic dispersion, is also effective in correcting the chromatic dispersion slope of a fiber of ordinary contrast, imprinted with a quadratic chirp. In a preferred embodiment, the fiber of the invention is photosensitive in the cladding. In a particularly advantageous embodiment, a non-photosensitive dopant is added to the core of said fiber to reduce the refractive index in the core, reducing the birefringence of the fiber.
摘要翻译： 本发明提出了一种用于通过UV照射印刷布拉格光栅的光敏光纤，其中光敏性非常高以减少曝光时间或增加光学感应折射率变化的对比度，同时保持合理的曝光时间。 由于这种高对比度，除了校正色散之外，印有线性啁啾的本发明的光纤在校正普通对比度的光纤的色散斜率也是有效的，用二次啁啾印记。 在优选实施例中，本发明的纤维在包层中是感光的。 在特别有利的实施例中，将非光敏掺杂剂添加到所述纤维的芯中以降低芯中的折射率，降低纤维的双折射。
-
5.发明授权Fiber Bragg grating optical filter with a constant group-delay response in its working band 有权光纤布拉格光栅滤波器在其工作频带中具有恒定的组延迟响应公开(公告)号：US06381069B1
公开(公告)日：2002-04-30
申请号：US09594846
申请日：2000-06-15
申请人： Isabelle Riant , Pierre Sansonetti
发明人： Isabelle Riant , Pierre Sansonetti
IPC分类号： G02B518
CPC分类号： G02B6/2932 , G02B6/29394
摘要： The invention relates to the field of optical fiber wavelength division multiplexed transmission, and more particularly to the field of narrow-band optical filters for dense multiplexing. The invention proposes a narrow-band optical filter with a group-delay response that is very flat in the working band, obtained by cascading two Bragg gratings having group delays that are linear as a function of wavelength in the working band, but with their gradients being of opposite signs. The present solution is easier and less costly to implement than the prior art solutions, and it should also offer higher performance.
摘要翻译： 本发明涉及光纤波分复用传输领域，更具体地涉及用于密集复用的窄带光滤波器领域。 本发明提出了一种具有组延迟响应的窄带滤光器，其工作频带非常平坦，通过级联具有组合延迟的两个布拉格光栅获得，该布拉格光栅作为工作频带中的波长的函数是线性的，但是具有它们的梯度 是相反的迹象。 目前的解决方案比现有技术的解决方案更容易且成本更低，并且还应当提供更高的性能。
-
公开(公告)号：US06321008B1
公开(公告)日：2001-11-20
申请号：US09489845
申请日：2000-01-24
申请人： Isabelle Riant , Pierre Sansonetti
发明人： Isabelle Riant , Pierre Sansonetti
IPC分类号： G02B634
CPC分类号： G02B6/02085 , G02B6/0208 , G02B6/02119
摘要： An angled Bragg grating optical waveguide section adjusts the spectral response of a transmission filter in an optical waveguide or in an optical fiber. To smooth the response of the filter, which is subject to modulation due to coupling to the various cladding modes, the pitch of the Bragg grating is caused to vary in a linear fashion along the length of the filter. To adapt the attenuation band to a required band, the cladding of the optical fiber is doped with a photosensitive material so that the grating is also formed in the cladding. The photosensitivity of the cladding is advantageously greater than that of the core, in a ratio in the order of 5:1.
摘要翻译： 倾斜的布拉格光栅光波导部分调节光波导或光纤中的透射滤波器的光谱响应。 为了平滑由于耦合到各种包层模式而受到调制的滤波器的响应，布拉格光栅的间距沿着滤波器的长度以线性方式变化。 为了使衰减频带适应于所需频带，光纤的包层掺杂有感光材料，使得光栅也形成在包层中。 包层的光敏性有利地大于芯的光敏性，其比例为5:1。
-
7.发明授权Method of and system for writing a bragg grating point by point by point in an optical fiber 失效在光纤中逐点写入布拉格光栅的方法和系统
公开(公告)号：US5768454A
公开(公告)日：1998-06-16
申请号：US772514
申请日：1996-12-24
申请人： Jose Chesnoy , Pierre Sansonetti , Isabelle Riant
发明人： Jose Chesnoy , Pierre Sansonetti , Isabelle Riant
CPC分类号： G02B6/02138
摘要： A system for writing a Bragg grating point-by-point in an optical waveguide includes an illumination system for producing a primary beam. It further includes a diffraction grating to receive the primary beam and to produce a zero order secondary beam and two symmetrical secondary beams of higher order and a focusing optical device for focusing the secondary beams onto a writing area of the waveguide. The diffraction grating and the focusing optical device define an intensity function of writing in the area of the guide including a central peak and two secondary peaks spaced from the central peak by a distance equal to the pitch of the grating.
摘要翻译： 在光波导中逐点写入布拉格光栅的系统包括用于产生主光束的照明系统。 它还包括一个衍射光栅，用于接收一次光束，并产生一个零级二次光束和两个高阶对称次级光束，以及一个聚焦光学器件，用于将二次光束聚焦在波导的写入区域上。 衍射光栅和聚焦光学器件限定了在引导区域中写入的强度函数，其包括中心峰值和与中心峰值间隔开距离等于光栅间距的两个次级峰值。
-
公开(公告)号：US07024075B2
公开(公告)日：2006-04-04
申请号：US10220065
申请日：2001-03-01
IPC分类号： G02B6/34
CPC分类号： G02B6/02119 , G02B6/02085
摘要： The invention relates to an optical fiber presenting a core, cladding, and a grating written by irradiation and coupling at least one light mode into the cladding so that it is dissipated therein. The invention proposes causing the mean index to vary progressively along the grating, at least at the ends of the grating. The progressive variation in mean index or in the amplitude of index modulation for writing the grating serves to limit insertion losses to the filter formed by the grating. Analogously, in a written-in grating, the invention provides the equivalent of progressively varying the core size of the fiber for interconnecting two optical fibers presenting different core diameters. The invention is applicable in particular to gain-equalizing filters in WDM transmission systems.
-
公开(公告)号：US5818987A
公开(公告)日：1998-10-06
申请号：US808862
申请日：1997-02-28
CPC分类号： G02B6/021 , G02B6/02095 , G02B6/14 , G02B6/02047
摘要： An optical filter is formed by writing at least one long-period Bragg array into an optical fiber which is tapered to define two substantially adiabatic transition areas delimiting an intermediate area in which the long-period Bragg grating is written to produce codirectional coupling between two guided modes in the intermediate area at a wavelength that is a function of the period of the grating.
摘要翻译： 通过将至少一个长周期布拉格阵列写入到光纤中形成光学滤波器，该光纤是锥形的，以限定两个基本绝热的过渡区域，其界定了长周期布拉格光栅被写入的中间区域，以产生两个引导 在中间区域的以光栅周期为函数的波长的模式。
-
10.发明授权
公开(公告)号：US5613023A
公开(公告)日：1997-03-18
申请号：US510269
申请日：1995-08-02
申请人： Jean Guillon , David Macia , Isabelle Riant , Pierre Sansonetti
发明人： Jean Guillon , David Macia , Isabelle Riant , Pierre Sansonetti
CPC分类号： G02B6/022
摘要： To modify the longitudinal pitch distribution of a diffraction grating, longitudinal dimensional variation is imparted, over time, to a support along the entire length of a line on which said support carries, at least indirectly, a succession of diffraction elements of the grating. By way of example, the support is an auxiliary part on which an optical fiber is stuck, said fiber including said grating. An elongation coefficient dl/l represents the local relative value of dimensional variation. This value varies along said line. The invention is particularly applicable to making variable pitch light-refracting filters in optical fiber telecommunications systems.
摘要翻译： 为了改变衍射光栅的纵向间距分布，随着时间的推移，纵向尺寸变化沿着所述支撑件至少间接地承载一系列光栅衍射元件的线的整个长度被赋予支撑。 作为示例，支撑件是其上粘附有光纤的辅助部件，所述光纤包括所述光栅。 伸长系数dl / l表示尺寸变化的局部相对值。 该值在所述行上不同。 本发明特别适用于在光纤通信系统中制造可变间距光折射滤波器。
-
-
-
-
-
-
-
-
-
搜索结果
35 条记录 (耗时 0.02 秒)
