Assignee
ALCATEL SUBMARCOM
FR32 patents
Top patents by PatentIndex Score
US5892876AApr 6, 1999
Optical fiber including a fluorescent dopant
ALCATEL SUBMARCOM22 citations92
US5857040AJan 5, 1999
Adjustable optical amplitude and phase modulator, and a soliton regenerator including such a modulator
ALCATEL SUBMARCOM33 citations92
US5801862ASep 1, 1998
Synchronous modulation method and apparatus for in-line regeneration of a WDM soliton signal, and an optical telecommunications systems using the method
ALCATEL SUBMARCOM29 citations92
US5732169AMar 24, 1998
Filter for guided light, and an optical link including the filter
ALCATEL SUBMARCOM27 citations92
US5675690AOct 7, 1997
Dispersion-flattened single-mode optical waveguide with large effective mode surface area
ALCATEL SUBMARCOM45 citations92
US5854704ADec 29, 1998
Receiver for optical digital transmission system
ALCATEL SUBMARCOM78 citations91
US5801878ASep 1, 1998
Circuit having two optical amplifiers, in particular for a repeater in an undersea telecommunications system
ALCATEL SUBMARCOM26 citations89
US5838871ANov 17, 1998
Device for organizing optical fiber cable connections and optical cable joint box
ALCATEL SUBMARCOM21 citations85
US6342962B2Jan 29, 2002
Optical system for transmitting data in soliton format
ALCATEL SUBMARCOM17 citations76
US11499849B2Nov 15, 2022
Method and apparatus for suppression of noise due to transmitted signal instability in a coherent fiber optical sensor system
ALCATEL SUBMARCOM2 citations73
US6038211AMar 14, 2000
Terminal for a bidirectional synchronous digital hierarchy link with automatic protection switching conveying multiplexed data
ALCATEL SUBMARCOM14 citations71
US6025948AFeb 15, 2000
Optical signal transmission installation including a repeater monitoring system
ALCATEL SUBMARCOM9 citations71
US11095370B2Aug 17, 2021
Symmetrical supervisory optical circuit for a bidirectional optical repeater
ALCATEL SUBMARCOM2 citations70
US5724178AMar 3, 1998
Amplitude modulation circuit having an electro-absorption modulator
ALCATEL SUBMARCOM16 citations70
US5759454AJun 2, 1998
Method of injecting a filler in controlled manner into a protective tube for protecting optical fibers, and an installation for implementing the method
ALCATEL SUBMARCOM9 citations69
US5905825AMay 18, 1999
Optical transmission method and system using solitons
ALCATEL SUBMARCOM10 citations68
US5561553AOct 1, 1996
System for transmission over a repeaterless optical fiber line, with remote and local amplification
ALCATEL SUBMARCOM16 citations68
US5760364AJun 2, 1998
Unit for protecting a metal tube containing at least one optical fiber against internal overheating, and a method of implementing it
ALCATEL SUBMARCOM9 citations65
US12510380B2Dec 30, 2025
Method and apparatus for suppression of noise due to local oscillator instability in a coherent fiber optical sensor
ALCATEL SUBMARCOM0 citations62
US11828631B2Nov 28, 2023
Method and apparatus for suppression of noise due to local oscillator instability in a coherent fiber optical sensor
ALCATEL SUBMARCOM1 citations62
US10833766B2Nov 10, 2020
Monitoring equipment for an optical transport system
ALCATEL SUBMARCOM6 citations62
US6008922ADec 28, 1999
Optical communication system using optical amplifiers with gain dependent on input signal polarization
ALCATEL SUBMARCOM4 citations59
US5880428AMar 9, 1999
Laser welding line for repairing a closure fault of a metal tube containing at least one transmission optical fiber
ALCATEL SUBMARCOM2 citations59
US5700990ADec 23, 1997
Method for repairing a closure fault of a metal tube containing at least one optical fiber by laser welding
ALCATEL SUBMARCOM2 citations59
US11757528B2Sep 12, 2023
Supervision of an optical path including an amplifier
ALCATEL SUBMARCOM0 citations58
US5857055AJan 5, 1999
Method of imparting surplus length to optical fibers in a protective metal tube and a line for implementing the method
ALCATEL SUBMARCOM2 citations53
US11821784B2Nov 21, 2023
Fibre-optic hydrophone with internal filter
ALCATEL SUBMARCOM0 citations52
US11101885B2Aug 24, 2021
Supervisory signal paths for an optical transport system
ALCATEL SUBMARCOM1 citations52
US12002349B2Jun 4, 2024
Monitoring equipment for cables
ALCATEL SUBMARCOM0 citations43
US12592770B2Mar 31, 2026
Distributed fiber optic sensing on optical fibers carrying traffic
ALCATEL SUBMARCOM0 citations41
US11368216B2Jun 21, 2022
Use of band-pass filters in supervisory signal paths of an optical transport system
ALCATEL SUBMARCOM0 citations41
US10778336B2Sep 15, 2020
Communication system employing self-tuning optical transceivers
ALCATEL SUBMARCOM0 citations21