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IT1275553B - Optical telecommunications system for wavelength division multiplexing transmissions - selects position and attenuation of differential attenuator, filter and wavelength band in functional relationship w.r.t. each other to limit output power variations from preamplifier - Google Patents

Optical telecommunications system for wavelength division multiplexing transmissions - selects position and attenuation of differential attenuator, filter and wavelength band in functional relationship w.r.t. each other to limit output power variations from preamplifier

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Publication number
IT1275553B
IT1275553B ITMI951535A IT1275553B IT 1275553 B IT1275553 B IT 1275553B IT MI951535 A ITMI951535 A IT MI951535A IT 1275553 B IT1275553 B IT 1275553B
Authority
IT
Italy
Prior art keywords
preamplifier
filter
attenuation
output power
functional relationship
Prior art date
Application number
Other languages
Italian (it)
Inventor
Fausto Meli
Original Assignee
Pirelli Cavi Spa
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pirelli Cavi Spa filed Critical Pirelli Cavi Spa
Publication of ITMI951535A0 publication Critical patent/ITMI951535A0/en
Priority to IT95MI001535 priority Critical patent/IT1275553B/en
Priority to PE1995274027A priority patent/PE41196A1/en
Priority to MYPI95002080A priority patent/MY134808A/en
Priority to EP95111505A priority patent/EP0695050A1/en
Priority to RU95113208/09A priority patent/RU2140131C1/en
Priority to CN95108634A priority patent/CN1083651C/en
Priority to FI953545A priority patent/FI953545A7/en
Priority to HU9502216A priority patent/HU216564B/en
Priority to NO952928A priority patent/NO952928L/en
Priority to SK939-95A priority patent/SK93995A3/en
Priority to BR9502404A priority patent/BR9502404A/en
Priority to PL95309765A priority patent/PL177762B1/en
Priority to PL95333800A priority patent/PL178951B1/en
Priority to AU27185/95A priority patent/AU699315B2/en
Priority to KR1019950022090A priority patent/KR960006370A/en
Priority to JP7189471A priority patent/JPH08195734A/en
Priority to CZ951923A priority patent/CZ192395A3/en
Priority to CA002154632A priority patent/CA2154632A1/en
Priority to NZ272643A priority patent/NZ272643A/en
Priority to US08/618,502 priority patent/US5701194A/en
Publication of ITMI951535A1 publication Critical patent/ITMI951535A1/en
Application granted granted Critical
Publication of IT1275553B publication Critical patent/IT1275553B/en

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  • Optical Communication System (AREA)
  • Lasers (AREA)

Abstract

The system generates optical signals of different wavelengths (37 to 40), and includes an optical fibre-line with amplifier (45), a preamplifier (47) and a receiver (54 to 57). The preamplifier includes an optical waveguide (5, 7 and 9) doped with a rare earth material. A differential attenuator (8) is located along the waveguide and attenuates in the signal band greater than at the pumping wavelength. A filter (6) is located on the waveguide at a second position and attenuates by a value higher than a preset minimum, the spontaneous emission in a wavelength band contiguous with the signal band. The position and attenuation of the differential attenuator, filter and wavelength band are selected in a functional relationship w.r.t. each other to limit the output power variations from the preamplifier.
IT95MI001535 1994-07-14 1995-07-14 Optical telecommunications system for wavelength division multiplexing transmissions - selects position and attenuation of differential attenuator, filter and wavelength band in functional relationship w.r.t. each other to limit output power variations from preamplifier IT1275553B (en)

Priority Applications (20)

Application Number Priority Date Filing Date Title
IT95MI001535 IT1275553B (en) 1995-07-14 1995-07-14 Optical telecommunications system for wavelength division multiplexing transmissions - selects position and attenuation of differential attenuator, filter and wavelength band in functional relationship w.r.t. each other to limit output power variations from preamplifier
PE1995274027A PE41196A1 (en) 1994-07-25 1995-07-17 AMPLIFIED TELECOMMUNICATION SYSTEM FOR MULTIPLEX TRANSMISSIONS BY WAVE LENGTH DIVISION, ABLE TO LIMIT THE VARIATIONS IN THE OUTPUT POWER
MYPI95002080A MY134808A (en) 1994-07-25 1995-07-20 Amplified telecommunication system for wavelength-division multiplexing transmissions capable of limiting variations in the output power
EP95111505A EP0695050A1 (en) 1994-07-25 1995-07-21 Amplified telecommunication system for wavelength-division multiplexing transmissions capable of limiting variations in the output power
RU95113208/09A RU2140131C1 (en) 1994-07-25 1995-07-24 Optical communication system, optical amplifier and process of transmission of optical signals over optical communication line
CN95108634A CN1083651C (en) 1994-07-25 1995-07-24 Amplified telecommunication system for wavelengthdivision multiplexing transmissions capable of limiting variations in the output power
FI953545A FI953545A7 (en) 1994-07-25 1995-07-24 Amplifying and output power variation limiting telecommunications system for wavelength-multiplexed transmissions
HU9502216A HU216564B (en) 1994-07-25 1995-07-24 Optical telecommunication system, optical amplifier and method for transmitting optical signals on optical telecommunication lines
NO952928A NO952928L (en) 1994-07-25 1995-07-24 Reinforced telecommunication system for wavelength multiplex transmission and capable of limiting output power variations
CZ951923A CZ192395A3 (en) 1994-07-25 1995-07-25 Optical telecommunication system and optical repeater
SK939-95A SK93995A3 (en) 1994-07-25 1995-07-25 Optical telecommunication system and optical amplifier
PL95309765A PL177762B1 (en) 1994-07-25 1995-07-25 Telecommunication system with transmitted signal amplification for multiplexed signal with wavelength sharing and limitation of output power fluctuations
PL95333800A PL178951B1 (en) 1994-07-25 1995-07-25 Optical amplifier PL PL PL PL
AU27185/95A AU699315B2 (en) 1994-07-14 1995-07-25 Amplified telecommunication system for wavelength-division multiplexing transmissions capable of limiting variations in the output power
KR1019950022090A KR960006370A (en) 1994-07-25 1995-07-25 Amplified telecommunication system for wavelength division multiplexed transmission to suppress fluctuations in output power
JP7189471A JPH08195734A (en) 1994-07-25 1995-07-25 Amplification communication system for wavelength division multiplex transmission capable of limiting fluctuations in output power
BR9502404A BR9502404A (en) 1994-07-25 1995-07-25 Optical telecommunication system amplified by multiplexing by division of wavelength with limitation of variations in output power
CA002154632A CA2154632A1 (en) 1994-07-25 1995-07-25 Amplified telecommunication system for wavelength-division multiplexing transmissions capable of limiting variations in the output power
NZ272643A NZ272643A (en) 1994-07-25 1995-07-25 Optical amplifier for wavelength division multiplexed optical signals and optical fibre telecommunication system
US08/618,502 US5701194A (en) 1994-07-14 1996-03-19 Amplified telecommunication system for wavelength-division multiplexing transmissions capable of limiting variations in the output power

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT95MI001535 IT1275553B (en) 1995-07-14 1995-07-14 Optical telecommunications system for wavelength division multiplexing transmissions - selects position and attenuation of differential attenuator, filter and wavelength band in functional relationship w.r.t. each other to limit output power variations from preamplifier

Publications (3)

Publication Number Publication Date
ITMI951535A0 ITMI951535A0 (en) 1995-07-14
ITMI951535A1 ITMI951535A1 (en) 1997-01-14
IT1275553B true IT1275553B (en) 1997-08-07

Family

ID=11371988

Family Applications (1)

Application Number Title Priority Date Filing Date
IT95MI001535 IT1275553B (en) 1994-07-14 1995-07-14 Optical telecommunications system for wavelength division multiplexing transmissions - selects position and attenuation of differential attenuator, filter and wavelength band in functional relationship w.r.t. each other to limit output power variations from preamplifier

Country Status (1)

Country Link
IT (1) IT1275553B (en)

Also Published As

Publication number Publication date
ITMI951535A0 (en) 1995-07-14
ITMI951535A1 (en) 1997-01-14

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0001 Granted