公开(公告)号：US5087108A

公开(公告)日：1992-02-11

申请号：US553246

申请日：1990-07-13

Applicant: Giorgio Grasso ,  Paul L. Scrivener ,  Andrew P. Appleyard

Inventor： Giorgio Grasso ,  Paul L. Scrivener ,  Andrew P. Appleyard

IPC: G02B6/02 ,  G02B6/00 ,  G02B6/28 ,  G02F1/35 ,  H01S3/06 ,  H01S3/067 ,  H01S3/07 ,  H01S3/094 ,  H01S3/10 ,  H01S3/17 ,  H04B10/00 ,  H04B10/06 ,  H04B10/12 ,  H04B10/16

CPC classification number: H01S3/06708 ,  H01S3/06754 ,  G02B2006/2839 ,  H01S2301/04 ,  H01S3/06729 ,  H01S3/06737

Abstract: The invention relates to an optical amplifier, in particular for optical fiber telecommunication lines (1), operating with a transmission signal in a predetermined wavelength range, which amplifier comprises a fluorescent active optical fiber (6) doped with erbium, having two cores (11 and 12, 101 and 102), one (11, 101) of which is connected to a fiber (4) in which a transmission signal to be amplified and a luminous pumping energy are multiplexed, and to an outgoing fiber adapted to transmit the amplified signal, whereas the second core (12, 102) is optically coupled to the first core and is capable of absorbing the spontaneous erbium emission which would constitute a noise source, allowing a signal to be amplified in a wavelength range substantially corresponding to the tolerance range of the commercially available signal laser emitters.

公开(公告)号：US4842403A

公开(公告)日：1989-06-27

申请号：US281963

申请日：1988-12-05

Applicant: Eleanor J. Tarbox ,  Paul L. Scrivener

Inventor： Eleanor J. Tarbox ,  Paul L. Scrivener

IPC: G01K11/12 ,  G01B11/16 ,  G01D21/00 ,  G01K11/32 ,  G01L1/24

CPC classification number: G01L1/242 ,  G01B11/18 ,  G01K11/32

Abstract: An optical fibre sensor 11 has two monomode cores 13,14 arranged in a common cladding 15 to allow cross-talk of optical signals between the cores as a function of strain, temperature and optical wavelength. Optical signals are generated by a generator 16 at two wavelengths, at one of which cross-talk between the cores 13,14 is temperature independent. The generated optical signals are injected into the element 11 via an optical fibre lead 18 having a single monomode core 19 which is connected to one of the cores 13 of the element 11 at one end thereof and after cross-talk between the cores, optical signals are extracted from the element, for example via the same lead 18, and processed to determine temperature and strain at the element.

Abstract translation: 光纤传感器11具有布置在公共包层15中的两个单模芯13,14，以允许芯之间的光信号串扰作为应变，温度和光波长的函数。 光信号由发生器16在两个波长处产生，其中芯13,14之间的串扰是温度无关的。 所生成的光信号经由具有单个单模核心19的光纤引线18注入到元件11中，单芯芯19的一端连接到元件11的芯13中的一个，并且在芯之间的串扰之间，光信号 从元件提取，例如通过相同的引线18进行处理，以确定元件的温度和应变。

公开(公告)号：US4938561A

公开(公告)日：1990-07-03

申请号：US291636

申请日：1988-12-29

Applicant: Giorgio Grasso ,  Eleanor J. Tarbox ,  Paul L. Scrivener

Inventor： Giorgio Grasso ,  Eleanor J. Tarbox ,  Paul L. Scrivener

IPC: G02B6/02 ,  G02B6/34 ,  G02F1/313 ,  G02F1/35 ,  H01S3/067 ,  H01S3/094 ,  H04B10/12 ,  H04B10/13 ,  H04B10/135 ,  H04B10/14

CPC classification number: H01S3/094003 ,  G02F1/3131 ,  H01S3/06708 ,  H01S3/06729 ,  H01S3/06737 ,  H01S3/094011

Abstract: An optical fibre structure usable in amplifying optical signals, comprising a length of optical fibre (1) which includes two uniformally spaced monomode optical cores (2,4) located within a common cladding (6) so as to provide two optical guidance paths, the optical characteristics of at least the cores being different such as to give the two guidance paths different propagation constants the values of which coincide for a predetermined coupling wavelength, one of the cores including a fluorescent material capable of producing stimulated emission. There is also disclosed a method of amplifying an optical signal using such an optical fibre structure, comprising arranging for the wavelength (.lambda..sub.s) of the optical signal, the fluorescent wavelength of said material in said one core, and said predetermined coupling wavelength all to be substantially the same, launching optical pump energy having a different wavelength (.lambda..sub.p) into said one core to pump the fluorescent material, launching the optical signal into the other core so that the optical signal transfers repeatedly between the two cores due to optical coupling and, when in said one core, gives rise to stimulated emission substantially at its own wavelength from the fluorescent material thereby becoming amplified, and extracting the amplified optical signal from the fibre structure when it is in said other core. A device (FIG. 4) using this method is also disclosed.

公开(公告)号：US5218665A

公开(公告)日：1993-06-08

申请号：US954468

申请日：1992-09-30

Applicant: Giorgio Grasso ,  Paul L. Scrivener

Inventor： Giorgio Grasso ,  Paul L. Scrivener

IPC: G02B6/28 ,  G02B6/34 ,  H01S3/067

CPC classification number: H01S3/06754 ,  G02B6/283 ,  G02B6/2835 ,  H01S3/06708 ,  G02B2006/2839 ,  H01S2301/02 ,  H01S2301/04 ,  H01S3/06729 ,  H01S3/06737

Abstract: An optical amplifier for telecommunication lines over which communication signals at a predetermined wavelength are transmitted. The amplifier has portions of two optically coupled fibers, at least one of the fibers being an active fiber, interconnected by a length of active fiber connected to the one fiber of successive portions. Preferably, the active fibers are doped with erbium, and the coupling wavelength of the two fibers is different from the communication signal wavelength so that energy of the spontaneous emission of erbium is transferred from the one fiber to the other fiber and absorbed in the latter permitting amplification of communication signals in a range of wavelengths corresponding to the tolerance range of commercial laser signal emitters.

Abstract translation: 一种用于电信线路的光放大器，通过该光放大器传送预定波长的通信信号。 放大器具有两个光耦合光纤的部分，至少一个光纤是有源光纤，通过连接到连续部分的一个光纤的一段有源光纤互连。 优选地，有源光纤掺杂有铒，并且两个光纤的耦合波长不同于通信信号波长，使得铒的自发发射的能量从一个光纤转移到另一个光纤并在后者中被吸收 在对应于商业激光信号发射器的公差范围的波长范围内的通信信号的放大。

公开(公告)号：US4925269A

公开(公告)日：1990-05-15

申请号：US236038

申请日：1988-08-23

Applicant: Paul L. Scrivener

Inventor： Paul L. Scrivener

IPC: G02B6/02 ,  G02B6/00 ,  G02B6/122 ,  G02B6/28 ,  G02F1/31 ,  G02F1/313

CPC classification number: G02F1/3131

Abstract: An electrically tunable optical fibre structure comprising a length of optical fibre which includes two uniformly spaced monomode optical cores (1,2) located within a common cladding (4) so as to provide two optical guidance paths, the optical characteristics of at least the cores being different such as to give the two guidance paths different propagation constants the values of which coincide for a predetermined wavelength, so that optical energy at said wavelength will repeatedly transfer from one core to the other, characterized in that two electrodes (6,8,20) are provided within the cladding and are located with at least one core between them for applying an electrical field to that core whereby to alter its propagation constant by the electro-optic effect and hence to alter said wavelength, the structure thereby being tunable. Methods of making such a structure are also disclosed.