WO2006001405A1 - 光源装置 - Google Patents
光源装置 Download PDFInfo
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- WO2006001405A1 WO2006001405A1 PCT/JP2005/011698 JP2005011698W WO2006001405A1 WO 2006001405 A1 WO2006001405 A1 WO 2006001405A1 JP 2005011698 W JP2005011698 W JP 2005011698W WO 2006001405 A1 WO2006001405 A1 WO 2006001405A1
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- light
- spontaneous emission
- source device
- light source
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- 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
- H01S3/06758—Tandem amplifiers
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- 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
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- 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
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- 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
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- 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
- H01S3/06762—Fibre amplifiers having a specific amplification band
- H01S3/06766—C-band amplifiers, i.e. amplification in the range of about 1530 nm to 1560 nm
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- 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
- H01S3/06762—Fibre amplifiers having a specific amplification band
- H01S3/0677—L-band amplifiers, i.e. amplification in the range of about 1560 nm to 1610 nm
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- 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
- H01S3/06787—Bidirectional amplifier
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- 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
- H01S3/094023—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light the pumped medium being a fibre with ASE light recycling, with reinjection of the ASE light back into the fiber, e.g. by reflectors or circulators
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- 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
- H01S3/094061—Shared pump, i.e. pump light of a single pump source is used to pump plural gain media in parallel
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- 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
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- 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
- H01S3/1608—Solid materials characterised by an active (lasing) ion rare earth erbium
Definitions
- the present invention relates to a light source that generates broadband light, and more particularly to a broadband light source that generates light in the 1.55 zm band (C band) and 1.58 ⁇ m band (L band).
- an object of the present invention is to provide a light source device that can emit C-band light and L-band light simultaneously.
- the light source device has one end and the other end.
- First spontaneous emission light emitting means for emitting first spontaneous emission light by the incident first excitation light, one end connected to the other end of the first spontaneous emission light emitting means, and second excitation incident from the other end
- a second spontaneous emission light emitting means for emitting the second spontaneous emission light by light, and the second spontaneous emission light emission means is configured to convert the first spontaneous emission light incident from one end into a long wavelength having a longer wavelength. It is configured to be converted into light and emitted.
- the first spontaneous emission light emitting means has one end and the other end, and the first spontaneous emission light is generated by the first excitation light incident from the other end. Is emitted.
- the second spontaneous emission light emitting means has one end connected to the other end of the first spontaneous emission light emission means, and emits the second spontaneous emission light by the second excitation light incident from the other end. Furthermore, the second spontaneous emission light emitting means converts the first spontaneous emission light incident from one end into a long wavelength light having a longer wavelength and emits it. Further, according to the light source device of the present invention, the light source device is connected to one end of the first spontaneous emission light emitting means, and is configured to include light reflecting means for reflecting the light incident from the one end to the one end. .
- the light source device is connected to one end of the first spontaneous emission light emitting means, and is configured to include non-reflecting means that does not return the light incident from the one end to the one end.
- the light source device is configured to include a reflection reducing unit that is connected to one end of the first spontaneous emission light emitting unit and that does not substantially return the light incident from the one end to the one end.
- the first spontaneous emission light and the second spontaneous emission light are C band light
- the long wavelength light is L band light.
- the integrated emission means for emitting the second spontaneous emission light and the long wavelength light, the first excitation light generation means for generating the first excitation light, and the first excitation light A first connecting means for connecting the generating means and the other end of the first spontaneous emission light emitting means; a second excitation light generating means for generating second excitation light; a second excitation light generating means; a second spontaneous emission light A second connecting means for connecting the other end of the emitting means and the integrated emitting means, wherein the first connecting means guides the first excitation light to the other end of the first spontaneous emission light emitting means, and The spontaneous emission light is guided to one end of the second spontaneous emission light emission means, the second connection means guides the second excitation light to the other end of the second spontaneous emission light emission means, and the second spontaneous emission light and the long wavelength light Is guided to the integrated output means.
- the integrated emitting means for emitting the second spontaneous emission light and the long wavelength light, and the integrated excitation light used as the first excitation light and the second excitation light are generated.
- first connection means guides the integrated excitation light as the first excitation light to the other end of the first spontaneous emission light emission means, and the first spontaneous emission light Is guided to one end of the second spontaneous emission light output means
- second connection means guides the integrated excitation light as the second excitation light to the other end of the second spontaneous emission light output means, and the second spontaneous emission light and the length Guides wavelength light to the integrated output means Configured.
- the first connecting means is configured to be connected to the integrated pumping light generating means via the second connecting means.
- the light source device is configured to include the third connecting means for connecting the first connecting means and the second connecting means and the integrated excitation light generating means.
- the light source device is configured such that the power of the second pumping light is larger than the power of the first pumping light.
- the light source device according to the present invention is configured such that the ratio P 2 / P 1 of the power P 2 of the second pumping light to the power P 1 of the first pumping light is 3.
- the integrated emitting means is configured to have an isolator.
- the second connection means is configured to guide the second spontaneous emission light and the long wavelength light only to the integrated emission means.
- FIG. 1 shows a configuration of a light source device 1 according to a first embodiment of the present invention. It is a figure.
- FIG. 2 is a diagram showing a configuration of the light source device 1 according to the second embodiment of the present invention.
- FIG. 3 is a diagram showing a configuration of the light source device 1 according to the third embodiment of the present invention.
- FIG. 4 is a diagram showing the ratio of outgoing light and return light when one end 2 2 a of the first E D F 2 2 is connected to the open end.
- FIG. 5 is a diagram showing various non-reflective means (isolation 12a, matching jewel 12b, AR coating 12c and slant polishing edge 12d).
- FIG. 6 is a diagram showing a reflection reducing means (optical attene 1 2 e).
- FIG. 1 is a diagram showing a configuration of a light source device 1 according to a first embodiment of the present invention.
- the light source device 1 has a reflection end (light reflection means) 1 2, a first EDF (first spontaneous emission light emission means) 2 2, a second EDF (second spontaneous emission light emission means) 2 4, and an integrated excitation light source 3 2
- Reflection end (light reflecting means) 1 2 reflects incident light.
- the reflection end 1 2 is, for example, a gold deposition end.
- Reflective end 1 2 is one end of first EDF 2 2 2 2 2
- the light incident from a may be returned to the one end 2 2 a of the first ED F 2 2.
- the first EDF (first spontaneous emission light emitting means) 2 2 is an EDF (Erbium-Doped Fiber). One end 2 2 a of the first EDF 2 2 is connected to the reflection end 1 2.
- the second EDF (second spontaneous emission light emitting means) 24 is an EDF (Erbium-Doped Fiber). One end 2 4 a of the second EDF 2 4 is connected to the other end 2 2 b of the first EDF 2 2.
- the integrated excitation light source 32 is a light source that emits integrated excitation light having a wavelength of 980 nm.
- the integrated pump light is used as the first pump light L 1 incident on the first EDF 2 2 and the second pump light L 2 incident on the second EDF 2 4.
- the integrated emitting means 50 receives the light emitted from the other end 24 b of the second EDF 24 and emits it to the outside of the light source device 1.
- the integrated emitting means 50 has an isolare 52.
- the isolay 52 passes light in the direction exiting from the other end 2 4 b of the second EDF 2 4, but does not pass light in the direction incident on the other end 2 4 b of the second EDF 2 4.
- the second force bra (second connection means) 44 connects the integrated excitation light source 3 2, the other end 2 4 b of the second EDF 2 4, and the integrated emission means 50.
- the second force bra 44 emits from the other end 2 4 b of the second EDF 24.
- Light (second spontaneous emission light L 14 and long wavelength light L 22) is guided only to the integrated emission means 50.
- the second force bra 44 guides the integrated excitation light emitted from the integrated excitation light source 32 to the other end 24 b of the second ED F 24 and the first force bra 42.
- the light guided to the first force bra 42 is the first pump light L 1
- the light guided to the other end 24 b of the second EDF 24 is the second pump light L 2.
- the first force bra (first connecting means) 42 connects the integrated excitation light source 32 and the first: the other end 22 b of the ED F 22. Specifically, the first force bra 42 is connected to the integrated excitation light source 32 via the second force bra 44. The first force bra 42 is connected to the second coupler 44 by the fiber 2. Fino 2 is a separate fiber from the fiber to which the first EDF 22 and the second EDF 24 are connected. The first force bra 42 can be used to connect the first • EDF 22 and the second EDF 24. The first force bra 42 guides the light (first spontaneous emission light L 12) emitted from the other end 22 b of the first EDF 22 only to the one end 24 a of the second EDF 24 and does not guide it to the fiber 2.
- the first force bra 42 guides the first excitation light L 1 incident through the fiber 2 only to the other end 22 b of the first EDF 22 and not to the one end 24 a of the second EDF 24. .
- First power bra 42 For example, WDM power bra.
- the integrated excitation light source 32 emits integrated excitation light.
- the integrated excitation light is incident on the second force bra 44.
- the first excitation light L 1 is incident on the first force bra 42 through the fiber 2.
- the first force bra 42 guides the first excitation light L 1 only to the other end 2 2 b of the first EDF 22.
- the first excitation light L 1 is incident on the first EDF 22.
- Erbium ions contained in the first EDF 22 are excited to a higher energy level by the first excitation light L 1.
- ASE Ambulified Spontaneous Emission
- the AS light is “amplified spontaneous emission light” and is a kind of spontaneous emission light.
- the spontaneous emission light generated in the first EDF 22 is referred to as the first spontaneous emission light L 12.
- the wavelength band of the first spontaneous emission light L 12 is 1.55 m band (C band).
- the first spontaneous emission light L 12 exits from the other end 22 b of the first EDF 22 and is given to the first force bra 42.
- the first force bra 42 guides the first spontaneous emission light L 12 only to one end 24 a of the second EDF 24.
- the second excitation light L 2 is guided only to the other end 24 b of the second EDF 24.
- the second excitation light L 2 is incident on the second EDF 24.
- Erbium ions contained in the second EDF 24 are excited to a higher energy level by the second excitation light L2.
- ASE (Amplified Spontaneous Emission) light is generated when the excited erbium ion transitions to a lower energy level.
- ASE light is “amplified spontaneous emission light” and is a kind of spontaneous emission light.
- the spontaneous emission light generated in the second EDF 24 is referred to as second spontaneous emission light L14.
- the wavelength band of the second spontaneously emitted light L14 is 1.55 ⁇ m band (C band).
- the second spontaneous emission light L 14 is emitted from the other end 24b of the second EDF 24.
- the first spontaneous emission light L 12 is emitted from the other end 22 b of the first EDF 22 and is incident on the first force bra 42.
- the first force bra 42 guides the first spontaneous emission light L 12 only to one end 24 a of the second ED F 24. As a result, the first spontaneous emission light L 12 is incident on the second EDF 24.
- the second EDF 24 converts the incident first spontaneous emission light L 12 into a longer wavelength light L 22 having a longer wavelength and emits it from the other end 24 b.
- the wavelength band of the long wavelength light L 22 is 1.58 zm band (L band).
- a part of the first spontaneous emission light L 12 may be emitted from one end 22 a of the first EDF 22.
- a part of the second spontaneous emission light L 14 may be emitted from one end 24 a of the second EDF 24.
- the light traveling toward the reflection end 12 in this way is reflected by the reflection end 12 and passes through the first EDF 22 and the second EDF 24 to become the long wavelength light L 22.
- the second spontaneous emission light L 14 and the long wavelength light L 22 are emitted from the other end 24 b of the second EDF 24.
- the second spontaneous emission light L 1 4 and the long wavelength light L 2 2 emitted from the other end 2 4 b of the second EDF 2 4 are guided only to the integrated emission means 50 by the second force bra 4 4.
- the integrated emitting means 50 emits the second spontaneous emission light L 14 and the long wavelength light L 2 2 to the outside of the light source device 1.
- a part of the second spontaneous emission light L 14 and the long wavelength light L 22 may be reflected by the output end 50 a and return to the second force bra 44.
- the isolator 52 can prevent such reflected light from returning to the second force bra 44.
- the light source device 1 can emit the second spontaneous emission light L 1 4 (C band) and the long wavelength light L 2 2 (L band) simultaneously.
- FIG. 2 is a diagram showing a configuration of the light source device 1 according to the second embodiment of the present invention.
- the light source device 1 according to the second embodiment includes a reflection end (light reflection means) 1 2, a first EDF (first spontaneous emission light emission means) 2 2, and a second EDF (second spontaneous emission light emission means) 2. 4, Integrated excitation light source 3 2, First force bra (first connection means) 4 2, Second force bra (second connection means) 4 4, Third coupler (third connection means) 4 6, Integrated emission means With 5 0.
- Reflection end (light reflecting means) 12 first EDF (first spontaneous emission light emission means) 22, second EDF (second spontaneous emission light emission means) 24, integrated excitation light source 32 and integrated emission means 50 are This is the same as in the first embodiment, and a description thereof will be omitted.
- the third force bra (third connection means) 46 connects the first force bra 42 and the second force bra 44 to the integrated excitation light source 32. Further, the third force bra 46 guides the integrated excitation light emitted from the integrated excitation light source 32 to the first force bra 42 and the second force bra 44.
- the light guided to the first force bra 42 is the first pump light L 1
- the light guided to the second force bra 44 is the second pump light L 2.
- P 1 the power of the first pumping light L 1
- P 2 the second pumping light L 2
- P 1 P 2
- P 1 P 2
- P 1 3
- the first force bra 42 is connected to the integrated excitation light source 32 via a third force bra 46.
- the first force bra 42 is connected to the third coupler 46 by the fiber 4a.
- the fiber 4a is a fiber different from the fiber to which the first EDF 22 and the second EDF 24 are connected.
- the first force bra 42 guides light (first spontaneous emission light L 12) emitted from the other end 22 b of the first EDF 22 only to one end 24 a of the second EDF 24 and not to the fiber 4 a. . Also, the first force bra 42 is fiber 4a The first excitation light L 1 incident through the first EDF 2 2 is guided only to the other end 2 2 b of the first EDF 2 2, and not to the one end 2 4 a of the second EDF 2 4.
- the first force bra 42 is, for example, a WDM coupler. Since the second force bra 44 is substantially the same as that of the first embodiment, the difference will be described.
- the second force bra 4 4 is connected to the integrated excitation light source 3 2 via the third force bra 4 6.
- the second force bra 4 4 is connected to the third force bra 4 6 by a fiber 4 b.
- the fiber 4b is a different fiber from the fiber to which the first EDF 22 and the second EDF 24 are connected.
- the second force bra 4 4 guides light (second spontaneous emission light L 1 4 and long wavelength light L 2 2) emitted from the other end 2 4 b of the second EDF 2 4 only to the integrated emission means 50. . Do not lead to fiber 4b.
- the second force bra 4 4 guides the second excitation light L 2 incident through the fiber 4 b only to the other end 2 4 b of the second EDF 2 4 and guides it to the integrated output means 50.
- the second force bra 4 4 is, for example, a WDM force bra. Next, the operation of the second embodiment will be described.
- the integrated excitation light source 32 emits integrated excitation light.
- the integrated excitation light is incident on the third force bra 46.
- the integrated pump light is divided into the first pump light L 1 and the second pump light L 2 by the third force bra 46.
- the first excitation light L 1 enters the first force bra 4 2 through the fiber 4 a.
- the first force bra 4 2 guides the first excitation light L 1 only to the other end 2 2 b of the first EDF 2 2. As a result, the first excitation light L 1 is incident on the first EDF 2 2.
- Erbium ions contained in the first EDF 22 are excited to a higher energy level by the first excitation light L 1.
- ASE (Amplified Spontaneous Emission) light is generated when the excited erbium ion transitions to a lower energy level.
- ASE light is “amplified spontaneous emission light” and is a kind of spontaneous emission light.
- the spontaneous emission light generated in the first EDF 22 is referred to as the first spontaneous emission light L 12.
- the wavelength band of the first spontaneous emission light L 1 2 is 1.55 zm band (C band).
- the first spontaneous emission light L 1 2 is emitted from the other end 2 2 b of the first EDF 2 2 and given to the first force bra 4 2.
- the first force bra 4 2 guides the first spontaneous emission light L 1 2 only to one end 2 4 a of the second EDF 2 4.
- the second excitation light L 2 is incident on the second force bra 44 4 through the fiber 4 b.
- the second force bra 4 4 guides the second excitation light L 2 only to the other end 2 4 b of the second EDF 2 4.
- the second excitation light L 2 is incident on the second EDF 24.
- Erbium ions contained in the second EDF 24 are excited to a higher energy level by the second excitation light L 2. Excited Erubiu-ion is, ASE at the time of transition to a lower energy level Ri good (Amplified Spontaneous Emission) light force 5, occurs.
- ASE light is “amplified spontaneous emission light” and is a kind of spontaneous emission light.
- the spontaneous emission light generated in the second EDF 24 is called the second spontaneous emission light L 14.
- the wavelength band of the second spontaneous emission light L 14 is 1.55 m band. (C band).
- the second spontaneous emission light L 14 is emitted from the other end 24 b of the second EDF 24.
- the first spontaneous emission light L 12 is emitted from the other end 22 b of the first ED F 22 and is incident on the first force bra 42.
- the first force bra 42 guides the first spontaneous emission light L 12 only to one end 24 a of the second EDF 24. As a result, the first spontaneous emission light L 1 2 is incident on the second EDF 24.
- the second EDF 24 converts the incident first spontaneous emission light L 1 2 into long wavelength light L 22 having a longer wavelength and emits it from the other end 24 b.
- the wavelength band of the long-wavelength light L 22 is 1.58 ⁇ m band (L band).
- a part of the first spontaneous emission light L 12 may be emitted from one end 22 a of the first EDF 22.
- a part of the second spontaneous emission light L 14 may be emitted from one end 24 a of the second EDF 24.
- the light traveling toward the reflection end 12 is reflected by the reflection end 12 and passes through the first EDF 22 and the second EDF 24 to become the long wavelength light L 2 2.
- the second spontaneous emission light L 14 and the long wavelength light L 22 are emitted from the other end 24 b of the second ED F 24.
- the second spontaneous emission light L 14 and the long wavelength light L 22 emitted from the other end 24 b of the second ED F 24 are guided only to the integrated emission means 50 by the second force bra 44.
- the integrated emitting means 50 emits the second spontaneous emission light L 14 and the long wavelength light L 22 to the outside of the light source device 1.
- Part of the second spontaneous emission light L 14 and the long wavelength light L 22 is reflected by the output end 50 a, and the second force bra 4 May return to 4.
- the iso-ray 52 can prevent such reflected light from returning to the second force bra 44.
- the light source device 1 can emit the second spontaneous emission light L 1 4 (C band) and the long wavelength light L 2 2 (L band) simultaneously.
- the light source device 1 of the third embodiment includes the first excitation light source 3 4 and the second excitation light source 3 6 instead of the integrated excitation light source 3 2.
- FIG. 3 is a diagram showing a configuration of the light source device 1 according to the third embodiment of the present invention.
- the light source device 1 according to the third embodiment includes a reflection end (light reflection means) 1 2, a first EDF (first spontaneous emission light emission means) 2 2, and a second EDF (second spontaneous emission light emission means) 2. 4, first excitation light source 3 4, second excitation light source 3 6, first force bra (first connection means) 4 2, second force bra (second connection means) 4 4, integrated output means 50 Prepare.
- the first excitation light source 34 is a light source that emits the first excitation light L 1 having a wavelength of 980 nm.
- the second excitation light source 36 is a light source that emits second excitation light L 2 having a wavelength of 980 nm.
- the first force bra 42 is connected to the first excitation light source 34 by the fiber 6a.
- the fiber 6 a is a different fiber from the fiber to which the first EDF 22 and the second ED F 24 are connected.
- the first force bra 42 guides light (first spontaneous emission light L 12) emitted from the other end 22 b of the first EDF 22 only to one end 24 a of the second EDF 24 and not to the fiber 6 a. .
- the first coupler 42 guides the first excitation light L 1 incident through the fiber 6 a only to the other end 22 b of the first EDF 22 and does not guide it to the one end 24 a of the second EDF 24.
- the first coupler 42 is, for example, a WDM coupler. Since the second force bra 44 is substantially the same as that of the first embodiment, the differences will be described.
- the second force bra 44 is connected to the second excitation light source 36 by a fiber 6b. Fiber 6b is a separate fiber from the fiber to which the first; ED F 22 and second EDF 24 are connected.
- the second force bra 44 guides light (second spontaneous emission light L 14 and long wavelength light L 22) emitted from the other end 24 b of the second EDF 24 only to the integrated emission means 50.
- the second force bra 44 guides the second excitation light L 2 incident through the fiber 6 b only to the other end 24 b of the second EDF 24 and does not guide the integrated output means 50.
- the second force bra 4 4 is, for example, a WDM force bra.
- the first excitation light source 34 emits the first excitation light L 1.
- the first excitation light L 1 is incident on the first force bra 4 2 through the fiber 6 a.
- the first force bra 4 2 guides the first excitation light L 1 only to the other end 2 2 b of the first EDF 2 2.
- the first excitation light L 1 is incident on the first ED F 2 2.
- Erbium ions contained in the -ED F 2 2 are excited to a high energy level by the first excitation light L 1.
- ASE Amptonified Spontaneous Emission
- the AS light is “amplified spontaneous emission light” and is a kind of spontaneous emission light.
- the spontaneous emission light generated in the first EDF 2 2 is referred to as the first spontaneous emission light L 1 2.
- the wavelength band of the first spontaneous emission light L 1 2 is 1.55 zm band (C band).
- the first spontaneous emission light L 1 2 is emitted from the other end 2 2 b of the first EDF 2 2 and given to the first force bra 4 2.
- the first force bra 4 2 guides the first spontaneous emission light L 1 2 only to one end 2 4 a of the second EDF 2 4.
- the second excitation light source 3 4 emits the second excitation light L 2.
- the second excitation light L 2 is incident on the second force bra 44 through the fiber 6 b.
- the second force bra 4 4 guides the second excitation light L 2 only to the other end 2 4 b of the second EDF 2 4.
- the second excitation light L 2 is incident on the second EDF 24.
- Erbium ions contained in the second EDF 2 4 are excited to a higher energy level by the second excitation light L 2. Excited erbium ions are lower When transitioning to the energy level, ASE (Amplified Spontaneous Emission) light is generated.
- ASE light is “amplified spontaneous emission light” and is a kind of spontaneous emission light.
- the spontaneous emission light generated in the second EDF 24 is referred to as second spontaneous emission light L14.
- the wavelength band of the second spontaneous emission L 14 is 1.55 1.m band (C band).
- the second spontaneous emission light L 14 is emitted from the other end 24 b of the second EDF 24.
- the first spontaneous emission light L 12 is emitted from the other end 22 b of the first EDF 22 and is incident on the first force bra 42.
- the first force bra 42 guides the first spontaneous emission light L 12 only to one end 24 a of the second EDF 24. As a result, the first spontaneous emission light L 12 is incident on the second EDF 24.
- the second EDF 24 converts the incident first spontaneous emission light L 1 2 into long wavelength light L 22 having a longer wavelength and emits it from the other end 24 b.
- the wavelength band of the long-wavelength light L 22 is 1.58 ⁇ m band (L band).
- a part of the first spontaneous emission light L 12 may be emitted from one end 22 a of the first EDF 22.
- a part of the second spontaneous emission light L 14 may be emitted from one end 24 a of the second EDF 24.
- the second spontaneous emission light L 14 and the long wavelength light L 22 are emitted from the other end 24 b of the second EDF 24.
- the second spontaneous emission light L 14 and the long wavelength light L 22 emitted from the other end 24 b of the second EDF 24 are guided only to the integrated emission means 50 by the second force bra 44.
- the integrated emitting means 50 emits the second spontaneous emission light L 14 and the long wavelength light L 2 2 to the outside of the light source device 1.
- a part of the second spontaneous emission light L 14 and the long wavelength light L 22 may be reflected by the output end 50 a and return to the second force bra 44.
- the iso-ray 52 can prevent such reflected light from returning to the second force bra 44.
- the light source device 1 can emit the second spontaneous emission light L 1 4 (C band) and the long wavelength light L 2 2 (L band) simultaneously.
- the embodiments have been described on the assumption that the reflection end 12 is connected to the end 2 2 a of the first EDF 2 2.
- non-reflective means that does not return the light incident from the one end 2 2 a to the one end 2 2 a may be connected to the one end 2 2 a.
- FIG. 4 is a diagram showing the ratio of outgoing light and return light when one end 2 2 a of the first EDF 22 is connected to the open end. Light entering from one end 2 2 a is emitted from the open end 14 to 96%, and 4% returns to the end 2 2 a.
- FIG. 5 is a diagram showing various non-reflective means (isolay 12a, matching jewel 12b, AR coating 12c and slant polished edge 12d).
- Fig. 5 (a) shows an isolat 12a connected to one end 22a.
- FIG. 4% of the light incident from one end 2 2 a is reflected by the open end 14 and attempts to return to the one end 2 2 a, but is blocked by the isolat 1 2 a and no light returns to the one end 2 2 a .
- FIG. 5 is a diagram showing various non-reflective means (isolay 12a, matching jewel 12b, AR coating 12c and slant polished edge 12d).
- Fig. 5 (a) shows an isolat 12a connected to one end 22a.
- FIG. 4% of the light incident from one end 2 2 a is reflected by the open end 14 and attempts to return to the one end 2 2 a, but is blocked by the isolat 1 2 a and no light returns to the one end
- FIG. 5 (b) is a diagram showing a matching jewel 12b applied to one end 22a.
- the matching jewel 1 2 b has the same refractive index as the core Co of the first EDF 2 2. Therefore, the light incident from the one end 2 2 a is diffused by 100% in the matching jewel 12 b and there is no light returning to the one end 22 a.
- FIG. 5 (c) is a diagram showing an AR coating 12c coated on one end 22a.
- AR coating 1 2 c is a non-reflective coating. Therefore, the light incident from the one end 2 2a is emitted 100% through the AR coating 12c, and there is no light returning to the one end 2 2a.
- FIG. 5 (d) is a diagram showing an oblique polishing end 12d provided at the tip of one end 22a.
- the slant polished end 1 2 d is tilted 8 degrees with respect to the first: EDF 2 2 core Co.
- Approximately 4% of the light incident from the one end 2 2 a is reflected by the oblique polishing end 1 2 d and returns to the one end 2 2 a.
- the incident NA number of apertures
- the incident NA is usually 0.1. Therefore, light that enters at an incident angle of tan—O.iO S.? Or more does not enter the core Co but passes through the cladding C 1.
- FIG. 6 is a view showing a reflection reducing means (optical attene 1 2 e). The optical attenae 1 2 e is connected to one end 2 2 a.
- the reflection reducing means is not limited to the optical attainment 1 2 e, and an optical fiber or a very long fiber (which has a large loss due to its long length) can be used as the reflection reducing means.
- one end 2 2a of the first ED F 2 2 may be connected to the open end. Costs can be reduced compared to connecting the reflective end 1 2 or non-reflective means.
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Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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US11/571,190 US20080278939A1 (en) | 2004-06-24 | 2005-06-21 | Light Source Device |
JP2006528649A JPWO2006001405A1 (ja) | 2004-06-24 | 2005-06-21 | 光源装置 |
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JP2004186631 | 2004-06-24 | ||
JP2004-186631 | 2004-06-24 |
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WO2006001405A1 true WO2006001405A1 (ja) | 2006-01-05 |
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PCT/JP2005/011698 WO2006001405A1 (ja) | 2004-06-24 | 2005-06-21 | 光源装置 |
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US (1) | US20080278939A1 (ja) |
JP (1) | JPWO2006001405A1 (ja) |
WO (1) | WO2006001405A1 (ja) |
Cited By (1)
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CN103618201A (zh) * | 2013-12-09 | 2014-03-05 | 北京信息科技大学 | 一种单端泵浦光谱补偿的高平坦c+l波段宽带光源 |
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US11309678B2 (en) * | 2019-10-09 | 2022-04-19 | Molex, Llc | Spectrum and power tunable ASE light source |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000101172A (ja) * | 1998-09-17 | 2000-04-07 | Samsung Electronics Co Ltd | 光ファイバ光源 |
JP2003318468A (ja) * | 2002-02-22 | 2003-11-07 | Kyocera Corp | 広帯域ase光源 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3808632B2 (ja) * | 1998-06-18 | 2006-08-16 | 富士通株式会社 | 光増幅器及び光増幅方法 |
US6982823B2 (en) * | 2002-08-29 | 2006-01-03 | Sumitomo Electric Industries, Ltd. | Wavelength converter |
ATE376272T1 (de) * | 2002-12-10 | 2007-11-15 | Nikon Corp | Ultraviolett-lichtquelle, phototherapievorrichtung mit verwendung einer ultraviolett-lichtquelle und belichtungssystem mit verwendung einer ultraviolett-lichtquelle |
-
2005
- 2005-06-21 WO PCT/JP2005/011698 patent/WO2006001405A1/ja active Application Filing
- 2005-06-21 US US11/571,190 patent/US20080278939A1/en not_active Abandoned
- 2005-06-21 JP JP2006528649A patent/JPWO2006001405A1/ja not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000101172A (ja) * | 1998-09-17 | 2000-04-07 | Samsung Electronics Co Ltd | 光ファイバ光源 |
JP2003318468A (ja) * | 2002-02-22 | 2003-11-07 | Kyocera Corp | 広帯域ase光源 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103618201A (zh) * | 2013-12-09 | 2014-03-05 | 北京信息科技大学 | 一种单端泵浦光谱补偿的高平坦c+l波段宽带光源 |
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JPWO2006001405A1 (ja) | 2008-04-17 |
US20080278939A1 (en) | 2008-11-13 |
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