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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.
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公开(公告)号：US07095924B2
公开(公告)日：2006-08-22
申请号：US10869882
申请日：2004-06-18
IPC分类号： G02B6/34
CPC分类号： G02B6/02085 , G02B6/02095 , G02B6/14 , G02B6/29317
摘要： An optical filter comprises a first mode converter converting an incident light signal propagating in an incident mode into a signal propagating in a propagation mode LPnm of order higher than that of said incident mode; a second mode converter converting the light signal of higher propagation order LPnm into a signal propagating in the incident propagation mode; and a slanted Bragg grating disposed between said first and second mode converters and adapted to couple the higher propagation order light signal LPnm in back-propagation into said incident mode. The filter is applicable to flattening gain and to multiplexing DWDM signals.
摘要翻译： 光滤波器包括：将入射模式传播的入射光信号转换为以比所述入射模式高的传播模式LPnm传播的信号的第一模式转换器; 第二模式转换器将较高传播阶数LPnm的光信号转换为在入射传播模式中传播的信号; 以及设置在所述第一和第二模式转换器之间并适于将反向传播中的较高传播级光信号LPnm耦合到所述入射模式中的倾斜布拉格光栅。 滤波器适用于平坦化增益和复用DWDM信号。
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公开(公告)号：US06954567B2
公开(公告)日：2005-10-11
申请号：US10423980
申请日：2003-04-28
CPC分类号： G02B6/02138 , G02B6/02085 , G02B6/12007 , G02B6/124 , G02B6/266
摘要： An optical filter composed of a concatenation of elementary filters consisting of chirped slanted Bragg gratings written on a continuous portion of an optical waveguide, characterized in that the various gratings in the concatenation have the same angle, identical lengths and a linear chirp.
摘要翻译： 由滤波器组成的滤波器组成，该滤波器由写入光波导的连续部分上的啁啾倾斜布拉格光栅组成，其特征在于，串联中的各种光栅具有相同的角度，相同长度和线性啁啾。
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4.发明授权Suppresson of undesirable signal propagation mode(s) downstream of mode converter 失效抑制模式转换器下游不良信号传播模式公开(公告)号：US07724995B2
公开(公告)日：2010-05-25
申请号：US10566376
申请日：2004-09-29
CPC分类号： G02B6/02095 , G02B6/14
摘要： An optical device (D) is dedicated to the transformation of the propagation mode of optical signals. This device comprises at least a first mode converter (3) that is supplied with signals that are propagated in a first guided mode and that delivers the signals in a multimode fibre (4) partly in the first guided mode and partly in a second guided more of a higher order that the first. The multimode fibre (4) comprises at least first passive filtering means (R) which have the task of converting the first guided mode into at least one dissipative cladding mode in order to prevent or limit the propagation of the signals in this first guided mode while at the same time authorising the propagation of the signals having the second guided mode in the multimode fibre (4).
摘要翻译： 光学装置（D）专用于光信号的传播模式的变换。 该装置至少包括第一模式转换器（3），该第一模式转换器（3）被提供有以第一引导模式传播的信号，并且以多模光纤（4）部分地以第一引导模式传送信号，并部分地以第二导向 一个较高的阶数是第一个。 多模光纤（4）至少包括第一无源滤波装置（R），其具有将第一导模转换成至少一个耗散包层模式的任务，以便防止或限制在该第一导向模式中的信号的传播，同时 同时授权在多模光纤（4）中传播具有第二引导模式的信号。
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公开(公告)号：US06873765B2
公开(公告)日：2005-03-29
申请号：US10412301
申请日：2003-04-14
申请人： Hedi Labidi , Carlos De Barros , Hervé Loury , Xavier Bonnet , Isabelle Riant , Jean-Jacques Guerin
发明人： Hedi Labidi , Carlos De Barros , Hervé Loury , Xavier Bonnet , Isabelle Riant , Jean-Jacques Guerin
IPC分类号： G02B6/34 , H01S3/00 , H01S3/067 , H04B10/294
CPC分类号： G02B6/02195 , G02B6/02095 , H01S3/005 , H01S3/06754 , H01S2301/04 , H01S2301/06 , H04B10/2941
摘要： A tuneable optical fibre comprising a long-period Bragg grating (5) written in a portion of an optical waveguide (10) comprising a core and an optical cladding (11), characterised in that the portion of the waveguide comprising the grating (5) is at least partially immersed in an external environment consisting of two distinct sections, a first section (1) whose refractive index is higher than that of the optical cladding (11) and a second section (2) whose refractive index is lower than that of the optical cladding (11), the long-period grating being at least partially immersed in one of the said sections so as to almost independently tune the wavelength and/or the contrast of the spectral response of the filter.
摘要翻译： 一种可调谐光纤，包括写入包括芯和光学包层（11）的光波导（10）的一部分中的长周期布拉格光栅（5），其特征在于，包括光栅（5）的波导部分 至少部分地浸没在由两个不同部分组成的外部环境中，第一部分（1）的折射率高于光学包层（11）的折射率，第二部分（2）的折射率低于 所述光学包层（11），所述长周期光栅至少部分地浸没在所述部分之一中，以便几乎独立地调节所述滤光器的光谱响应的波长和/或对比度。
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6.发明申请Suppresson of Undesirable Signal Propagation Mode(S) Downstream of Mode Converter 失效抑制模式转换器下游不良信号传播模式（S）公开(公告)号：US20090041410A1
公开(公告)日：2009-02-12
申请号：US10566376
申请日：2004-09-29
IPC分类号： G02B6/26
CPC分类号： G02B6/02095 , G02B6/14
摘要： An optical device (D) is dedicated to the transformation of the propagation mode of optical signals. This device comprises at least a first mode converter (3) that is supplied with signals that are propagated in a first guided mode and that delivers the signals in a multimode fibre (4) partly in the first guided mode and partly in a second guided more of a higher order that the first. The multimode fibre (4) comprises at least first passive filtering means (R) which have the task of converting the first guided mode into at least one dissipative cladding mode in order to prevent or limit the propagation of the signals in this first guided mode while at the same time authorising the propagation of the signals having the second guided mode in the multimode fibre (4).
摘要翻译： 光学装置（D）专用于光信号的传播模式的变换。 该装置至少包括第一模式转换器（3），该第一模式转换器（3）被提供有以第一引导模式传播的信号，并且以多模光纤（4）部分地以第一引导模式传送信号，并部分地以第二导向 一个较高的阶数是第一个。 多模光纤（4）至少包括第一无源滤波装置（R），其具有将第一导模转换成至少一个耗散包层模式的任务，以便防止或限制在该第一导向模式中的信号的传播，同时 同时授权在多模光纤（4）中传播具有第二引导模式的信号。
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公开(公告)号：US06859585B1
公开(公告)日：2005-02-22
申请号：US10601864
申请日：2003-06-24
CPC分类号： G02B6/02119 , G02B6/03633 , G02B6/03644 , G02B6/03694
摘要： An optical filter comprising a slanted Bragg grating inscribed in an optical fiber portion comprising a core having a refractive index n1 and a radius Rcore and a cladding having an average refractive index n2 lower than n1 and a radius Rcladding, the core and the cladding of the fiber being doped with a photosensitive dopant in the fiber portion comprising the Bragg grating, which filter is characterized in that, in the fiber portion comprising the Bragg grating, the photosensitivity of the cladding is greater than the photosensitivity of the core and the cladding includes an index step area having a refractive index n3 greater than n2 and less than n1, said index step area having a width L defined by an inside radius Rs1 greater than or equal to the radius Rcore of the core and an outside radius Rs2 less than or equal to the radius Rcladding of the cladding.
摘要翻译： 一种光学滤波器，包括内插在光纤部分中的倾斜布拉格光栅，该光纤部分包括具有折射率n1和半径Rcore的芯和具有低于n1的平均折射率n2的包层和半径Rcladding，芯和包层 纤维在包括布拉格光栅的光纤部分中掺杂有光敏掺杂剂，该滤光器的特征在于，在包含布拉格光栅的光纤部分中，包层的光敏性大于芯的光敏性，并且包层包括 具有大于n2且小于n1的折射率n3的折射率阶梯区域，所述折射台阶区域具有由大于或等于芯部的半径Rcore的内部半径Rs1和小于或等于的外部半径Rs2限定的宽度L 到包层的半径Rcladding。
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公开(公告)号：US06760518B2
公开(公告)日：2004-07-06
申请号：US10036448
申请日：2002-01-07
IPC分类号： G02B634
CPC分类号： G02B6/02104 , C03C25/106 , G02B6/021 , G02B6/02119 , G02B6/266
摘要： The present invention relates to a fiber grating filter optical waveguide device, comprising an optical fiber with an optical filter, both consisting essentially of silica, whereby said optical filter has an area with a grating region, wherein said area with a grating region is covered with a layer comprising a material having a refractive index which is the same or higher than the refractive index of the material of the optical fiber. The variation of the physic-chemical nature of said material allows to match the changes in the refractive index of the optical fiber of the optical filter when specific requirements for a high transmission spectrum of the filter are required.
摘要翻译： 本发明涉及一种光纤光栅滤光器光波导器件，其包括具有光学滤波器的光纤，两者都基本上由二氧化硅组成，由此所述滤光器具有带有光栅区域的区域，其中具有光栅区域的所述区域被覆盖 包括具有与光纤的材料的折射率相同或更高的折射率的材料的层。 当需要对过滤器的高透射光谱的特定要求时，所述材料的物理化学性质的变化允许匹配滤光器的光纤的折射率的变化。
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公开(公告)号：US06937789B2
公开(公告)日：2005-08-30
申请号：US10377874
申请日：2003-03-04
CPC分类号： G02B6/14 , G02B6/1228 , G02B6/305
摘要： An optical mode converter comprising an optical guide able to transmit an optical signal in at least one guided mode, characterised in that the optical guide comprises a photosensitive zone inducing a specific index profile along a section of the guide, the said index profile simultaneously defining a longitudinal adiabatic transition and a transverse distribution of the guided mode or modes so as to deconfine the fundamental mode and to maximise the overlap with a higher-order mode.
摘要翻译： 一种光学模式转换器，包括能够以至少一种导向模式传输光信号的光导，其特征在于，所述光导包括感光区域，沿着所述引导件的一部分引导特定的折射率分布，所述索引分布同时限定 纵向绝热过渡和引导模式或模式的横向分布，以便去除基本模式并最大化与高阶模式的重叠。
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10.发明授权公开(公告)号：US06915042B2
公开(公告)日：2005-07-05
申请号：US10217426
申请日：2002-08-14
申请人： Hedi Labidi , Carlos De Barros , Isabelle Riant
发明人： Hedi Labidi , Carlos De Barros , Isabelle Riant
IPC分类号： G02B6/34
CPC分类号： G02B6/02109 , G02B6/0208 , G02B6/02133
摘要： The present invention relates to the field of optical fiber telecommunications. More specifically, the subject of the invention is a slanted Bragg grating optical fiber and a process for manufacturing such a fiber. The slanted Bragg grating optical fiber of longitudinal axis Z has slanted Bragg gratings photowritten in said fiber and having refractive index modulations along said axis Z, inclined at a same writing angle with respect to a normal plane to said axis Z and defining planes called writing planes forming the same angle than the writing angle with said normal plane, each writing plane forming with others writing planes specific angles called angles of rotation about said axis Z.
摘要翻译： 本发明涉及光纤通信领域。 更具体地，本发明的主题是倾斜的布拉格光栅光纤和用于制造这种光纤的方法。 纵向轴线Z的倾斜布拉格光栅光纤具有在所述光纤中照相印刷并具有沿所述轴线Z的折射率调制的倾斜布拉格光栅，相对于所述轴线Z的法线平面以相同的书写角度倾斜，并且限定称为写入平面的平面 形成与所述普通平面的写入角度相同的角度，每个书写平面与其他书写平面形成称为围绕所述轴线Z的旋转角度的旋转角度。
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