WO2021014853A1 - 発光装置及び光ファイバ - Google Patents

発光装置及び光ファイバ Download PDF

Info

Publication number
WO2021014853A1
WO2021014853A1 PCT/JP2020/024313 JP2020024313W WO2021014853A1 WO 2021014853 A1 WO2021014853 A1 WO 2021014853A1 JP 2020024313 W JP2020024313 W JP 2020024313W WO 2021014853 A1 WO2021014853 A1 WO 2021014853A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
wavelength conversion
light emitting
emitting device
excitation
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.)
Ceased
Application number
PCT/JP2020/024313
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
孝典 明田
田中　健一郎
宮永　憲明
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.)
Panasonic Corp
Institute for Laser Technology
Original Assignee
Panasonic Corp
Institute for Laser Technology
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 Panasonic Corp, Institute for Laser Technology filed Critical Panasonic Corp
Priority to US17/628,397 priority Critical patent/US11868023B2/en
Priority to CN202080052603.XA priority patent/CN114144711B/zh
Priority to JP2021533873A priority patent/JP7223140B2/ja
Priority to EP20843791.3A priority patent/EP4001749B1/en
Publication of WO2021014853A1 publication Critical patent/WO2021014853A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

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
    • H01S3/06754—Fibre amplifiers
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/35—Non-linear optics
    • G02F1/365—Non-linear optics in an optical waveguide structure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/30—Elements containing photoluminescent material distinct from or spaced from the light source
    • 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
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0003—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being doped with fluorescent agents
    • 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
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0005—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being of the fibre type
    • G02B6/0006—Coupling light into the fibre
    • 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
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0005—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being of the fibre type
    • G02B6/0008—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being of the fibre type the light being emitted at the end of the fibre
    • 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
    • G02B6/262—Optical details of coupling light into, or out of, or between fibre ends, e.g. special fibre end shapes or associated optical elements
    • 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
    • G02B6/34—Optical coupling means utilising prism or grating
    • 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
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/35—Non-linear optics
    • G02F1/353—Frequency conversion, i.e. wherein a light beam is generated with frequency components different from those of the incident light beams
    • 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
    • H01S3/005—Optical devices external to the laser cavity, specially adapted for lasers, e.g. for homogenisation of the beam or for manipulating laser pulses, e.g. pulse shaping
    • H01S3/0064—Anti-reflection devices, e.g. optical isolaters
    • 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
    • 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
    • H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • 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
    • H01S3/1605—Solid materials characterised by an active (lasing) ion rare earth terbium
    • 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
    • H01S3/1613—Solid materials characterised by an active (lasing) ion rare earth praseodymium
    • 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
    • H01S3/09403—Cross-pumping, e.g. Förster process involving intermediate medium for excitation transfer
    • 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
    • H01S5/00—Semiconductor lasers
    • H01S5/40—Arrangement of two or more semiconductor lasers, not provided for in groups H01S5/02 - H01S5/30
    • H01S5/4012—Beam combining, e.g. by the use of fibres, gratings, polarisers, prisms

Definitions

  • the present disclosure generally relates to a light emitting device and an optical fiber, and more particularly to a light emitting device and an optical fiber having a wavelength conversion unit that emits light having a wavelength different from that of excitation light.
  • the optical transmission fiber has a first end face and a second end face, and the excitation light emitted from the solid-state light source is introduced from the first end face.
  • the optical transmission fiber has a wavelength conversion core, a light guide core, and a cladding.
  • the wavelength conversion core includes a wavelength conversion material that absorbs excitation light to generate an inverted distribution state of electrons and emits wavelength conversion light in the visible light region.
  • the light guide core covers the periphery of the wavelength conversion core and transmits the wavelength conversion light from the first end face side to the second end face side.
  • the clad covers the periphery of the light guide core.
  • the optical transmission fiber is configured such that stimulated emission is generated by wavelength-converted light propagating in the light guide core, and excitation light emitted from a solid-state light source and wavelength-converted light amplified by stimulated emission are emitted from the second end face. There is.
  • An object of the present disclosure is to provide a light emitting device and an optical fiber capable of increasing the intensity of light having a wavelength different from that of excitation light.
  • the light emitting device includes an optical fiber, a first light source unit, and a second light source unit.
  • the optical fiber has a light incident part, a light emitting part, and a wavelength conversion part.
  • the wavelength conversion unit is provided between the light incident unit and the light emitting unit.
  • the wavelength conversion unit includes a wavelength conversion material.
  • the wavelength conversion material is excited by the excitation light, generates naturally emitted light having a wavelength longer than that of the excitation light, and amplifies the naturally emitted light to generate naturally emitted amplified light.
  • the first light source unit causes the excitation light to enter the light incident portion.
  • the second light source unit causes the light incident portion to receive seed light for generating stimulated emission light from the wavelength conversion material excited by the excitation light or the natural emission amplified light.
  • the optical fiber of one aspect according to the present disclosure includes a light incident part, a light emitting part, and a wavelength conversion part.
  • the wavelength conversion unit is provided between the light incident unit and the light emitting unit.
  • the wavelength conversion unit includes a wavelength conversion material.
  • the wavelength conversion material is excited by the excitation light, generates naturally emitted light having a wavelength longer than that of the excitation light, and amplifies the naturally emitted light to generate naturally emitted amplified light.
  • the excitation light and seed light for generating stimulated emission light from the wavelength conversion material excited by the excitation light or the natural emission amplified light are incident on the light incident portion.
  • FIG. 1 is a configuration diagram of a light emitting device according to the first embodiment.
  • FIG. 2 is an explanatory diagram of the operating principle of the light emitting device of the same.
  • FIG. 3 is an explanatory diagram of the energy level of Pr 3+ ions used in the same light emitting device.
  • FIG. 4 is a block diagram of the light emitting device according to the second embodiment.
  • FIG. 5 is a block diagram of the light emitting device according to the third embodiment.
  • FIG. 6 is a block diagram of the light emitting device according to the fourth embodiment.
  • the light emitting device 1 supplies excitation light P1 for exciting the wavelength conversion material and stimulated emission light P3 from the wavelength conversion material excited by the excitation light P1 to the optical fiber 2 to which the wavelength conversion material is added.
  • the seed light P2 for generating is incident.
  • the optical fiber 2 may be added with at least one kind of wavelength conversion material.
  • Light P4 including excitation light P1 and stimulated emission light P3 is emitted from the optical fiber 2.
  • FIG. 2 is an explanatory diagram of the operating principle of the light emitting device 1.
  • the excitation light P1 incident on the optical fiber 2 excites the electron e ⁇ at the base level E0 (including a plurality of energy levels) of the wavelength conversion material to the excitation level E2.
  • the electron e ⁇ of the excitation level E2 transitions to the metastable level E1 having a lower energy than the excitation level E2. Then, for example, by seed light P2 having a wavelength corresponding to the energy difference between the upper energy level (hereinafter, also referred to as the first energy level) among the plurality of energy levels of the quasi-stable level E1 and the basal level E0.
  • the induced emission light P3 is generated when the electron e ⁇ of the semi-stable level E1 transitions to the first energy level.
  • the electron e of the quasi-stable level E1 is generated by seed light having a wavelength corresponding to the energy difference between the quasi-stable level E1 and another energy level lower than the quasi-stable level E1 (hereinafter, also referred to as a second energy level). - even when transitioning to the second energy level, the stimulated emission light is generated.
  • the light emitting device 1 can be applied to, for example, a lighting fixture, a lighting device, a lighting system, a projector, a printing device, an endoscopic light source, and the like.
  • the light emitting device 1 is not limited to the case where it is applied to a device or system for a house, and may be applied to, for example, a device or system for a facility or a device or system for a mobile body. ..
  • the moving body is, for example, a car, a bicycle, a train, an airplane, a ship, a drone, or the like.
  • the light emitting device 1 includes an optical fiber 2, a first light source unit 11, and a second light source unit 12.
  • the first light source unit 11 causes the excitation light P1 to enter the light incident unit 21.
  • the second light source unit 12 causes the light incident unit 21 to receive seed light P2 (hereinafter, also referred to as external seed light P2) for generating stimulated emission light P3 from the wavelength conversion material excited by the excitation light P1.
  • the optical fiber 2 has a core 3, a clad 4, and a covering portion 5.
  • the clad 4 covers the outer peripheral surface of the core 3.
  • the covering portion 5 covers the outer peripheral surface of the clad 4.
  • the cross-sectional shape orthogonal to the optical axis direction is a circular shape.
  • the clad 4 is arranged coaxially with the core 3.
  • the core 3 has a first end surface 31 and a second end surface 32 on the side opposite to the first end surface 31 in the length direction of the core 3.
  • the core 3 includes a translucent material and the wavelength conversion material described above.
  • the concentration of the wavelength conversion material in the core 3 may or may not be substantially uniform over the entire length of the core 3.
  • the refractive index of the core 3 is substantially the same as the refractive index of the above-mentioned translucent material which is the main component of the core 3.
  • the translucent material is, for example, either fluoride, oxide, or nitride.
  • the fluoride is, for example, fluoride glass.
  • the oxide is, for example, silicon oxide, quartz or the like.
  • the wavelength conversion material is a rare earth element.
  • the wavelength conversion material contains, for example, an element selected from the group of Pr, Tb, Ho, Dy, Er, Eu, Nd and Mn.
  • the wavelength conversion material is contained in the core 3 as an ion of a rare earth element, and is contained, for example, as an ion of Pr (Pr 3+ ) and an ion of Tb (Tb 3+ ).
  • the wavelength conversion material is excited by the excitation light P1 or by the light amplified by using the spontaneous emission light emitted from the wavelength conversion material as the internal seed light, that is, the natural emission amplified light (ASE). May be good.
  • the wavelength conversion material emits ASE peculiar to the element of the wavelength conversion material, and also generates stimulated emission light having the same wavelength as the wavelength of the external seed light P2, and these are combined to generate stimulated emission. It is emitted as light P3.
  • the wavelengths of the ASE and the external seed light P2 are longer than the wavelength of the excitation light P1 (for example, 440 nm or more and 450 nm or less).
  • the wavelength of the seed light P2 will be described in the column of "(2.3) Second light source unit".
  • FIG. 3 is an example of an energy level diagram of Pr 3+ (for FIG. 3, reference 1 [C. Krankel, et al., “Out of the blue: semiconductor laser pumpedvisible rare-earth doped lasers”, Laser Photonics). Rev. 10, 548 (2016)]).
  • the vertical axis of FIG. 3 is electron energy.
  • the notation on the right side of FIG. 3 is the Russel-Saunders notation representing the electronic configuration.
  • the upward arrow in FIG. 3 indicates the absorption of the excitation light
  • the downward arrow indicates the transition regarding the spontaneous emission light or the stimulated emission light.
  • Pr 3+ is a wavelength conversion material (wavelength conversion element) capable of emitting amplified light of ASE or seed light in the range of cyan to red.
  • the intensity of stimulated emission depends on the intensity of internal seed light (spontaneous emission light) and external seed light.
  • Tb 3+ can be excited by absorbing ASE from Pr 3+ to generate ASE having a wavelength peculiar to Tb 3+ .
  • the refractive index of the clad 4 is smaller than the refractive index of the core 3.
  • the clad 4 does not contain the wavelength conversion material contained in the core 3.
  • the covering portion 5 covers the outer peripheral surface of the clad 4.
  • the material of the covering portion 5 is, for example, a resin.
  • the optical fiber 2 has a light incident unit 21, a light emitting unit 22, and a wavelength conversion unit 23.
  • the light incident portion 21 is a portion where the excitation light P1 is incident, and includes, for example, the first end surface 31 of the core 3.
  • the light emitting unit 22 includes a second end surface 32 of the core 3 from which light including excitation light P1 and stimulated emission light P3 including ASE is emitted.
  • the light incident portion 21 may include a reflection reducing portion that reduces the reflection of the excitation light P1 incident on the light incident portion 21 from the outside of the optical fiber 2.
  • the reflection reducing portion may be, for example, an anti-reflection coat that covers the first end surface 31 of the core 3. It is desirable to have a non-reflective coating for light in the deep infrared region with a wavelength of 700 nm or more.
  • the light emitting unit 22 includes a reflection reducing unit 6 that reduces the reflection of the stimulated emission light P1 including the excitation light P1 and the stimulated emission light P3 including the ASE.
  • the reflection reducing unit 6 can be preferably made of, for example, a transparent material having a refractive index substantially equal to that of the core 3.
  • the reflection reduction unit 6 includes, for example, an end cap. Since the light emitting portion 22 includes the reflection reducing portion 6, the optical fiber 2 can suppress the electric field enhancement due to the reflection on the second end surface 32 of the core 3, and protects the second end surface 32 of the core 3 from laser damage. You can also do it.
  • the optical fiber 2 includes a reflection reducing portion 6 bonded to the second end surface 32 of the core 3.
  • the material of the reflection reducing portion 6 may be fluoride glass, silicon oxide, or quartz.
  • the light emitting unit 22 includes an inclined surface 221 inclined at a predetermined angle (for example, 8 degrees) with respect to a surface orthogonal to the optical axis of the optical fiber 2.
  • the predetermined angle is not limited to 8 degrees.
  • the predetermined angle is, for example, preferably 2 degrees or more, more preferably 4 degrees or more, and further preferably 6 degrees or more. Further, the predetermined angle is, for example, preferably 20 degrees or less, more preferably 16 degrees or less, and further preferably 12 degrees or less.
  • the length of the end cap in the optical axis direction of the optical fiber 2 is, for example, 100 ⁇ m or more and 3 mm or less.
  • the end cap is arranged so as to straddle the core 3 and the clad 4, but may be arranged at least on the second end surface 32 of the core 3.
  • the reflection reducing portion 6 is not limited to the end cap, and may have, for example, a fine uneven structure of 200 nm or less included in the second end surface 32 of the core 3. In this case, from the viewpoint of reducing reflection, the presence or absence of the end cap may be used.
  • the wavelength conversion unit 23 is provided between the light incident unit 21 and the light emitting unit 22.
  • the wavelength conversion unit 23 includes a wavelength conversion material.
  • the wavelength conversion material is excited by the excitation light P1 and emits light having a wavelength longer than that of the excitation light P1.
  • the wavelength conversion material is a material capable of absorbing the excitation light P1 and amplifying naturally emitted light or seed light having a wavelength longer than that of the excitation light P1 by stimulated emission.
  • the wavelength conversion unit 23 is the entire portion between the light incident unit 21 and the light emitting unit 22 in the core 3, but the wavelength conversion unit 23 is not limited to this and may be a part. That is, in the optical fiber 2, the wavelength conversion material may be added over the entire area of the core 3, or the wavelength conversion material may be added to a part of the core 3.
  • the diameter of the core 3 is, for example, 25 ⁇ m or more and 500 ⁇ m or less.
  • the length of the optical fiber 2 is, for example, 1 cm or more and 10 m or less.
  • the length of the optical fiber 2 is preferably 10 cm or more, more preferably 30 cm or more, and further preferably 1 m or more.
  • the length of the wavelength conversion unit 23 is preferably longer as the concentration of the wavelength conversion material in the wavelength conversion unit 23 is lower.
  • the numerical aperture of the optical fiber 2 is, for example, 0.22.
  • the first light source unit 11 emits excitation light P1 for exciting the wavelength conversion material contained in the wavelength conversion unit 23 of the optical fiber 2.
  • the excitation light P1 emitted from the first light source unit 11 is incident on the light incident unit 21 of the optical fiber 2.
  • the first light source unit 11 includes, for example, a laser light source 111.
  • the laser light source 111 emits laser light.
  • the first light source unit 11 causes the laser light emitted from the laser light source 111 to enter the light incident unit 21 as excitation light P1.
  • the laser light source 111 is, for example, a semiconductor laser that emits blue laser light.
  • the excitation light P1 is, for example, 440 nm or more and 450 nm or less.
  • the laser light source 111 is not limited to a semiconductor laser that emits blue laser light, but may be an LED (Light Emitting Diode) light source or other light source, for example, a semiconductor laser that emits purple laser light.
  • the optical coupling method for incidenting the excitation light P1 onto the optical incident portion 21 of the optical fiber 2 may be fiber coupling by an optical fiber coupler or spatial coupling.
  • the first light source unit 11 includes a grating 7 arranged between the laser light source 111 and the light incident unit 21 of the optical fiber 2, and the laser emitted from the laser light source 111.
  • the light (excitation light P1) is diffracted by the grating 7 and incident on the light incident portion 21.
  • the grating 7 is, for example, a transmission type diffraction grating.
  • the material of the grating 7 is, for example, quartz, but is not limited to this.
  • Second light source unit The second light source unit 12 emits the seed light P2.
  • the seed light P2 emitted from the second light source unit 12 is incident on the light incident unit 21 of the optical fiber 2.
  • the second light source unit 12 causes a plurality of seed lights P2 having different wavelengths to be incident on the light incident unit 21 of the optical fiber 2.
  • the second light source unit 12 includes, for example, three seed light sources 121, 122, and 123 that emit light having different wavelengths from each other.
  • the seed light source 121 is, for example, a semiconductor laser or LED that emits green light.
  • the seed light source 122 is, for example, a semiconductor laser or LED that emits orange light.
  • the seed light source 123 is, for example, a semiconductor laser or LED that emits red light.
  • the wavelength conversion material of the wavelength conversion unit 23 includes Pr 3+
  • the wavelength of the green amplified light is, for example, about 520 nm
  • the wavelength of the orange amplified light is, for example, about 600 nm
  • the wavelength of the red amplified light is preferably, for example, about 640 nm (see FIG. 3).
  • the seed light sources 121 to 123 are light sources that emit quasi-monochromatic light.
  • the quasi-monochromatic light is light included in a narrow wavelength range (for example, 10 nm).
  • the second light source unit 12 uses the light emitted from the seed light source 121 as the seed light P2 (P21) and causes it to enter the light incident unit 21 of the optical fiber 2. Further, the second light source unit 12 uses the light emitted from the seed light source 122 as the seed light P2 (P22) and causes it to enter the light incident unit 21 of the optical fiber 2. The second light source unit 12 uses the light emitted from the seed light source 123 as the seed light P2 (P23) and causes the light to enter the light incident unit 21 of the optical fiber 2.
  • the second light source unit 12 shares the grating 7 with the first light source unit 11, and the light (seed light P2) emitted from the second light source unit 12 is diffracted by the grating 7 and incident on the light incident unit 21.
  • the excitation light P1 is emitted from the first light source unit 11 and the seed light P2 is emitted from the second light source unit 12.
  • the excitation light P1 and the seed light P2 are incident on the light incident portion 21 of the optical fiber 2.
  • a part of the excitation light P1 incident on the light incident portion 21 is emitted from the light emitting portion 22.
  • the light P4 emitted from the light emitting unit 22 of the optical fiber 2 is the excitation light P1, the ASE having a wavelength of about 480 nm generated from the wavelength conversion material, and the light obtained by amplifying the seed light P2 (seed light).
  • the mixed color light is a mixed color light (light having the same wavelength as P2).
  • the four types of induced emission light P3 having different wavelengths are, for example, cyan light, green light, orange light, and red light.
  • the mixed color light is, for example, white light.
  • stimulated emission is generated by spontaneous emission light and seed light P2, so that the excitation light P1 incident on the light incident portion 21 and the stimulated emission light P3 amplified by the stimulated emission are emitted from the light emitting portion 22. ..
  • the mixed color light emitted from the light emitting unit 22 of the optical fiber 2 is incoherent light.
  • the stimulated emission light P3 increases or decreases as the light incident portion 21 of the optical fiber 2 approaches the light emitting portion 22.
  • the chromaticity, color temperature, color rendering property, etc. of the light P4 emitted from the light emitting unit 22 of the optical fiber 2 are determined according to the wavelengths of the ASE and the seed light P2.
  • the operation of the light emitting device 1 is different from the operation of the fiber laser that oscillates the laser.
  • the wavelength conversion material serving as a heat generating source is dispersed in the core 3 of the optical fiber 2, the temperature rise during use can be suppressed.
  • the light emitting device 1 may include a lens 8 arranged between the grating 7 and the light incident portion 21.
  • the lens 8 is a lens for efficiently introducing the excitation light P1 and the seed light P2 into the light incident portion 21 of the optical fiber 2.
  • the light emitting device 1 may further have an adjusting unit for adjusting the intensity of each of the plurality of seed lights P2. As a result, the light emitting device 1 can adjust the chromaticity of the light P4 emitted from the light emitting unit 22 of the optical fiber 2. In short, the light emitting device 1 enables color matching.
  • the adjusting unit is, for example, an optical member arranged between the plurality of seed light sources 121 to 123 of the second light source unit 12 and the optical fiber 2, and includes a plurality of wavelength filters.
  • Each of the plurality of wavelength filters is an optical element including, for example, an optical multilayer film.
  • the adjusting unit is not limited to an optical member including a plurality of wavelength filters, and may be, for example, a plurality of driving devices that drive a plurality of seed light sources 121 to 123 of the second light source unit 12 on a one-to-one basis.
  • the light emitting device 1 includes an optical fiber 2, a first light source unit 11, and a second light source unit 12.
  • the optical fiber 2 includes a light incident unit 21, a light emitting unit 22, and a wavelength conversion unit 23.
  • the wavelength conversion unit 23 is provided between the light incident unit 21 and the light emitting unit 22.
  • the wavelength conversion unit 23 includes a wavelength conversion material that is excited by the excitation light P1 to generate spontaneous emission light having a wavelength longer than that of the excitation light P1 and amplifies the spontaneous emission light to generate natural emission amplified light.
  • the first light source unit 11 causes the excitation light P1 to enter the light incident unit 21.
  • the second light source unit 12 causes the light incident unit 21 to receive seed light P2 for generating stimulated emission light P3 from the wavelength conversion material excited by the excitation light P1 or the natural emission amplified light.
  • seed light P2 for generating stimulated emission light P3 from the wavelength conversion material excited by the excitation light P1 or the natural emission amplified light.
  • the wavelength conversion unit 23 contains Pr 3+ as a wavelength conversion material, and not only emits cyan-colored ASE, but also emits a plurality of seed lights P2 having different wavelengths from each other. Since the light is incident on the light incident portion 21, the intensity of each of the green stimulated emission light, the orange stimulated emission light, and the red stimulated emission light can be increased. As a result, the light emitting device 1 according to the first embodiment can improve the color rendering property of the light P4 emitted from the light emitting unit 22 of the optical fiber 2.
  • the wavelength conversion unit 23 contains Pr 3+ and Tb 3+ as the wavelength conversion material, the color rendering of the light P4 emitted from the light emission unit 22 of the optical fiber 2 It is possible to further improve the sex.
  • Tb 3+ absorbs the cyan-colored ASE from Pr 3+, not only optimizes the cyan-colored ASE intensity, but also generates a yellow-green (wavelength of about 550 nm) ASE.
  • the optical fiber 2 according to the first embodiment includes a light incident unit 21, a light emitting unit 22, and a wavelength conversion unit 23.
  • the wavelength conversion unit 23 is provided between the light incident unit 21 and the light emitting unit 22.
  • the wavelength conversion unit 23 includes a wavelength conversion material.
  • the wavelength conversion material is excited by the excitation light P1 to generate spontaneous emission light having a wavelength longer than that of the excitation light P1 and amplifies the spontaneous emission light by induced emission to generate natural emission amplified light.
  • the excitation light P1 and the seed light P2 for generating stimulated emission light P3 from the wavelength conversion material excited by the excitation light P1 or the natural emission amplified light are incident on the light incident portion 21.
  • the optical fiber 2 according to the first embodiment can increase the intensity of light having a wavelength different from that of the excitation light P1 (stimulated emission light P3).
  • the light emitting device 1a according to the second embodiment includes a grating 7 in the light emitting device 1 according to the first embodiment, a plurality of seed light sources 121 to 123 (three in the illustrated example) of the second light source unit 12, and an optical fiber 2. It does not have an adjustment unit that is placed between the two.
  • the light emitting device 1a according to the second embodiment is different from the light emitting device 1 according to the first embodiment in that it includes a lens 9 arranged between the first light source unit 11 and the second light source unit 12 and the light incident unit 21. To do.
  • the first light source unit 11 and the second light source unit 12 are arranged on one mounting board 100.
  • the first light source unit 11 includes a laser light source 111.
  • the second light source unit 12 includes a plurality of seed light sources 121 to 123.
  • the lens 9 is, for example, a condensing lens for efficiently introducing the excitation light P1 emitted from the first light source unit 11 and the seed light P2 emitted from the second light source unit 12 into the light incident portion 21 of the optical fiber 2. Is.
  • the wavelength conversion unit 23 is excited by the excitation light P1 to generate spontaneous emission light having a wavelength longer than that of the excitation light P1 and naturally. Includes a wavelength conversion material that amplifies emitted light to generate spontaneous emission amplified light.
  • the first light source unit 11 causes the excitation light P1 to enter the light incident unit 21.
  • the second light source unit 12 causes the light incident unit 21 to receive seed light P2 for generating stimulated emission light P3 from the wavelength conversion material excited by the excitation light P1 or the natural emission amplified light.
  • the light emitting device 1a has a plurality of seed light sources 121 to 12 of the second light source unit 12 as adjusting units for adjusting the intensities of the plurality of seed lights P2 (P21), P (P22), and P2 (P23).
  • a plurality of driving devices for driving the 123 one-to-one may be provided.
  • the first light source unit 11 and the second light source unit 12 have a white light source 15 and a grating 17 for spectroscopy.
  • the white light source 15 is, for example, a white LED including a blue LED chip and a wavelength conversion layer.
  • the blue LED chip emits blue light.
  • the wavelength conversion layer covers the blue LED chip.
  • the wavelength conversion layer contains wavelength conversion material particles that are excited by blue light emitted from a blue LED chip and emit yellow light.
  • the white light source 15 is mounted on the mounting board 101.
  • the grating 17 for spectroscopy disperses white light into, for example, excitation light P1 (blue light) and a plurality of (three in the illustrated example) seed lights P21, P22, and P23.
  • the seed light P21 is, for example, green light.
  • the seed light P22 is, for example, orange light.
  • the seed light P23 is, for example, red light.
  • the grating 17 is a transmission type diffraction grating.
  • the material of the grating 17 is, for example, quartz, but is not limited to this.
  • the light emitting device 1b further includes a collimating lens 16, a collimating lens 18A, an adjusting unit 10, a collimating lens 18B, and a condensing lens 19.
  • the collimating lens 16 is arranged between the white light source 15 and the grating 17 for spectroscopy.
  • the collimating lenses 18A and 18B are arranged between the grating 17 and the grating 7 for spectroscopy.
  • the condenser lens 19 is arranged between the grating 7 and the light incident portion 21 of the optical fiber 2.
  • the collimating lens 16 causes the white light emitted from the white light source 15 to enter the grating 17 for spectroscopy.
  • the collimating lens 18A collimates the excitation light P1 from the grating 17 for spectroscopy and the plurality of seed lights P21, P22, P23.
  • the adjusting unit 10 adjusts the intensities of each of the plurality of seed lights P21, P22, and P23.
  • the adjusting unit 10 includes, for example, a filter that controls the transmission wavelength, a liquid crystal filter that can adjust the transmittance, and the like.
  • the collimating lens 18B causes the excitation light P1 and the plurality of seed lights P21, P22, and P23 to enter the grating 7.
  • the grating 7 diffracts the incident excitation light P1 and a plurality of seed lights P21, P22, P23.
  • the condenser lens 19 causes the excitation light P1 from the grating 7 and the seed lights P21, P22, and P23 to enter the light incident portion 21.
  • the wavelength conversion unit 23 includes a wavelength conversion material as in the light emitting device 1 according to the first embodiment.
  • the wavelength conversion material is excited by the excitation light P1 to generate spontaneous emission light having a wavelength longer than that of the excitation light P1 and amplifies the spontaneous emission light by induced emission to generate natural emission amplified light.
  • the first light source unit 11 causes the excitation light P1 to enter the light incident unit 21.
  • the second light source unit 12 causes the light incident unit 21 to receive seed light P2 for generating stimulated emission light P3 from the wavelength conversion material excited by the excitation light P1 or the natural emission amplified light.
  • the light emitting device 1c according to the fourth embodiment is different from the light emitting device 1 according to the first embodiment in that the optical fiber 2c is provided instead of the optical fiber 2 in the light emitting device 1 according to the first embodiment.
  • the optical fiber 2c further includes a first optical fiber 13 and a second optical fiber 14 coupled to the first end surface 31 of the core 3.
  • the first optical fiber 13 has a core 131 to which no wavelength conversion material is added.
  • the second optical fiber 14 has a core 141 to which no wavelength conversion material is added.
  • the material of the core 131 is, for example, the same as the main component of the core 3.
  • the material of the core 141 is, for example, the same as the main component of the core 3.
  • the refractive index of the core 131 and the core 141 is preferably the same as the refractive index of the core 3.
  • the light incident portion 21 includes a first light incident portion 211 and a second light incident portion 212.
  • the excitation light P1 is incident on the first light incident portion 211.
  • the second light incident portion 212 is provided separately from the first light incident portion 211.
  • the seed light P2 is incident on the second light incident portion 212.
  • a plurality of seed lights P2 are incident on the second light incident portion 212.
  • the first light incident portion 211 is composed of the first optical fiber 13.
  • the second light incident portion 212 is composed of the second optical fiber 14.
  • the optical fiber 2c includes a plurality of first light incident portions 211. Therefore, the light emitting device 1c includes a plurality of first light incident units 211.
  • the light emitting device 1c includes a plurality of first light source units 11. The plurality of first light source units 11 are arranged so as to have a one-to-one correspondence with the plurality of first light incident units 211.
  • the optical fiber 2c according to the fourth embodiment includes a light incident unit 21, a light emitting unit 22, and a wavelength conversion unit 23, similarly to the optical fiber 2 according to the first embodiment.
  • the wavelength conversion unit 23 is provided between the light incident unit 21 and the light emitting unit 22.
  • the wavelength conversion unit 23 includes a wavelength conversion material.
  • the wavelength conversion material is excited by the excitation light to generate spontaneous emission light having a wavelength longer than that of the excitation light P1, and the spontaneous emission light is amplified by the induced emission to generate the natural emission amplified light.
  • the excitation light P1 and the seed light P2 for generating stimulated emission light P3 from the wavelength conversion material excited by the excitation light P1 or the natural emission amplified light are incident on the light incident portion 21.
  • the optical fiber 2c according to the fourth embodiment can increase the intensity of light having a wavelength different from that of the excitation light P1 (stimulated emission light P3).
  • the optical fiber 2c according to the fourth embodiment has the first light incident portion 211 and the second light incident portion 212, the excitation light P1 and the seed light P2 can be easily incident on the light incident portion 21.
  • the number of wavelength conversion units 23 between the light incident unit 21 and the light emitting unit 22 is not limited to one, and may be, for example, a plurality.
  • the plurality of wavelength conversion units 23 are arranged in the optical axis direction of the core 3.
  • the light emitting portion 22 is not limited to the case where the inclined surface 221 inclined at a predetermined angle with respect to the surface orthogonal to the optical axis of the optical fiber 2 is included.
  • the second end surface 32 of the core 3 may be orthogonal to the optical axis of the optical fiber 2.
  • the second light source unit 12 may be composed of a plurality of LEDs.
  • the second light source unit 12 has, for example, a photo having a superlens effect between the plurality of LEDs and the light incident unit 21.
  • a nick crystal may be provided.
  • the second light source unit 12 includes a plurality of seed light sources (three seed light sources 121 to 123), but it is sufficient that the second light source unit 12 includes at least one seed light source.
  • the light emitting device 1b is provided with the white light source 15, for example, an SC (Super Continuum) light source may be provided instead of the white light source 15.
  • SC Super Continuum
  • the light emitting device (1; 1a; 1b; 1c) includes an optical fiber (2), a first light source unit (11), and a second light source unit (12).
  • the optical fiber (2) has a light incident unit (21), a light emitting unit (22), and a wavelength conversion unit (23).
  • the wavelength conversion unit (23) is provided between the light incident unit (21) and the light emitting unit (22).
  • the wavelength conversion unit (23) includes a wavelength conversion material.
  • the wavelength conversion material is excited by the excitation light (P1), generates naturally emitted light having a longer wavelength than the excitation light (P1), and amplifies the naturally emitted light to generate naturally emitted amplified light.
  • the first light source unit (11) causes the excitation light (P1) to enter the light incident unit (21).
  • the second light source unit (12) emits seed light (P2) for generating stimulated emission light (P3) from the wavelength conversion material excited by the excitation light (P1) or the natural emission amplified light (21). To be incident on.
  • the light emitting device (1; 1a; 1b; 1c) it is possible to increase the intensity of light having a wavelength different from that of the excitation light (P1) (stimulated emission light P3).
  • the wavelength conversion material is selected from the group of Pr, Tb, Ho, Dy, Er, Eu, Nd and Mn. Contains elements.
  • the light emitting device (1; 1a; 1b; 1c) for example, when two or more elements are included as the wavelength conversion material, another element is excited by excitation by natural emission amplified light from at least one element. Amplified spontaneous emission at different wavelengths from the elements can also be generated.
  • the light incident portion (21) has a plurality of seed lights (P21, P22, P23) having different wavelengths from each other. ) Is incident.
  • the light (P4) including a plurality of stimulated emission lights (P3) corresponding to a plurality of seed lights (P21, P22, P23) in a one-to-one manner. Can be emitted from the light emitting unit (22).
  • the second light source unit (12) outputs a plurality of seed lights (P21, P22, P23), respectively. (Seed light sources 121, 122, 123).
  • a mixed color light (light P4) of the excitation light (P1) and a plurality of stimulated emission lights (P3) having different wavelengths from each other is emitted from the light emitting unit (22). It is possible to emit from.
  • the light emitting device (1; 1a; 1b; 1c) according to the fifth aspect further includes an adjusting unit (10) for adjusting the intensity of each of the plurality of seed lights (P21, P22, P23) in the fourth aspect. ..
  • the chromaticity of the light (P4) emitted from the light emitting unit (22) of the optical fiber (2) can be adjusted.
  • the first light source unit (11) and the second light source unit (12) are a white light source (15) and a grating for spectroscopy (17). And have.
  • the spectroscopic grating (17) emits excitation light (P1) and a plurality of seed lights (P21, P22, P23) by dispersing white light emitted from a white light source (15).
  • the light incident portion (21) is the excitation light (P1) and the seed light (P2).
  • the light incident portion (21) is the excitation light (P1) and the seed light (P2).
  • a reflection reduction section that reduces reflection.
  • the excitation light (P1) and the seed light (P2) are incident on the light incident portion (21), they are less likely to be reflected, and the light emitting portion It is possible to increase the output of the light (P4) emitted from (22).
  • the light emitting unit (22) is orthogonal to the optical axis of the optical fiber (2). Includes an inclined surface (221) inclined at a predetermined angle with respect to the surface to be processed.
  • the light emitting portion (22) is the excitation light (P1) and the stimulated emission light (P1). It includes a reflection reduction unit (6) that reduces the reflection of P3).
  • the ninth aspect it is possible to increase the output of the light (P4) emitted from the light emitting unit (22).
  • the first light source unit (11) includes a laser light source (111).
  • the intensity of the excitation light (P1) can be increased.
  • the optical fiber (2; 2c) includes a light incident unit (21), a light emitting unit (22), and a wavelength conversion unit (23).
  • the wavelength conversion unit (23) is provided between the light incident unit (21) and the light emitting unit (22).
  • the wavelength conversion unit (23) includes a wavelength conversion material.
  • the wavelength conversion material is excited by the excitation light (P1), generates naturally emitted light having a wavelength longer than that of the excitation light (P1), and amplifies the naturally emitted light to generate naturally emitted amplified light.
  • the light incident portion (21) has an excitation light (P1) and a seed light (P2) for generating stimulated emission light (P3) from a wavelength conversion material excited by the excitation light (P1) or the natural emission amplified light. , Are incident.
  • the optical fiber (2; 2c) according to the eleventh aspect can increase the intensity of light having a wavelength different from that of the excitation light (P1) (stimulated emission light P3).
  • the light incident portion (21) has a first light incident portion (211) and a second light incident portion (212). Excitation light (P1) is incident on the first light incident portion (211). The second light incident portion (212) is provided separately from the first light incident portion (211). Seed light (P2) is incident on the second light incident portion (212).
  • the excitation light (P1) and the seed light (P2) can be easily incident on the light incident portion (21).

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Nonlinear Science (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Engineering & Computer Science (AREA)
  • Lasers (AREA)
  • Optical Couplings Of Light Guides (AREA)
  • Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
PCT/JP2020/024313 2019-07-19 2020-06-22 発光装置及び光ファイバ Ceased WO2021014853A1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US17/628,397 US11868023B2 (en) 2019-07-19 2020-06-22 Light-emitting device and optical fiber
CN202080052603.XA CN114144711B (zh) 2019-07-19 2020-06-22 发光装置和光纤
JP2021533873A JP7223140B2 (ja) 2019-07-19 2020-06-22 発光装置及び光ファイバ
EP20843791.3A EP4001749B1 (en) 2019-07-19 2020-06-22 Light-emitting device and optical fiber

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019-134085 2019-07-19
JP2019134085 2019-07-19

Publications (1)

Publication Number Publication Date
WO2021014853A1 true WO2021014853A1 (ja) 2021-01-28

Family

ID=74193403

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2020/024313 Ceased WO2021014853A1 (ja) 2019-07-19 2020-06-22 発光装置及び光ファイバ

Country Status (5)

Country Link
US (1) US11868023B2 (https=)
EP (1) EP4001749B1 (https=)
JP (1) JP7223140B2 (https=)
CN (1) CN114144711B (https=)
WO (1) WO2021014853A1 (https=)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021251470A1 (ja) * 2020-06-12 2021-12-16 パナソニックＩｐマネジメント株式会社 発光装置及び発光システム
WO2022239436A1 (ja) * 2021-05-14 2022-11-17 パナソニックＩｐマネジメント株式会社 照明システム
WO2022239435A1 (ja) * 2021-05-14 2022-11-17 パナソニックＩｐマネジメント株式会社 発光システム
WO2023140101A1 (ja) 2022-01-20 2023-07-27 パナソニックＩｐマネジメント株式会社 光源システム
EP4141318A4 (en) * 2020-04-24 2024-03-13 Panasonic Intellectual Property Management Co., Ltd. LIGHTING SYSTEM
JP2024516537A (ja) * 2021-04-05 2024-04-16 ペラ コンプレクシティー， ビー．ヴイ． 光導波路、光導波路システム、光閉じ込め構造、光エネルギー貯蔵構造、光エネルギー貯蔵システム、並びにエネルギー貯蔵及び／若しくは変換システム

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021215431A1 (ja) * 2020-04-24 2021-10-28 パナソニックＩｐマネジメント株式会社 投影システム
EP4142072A4 (en) * 2020-04-24 2024-02-21 Panasonic Intellectual Property Management Co., Ltd. FLUORESCENT SYSTEM

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008010720A (ja) * 2006-06-30 2008-01-17 Toshiba Corp ファイバレーザ装置
JP2010080642A (ja) * 2008-09-25 2010-04-08 Toshiba Corp ファイバレーザ装置、レーザ加工装置、並びにレーザ加工方法
WO2011055812A1 (ja) * 2009-11-09 2011-05-12 株式会社フジクラ ファイバレーザ装置
WO2013111271A1 (ja) * 2012-01-24 2013-08-01 株式会社フジクラ ファイバレーザ装置
JP2018195627A (ja) 2017-05-12 2018-12-06 パナソニックＩｐマネジメント株式会社 光源装置および照明器具

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3973769B2 (ja) * 1998-08-19 2007-09-12 富士通株式会社 波長変換のための方法及び装置
US20040042060A1 (en) * 2002-08-30 2004-03-04 Mckinstrie Colin J. Parametric amplification using two pump waves
CN1317600C (zh) * 2003-12-30 2007-05-23 武汉光迅科技股份有限公司 用自发辐射光源为辅助泵浦的增益位移型掺铥光纤放大器
US8270440B2 (en) * 2005-04-07 2012-09-18 Panasonic Corporation Laser light source and optical device
JP4299826B2 (ja) 2005-11-30 2009-07-22 株式会社住田光学ガラス 蛍光ファイバを用いた白色発光装置
US7916384B2 (en) 2006-05-02 2011-03-29 At&T Intellectual Property Ii, L.P. Feedback dynamic gain control for a WDM system employing multi wavelength pumped Raman fiber amplifiers
JP2010050126A (ja) 2008-08-19 2010-03-04 Central Glass Co Ltd Ａｓｅ光源
US9166362B2 (en) * 2011-10-19 2015-10-20 Ofs Fitel, Llc Cascaded raman lasing system
EP4142072A4 (en) * 2020-04-24 2024-02-21 Panasonic Intellectual Property Management Co., Ltd. FLUORESCENT SYSTEM

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008010720A (ja) * 2006-06-30 2008-01-17 Toshiba Corp ファイバレーザ装置
JP2010080642A (ja) * 2008-09-25 2010-04-08 Toshiba Corp ファイバレーザ装置、レーザ加工装置、並びにレーザ加工方法
WO2011055812A1 (ja) * 2009-11-09 2011-05-12 株式会社フジクラ ファイバレーザ装置
WO2013111271A1 (ja) * 2012-01-24 2013-08-01 株式会社フジクラ ファイバレーザ装置
JP2018195627A (ja) 2017-05-12 2018-12-06 パナソニックＩｐマネジメント株式会社 光源装置および照明器具

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
C. KRANKEL ET AL.: "Out of the blue: semiconductor laser pumped visible rare-earth doped lasers", LASER PHOTONICS REV., vol. 10, 2016, pages 548

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4141318A4 (en) * 2020-04-24 2024-03-13 Panasonic Intellectual Property Management Co., Ltd. LIGHTING SYSTEM
EP4166845A4 (en) * 2020-06-12 2023-11-29 Panasonic Intellectual Property Management Co., Ltd. Light emitting device and light emitting system
JPWO2021251470A1 (https=) * 2020-06-12 2021-12-16
WO2021251470A1 (ja) * 2020-06-12 2021-12-16 パナソニックＩｐマネジメント株式会社 発光装置及び発光システム
JP7457953B2 (ja) 2020-06-12 2024-03-29 パナソニックＩｐマネジメント株式会社 発光装置及び発光システム
JP2024516537A (ja) * 2021-04-05 2024-04-16 ペラ コンプレクシティー， ビー．ヴイ． 光導波路、光導波路システム、光閉じ込め構造、光エネルギー貯蔵構造、光エネルギー貯蔵システム、並びにエネルギー貯蔵及び／若しくは変換システム
JPWO2022239436A1 (https=) * 2021-05-14 2022-11-17
WO2022239435A1 (ja) * 2021-05-14 2022-11-17 パナソニックＩｐマネジメント株式会社 発光システム
WO2022239436A1 (ja) * 2021-05-14 2022-11-17 パナソニックＩｐマネジメント株式会社 照明システム
US20240302004A1 (en) * 2021-05-14 2024-09-12 Panasonic Intellectual Property Management Co., Ltd. Lighting system
JP7620949B2 (ja) 2021-05-14 2025-01-24 パナソニックＩｐマネジメント株式会社 照明システム
US12422109B2 (en) * 2021-05-14 2025-09-23 Panasonic Intellectual Property Management Co., Ltd. Lighting system
WO2023140101A1 (ja) 2022-01-20 2023-07-27 パナソニックＩｐマネジメント株式会社 光源システム
EP4467865A4 (en) * 2022-01-20 2025-05-14 Panasonic Intellectual Property Management Co., Ltd. Light source system

Also Published As

Publication number Publication date
CN114144711B (zh) 2024-06-14
US20220283354A1 (en) 2022-09-08
JP7223140B2 (ja) 2023-02-15
CN114144711A (zh) 2022-03-04
JPWO2021014853A1 (https=) 2021-01-28
EP4001749A4 (en) 2022-11-09
EP4001749A1 (en) 2022-05-25
EP4001749B1 (en) 2025-08-06
US11868023B2 (en) 2024-01-09

Similar Documents

Publication Publication Date Title
WO2021014853A1 (ja) 発光装置及び光ファイバ
JP4299826B2 (ja) 蛍光ファイバを用いた白色発光装置
JP6528344B2 (ja) 発光装置
KR20080085732A (ko) 백색 광원 장치
US20200303898A1 (en) Semiconductor Light Source
JP6868807B2 (ja) 光源装置および照明器具
CN110389486B (zh) 光源装置及显示设备
WO2013054763A1 (ja) 光源装置
JP7458039B2 (ja) 発光システム
JP2015106487A (ja) 光源装置および表示装置
CN114502879A (zh) 使用绿色磷光体的高强度彩色可调谐白色激光器光源
JP7390674B2 (ja) 投影システム
CN101322289A (zh) 激光光源装置及图像显示装置
KR20070056918A (ko) 형광 섬유를 사용한 다중 파장 레이저 광원
JP2013258119A (ja) 発光装置、および表示装置
US12422109B2 (en) Lighting system
JP2013258121A (ja) 発光装置、および表示装置
CN110998998B (zh) 激光汽车灯装置
US20230238780A1 (en) Light-emitting device and light-emitting system
JP7851291B2 (ja) ３ｄコンセントレータ
JP7618047B2 (ja) 発光装置
JP2007165763A (ja) 表示装置の照明方法および画素形成方法
JP6088160B2 (ja) 発光装置および当該発光装置を備えたバックライト
JP2021197346A (ja) 発光システム

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20843791

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2021533873

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 2020843791

Country of ref document: EP

Effective date: 20220221

WWG Wipo information: grant in national office

Ref document number: 2020843791

Country of ref document: EP