CA2240519A1 - Optical waveguide with photosensitive refractive index cladding - Google Patents

Optical waveguide with photosensitive refractive index cladding

Info

Publication number
CA2240519A1
CA2240519A1 CA002240519A CA2240519A CA2240519A1 CA 2240519 A1 CA2240519 A1 CA 2240519A1 CA 002240519 A CA002240519 A CA 002240519A CA 2240519 A CA2240519 A CA 2240519A CA 2240519 A1 CA2240519 A1 CA 2240519A1
Authority
CA
Canada
Prior art keywords
refractive index
cladding
optical waveguide
photosensitive
index cladding
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CA002240519A
Other languages
French (fr)
Other versions
CA2240519C (en
Inventor
Raman Kashyap
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IPG Photonics Corp
Original Assignee
British Telecommunications Public Limited Company
Raman Kashyap
Ipg Photonics Corporation
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 British Telecommunications Public Limited Company, Raman Kashyap, Ipg Photonics Corporation filed Critical British Telecommunications Public Limited Company
Publication of CA2240519A1 publication Critical patent/CA2240519A1/en
Application granted granted Critical
Publication of CA2240519C publication Critical patent/CA2240519C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • G02B6/02—Optical fibres with cladding with or without a coating
    • G02B6/02057—Optical fibres with cladding with or without a coating comprising gratings
    • G02B6/02076—Refractive index modulation gratings, e.g. Bragg gratings
    • G02B6/0208—Refractive index modulation gratings, e.g. Bragg gratings characterised by their structure, wavelength response
    • G02B6/021—Refractive index modulation gratings, e.g. Bragg gratings characterised by their structure, wavelength response characterised by the core or cladding or coating, e.g. materials, radial refractive index profiles, cladding shape
    • 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
    • G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
    • G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
    • G02B6/122—Basic optical elements, e.g. light-guiding paths
    • G02B6/124—Geodesic lenses or integrated gratings
    • 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
    • G02B6/02057—Optical fibres with cladding with or without a coating comprising gratings
    • G02B6/02076—Refractive index modulation gratings, e.g. Bragg gratings
    • G02B6/0208—Refractive index modulation gratings, e.g. Bragg gratings characterised by their structure, wavelength response
    • G02B6/02085—Refractive index modulation gratings, e.g. Bragg gratings characterised by their structure, wavelength response characterised by the grating profile, e.g. chirped, apodised, tilted, helical
    • 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
    • G02B6/02057—Optical fibres with cladding with or without a coating comprising gratings
    • G02B6/02076—Refractive index modulation gratings, e.g. Bragg gratings
    • G02B6/02114—Refractive index modulation gratings, e.g. Bragg gratings characterised by enhanced photosensitivity characteristics of the fibre, e.g. hydrogen loading, heat treatment
    • 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
    • G02B6/02057—Optical fibres with cladding with or without a coating comprising gratings
    • G02B6/02076—Refractive index modulation gratings, e.g. Bragg gratings
    • G02B6/02123—Refractive index modulation gratings, e.g. Bragg gratings characterised by the method of manufacture of the grating
    • G02B6/02133—Refractive index modulation gratings, e.g. Bragg gratings characterised by the method of manufacture of the grating using beam interference

Abstract

An optical fibre (1) comprises a core (2) and a cladding (3) that includes an inner cladding region (3a) with a refractive index that is photosensitive to UV light, surrounded by a non-photosensitive outer cladding region (3b). Refractive index gratings can be written into the cladding region (3a). Also, the refractive index of the inner region (3a) can be altered by exposure to UV light to achieve mode matching at a splice between fibres with different core diameters. An optical fibre laser is disclosed with integral refractive index gratings (33, 34, 36) in the cladding of a fibre with an optically active core.
CA002240519A 1996-01-18 1997-01-17 Optical waveguide with photosensitive refractive index cladding Expired - Fee Related CA2240519C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP96300394 1996-01-18
EP96300394.2 1996-01-18
PCT/GB1997/000128 WO1997026571A2 (en) 1996-01-18 1997-01-17 Optical waveguide with photosensitive refractive index cladding

Publications (2)

Publication Number Publication Date
CA2240519A1 true CA2240519A1 (en) 1997-07-24
CA2240519C CA2240519C (en) 2006-01-10

Family

ID=8224809

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002240519A Expired - Fee Related CA2240519C (en) 1996-01-18 1997-01-17 Optical waveguide with photosensitive refractive index cladding

Country Status (6)

Country Link
US (1) US6104852A (en)
EP (1) EP0875014B1 (en)
JP (1) JP3929495B2 (en)
CA (1) CA2240519C (en)
DE (1) DE69738178T2 (en)
WO (1) WO1997026571A2 (en)

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Also Published As

Publication number Publication date
WO1997026571A3 (en) 1998-08-27
WO1997026571A2 (en) 1997-07-24
DE69738178D1 (en) 2007-11-15
EP0875014A2 (en) 1998-11-04
JP2000503414A (en) 2000-03-21
DE69738178T2 (en) 2008-07-03
CA2240519C (en) 2006-01-10
US6104852A (en) 2000-08-15
EP0875014B1 (en) 2007-10-03
JP3929495B2 (en) 2007-06-13

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