WO2000025091A8 - A method and system for modal noise suppression in fiber optic systems - Google Patents

A method and system for modal noise suppression in fiber optic systems

Info

Publication number
WO2000025091A8
WO2000025091A8 PCT/US1999/023578 US9923578W WO0025091A8 WO 2000025091 A8 WO2000025091 A8 WO 2000025091A8 US 9923578 W US9923578 W US 9923578W WO 0025091 A8 WO0025091 A8 WO 0025091A8
Authority
WO
WIPO (PCT)
Prior art keywords
fiber
coupled
mns
modal noise
isolator
Prior art date
Application number
PCT/US1999/023578
Other languages
French (fr)
Other versions
WO2000025091A2 (en
WO2000025091A3 (en
WO2000025091A9 (en
Inventor
Shin-Lo Chia
Original Assignee
Gc Technologies Ltd
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 Gc Technologies Ltd filed Critical Gc Technologies Ltd
Priority to JP2000578618A priority Critical patent/JP2002528757A/en
Priority to EP99969589A priority patent/EP1119785A2/en
Priority to AU29577/00A priority patent/AU2957700A/en
Publication of WO2000025091A2 publication Critical patent/WO2000025091A2/en
Publication of WO2000025091A3 publication Critical patent/WO2000025091A3/en
Publication of WO2000025091A9 publication Critical patent/WO2000025091A9/en
Publication of WO2000025091A8 publication Critical patent/WO2000025091A8/en

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/264—Optical coupling means with optical elements between opposed fibre ends which perform a function other than beam splitting
    • G02B6/266—Optical coupling means with optical elements between opposed fibre ends which perform a function other than beam splitting the optical element being an attenuator
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/02—Optical fibres with cladding with or without a coating
    • G02B6/036—Optical fibres with cladding with or without a coating core or cladding comprising multiple layers
    • G02B6/03694—Multiple layers differing in properties other than the refractive index, e.g. attenuation, diffusion, stress properties
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/36—Mechanical coupling means
    • G02B6/38—Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807—Dismountable connectors, i.e. comprising plugs
    • G02B6/3833—Details of mounting fibres in ferrules; Assembly methods; Manufacture
    • G02B6/3845—Details of mounting fibres in ferrules; Assembly methods; Manufacture ferrules comprising functional elements, e.g. filters
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
    • H01S3/06—Construction or shape of active medium
    • H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
    • H01S3/067—Fibre lasers
    • H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
    • H01S3/06716—Fibre compositions or doping with active elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
    • H01S3/06—Construction or shape of active medium
    • H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
    • H01S3/067—Fibre lasers
    • H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
    • H01S3/06729—Peculiar transverse fibre profile
    • H01S3/06733—Fibre having more than one cladding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
    • H01S3/06—Construction or shape of active medium
    • H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
    • H01S3/067—Fibre lasers
    • H01S3/06754—Fibre amplifiers

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Couplings Of Light Guides (AREA)
  • Light Guides In General And Applications Therefor (AREA)

Abstract

The present invention provides a method and system for modal noise suppression in a fiber optics systems.A single mode optical fiber (21) comprises a strongly absorbing outer cladding glass and a non-absorbing inner cladding glass (12). The fiber also includes a non-absorbing core glass (13). Through this combination modal noise is suppressed. In an another aspect, an in-line attenuator is provided. The in-line attenutator includes a single mode optical fiber, an attenuating fiber (22) coupled thereto, and a ferrule member for bolding the single mode optical fiber and the attenuating fiber. In a third aspect, an isolator is provided. The isolator comprises an optics assembly and an input transmission fiber coupled to the optics assembly. The isolator further includes a first modal noise suppression (MNS) fiber coupled in the input transmission fiber and a gradient index lens (34) coupled between the optics assembly and the MNS fiber. The isolator further includes a second MNS fiber coupled to the gradient index lens (34) and an output filter (36) coupled to the second MNS fiber. In another aspect, a fiber amplifier is provided. The fiber amplifier comprising first and second wavelength division multiplexers (WDMS) (41) means and first and second fibers which provide pump power into the first and second WDM means.
PCT/US1999/023578 1998-10-09 1999-10-07 A method and system for modal noise suppression in fiber optic systems WO2000025091A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2000578618A JP2002528757A (en) 1998-10-09 1999-10-07 Methods and systems for suppressing modal noise in fiber optic systems.
EP99969589A EP1119785A2 (en) 1998-10-09 1999-10-07 A method and system for modal noise suppression in fiber optic systems
AU29577/00A AU2957700A (en) 1998-10-09 1999-10-07 A method and system for modal noise suppression in fiber optic systems

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US16956298A 1998-10-09 1998-10-09
US09/169,562 1998-10-09

Publications (4)

Publication Number Publication Date
WO2000025091A2 WO2000025091A2 (en) 2000-05-04
WO2000025091A3 WO2000025091A3 (en) 2000-07-06
WO2000025091A9 WO2000025091A9 (en) 2000-09-28
WO2000025091A8 true WO2000025091A8 (en) 2001-07-05

Family

ID=22616219

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1999/023578 WO2000025091A2 (en) 1998-10-09 1999-10-07 A method and system for modal noise suppression in fiber optic systems

Country Status (4)

Country Link
EP (1) EP1119785A2 (en)
JP (1) JP2002528757A (en)
AU (1) AU2957700A (en)
WO (1) WO2000025091A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010078701A (en) 2008-09-24 2010-04-08 Mitsubishi Cable Ind Ltd Splicing structure of optical fibers and single mode fiber
JP2010102276A (en) 2008-09-26 2010-05-06 Mitsubishi Cable Ind Ltd Optical fiber and method for manufacturing the same
CN104694081B (en) * 2015-03-23 2019-09-20 江苏海迅实业集团股份有限公司 The Compostie abrasive particles of silica nanometer containing cobalt doped colloidal sol, polishing fluid and preparation method thereof

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5095519A (en) * 1990-11-30 1992-03-10 At&T Bell Laboratories Apparatus and method for producing an in-line optical fiber attenuator
US5572618A (en) * 1994-07-13 1996-11-05 Lucent Technologies Inc. Optical attenuator
US5651085A (en) * 1994-09-27 1997-07-22 Chia; Shin-Lo All fiber attenuator
US5581649A (en) * 1995-04-28 1996-12-03 The Whitaker Corporation Fixed value fiber optic attenuator with index matching material

Also Published As

Publication number Publication date
WO2000025091A2 (en) 2000-05-04
JP2002528757A (en) 2002-09-03
WO2000025091A3 (en) 2000-07-06
EP1119785A2 (en) 2001-08-01
AU2957700A (en) 2000-05-15
WO2000025091A9 (en) 2000-09-28

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