公开(公告)号：US06278816B1

公开(公告)日：2001-08-21

申请号：US09539632

申请日：2000-03-30

Applicant: Michael R. Keur ,  James H. Fisher ,  Douglas W. Anthon ,  Kevin L. Sweeney

Inventor： Michael R. Keur ,  James H. Fisher ,  Douglas W. Anthon ,  Kevin L. Sweeney

IPC: G02B626

CPC classification number: G02B6/03661 ,  C03B37/01211 ,  C03B37/01838 ,  C03B37/027 ,  C03B2201/02 ,  C03B2201/12 ,  C03B2201/28 ,  C03B2201/34 ,  C03B2201/36 ,  C03B2201/40 ,  C03B2203/12 ,  C03B2203/22 ,  G02B6/03622 ,  G02B6/105 ,  H01S3/06708 ,  H01S3/06729

Abstract: Systems and methods for suppressing cladding modes at the signal wavelength in an optical fiber system utilizing an optical amplifier without perturbing the pump wavelength. An outer cladding of the gain fiber is removed providing a short section of a single mode fiber that does not guide the higher order modes, thus attenuating the higher order modes. Therefore, this system eliminates unwanted noise. In an embodiment, the modes are filtered at the end of the gain section of the optical fiber before splicing to an input fiber. Hydro florate etching can be utilized to remove the outer cladding. The resulting fiber maintains fundamental mode propagation and no mode mixing occurs while losing the higher order modes eliminating the noise.

Abstract translation: 在利用光放大器的光纤系统中抑制信号波长的包层模式而不干扰泵浦波长的系统和方法。 除去提供增益光纤的外包层，提供不引导较高阶模的单模光纤的短截面，从而衰减高阶模。 因此，该系统消除了不必要的噪音。 在一个实施例中，在与输入光纤拼接之前，在光纤的增益部分的末端对这些模式进行滤波。 可以采用浮雕蚀刻来去除外包层。 所得到的光纤保持基本模式传播，并且在丢失高阶模式消除噪声的同时发生模式混合。

公开(公告)号：US5742722A

公开(公告)日：1998-04-21

申请号：US791428

申请日：1997-01-27

Applicant: Katsuyuki Imoto

Inventor： Katsuyuki Imoto

IPC: C03B37/012 ,  G02B6/036 ,  G02B6/04 ,  H01S3/067 ,  G02B6/02

CPC classification number: G02B6/03666 ,  C03B37/01222 ,  G02B6/02042 ,  G02B6/03611 ,  G02B6/03644 ,  G02B6/04 ,  H01S3/06708 ,  C03B2201/02 ,  C03B2201/31 ,  C03B2201/34 ,  C03B2201/36 ,  C03B2203/22 ,  C03B2203/34 ,  G02B6/02004 ,  G02B6/03694 ,  G02B6/29377 ,  H01S3/06729 ,  H01S3/06737

Abstract: A rare earth element-doped multiple-core optical fiber 31 has a bundle of cores 32-1.about.32-7 co-doped with Er and Al, primary cladding layers 33 covering each core, and an outer cladding layer 34 covering all cores 32-1.about.32-7, wherein one core 32-1 being positioned substantially on a central axis of the outer cladding layer and surrounded by other six cores 32-2.about.32-7. A core diameter Dc of the center core 32-1 is smaller than a core diameter Do of each peripheral core 32-2.about.32-7. The power of both signal light (1.53 .mu.m.about.1.57 .mu.m wavelength bands) and pumping light (0.98 .mu.m or 1.48 .mu.m band) propagating through the center core 32-1 becomes lower and the power propagating through each core 32-1.about.32-7 is equalized, and the flatter characteristics of gain to wavelength are obtained.

Abstract translation: 稀土元素掺杂多芯光纤31具有与Er和Al共掺杂的芯32-1差分32-7，覆盖每个芯的初级包层33和覆盖所有芯32的外包层34 -1差异32-7，其中一个芯32-1基本上位于外包层的中心轴上并被其它六个芯32-2差异32-7包围。 中心芯32-1的芯直径Dc小于每个外围芯32-2差异32-7的芯径Do。 通过中心芯32-1传播的信号光（1.53μm差异1.57μm波长带）和泵浦光（0.98μm或1.48μm带）的功率变得较低，并且通过每个芯32-1传播的功率 差值32-7相等，获得了波长增益的平坦特性。

公开(公告)号：US5703987A

公开(公告)日：1997-12-30

申请号：US695493

申请日：1996-08-12

Applicant: Katsuyuki Imoto

Inventor： Katsuyuki Imoto

IPC: C03B37/012 ,  G02B6/036 ,  G02B6/04 ,  H01S3/067 ,  G02B6/02

CPC classification number: G02B6/03666 ,  C03B37/01222 ,  G02B6/02042 ,  G02B6/03611 ,  G02B6/03644 ,  G02B6/04 ,  H01S3/06708 ,  C03B2201/02 ,  C03B2201/31 ,  C03B2201/34 ,  C03B2201/36 ,  C03B2203/22 ,  C03B2203/34 ,  G02B6/02004 ,  G02B6/03694 ,  G02B6/29377 ,  H01S3/06729 ,  H01S3/06737

Abstract: A rare earth element-doped multiple-core optical fiber 31 has a bundle of cores 32-1.about.32-7 co-doped with Er and Al, primary cladding layers 33 covering each core, and an outer cladding layer 34 covering all cores 32-1.about.32-7, wherein one core 32-1 being positioned substantially on a central axis of the outer cladding layer and surrounded by other six cores 32-2.about.32-7. A core diameter Dc of the center core 32-1 is smaller than a core diameter Do of each peripheral core 32-2.about.32-7. The power of both signal light (1.53 .mu.m.about.1.57 .mu.m wavelength bands) and pumping light (0.98 .mu.m or 1.48 .mu.m band) propagating through the center core 32-1 becomes lower and the power propagating through each core 32-1.about.32-7 is equalized, and the flatter characteristics of gain to wavelength are obtained.

Abstract translation: 稀土元素掺杂多芯光纤31具有与Er和Al共掺杂的芯32-1差分32-7，覆盖每个芯的初级包覆层33和覆盖所有芯32的外包层34 -1差异32-7，其中一个芯32-1基本上位于外包层的中心轴上并被其它六个芯32-2差异32-7包围。 中心芯32-1的芯直径Dc小于每个外围芯32-2差异32-7的芯径Do。 通过中心芯32-1传播的信号光（1.53μm差异1.57μm波长带）和泵浦光（0.98μm或1.48μm带）的功率变得较低，并且通过每个芯32-1传播的功率 差值32-7相等，获得了波长增益的平坦特性。

公开(公告)号：US5689578A

公开(公告)日：1997-11-18

申请号：US318848

申请日：1994-10-25

Applicant: Ryozo Yamauchi ,  Kuniharu Himeno ,  Minoru Sawada ,  Fumio Suzuki ,  Kazuhiko Aikawa ,  Tetsuo Nozawa ,  Shigefumi Yamasaki

Inventor： Ryozo Yamauchi ,  Kuniharu Himeno ,  Minoru Sawada ,  Fumio Suzuki ,  Kazuhiko Aikawa ,  Tetsuo Nozawa ,  Shigefumi Yamasaki

IPC: C03B37/012 ,  G02B6/10 ,  G02B6/255 ,  G02B6/28 ,  G02B6/34 ,  H01S3/067

CPC classification number: G02B6/024 ,  C03B37/01217 ,  C03B37/01222 ,  G02B6/02042 ,  G02B6/2843 ,  H01S3/06708 ,  C03B2201/31 ,  C03B2201/36 ,  C03B2203/02 ,  C03B2203/12 ,  C03B2203/22 ,  C03B2203/30 ,  C03B2203/31 ,  C03B2203/34 ,  G02B6/2551 ,  G02B6/2552

Abstract: The polarization-maintaining optical fiber 10 of the present invention is designed so that a plurality of core portions 12a,12b which have a high refractive index is provided in parallel along a single diameter direction in the cross section of the optical fiber, these core portions 12a,12b cooperating to propagate a single fundamental mode. In the production method for the polarization-maintaining optical fiber of the present invention, a plurality of holes 22 are formed longitudinally in parallel along a single diameter direction of a glass rod 21 having a low refractive index which forms the cladding, glass rods 23 for core use having a high refractive index which form the core portions are inserted into these holes 22, heating to form a unitary body is carried out, creating a preform which is then drawn. Further, the rare-earth-doped polarization-maintaining optical fiber of the present invention uses a rare earth element to dope the optical waveguide portion of the polarization-maintaining optical fiber, and can be employed in a light amplifier or laser oscillator. Moreover, the polarization-maintaining optical fiber coupler of the present invention is formed by bringing two or more polarization maintaining optical fibers into contact, heating, fusing and elongating them, and heating the vicinity of the connection point before and after connection.

Abstract translation: PCT No.PCT / JP94 / 00300 Sec。 371日期：1994年10月25日 102（e）日期1994年10月25日PCT 1994年2月24日PCT PCT。 第WO94 / 17714号公报 日期1994年9月1日本发明的偏振波保持光纤10被设计成使得在光学部件的横截面中沿着单一直径方向平行设置多个具有高折射率的芯部12a，12b 光纤，这些芯部分12a，12b协作传播单个基本模式。 在本发明的偏振波保持光纤的制造方法中，多个孔22沿着形成包层的折射率低的玻璃棒21的单一直径方向纵向平行地形成，玻璃棒23用于 形成芯部的具有高折射率的芯用途被插入到这些孔22中，进行加热以形成整体，形成预先形成的预成型体。 此外，本发明的稀土掺杂偏振保持光纤使用稀土元素来掺杂保偏光纤的光波导部分，并且可以用在光放大器或激光振荡器中。 此外，本发明的偏振保持光纤耦合器是通过使两个或更多个保偏光纤接触，加热，熔化和拉伸，以及在连接之前和之后加热连接点附近而形成的。

公开(公告)号：US5622750A

公开(公告)日：1997-04-22

申请号：US331460

申请日：1994-10-31

Applicant: Arnd H. Kilian ,  John B. MacChesney ,  Theodore F. Morse

Inventor： Arnd H. Kilian ,  John B. MacChesney ,  Theodore F. Morse

IPC: G02B6/13 ,  C01B21/48 ,  C03B19/01 ,  C03B19/12 ,  C03B19/14 ,  C03C17/02 ,  C23C16/448 ,  C23C16/453 ,  C23C26/00 ,  C30B29/06 ,  G02B6/12 ,  B05D5/06 ,  B05D3/08

CPC classification number: C03B19/1423 ,  C03C17/02 ,  C23C16/4486 ,  C23C16/453 ,  C03B2201/10 ,  C03B2201/34 ,  C03B2201/36 ,  C03B2201/50 ,  C03B2207/06 ,  C03B2207/20 ,  C03B2207/32 ,  C03B2207/34

Abstract: A new method for the manufacture of glass films on substrates involves the flame reaction of an aerosol comprised of droplets of a solution containing all the precursors for the glass. A solution containing the precursors for all oxide components is atomized, and the resulting droplets are reacted in a flame to form spherical glass particles which are deposited on a heated substrate. By moving the substrate through the flame, a homogeneous deposit is achieved. Subsequent heat treatment in a furnace sinters the porous particle layer into a clear glass. The method has been successfully employed for the formation of sodium borosilicate glass films on silicon substrates and rare earth-doped multicomponent glass films for active devices.

Abstract translation: 用于在基材上制造玻璃膜的新方法涉及由包含玻璃的所有前体的溶液的液滴组成的气溶胶的火焰反应。 将含有所有氧化物组分的前体的溶液雾化，并将所得液滴在火焰中反应形成沉积在加热的基底上的球形玻璃颗粒。 通过移动基板通过火焰，实现均匀的沉积。 随后在炉中的热处理将多孔颗粒层烧结成透明玻璃。 该方法已经成功地用于在硅衬底上形成硼硅酸钠玻璃膜和用于有源器件的稀土掺杂多组分玻璃膜。

公开(公告)号：US5609665A

公开(公告)日：1997-03-11

申请号：US521934

申请日：1995-08-31

Applicant: Allan J. Bruce ,  David J. DiGiovanni

Inventor： Allan J. Bruce ,  David J. DiGiovanni

IPC: G02B6/00 ,  C03B37/012 ,  C03B37/014 ,  C03C13/04

CPC classification number: C03B37/0124 ,  C03B37/01245 ,  C03B37/01274 ,  C03B2201/02 ,  C03B2201/31 ,  C03B2201/32 ,  C03B2201/34 ,  C03B2201/36 ,  C03B2201/50 ,  C03B2201/86

Abstract: The disclosed method of making a mixed glass optical fiber exemplarily comprises providing a high-silica tube, and causing molten non-high silica glass to flow into the bore of the tube by application of a pressure differential. In order to prevent cracking, the tube desirably has an outer diameter/inner diameter ratio of at least 5, preferably about 10 or even more, and an inner diameter of at most 1 min. In a preferred embodiment, a conventional SiO.sub.2 tube is partially collapsed to an inner diameter less than 1 mm, a quantity of a non-high-silica glass is placed in a neck of the partially collapsed tube and heated such that molten glass communicates with the reduced-diameter portion of the bore and can be drawn into the reduced-diameter portion by means of a vacuum. The resulting mixed glass body is then further stretched to result in a core rod of core diameter at most 0.3 min. After overcladding the core rod with SiO.sub.2, fiber is drawn from the thus produced preform. A thus produced fiber with SiO.sub.2 cladding and SiO.sub.2 -Al.sub.2 O.sub.3 -La.sub.2 O.sub.3 -Er.sub.2 O.sub.3 core was used as an optical fiber amplifier and provided high gain.

Abstract translation: 公开的制造混合玻璃光纤的方法示例性地包括提供高硅胶管，并且使熔融的非高硅石玻璃通过施加压差而流入管的孔中。 为了防止开裂，管理想地具有至少5，优选约10甚至更​​大，内径至多1分钟的外径/内径比。 在一个优选实施例中，常规的SiO 2管部分地塌陷到小于1mm的内径，将非高硅石玻璃的量放置在部分塌缩的管的颈部中并加热使得熔融玻璃与 孔的缩径部分并且可以通过真空被拉入缩径部分。 然后将得到的混合玻璃体进一步拉伸，得到芯直径至多0.3分钟的芯棒。 在用SiO 2包覆芯棒之后，从如此制备的预制件中拉出纤维。 将由此制得的具有SiO 2包层的纤维和SiO 2 -Al 2 O 3 -Sa 2 O 3 -Er 2 O 3核心用作光纤放大器并提供高增益。

公开(公告)号：US5570448A

公开(公告)日：1996-10-29

申请号：US476445

申请日：1995-06-07

Applicant: Katsuyuki Imoto ,  Kazuo Koya

Inventor： Katsuyuki Imoto ,  Kazuo Koya

IPC: G02B6/04 ,  C03B37/012 ,  C03B37/028 ,  G02B6/00 ,  G02B6/02 ,  H01S3/06 ,  H01S3/067 ,  H01S3/07 ,  H01S3/10 ,  H01S3/17

CPC classification number: C03B37/01222 ,  G02B6/02042 ,  H01S3/06708 ,  C03B2201/10 ,  C03B2201/28 ,  C03B2201/31 ,  C03B2201/36 ,  C03B2203/12 ,  C03B2203/29 ,  C03B2203/34 ,  H01S3/06729 ,  H01S3/06754

Abstract: At least three elementary optical fibers are covered with a jacket layer. Each of the elementary optical fibers has a core of a first refractive index doped with at least one rare earth element and Al, and a cladding layer of a second refractive index lower than the first refractive index for covering the core. A value of (1+2t/Dw) is ranged to be 1.1 to 2.5, where t is a thickness of the cladding layer, and Dw is an outer diameter of the core, and a doping amount of Al is at least 1 weight %. The at least three elementary optical fibers are inserted into a jacket tube, and the elementary optical fibers and the jacket tube are heated to be welded at contact surfaces thereof by vacuum-drawing air from interstices of the elementary optical fibers and the jacket tube. Thus, a preform is obtained, and the preform is heated to be drawn. Consequently, a rare earth element-doped multiple-core optical fiber is fabricated. The rare earth element-doped multiple-core optical fiber is used to amplify a signal light to be propagated therethrough by receiving an excitation light.

Abstract translation: 至少三个基本光纤被护套层覆盖。 每个基本光纤具有掺杂有至少一种稀土元素和Al的第一折射率的芯和具有低于用于覆盖芯的第一折射率的第二折射率的包层。 （1 + 2t / Dw）的值为1.1〜2.5，其中t为包层的厚度，Dw为芯的外径，Al的掺杂量为1重量％以上， 。 将至少三个基本光纤插入护套管中，并且通过从基本光纤和护套管的间隙抽真空来加热基本光纤和套管，以在其接触表面处焊接基本光纤和护套。 因此，获得预制件，并将预成型件加热以拉伸。 因此，制造了稀土元素掺杂多芯光纤。 稀土元素掺杂多芯光纤用于通过接收激发光来放大要传播的信号光。

公开(公告)号：US5278850A

公开(公告)日：1994-01-11

申请号：US960470

申请日：1992-12-16

Applicant: Benjamin J. Ainslie ,  Susan P. Craig-Ryan

Inventor： Benjamin J. Ainslie ,  Susan P. Craig-Ryan

IPC: C03C3/04 ,  C03B37/018 ,  C03C4/00 ,  C03C4/12 ,  C03C13/04 ,  H01S3/06 ,  H01S3/067 ,  H01S3/07 ,  H01S3/16 ,  H01S3/17 ,  H01S3/30

CPC classification number: C03C13/045 ,  C03B37/01838 ,  C03C13/046 ,  C03C4/0071 ,  H01S3/06716 ,  C03B2201/28 ,  C03B2201/31 ,  C03B2201/36 ,  C03B2203/23 ,  H01S3/0672 ,  H01S3/06729 ,  H01S3/1693

Abstract: Optical wave-guides, e.g. fibres, for use as photonic amplifiers have a path region partly or, preferably, wholly composed as a silica/germania glass with 0.1 to 5000 ppm mole of Er.sup.3+ as a lasing additive and alumina to adjust the bandwidth, the Ge:Al mole ratio being more than 2.8, e.g. 1:0.001 to 0.25. It is surprising that low amounts of alumina have a useful and significant effect on the lasing bandwidth whereby frequency division multiplex is facilitated.

Abstract translation: PCT No.PCT / GB91 / 00770 Sec。 371日期：1992年12月16日 102（e）日期1992年12月16日PCT提交1991年5月16日PCT公布。 出版物WO91 / 17966 日期：1991年11月28日。 用作光子放大器的光纤具有部分或优选完全构成作为二氧化硅/锗纳米玻璃的路径区域，具有0.1至5000ppm摩尔Er 3+作为激光添加剂和氧化铝以调节带宽，Ge：Al摩尔比为 超过2.8，例如 1：0.001〜0.25。 令人惊奇的是，少量的氧化铝对激光带宽具有有用和显着的影响，从而便于频分复用。

公开(公告)号：US5059230A

公开(公告)日：1991-10-22

申请号：US468433

申请日：1990-01-22

Applicant: Linn F. Mollenauer ,  Jay R. Simpson ,  Kenneth L. Walker

Inventor： Linn F. Mollenauer ,  Jay R. Simpson ,  Kenneth L. Walker

IPC: C03B37/012 ,  C03B37/018 ,  C03C13/04 ,  G02B6/00

CPC classification number: C03C13/045 ,  C03B37/01211 ,  C03B2201/04 ,  C03B2201/34 ,  C03B2201/36 ,  C03B2203/22 ,  Y10S65/90

Abstract: Reproducible doped optical fiber preforms having a predetermined dopant concentration level are fabricated by inserting a doped filament into a completed preform prior to consolidation and final collapse so that the filament and dopant materials are centrally located in the core region upon formation of the preform. Doped fiber is drawn from the doped preform using standard fiber drawing techniques.

公开(公告)号：US4848998A

公开(公告)日：1989-07-18

申请号：US146378

申请日：1988-01-21

Applicant: Elias Snitzer ,  Richard P. Tumminelli

Inventor： Elias Snitzer ,  Richard P. Tumminelli

IPC: G02B6/00 ,  C03B8/00 ,  C03B20/00 ,  C03B37/012 ,  C03B37/014 ,  C03B37/027 ,  C03C13/04

CPC classification number: C03C13/045 ,  C03B37/01211 ,  C03B37/027 ,  C03C13/046 ,  C03B2201/34 ,  C03B2201/36 ,  C03B2201/40 ,  C03B2201/50 ,  C03B2201/54

Abstract: A method for fabricating optical fibers having a rare-earth doped core and a fused silica cladding includes inserting a rare-earth doped soft glass rod into a fused silica tube, the ratio of the outer diameter (OD) to the inner diameter (ID) of the fused silica tube being at least 2 and as large as 50; heating the rod and tube combination in a furnace to selectively volatilize volatile constituents of the soft glass rod which are responsible for the low softening point so that the final composition of the core consists predominantly of SiO.sub.2 and the desired dopants such as rare earths, alkaline earths or other low vapor pressure materials; and drawing the perform into an optical fiber.