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GB2335074A - Optical amplifier and light source - Google Patents

Optical amplifier and light source

Info

Publication number
GB2335074A
GB2335074A GB9912603A GB9912603A GB2335074A GB 2335074 A GB2335074 A GB 2335074A GB 9912603 A GB9912603 A GB 9912603A GB 9912603 A GB9912603 A GB 9912603A GB 2335074 A GB2335074 A GB 2335074A
Authority
GB
United Kingdom
Prior art keywords
disclose
light
fibre
cladding
well
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
GB9912603A
Other versions
GB2335074B (en
GB9912603D0 (en
Inventor
Johan Samsung Nilson
David Colin Hanna
John Douglas Minelly
Ruediger Eberhard Paschotta
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.)
University of Southampton
Original Assignee
University of Southampton
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
Priority claimed from GBGB9625231.7A external-priority patent/GB9625231D0/en
Application filed by University of Southampton filed Critical University of Southampton
Priority to GB9912603A priority Critical patent/GB2335074B/en
Priority to GB0122822A priority patent/GB2366447B/en
Publication of GB9912603D0 publication Critical patent/GB9912603D0/en
Publication of GB2335074A publication Critical patent/GB2335074A/en
Application granted granted Critical
Publication of GB2335074B publication Critical patent/GB2335074B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • H01S2301/00—Functional characteristics
    • H01S2301/02—ASE (amplified spontaneous emission), noise; Reduction thereof
    • 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
    • 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
    • H01S3/08—Construction or shape of optical resonators or components thereof
    • H01S3/08018—Mode suppression
    • H01S3/0804—Transverse or lateral modes
    • H01S3/08045—Single-mode emission
    • 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
    • H01S3/09—Processes or apparatus for excitation, e.g. pumping
    • H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
    • H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
    • H01S3/094003—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light the pumped medium being a fibre
    • H01S3/094007—Cladding pumping, i.e. pump light propagating in a clad surrounding the active core
    • 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
    • H01S3/09—Processes or apparatus for excitation, e.g. pumping
    • H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
    • H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
    • H01S3/094042—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a fibre laser

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Optics & Photonics (AREA)
  • Lasers (AREA)

Abstract

We disclose single- or few-moded waveguiding cladding-pumped lasers, superfluorescent sources, and amplifiers, as well as lasers, including those for high-energy pulses, in which the interaction between the waveguided light and a gain medium is substantially reduced. This leads to decreased losses of guided desired light as well as to decreased losses through emission of undesired light, compared to devices of the prior art. Furthermore, also cross-talk and inter-symbol interference in semiconductor amplifiers can be reduced. We also disclose devices with a predetermined saturation power. As a preferred embodiment of the invention, we disclose a single (transverse) mode optical fibre laser or amplifier in which the active medium (providing gain or saturable absorption) is of the fibre's cross section where the intensity of the signal light is substantially reduced compared to its peak value. The fibre may be cladding-pumped.
GB9912603A 1996-12-04 1997-12-04 Optical Amplifier Expired - Lifetime GB2335074B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB9912603A GB2335074B (en) 1996-12-04 1997-12-04 Optical Amplifier
GB0122822A GB2366447B (en) 1996-12-04 1997-12-04 Apparatus for Amplifying a Signal Beam having a Normalised Intensity Distribution

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GBGB9625231.7A GB9625231D0 (en) 1996-12-04 1996-12-04 Optical amplifiers & lasers
PCT/GB1997/003353 WO1998025326A1 (en) 1996-12-04 1997-12-04 Optical amplifier and light source
GB9912603A GB2335074B (en) 1996-12-04 1997-12-04 Optical Amplifier

Publications (3)

Publication Number Publication Date
GB9912603D0 GB9912603D0 (en) 1999-07-28
GB2335074A true GB2335074A (en) 1999-09-08
GB2335074B GB2335074B (en) 2002-02-13

Family

ID=26310549

Family Applications (2)

Application Number Title Priority Date Filing Date
GB0122822A Expired - Lifetime GB2366447B (en) 1996-12-04 1997-12-04 Apparatus for Amplifying a Signal Beam having a Normalised Intensity Distribution
GB9912603A Expired - Lifetime GB2335074B (en) 1996-12-04 1997-12-04 Optical Amplifier

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB0122822A Expired - Lifetime GB2366447B (en) 1996-12-04 1997-12-04 Apparatus for Amplifying a Signal Beam having a Normalised Intensity Distribution

Country Status (1)

Country Link
GB (2) GB2366447B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7161966B2 (en) 2003-01-24 2007-01-09 Trumpf, Inc. Side-pumped fiber laser
US7542488B2 (en) 2003-01-24 2009-06-02 Trumpf, Inc. Fiber laser

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7983312B2 (en) 2007-08-09 2011-07-19 Raytheon Company Method and apparatus for generation and amplification of light in a semi-guiding high aspect ratio core fiber
ATE552632T1 (en) * 2008-11-17 2012-04-15 Raytheon Co METHOD AND APPARATUS FOR GENERATING AND AMPLIFYING LIGHT IN A SEMI-CONDUCTING FIBER HAVING A HIGH ASPECT RATIO CORE
FR2952243B1 (en) 2009-11-03 2012-05-11 Univ Bordeaux 1 OPTICAL SOURCE USING A DOPED FIBER, FIBER FOR SUCH AN OPTICAL SOURCE AND METHOD FOR MANUFACTURING SUCH A FIBER

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0442553A1 (en) * 1990-02-12 1991-08-21 PIRELLI CAVI S.p.A. Optical amplifier having a single-mode curved active fibre
EP0519648A2 (en) * 1991-06-19 1992-12-23 AT&T Corp. Gain switchable optical fiber amplifier
EP0527265A1 (en) * 1991-08-12 1993-02-17 Corning Incorporated Fiber amplifier having modified gain spectrum
US5469292A (en) * 1991-07-19 1995-11-21 Lycom A/S Method of amplifying an optical signal, an optical amplifier for performing the method, and use of such an optical amplifier as a source of light

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3456211A (en) * 1966-06-16 1969-07-15 American Optical Corp Fiber laser structures and the like
US5155621A (en) * 1990-07-31 1992-10-13 Fujitsu Limited Optical fiber amplifier
JP3556026B2 (en) * 1995-10-30 2004-08-18 富士通株式会社 Multi-wavelength optical amplifier that amplifies multiple wavelength signals at once

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0442553A1 (en) * 1990-02-12 1991-08-21 PIRELLI CAVI S.p.A. Optical amplifier having a single-mode curved active fibre
EP0519648A2 (en) * 1991-06-19 1992-12-23 AT&T Corp. Gain switchable optical fiber amplifier
US5469292A (en) * 1991-07-19 1995-11-21 Lycom A/S Method of amplifying an optical signal, an optical amplifier for performing the method, and use of such an optical amplifier as a source of light
EP0527265A1 (en) * 1991-08-12 1993-02-17 Corning Incorporated Fiber amplifier having modified gain spectrum

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
Optics Communication Vol 122 No 4/06 January 1996 pages 163-168 *
Optics Communications Vol 109 No 5-6 July 1994 pages 499-506 *
Optics Letters Vol 21 No 15 August 1996 pages 1144-1146 *
Optics Letters Vol 22 No 14 July 1997 pages 1092-1094 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7161966B2 (en) 2003-01-24 2007-01-09 Trumpf, Inc. Side-pumped fiber laser
US7542488B2 (en) 2003-01-24 2009-06-02 Trumpf, Inc. Fiber laser

Also Published As

Publication number Publication date
GB2366447A (en) 2002-03-06
GB2335074B (en) 2002-02-13
GB9912603D0 (en) 1999-07-28
GB2366447B (en) 2002-04-17
GB0122822D0 (en) 2001-11-14

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PE20 Patent expired after termination of 20 years

Expiry date: 20171203