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公开(公告)号：US5005175A
公开(公告)日：1991-04-02
申请号：US441495
申请日：1989-11-27
CPC分类号： H01S3/06754 , H01S3/0672
摘要： This invention is a rare earth doped optical amplifier with increased gain and lowered pump thresholds. The amplifying scheme is based on a 3 level lasing system rather than the more prevalent 4 level lasing system. Additionally, the transmission mode of the optical fiber at the pump wavelength has a radius which is substantially equal to or greater than the radius of the distribution profile of the rare earth ions in the fiber amplifier core. With the inventive amplifier, a gain of 37 dB and a saturation power of 11.3 dBm has been obtained with only 54 mW of launch power at .lambda.=1.49 .mu.m.
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公开(公告)号：US5187759A
公开(公告)日：1993-02-16
申请号：US788952
申请日：1991-11-07
申请人： David J. DiGiovanni , Clinton R. Giles , Stuart A. Kramer , Gerald Nykolak , Herman M. Presby , Jay R. Simpson
发明人： David J. DiGiovanni , Clinton R. Giles , Stuart A. Kramer , Gerald Nykolak , Herman M. Presby , Jay R. Simpson
CPC分类号： H01S3/094003 , H01S3/08022 , H01S3/094069
摘要： Indiscriminately exciting the modes of a multi-mode optical fiber amplifier is avoided by an optical fiber amplifier design in which the excitation of pump modes in the core of a multi-mode fiber is controlled by controlling the pump light launching. The pump light is directed substantially along the center axis of a multi-mode fiber within a predetermined launch angle. Rather than exciting all modes, only lower order modes are affected.
摘要翻译： 通过光纤放大器设计避免了多模光纤放大器的模式的不加选择地激发，其中通过控制泵浦光发射来控制多模光纤的核心中的泵浦模式的激发。 泵浦光在预定的发射角度内基本上沿着多模光纤的中心轴线引导。 而不是激发所有模式，只有较低阶模式受到影响。
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公开(公告)号：US5572618A
公开(公告)日：1996-11-05
申请号：US274597
申请日：1994-07-13
摘要： A passive optical attenuating device comprises an optical waveguide adapted to receive optical radiation and absorb, along its length, at least 0.2 dB/m of the optical radiation. The waveguide section may be coupled to a low-loss optical fiber so as to receive an optical signal to be attenuated therefrom. In accordance with one aspect of the invention, at least one region of the waveguide is doped with a transition metal to achieve a pre-selected absorptivity per unit length so that a controlled degree of attenuation can be achieved.
摘要翻译： 无源光衰减装置包括适于接收光辐射并沿其长度吸收至少0.2dB / m的光辐射的光波导。 波导部分可以耦合到低损耗光纤，以便接收要从其衰减的光信号。 根据本发明的一个方面，波导的至少一个区域掺杂有过渡金属以实现每单位长度的预选吸收率，从而可以实现受控程度的衰减。
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4.发明授权Intra-cavity optical four-wave mixer and optical communications system using the same 失效腔内光学四波混频器和光通信系统使用相同
公开(公告)号：US5550671A
公开(公告)日：1996-08-27
申请号：US397516
申请日：1995-03-02
IPC分类号： G02F1/35 , H01S3/06 , H01S3/067 , H01S3/07 , H04B10/12 , H04B10/13 , H04B10/135 , H04B10/14 , H01S3/00
CPC分类号： H01S3/067 , H01S3/06708 , G02F1/3538 , H01S3/06754
摘要： In accordance with the invention, an optical four-wave mixer for producing a phase-conjugated signal comprises a source of optical input signals, a fiber laser for receiving the signals, and a detector for selectively detecting the frequency-shifted signals produced by four-wave mixing. The laser can be a rare-earth doped fiber laser with a fiber cavity phase matched to the input signals. The frequency-shifted output signals have an inverted spectral waveform as compared with the input signals. The mixer can be made in compact form with a cavity length as small as 100 m and can provide inverted signals at the same intensity as the input signals, making the mixer particularly useful for providing spectral inversion in an optical communications system.
摘要翻译： 根据本发明，用于产生相位共轭信号的光学四波混频器包括光输入信号源，用于接收信号的光纤激光器和用于选择性地检测四通道信号产生的频移信号的检测器， 波混合。 激光器可以是掺杂光纤的稀土激光器，其光纤腔相位与输入信号相匹配。 与输入信号相比，频移输出信号具有反向的频谱波形。 混合器可以制成具有小至100μm的空腔长度的紧凑形式，并且可以以与输入信号相同的强度提供反相信号，使得混频器对于在光通信系统中提供频谱反转特别有用。
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公开(公告)号：US4666247A
公开(公告)日：1987-05-19
申请号：US699669
申请日：1985-02-08
申请人： John B. MacChesney , Jay R. Simpson
发明人： John B. MacChesney , Jay R. Simpson
IPC分类号： G02B6/00 , C03B37/018 , C03C13/04 , G02B6/16
CPC分类号： C03B37/01807 , C03B37/01884 , C03C13/045 , C03C13/046 , C03B2201/32 , C03B2201/36 , C03B2201/50 , C03B2201/54
摘要： Silica-based optical fiber comprising at least a core and a cladding surrounding the core, both core and cladding material produced by a vapor phase deposition process. The core and/or the cladding comprise at least two substituents, one chosen from Li, Na, K, Rb, Cs, Be, Mg, Ca, Sr, Ba, and the 4f-type rare earths (the "modifiers"), and the other chosen from B, Al, Ga, In, P, As, and Sb (the "homogenizers"). The maximum concentration of the substituents in the fiber is such that 3
摘要翻译： 基于二氧化硅的光纤至少包括芯和围绕芯的包层，通过气相沉积工艺产生的芯和包层材料。 芯和/或包层包含至少两个选自Li，Na，K，Rb，Cs，Be，Mg，Ca，Sr，Ba和4f型稀土（“改性剂”）的取代基， 另一个选自B，Al，Ga，In，P，As和Sb（“均化器”）。 纤维中取代基的最大浓度使得3 <（n1M + n2H）/ H <20，优选<10，其中n1和n2分别是改性剂和均化器的化合价，M和H是 浓度，摩尔％，分别为改性剂和均化剂。 根据本发明的纤维包含至少50，通常大于80重量％的SiO 2，并且还具有至少0.2摩尔％，优选至少1摩尔％的最大改性剂浓度。 均化器的存在经常允许实现导致现有技术纤维中的相分离或结晶的改性剂浓度。 还公开了一种制造光纤的方法，该方法包括形成具有较高蒸气压的金属卤化物络合物。
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公开(公告)号：US4529426A
公开(公告)日：1985-07-16
申请号：US516000
申请日：1983-07-22
IPC分类号： G02B6/00 , C03B37/012 , C03C13/04 , G02B6/02 , G02B6/024 , G02B6/10 , C03B37/075
CPC分类号： G02B6/105 , C03B37/01217 , C03B37/01225 , C03C13/04 , C03C13/045 , C03B2201/02 , C03B2201/10 , C03B2201/12 , C03B2201/31 , C03B2203/02 , C03B2203/04 , C03B2203/22 , C03B2203/30
摘要： The present invention relates to a technique for producing polarization-preserving and single polarization optical fibers. As disclosed, high birefringence is introduced into the preform by deforming the fiber preform such that a cladding layer becomes flat and highly conformable, while the core remains hard and substantially round. In particular, a cladding layer with a relatively low melting point is utilized such that when the preform is heated the cladding becomes liquified while the core remains solid. The preform may then be deformed so that the cladding layer is substantially flattened. Standard drawing techniques may then be utilized to form polarization-preserving fibers and single polarization fibers from the preform.
摘要翻译： 本发明涉及一种用于制造偏振光保护和单偏振光纤的技术。 如所公开的那样，通过使纤维预成型件变形使得包层变得平坦并高度贴合，同时核保持坚硬且基本上圆形，将高双折射率引入预成型体。 特别地，利用具有相对较低熔点的包覆层，使得当预制件被加热时，包层变得液化，同时核保持固体。 然后可以使预成型件变形，使得包层基本上变平。 然后可以利用标准绘制技术从预制件形成偏振保留纤维和单极化纤维。
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7.发明授权
公开(公告)号：US4830463A
公开(公告)日：1989-05-16
申请号：US153746
申请日：1988-02-08
IPC分类号： G02B6/02 , C03B37/018 , C03C3/06 , C03C13/04 , G02B6/10
CPC分类号： G02B6/03611 , C03B37/01807 , C03C13/04 , C03C3/06 , G02B6/03627 , G02B6/105 , C03B2201/28 , C03B2201/31 , C03B2201/32 , C03B2203/30 , C03C2201/28 , C03C2201/32 , C03C2203/44
摘要： It has been discovered that fused silica doped with approximately equimolar amounts of Al and P, has advantageous properties that make such co-doped glass useful in a variety of applications, including optical fiber, especially polarization-maintaining optical fiber, and planar waveguides in optical and optoelectronic devices. In particular, such co-doped fused silica can have a refractive index that is lower than, or at least not significantly greater than, that of pure fused silica, even though both Al and P individually are known up-dopants for silica. The co-doped fused silica also can have a relatively low working temperature, while otherwise maintaining many of the desirable properties of fused silica, e.g., chemical inertness and relatively low coefficient of thermal expansion.
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公开(公告)号：US4762387A
公开(公告)日：1988-08-09
申请号：US832166
申请日：1986-02-21
CPC分类号： G02B6/3839 , G02B6/30 , G02B6/3812 , G02B6/3885 , G02B6/423
摘要： An array connector for optical fibers is disclosed which utilizes a plurality of grooves formed in the array substrate to hold the fibers. The connector is to be used with fibers having at least one sectional view substantially flattened side, where polarization maintaining fibers may be formed to assume this shape. The grooves are formed to have a relatively flat bottom surface so that the flattened side of the fiber is positioned to coincide with this flat bottom surface. The grooves themselves may have any desired cross section. A coverplate with corresponding grooves may be utilized to form an interlocking structure to prevent any lateral movement by the fibers. When used in association with polarization maintaining fibers, the connector of the present invention will preserve the polarization through the connection by preventing any axial angular motion. The connector may be used to align a plurality of fibers with another plurality of fibers or, alternatively, with a plurality of optical waveguides.
摘要翻译： 公开了一种用于光纤的阵列连接器，其利用形成在阵列基板中的多个槽来保持光纤。 该连接器将与具有至少一个截面视图基本平坦的侧面的纤维一起使用，其中可以形成保偏纤维以呈现该形状。 凹槽形成为具有相对平坦的底表面，使得纤维的平坦化侧面被定位成与该平坦的底部表面重合。 凹槽本身可以具有任何期望的横截面。 可以使用具有相应凹槽的盖板来形成互锁结构，以防止纤维的任何横向移动。 当与偏振维持纤维相关联使用时，本发明的连接器将通过防止任何轴向角运动来保持通过连接的偏振。 连接器可以用于将多根光纤与另外多根光纤对准，或者与多个光波导对准。
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9.发明授权
公开(公告)号：US4302230A
公开(公告)日：1981-11-24
申请号：US143845
申请日：1980-04-25
IPC分类号： C03B37/018 , C03B37/07 , C03B37/075
CPC分类号： C03B37/018 , C03B37/01846 , C03B37/01861 , Y02P40/57
摘要： This invention is a technique for fabricating optical fibers using thermophoretically enhanced particle deposition. In this process a cooling liquid such as water is poured over the substrate upon which deposition occurs in order to thermophoretically enhance the deposition. It has been found that despite the significant thermal shock that such water imparts to the tube, and despite previous difficulty with cracking because of thermal stresses which may develop, especially upon cooling, applicants have found that structural integrity may be maintained and enhanced deposition rates result.
摘要翻译： 本发明是使用热溶胶增强的颗粒沉积来制造光纤的技术。 在此过程中，将诸如水的冷却液倒在衬底上，在该衬底上发生沉积，以便热电泳增强沉积。 已经发现，尽管这种水赋予管的显着的热冲击，并且尽管以前由于可能发展的热应力而导致的开裂的困难，特别是在冷却时，申请人已经发现可以保持结构完整性并且提高沉积速率 。
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公开(公告)号：US5517590A
公开(公告)日：1996-05-14
申请号：US251452
申请日：1994-05-31
CPC分类号： G02B6/2552 , G02B6/2852
摘要： Signal energy in an installed optical fiber is extracted without using a physical connector, by an improved process in which the fiber is bent to within a prescribed range of angles, then controllably heated, and thereafter controllably cooled. The resulting structure exhibits relatively low permanent stress. A fiber end conventionally placed at the bend point receives unusually useful amounts of optical signal which can be routed to optical branch circuits in, for example, a building or a LAN.
摘要翻译： 通过改进的方法将光纤中的信号能量提取而不使用物理连接器，其中光纤弯曲到规定的角度范围内，然后被可控地加热，然后可控地冷却。 所得结构表现出较低的永久应力。 通常放置在弯曲点处的光纤端接收异常有用量的光信号，其可被路由到例如建筑物或LAN中的光分支电路。
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