公开(公告)号：DE69938444D1

公开(公告)日：2008-05-15

申请号：DE69938444

申请日：1999-09-14

Applicant: LUCENT TECHNOLOGIES INC

Inventor： ESPINDOLA ROLANDO PATRICIO ,  STENTZ ANDREW JOHN ,  WAGENER JEFFERSON LYNN

IPC: G02B6/14 ,  G02B6/293 ,  G02B6/02 ,  G02B6/34 ,  G02F1/01 ,  H01S3/067 ,  H04B10/02 ,  H04B10/43

Abstract: An optical fiber grating device (10) including a length of optical fiber having a predetermined fundamental mode effective guide index and a longitudinally tapered region for accessing a fundamental mode of light. The tapered region has a grating (24) with a predetermined light spectral shaping property that shapes the light spectrum of the fundamental mode. A coating (26) surrounds the tapered region (18) of the fiber for modifying the fundamental mode effective guide index of the fiber in order to change the spectral shaping property of the grating.

公开(公告)号：CA2366250C

公开(公告)日：2006-10-03

申请号：CA2366250

申请日：2001-12-27

Applicant: LUCENT TECHNOLOGIES INC

Inventor： DU MEI ,  NIELSEN TORBEN N ,  STENTZ ANDREW JOHN ,  ROTTWITT KARSTEN

IPC: G02F1/35 ,  H04J14/02 ,  H01S3/067 ,  H01S3/094 ,  H01S3/10 ,  H01S3/30 ,  H04B10/2507 ,  H04B10/2543 ,  H04J14/00

Abstract: The use of a co-propagating fiber Raman amplifier in an optical WDM transmission system has been found to be practical in the situation where th e fiber amplifier is operated into depletion and the characteristics of the input signals are controlled to exhibit a reduced integrated relative intensity noise (RIN) ov er the fiber crosstalk bandwidth. In particular, the reduction in the integrated RIN can be achieved by increasing the number of input channels (by adding more messages or simpl y using dummy channels), encoding the data in a particular fashion to reduce the integrated RIN, or decorrelating the plurality of N input signals below a predetermined , relatively low frequency (for example, 2MHz).

公开(公告)号：DE69824493T2

公开(公告)日：2005-08-18

申请号：DE69824493

申请日：1998-07-14

Applicant: LUCENT TECHNOLOGIES INC

Inventor： DIGIOVANNI DAVID JOHN ,  STENTZ ANDREW JOHN

IPC: G02B6/04 ,  G02B6/28 ,  H01S3/06 ,  H01S3/067 ,  H01S3/07 ,  H01S3/094 ,  H01S3/0941 ,  G02B6/26

Abstract: In accordance with the invention, light is coupled from a plurality of semiconductor emitters to a cladding-pumped fiber via tapered fiber bundles fusion spliced to the cladding-pumped fiber. Individual semiconductor broad stripe emitters can be coupled to individual multimode fibers. The individual fibers can be bundled together in a close-packed formation, heated to melting temperature, drawn into a taper and then fusion spliced to the cladding-pumped fiber. Advantageously, the taper is then overcoated with cladding material such as low index polymer. In addition, a fiber containing a single-mode core can be included in the fiber bundle. This single-mode core can be used to couple light into or out of the single-mode core of the cladding-pumped fiber.

公开(公告)号：ES2179001T3

公开(公告)日：2003-01-16

申请号：ES00301011

申请日：2000-02-09

Applicant: LUCENT TECHNOLOGIES INC

Inventor： HANSEN PER BANG ,  NIELSEN TORBEN N ,  STENTZ ANDREW JOHN

IPC: H04B10/02 ,  H04B10/12 ,  H04B10/135 ,  H04B10/14 ,  H04B10/17 ,  H04B10/18 ,  H04B10/2581 ,  H04J14/00 ,  H04J14/02

公开(公告)号：DE69800007D1

公开(公告)日：1999-08-05

申请号：DE69800007

申请日：1998-06-02

Applicant: LUCENT TECHNOLOGIES INC

Inventor： REED WILLIAM ALFRED ,  STRASSER THOMAS A ,  STENTZ ANDREW JOHN

IPC: G02F1/35 ,  H01S3/06 ,  H01S3/067 ,  H01S3/30

公开(公告)号：DE69700194D1

公开(公告)日：1999-06-02

申请号：DE69700194

申请日：1997-02-04

Applicant: LUCENT TECHNOLOGIES INC

Inventor： GRUBB STEPHEN GREGORY ,  WALKER KENNETH LEE ,  STENTZ ANDREW JOHN

IPC: G02B6/00 ,  G02F1/35 ,  H01S3/30

Abstract: The apparatus includes an optical fibre path of silica-based amplifier fibre that connects an input port and an output port, and a pump radiation input via WDM (13). The pump radiation is introduced at a wavelength lambda p less than a signal wavelength lambda s into the amplifier fibre such that it propagates in the fibre in an upstream direction towards the input port. Provided with the amplifier fibre is at least two lengths of fibre (L1,L2), with the sum of both lengths being at least 200m. An optical isolator is disposed between the two lengths such that passage of radiation of wavelength lambda s from the second to the first length is blocked. The pump path is closed upon itself and includes a portion of the amplifier fibre, the path selected such that the initial pump radiation can circulate in it. A second pump radiation of wavelength lambda p?'lambda p may be introduced into the pump path and a Bragg grating blocks its passage. Selected and placed Bragg gratings provide one or more optical cavities in the fibre ring, such that the input pump radiation is converted to the desired amplifier pump radiation. The wavelength lambda s may be 1310 nm, lambda p 1240 nm, and lambda p?' 1060 nm.