Processing

Please wait...

Settings

Settings

Goto Application

1. WO2007141464 - OPTICAL PULSE PROPAGATION

Publication Number WO/2007/141464
Publication Date 13.12.2007
International Application No. PCT/GB2006/002083
International Filing Date 07.06.2006
IPC
G01M 11/00 2006.01
GPHYSICS
01MEASURING; TESTING
MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
11Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
H04B 10/2519 2013.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
10Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
25Arrangements specific to fibre transmission
2507for the reduction or elimination of distortion or dispersion
2513due to chromatic dispersion
2519using Bragg gratings
H04B 10/2537 2013.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
10Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
25Arrangements specific to fibre transmission
2507for the reduction or elimination of distortion or dispersion
2537due to scattering processes, e.g. Raman or Brillouin scattering
CPC
G01M 11/3127
GPHYSICS
01MEASURING; TESTING
MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
11Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
30Testing of optical devices, constituted by fibre optics or optical waveguides
31with a light emitter and a light receiver being disposed at the same side of a fibre or waveguide end-face, e.g. reflectometers
3109Reflectometers detecting the back-scattered light in the time-domain, e.g. OTDR
3127using multiple or wavelength variable input source
H04B 10/2519
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
10Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
25Arrangements specific to fibre transmission
2507for the reduction or elimination of distortion or dispersion
2513due to chromatic dispersion
2519using Bragg gratings
H04B 10/2537
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
10Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
25Arrangements specific to fibre transmission
2507for the reduction or elimination of distortion or dispersion
2537due to scattering processes, e.g. Raman or Brillouin scattering
H04J 14/02
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
JMULTIPLEX COMMUNICATION
14Optical multiplex systems
02Wavelength-division multiplex systems
Applicants
  • SCHLUMBERGER HOLDINGS LIMITED [--]/[--] (GB, JP, NL)
  • SCHLUMBERGER CANADA LIMITD [CA]/[CA] (CA)
  • SCHLUMBERGER SURENCO S.A. [PA]/[PA] (BR)
  • SCHLUMBERGER OILFIELD ASSISTANCE LIMITED [--]/[--] (SD, TR)
  • SCHLUMBERGER OVERSEAS S.A. [PA]/[PA] (CN)
  • PRAD RESEARCH AMD DEVELOPMENT N.V. [NL]/[NL] (AllExceptUS)
  • SCHLUMBERGER SERVICES LIMITED [--]/[--] (TT)
  • SERVICES PETROLIERS SCHLUMBERGER [FR]/[FR] (FR)
  • SCHLUMBERGER TECHNOLOGY B.V. [NL]/[NL] (AL, AU, AZ, BG, CO, CZ, DE, DK, GQ, GR, HU, ID, IE, IL, IT, KP, KZ, LT, MX, NO, NZ, OM, PL, RO, RU, SK, SL, TD, TN, TR, TT, UZ, ZA)
  • HARTOG, Arthur [CA]/[GB] (UsOnly)
  • WAIT, Peter [GB]/[GB] (UsOnly)
Inventors
  • HARTOG, Arthur
  • WAIT, Peter
Agents
  • KANAK, Wayne, I.
Priority Data
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) OPTICAL PULSE PROPAGATION
(FR) PROPAGATION D'IMPULSIONS OPTIQUES
Abstract
(EN)
A method for propagating short optical pulses comprises constructing a composite pulse (22) comprising a probe pulse (10) flanked by a pair of guard pulses (16, 18) of different wavelength from the probe pulse. These pulses have respective temporal delays so that the composite pulse has a central portion in which the intensity is substantially constant with time. This protects the probe pulse from self-phase modulation (SPM) during propagation of the composite pulse through an optical fibre; only the external edges of the guard pulses undergo SPM. After propagation, the guard pulses are filtered out, leaving an undistorted probe pulse for detection. In some embodiments, the composite pulse contains a plurality of probe pulses, which may have different wavelengths. Various apparatus can be used for generation of the composite pulse.
(FR)
La présente invention concerne un procédé de propagation d'impulsions optiques courtes qui comprend l'élaboration d'une impulsion composite (22) comprenant une impulsion sonde (10) encadrée par une paire d'impulsions de protection (16, 18) d'une longueur d'onde différente de l'impulsion sonde. Ces impulsions ont des retards temporels respectifs afin que l'impulsion composite comporte une partie centrale dans laquelle l'intensité est pratiquement constante au cours du temps. Ceci protège l'impulsion sonde d'une auto-modulation de phase (SPM) au cours de la propagation de l'impulsion composite à travers une fibre optique; seuls les côtés externes des impulsions de protection subissent une SPM. Après la propagation, les impulsions de protection sont éliminées par filtrage, laissant ainsi une impulsion sonde non distordue pour la détection. Dans certains modes de réalisation, l'impulsion composite contient une pluralité d'impulsions sondes, qui peuvent avoir des longueurs d'onde différentes. Divers appareils peuvent être utilisés pour la génération de l'impulsion sonde.
Also published as
GB0823038.5
Latest bibliographic data on file with the International Bureau