CA2749988A1 - Two-stage brightness converter - Google Patents

Two-stage brightness converter Download PDF

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Publication number
CA2749988A1
CA2749988A1 CA2749988A CA2749988A CA2749988A1 CA 2749988 A1 CA2749988 A1 CA 2749988A1 CA 2749988 A CA2749988 A CA 2749988A CA 2749988 A CA2749988 A CA 2749988A CA 2749988 A1 CA2749988 A1 CA 2749988A1
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CA
Canada
Prior art keywords
optical
brightness
band
flexible
optical fiber
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
CA2749988A
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French (fr)
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CA2749988C (en
Inventor
Stephane Chatigny
Jean-Noel Maran
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Coractive High Tech Inc
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Coractive High Tech Inc
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Publication of CA2749988A1 publication Critical patent/CA2749988A1/en
Application granted granted Critical
Publication of CA2749988C publication Critical patent/CA2749988C/en
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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
    • H01S3/0675—Resonators including a grating structure, e.g. distributed Bragg reflectors [DBR] or distributed feedback [DFB] fibre lasers
    • 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
    • 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
    • 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
    • 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
    • H01S3/0941—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a laser diode
    • H01S3/09415—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a laser diode the pumping beam being parallel to the lasing mode of the pumped medium, e.g. end-pumping
    • 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
    • H01S3/14—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range characterised by the material used as the active medium
    • H01S3/16—Solid materials
    • H01S3/1601—Solid materials characterised by an active (lasing) ion
    • H01S3/1603—Solid materials characterised by an active (lasing) ion rare earth
    • H01S3/1618—Solid materials characterised by an active (lasing) ion rare earth ytterbium

Abstract

There is provided a two-stage brightness converter. A first brightness conversion stage has a laser cavity having a first optical waveguide doped with an active ion defining a first optical band with optical absorption, a second optical band with optical absorption and optical gain, and a third optical band with optical gain. The first laser cavity is pumped with a pump power having a wavelength in the first optical band to generate an intermediate optical signal in the second optical band. A second brightness conversion stage which is in cascade with the first brightness conversion stage comprises a second optical waveguide doped with the same active ion. The second brightness conversion stage is pumped with the intermediate optical signal to obtain a high brightness optical signal in the third optical band.

Claims (13)

1. A brightness converter comprising:

a first brightness conversion stage having a first laser cavity having a first flexible optical fiber with a multi-mode core doped with an active ion defining a first optical band with optical absorption, a second optical band with optical absorption and optical gain, and a third optical band with optical gain, said first laser cavity being pumped with a pump power having a peak wavelength in said first optical band to generate an intermediate multi-mode optical signal in said second optical band; and a second brightness conversion stage having a second laser cavity and arranged in cascade with said first brightness conversion stage, said second laser cavity having a second flexible optical fiber with a core doped with said active ion and a cladding surrounding the core, said second brightness conversion stage being coupled to the first brightness conversion stage in a manner that the intermediate multi-mode optical signal emitted by the core of the first flexible optical fiber be pumped into the cladding and the core of the second flexible optical fiber, the second laser cavity thence generating a high brightness optical signal in said third optical band.
2. The brightness converter as claimed in claim 1, wherein said active ion is Ytterbium.
3. The brightness converter as claimed in claim 2, wherein said first optical band comprises wavelengths between 915 nm and 976 nm.
4. The brightness converter as claimed in claim 3, wherein said second optical band comprises wavelengths between 1020 nm and 1030 nm.
5. The brightness converter as claimed in claim 4, wherein said third optical band comprises the wavelength of 1080 nm.
6. The brightness converter as claimed in any one of claims 1 to 5, wherein said first flexible optical fiber and said second flexible optical fiber are each an all glass Double Cladding Optical Fiber (DCOF).
7. The brightness converter as claimed in any one of claims 1 to 6, wherein a diameter of the cladding of the second flexible optical fiber corresponds to a diameter of the core of the first flexible optical fiber.
8. The brightness converter as claimed in any one of claims 1 to 7, wherein said first optical waveguide is multimode when propagating said intermediate optical signal and wherein said second optical waveguide is single-mode when propagating said high brightness optical signal.
9. The brightness converter as claimed in any one of claims 1 to 8, wherein said first laser cavity comprises a high reflectivity fiber Bragg grating positioned at an input of said first optical waveguide and a low reflectivity fiber Bragg grating positioned at an output of said first optical waveguide.
10. The brightness converter as claimed in any one of claims 1 to 9, further comprising a low-brightness pump source coupled to said first laser cavity, for generating said pump power.
11. A method for generating a high brightness optical signal, the method comprising:

pumping with a pump power a laser cavity having a first flexible optical fiber doped with an active ion defining a first optical band with optical absorption, a second optical band with optical absorption and optical gain, and a third optical band with optical gain, said pump power having a peak wavelength in said first optical band;

generating a multi-mode intermediate optical signal in said second optical band in said laser cavity as a result of said pumping with a pump power;

pumping with said intermediate optical signal a second laser cavity having a second flexible optical fiber doped with said active ion;

obtaining within said second flexible optical fiber a high brightness optical signal in said third optical band as a result of said pumping with said intermediate optical signal; and outputting said high brightness optical signal from said second flexible optical fiber.
12. The method as claimed in claim 11, further comprising propagating said high brightness optical signal with a single mode within said second flexible optical fiber.
13. The method as claimed in any one of claims 11 or 12, wherein said first flexible optical fiber is an all glass Double Cladding Optical Fiber (DCOF) having a first core, a first inner cladding and a first outer cladding and wherein said second flexible optical fiber is an all glass DCOF having second first core, a second inner cladding and a second outer cladding and wherein said method further comprises propagating said pump power in said first inner cladding, propagating said intermediate optical signal in said first core, propagating said intermediate optical signal in said second inner cladding and propagating said high brightness optical signal in said second core.
CA2749988A 2009-01-23 2010-01-19 Two-stage brightness converter Active CA2749988C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US14681209P 2009-01-23 2009-01-23
US61/146,812 2009-01-23
PCT/CA2010/000080 WO2010083595A1 (en) 2009-01-23 2010-01-19 Two-stage brightness converter

Publications (2)

Publication Number Publication Date
CA2749988A1 true CA2749988A1 (en) 2010-07-29
CA2749988C CA2749988C (en) 2012-07-24

Family

ID=42355457

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2749988A Active CA2749988C (en) 2009-01-23 2010-01-19 Two-stage brightness converter

Country Status (4)

Country Link
JP (1) JP2012516040A (en)
CN (1) CN102292883A (en)
CA (1) CA2749988C (en)
WO (1) WO2010083595A1 (en)

Families Citing this family (12)

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US8351113B2 (en) * 2010-09-02 2013-01-08 Textron Systems Corporation High power fiber laser system
FR2971640B1 (en) 2011-02-16 2014-04-04 Univ Bordeaux 1 OPTICAL PUMPING DEVICE.
JP2012238781A (en) * 2011-05-13 2012-12-06 Mitsubishi Electric Corp FIBER LASER OSCILLATOR AND FIBER LASER AMPLIFIER USING Yb ADDITION GLASS FIBER
JP2014033098A (en) * 2012-08-03 2014-02-20 Fujikura Ltd Fiber laser device
CN107623246B (en) * 2016-07-14 2020-11-17 中国兵器装备研究院 Fiber core co-band pumping fiber laser
US11211765B2 (en) 2016-10-13 2021-12-28 Nlight, Inc. Tandem pumped fiber amplifier
CN110073557B (en) * 2016-10-13 2021-05-11 恩耐公司 Tandem pumping optical fiber amplifier
WO2018186920A2 (en) 2017-01-12 2018-10-11 Nlight, Inc. Tandem pumped fiber laser or fiber amplifier
CN113169504A (en) * 2018-11-26 2021-07-23 恩耐公司 Tandem pumping optical fiber amplifier
CN110086070B (en) * 2019-05-19 2020-10-16 北京工业大学 Novel thin-chip laser structure with high pumping absorption and high power output
CN113708209A (en) * 2021-08-29 2021-11-26 光惠（上海）激光科技有限公司 Frequency conversion temperature control fiber laser system
CN114336244A (en) * 2021-12-31 2022-04-12 湖南大科激光有限公司 Optical fiber laser

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Publication number Priority date Publication date Assignee Title
US5422897A (en) * 1994-01-28 1995-06-06 British Telecommunications Public Limited Company Two-stage mono-mode optical fibre laser
US5933437A (en) * 1996-09-26 1999-08-03 Lucent Technologies Inc. Optical fiber laser
US5953353A (en) * 1997-11-20 1999-09-14 Lucent Technologies Inc. Article comprising an improved rare earth-doped optical fiber laser
US6944192B2 (en) * 2001-03-14 2005-09-13 Corning Incorporated Planar laser
JP2003086868A (en) * 2001-09-12 2003-03-20 Toshiba Corp Optical fiber laser device
US7106928B2 (en) * 2002-01-22 2006-09-12 Dykaar Douglas R Coupling high power optical sources to small diameter fibers
DE602004031164D1 (en) * 2003-02-07 2011-03-03 Spi Lasers Uk Ltd Device for emitting optical radiation
US20060280217A1 (en) * 2003-06-12 2006-12-14 Spi Lasers Uk Ltd. Optical apparatus, comprising a brightness converter, for providing optical radiation
JP2006108426A (en) * 2004-10-06 2006-04-20 Kansai Electric Power Co Inc:The Optical fiber raman laser
WO2008046159A1 (en) * 2006-10-18 2008-04-24 The Commonwealth Of Australia Cascade laser

Also Published As

Publication number Publication date
CN102292883A (en) 2011-12-21
JP2012516040A (en) 2012-07-12
WO2010083595A1 (en) 2010-07-29
CA2749988C (en) 2012-07-24

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