公开(公告)号：CA2332068C

公开(公告)日：2004-04-27

申请号：CA2332068

申请日：2001-01-23

Applicant: LUCENT TECHNOLOGIES INC

Inventor： STRASSER THOMAS ANDREW ,  HALE ARTURO ,  WESTBROOK PAUL STEPHEN

IPC: G02B6/02 ,  C03C25/24 ,  G02B5/18 ,  G02B6/10 ,  G02B6/34 ,  G02B6/44

Abstract: In accordance with the invention, an optical fiber Bragg grating comprises a length of gloss optical fiber having a core, a Bragg grating formed along the core, a glass cladding and a polymer coating on the cladding havin g an index of refraction matched to that the cladding. Such index matching can reduce the cladding mode loss by a factor of four over current levels. A preferred coating material comprises fluorinated urethane acrylate.

公开(公告)号：DE60001812D1

公开(公告)日：2003-04-30

申请号：DE60001812

申请日：2000-12-08

Applicant: LUCENT TECHNOLOGIES INC

Inventor： STRASSER THOMAS ANDREW ,  WESTBROOK PAUL STEPHEN

IPC: G02B5/20 ,  G02B5/18 ,  G02B6/02 ,  G02B6/16

Abstract: A refractive index grating according to this invention is a tilted grating in a single mode optical waveguide, with a photosensitivity profile that includes at least one "tuning region" in the waveguide core (41). Appropriate choice of the photosensitivity profile, e.g. an annular tuning region (51) with low concentration of photosensitizing species, can result in a "supernull" in the LP01.f to LP01.b coupling. That is to say, the angular range of the tilt angle &thetas; over which the core mode coupling is essentially zero (i.e., 20dB) and bandwidth (>20nm). A method of trimming a grating is also disclosed.

公开(公告)号：DE69903896D1

公开(公告)日：2002-12-19

申请号：DE69903896

申请日：1999-08-23

Applicant: LUCENT TECHNOLOGIES INC

Inventor： STRASSER THOMAS ANDREW ,  WAGENER JEFFERSON LYNN

IPC: G02B6/02 ,  G02B5/18 ,  G02B6/024 ,  G02B6/34 ,  G02B6/16

Abstract: A dispersion compensating chirped optical fiber Bragg grating (11) according to our invention is formed in polarization maintaining (PM) fiber (32) having birefringence of at least 10 , preferably 10 or more. Use of the PM fiber makes possible substantial cancellation of the polarization mode dispersion that typically is unavoidably present in chirped Bragg gratings for dispersion compensation.

公开(公告)号：CA2331914A1

公开(公告)日：2001-09-03

申请号：CA2331914

申请日：2001-01-23

Applicant: LUCENT TECHNOLOGIES INC

Inventor： STRASSER THOMAS ANDREW ,  WESTBROOK PAUL STEPHEN ,  BURDGE GEOFFREY L ,  WINDELER ROBERT SCOTT ,  EGGLETON BENJAMIN JOHN

IPC: G02B5/18 ,  C03B37/012 ,  G02B6/00 ,  G02B6/02 ,  G02B6/34 ,  H04B10/18 ,  G02B5/26

Abstract: The present invention is predicated on applicants' discovery that an appropriately spaced and dimensioned internal gap cladding can substantially reduce short wavelength cladding mode loss in a fiber Bragg grating. A fiber Bragg grating is provided with a ring of closely spaced, longitudinally extending gap regions in the glass peripherally surrounding the core. The gaps are spaced apart by thin glass webs having a thickness less than a wavelength of the light being transmitted and are disposed peripherally abou t the core at a distance of 2-10 wavelengths from the core center. The thin webs limit the passage of the light between the gaps. The combination of webs and gaps acts as an internal thin cladding which supports fewer cladding modes than conventional glass cladding and, significantly, provides increased wavelength spacing between the Bragg resonance and the first cladding made resonance.

公开(公告)号：CA2295264A1

公开(公告)日：2000-07-26

申请号：CA2295264

申请日：2000-01-10

Applicant: LUCENT TECHNOLOGIES INC

Inventor： JIN SUNGHO ,  MAVOORI HAREESH ,  STRASSER THOMAS ANDREW ,  ROGERS JOHN A ,  ADAMS LAURA ELLEN ,  EGGLETON BENJAMIN JOHN ,  ESPINDOLA ROLANDO PATRICIO

IPC: G02B5/18 ,  G02B6/02 ,  G02B6/34 ,  G02B26/00 ,  G02F1/01 ,  H01S3/10 ,  H04B10/18 ,  G02B6/124 ,  H04J14/02

Abstract: A method for making a chirped grating device capable of a broad bandwith for optical communication systems is disclosed. An intrinsically-chirped optical grating is externally strained to alter the range of chirping. The external strain may be induced by a gradient-generating body bonded onto the length of the fiber grating that may be latchably strained so that the grating characteristics may be changed or tuned while avoiding use of a continuous power supply. Various optical networking applications using such dispersion compensating devices are also disclosed.

公开(公告)号：CA2278902A1

公开(公告)日：2000-03-02

申请号：CA2278902

申请日：1999-07-27

Applicant: LUCENT TECHNOLOGIES INC

Inventor： STRASSER THOMAS ANDREW ,  WAGENER JEFFERSON LYNN

IPC: G02B6/02 ,  G02B5/18 ,  G02B6/024 ,  G02B6/34 ,  G02B6/17

Abstract: A dispersion compensating chirped optical fiber Bragg grating according to our invention is formed in polarization maintaining (PM) fiber having birefringence of at least 10-6, preferably 10-5 or more. Use of the PM fiber makes possible substantial cancellation of the polarization mode dispersion that typically is unavoidably present in chirped Bragg gratings for dispersion compensation.

公开(公告)号：DE60037052D1

公开(公告)日：2007-12-27

申请号：DE60037052

申请日：2000-01-19

Applicant: LUCENT TECHNOLOGIES INC

Inventor： ADAMS LAURA ELLEN ,  EGGLETON BENJAMIN JOHN ,  ESPINDOLA ROLANDO PATRICIO ,  JIN SUNGHO ,  MAVOORI HAREESH ,  ROGERS JOHN A ,  STRASSER THOMAS ANDREW

IPC: G02B5/18 ,  G02B6/10 ,  G02B1/10 ,  G02B6/02 ,  G02B6/34 ,  G02B26/00 ,  G02F1/01 ,  H04B10/02 ,  H04B10/18 ,  H04B10/43

公开(公告)号：CA2295264C

公开(公告)日：2005-05-10

申请号：CA2295264

申请日：2000-01-10

Applicant: LUCENT TECHNOLOGIES INC

Inventor： ROGERS JOHN A ,  STRASSER THOMAS ANDREW ,  ESPINDOLA ROLANDO PATRICIO ,  JIN SUNGHO ,  MAVOORI HAREESH ,  EGGLETON BENJAMIN JOHN ,  ADAMS LAURA ELLEN

IPC: G02B5/18 ,  G02B6/02 ,  G02B6/34 ,  G02B26/00 ,  G02F1/01 ,  H01S3/10 ,  H04B10/18 ,  G02B6/124 ,  H04J14/02

Abstract: A method for making a chirped grating device capable of a broad bandwid th for optical communication systems is disclosed. An intrinsically-chirped optical grating is externally strained to alter the range of chirping. The external strain may be induced by a gradient-generating body bonded onto the length of the fiber grating that may be latchably strained so that the grating characteristics may be changed or tuned while avoiding use of a continuous power supply. Various optical networking applications using such dispersion compensating devices are also disclosed.

公开(公告)号：CA2335166C

公开(公告)日：2005-01-11

申请号：CA2335166

申请日：2001-02-09

Applicant: LUCENT TECHNOLOGIES INC

Inventor： ACKERMAN DAVID ALAN ,  ROTTWITT KARSTEN ,  STENTZ ANDREW JOHN ,  STRASSER THOMAS ANDREW ,  ZHANG LIMING ,  DU MEI ,  BACHER KENNETH L ,  DAUTREMONT-SMITH WILLIAM CROSS

IPC: G02F1/35 ,  H01S3/06 ,  H01S3/30 ,  H04B10/00 ,  H04B10/17 ,  G02F1/39

Abstract: A fiber Raman amplifier is configured to use a co-propagating Raman pum p source, which may be beneficial in a variety of system configurations (for example, in bidirectional communication systems). By carefully configuring the pump sour ce characteristics, sufficient optical gain can be achieved in the co-propagati ng arrangement, the characteristics including: (1) using an optical pump power of at least 50mW, (2) having a relatively large spectral bandwidth within the pump (to suppress SBS); and (3) a frequency difference between all longitudinal pump modes of each pump laser being separated by at least the walk-off frequency between the pu mp laser frequency and the signal frequency, and all intense longitudinal modes betwe en different pump lasers being separated by at least the electrical bandwidth o f the communication system.

公开(公告)号：DE60001239T2

公开(公告)日：2003-10-30

申请号：DE60001239

申请日：2000-02-09

Applicant: LUCENT TECHNOLOGIES INC

Inventor： ESPINDOLA ROLANDO PATRICIO ,  STRASSER THOMAS ANDREW ,  WESTBROOK PAUL STEPHEN ,  WYSOCKI PAUL FRANCIS

IPC: H01S3/06 ,  H01S3/067 ,  H01S3/10

Abstract: L-band EDFA (Er-doped fiber amplifier) characteristics are improved by provision of filter means in the C-band, the filter means having a figure of merit greater than 400dB.nm. The filter means can be discrete and/or distributed filter means. In preferred embodiments, two or more full C-band blazed fiber Bragg gratings are used.