WO2023007831A1 - ファイバレーザ装置 - Google Patents
ファイバレーザ装置 Download PDFInfo
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- WO2023007831A1 WO2023007831A1 PCT/JP2022/012697 JP2022012697W WO2023007831A1 WO 2023007831 A1 WO2023007831 A1 WO 2023007831A1 JP 2022012697 W JP2022012697 W JP 2022012697W WO 2023007831 A1 WO2023007831 A1 WO 2023007831A1
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- Prior art keywords
- fiber
- housing
- laser device
- optical element
- orientation
- Prior art date
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- 239000000835 fiber Substances 0.000 title claims abstract description 524
- 230000003287 optical effect Effects 0.000 claims abstract description 83
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- 230000005284 excitation Effects 0.000 claims description 15
- 239000000696 magnetic material Substances 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 6
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- 238000012423 maintenance Methods 0.000 description 10
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- 239000004642 Polyimide Substances 0.000 description 2
- 239000002041 carbon nanotube Substances 0.000 description 2
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- 229920001721 polyimide Polymers 0.000 description 2
- 229910052691 Erbium Inorganic materials 0.000 description 1
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- UYAHIZSMUZPPFV-UHFFFAOYSA-N erbium Chemical compound [Er] UYAHIZSMUZPPFV-UHFFFAOYSA-N 0.000 description 1
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Images
Classifications
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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
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/11—Mode locking; Q-switching; Other giant-pulse techniques, e.g. cavity dumping
- H01S3/1106—Mode locking
- H01S3/1112—Passive mode locking
- H01S3/1115—Passive mode locking using intracavity saturable absorbers
- H01S3/1118—Semiconductor saturable absorbers, e.g. semiconductor saturable absorber mirrors [SESAMs]; Solid-state saturable absorbers, e.g. carbon nanotube [CNT] based
-
- 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
- H01S3/06704—Housings; Packages
-
- 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
- H01S3/06791—Fibre ring 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
- H01S3/005—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
- H01S3/0092—Nonlinear frequency conversion, e.g. second harmonic generation [SHG] or sum- or difference-frequency generation outside the laser cavity
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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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
- H01S3/0941—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a laser diode
- H01S3/09415—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a laser diode the pumping beam being parallel to the lasing mode of the pumped medium, e.g. end-pumping
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/14—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range characterised by the material used as the active medium
- H01S3/16—Solid materials
- H01S3/1601—Solid materials characterised by an active (lasing) ion
- H01S3/1603—Solid materials characterised by an active (lasing) ion rare earth
- H01S3/1608—Solid materials characterised by an active (lasing) ion rare earth erbium
Definitions
- the present disclosure relates to fiber laser devices.
- a device comprising a fiber structure (first optical element) containing a saturable absorber and a wavelength division multiplex coupler (second optical element) is known (for example, See Patent Document 1).
- a first fiber connector is provided at the end of a first fiber optically connected to the fiber structure, and a second fiber optically connected to a wavelength division multiplexing coupler.
- a second fiber connector is provided at the end of the.
- the fiber structure and the wavelength division multiplexing coupler are optically connected via a first fiber connector and a second fiber connector.
- the first optical element and the second optical element are usually housed in a housing.
- a problem may arise in that maintenance (observation, cleaning, etc.) of the end face of the second fiber is difficult.
- an object of the present disclosure is to provide a fiber laser device that allows easy maintenance of the end face of the second fiber.
- a fiber laser device includes a housing, a first fiber housed in the housing, and a first fiber connector provided at an end of the first fiber, for oscillation of laser light. and a second optical element for oscillating laser light, which is housed in a housing and has a second fiber and a second fiber connector provided at the end of the second fiber; a movable holder that holds the second fiber connector and is movable to change the orientation of the second fiber connector between a first orientation and a second orientation;
- the two optical elements are optically connectable via a first fiber connector and a second fiber connector, a first opening is formed in the wall of the housing, and the first orientation is the first The orientation of the second fiber connector when the first optical element and the second optical element are optically connected, the second orientation exposing the end face of the second fiber through the first opening. This is the orientation of the second fiber connector.
- the end face of the second fiber is exposed through the first opening by moving the movable holder and changing the direction of the second fiber connector from the first direction to the second direction, for example. be able to.
- the movable holder is provided on the support plate inside the housing, and is arranged between a first direction along the support plate and a second direction perpendicular to the support plate. It may be movable to change the orientation of the two-fiber connector. In this case, the movable holder can be moved to change the orientation of the second fiber connector by 90°, and the orientation of the second fiber connector can be switched between the first orientation and the second orientation.
- the first opening may be formed in a wall facing or adjacent to the movable holder in the housing. In this case, the movable holder can be easily accessed through the first opening.
- the first optical element may include a saturable absorber, an excitation light source, or a wavelength division multiplex coupler.
- a saturable absorber, an excitation light source or a wavelength division multiplex coupler can be used as the first optical element.
- the first optical element may be detachably attached inside the housing.
- the end face of the second fiber can be maintained by removing the first optical element.
- the fiber laser device may further include a locking mechanism that prevents the first optical element from being removed from the housing while the fiber laser device is emitting laser light. .
- a locking mechanism that prevents the first optical element from being removed from the housing while the fiber laser device is emitting laser light.
- the first optical element is housed in the module housing, the second opening is formed in the wall of the housing, and the module housing is , may be removably mounted in the housing via the second opening.
- the first optical element can be modularized, and the modularized first optical element can be attached and detached using the second opening of the housing.
- the module housing is inserted into the second opening from one side of the module housing in the predetermined direction, and the module housing is positioned in the predetermined direction and the One side in the first orthogonal direction may have a different shape than the other side, and the second opening may correspond to the shape of the module housing. This makes it possible to prevent the module housing from being inserted into the second opening with one side and the other side of the first direction reversed.
- the fiber laser device may further include an elastic member that presses the module housing toward the mounting surface on which the module housing is mounted.
- the module housing can be pressed against the mounting surface by the elastic member.
- the fiber laser device further includes a grip portion provided in the module housing, and the grip portion protrudes from the outer surface of the housing while the module housing is attached in the housing.
- a protruding portion may be provided on the outer surface of the housing to cover at least a portion of the periphery of the protruding grip portion. If the grip portion is used (for example, gripped and moved) while the module housing is attached in the housing, the position of the module housing may be displaced.
- the projecting section when the module housing is attached inside the housing, the projecting section makes it difficult to grip the gripping section, thereby reducing the use of the gripping section. This makes it possible to prevent positional displacement of the module housing.
- the end surface of the second fiber when the movable holder is moved so that the orientation of the second fiber connector is the second orientation, the end surface of the second fiber is positioned through the first opening. may be located outside the housing. In this case, maintenance of the end surface of the second fiber can be performed more easily.
- the movable holder is at least partly made of a magnetic material, is provided in the housing, and further includes a holding part made of the magnetic material;
- the movable holder may be held so as to maintain the second orientation by the magnetic force of the holding section.
- the magnetic force can be used to maintain the state where the end surface of the second fiber is exposed through the first opening.
- the fiber laser device may further include a fiber tube fixed near the movable holder within the housing, and the second fiber may pass through the fiber tube. If the second fiber is directly fixed in the vicinity of the movable holder, although the vibration of the second fiber can be suppressed, the second fiber is likely to move greatly along with the movement of the movable holder. This can bend the second fiber and adversely affect performance.
- the vibration of the second fiber can be suppressed, and at the same time the movement of the movable holder can Even if the second fiber moves due to the force, the movement can be allowed and the bending of the second fiber can be suppressed.
- the movable holder may be movably fixed inside the housing. This makes it possible to adjust the position of the movable holder.
- a fiber laser device includes a partition plate that divides the inside of a housing into a first space and a second space, and a fan that pumps air in the first space.
- the two optical elements and the movable holder may be arranged in the second space. In this case, it is possible to prevent dust and the like from adhering to each configuration of the first optical element and the second optical element due to the influence of the air pumped by the fan.
- the fiber laser device may further include an adapter that connects the first fiber connector and the second fiber connector, and an adapter detector that detects the presence or absence of the adapter.
- the adapter can reliably connect the first fiber connector and the second fiber connector.
- the movable holder includes a fixed member that is fixed within the housing, and a second fiber connector that can swing about the swing axis with respect to the fixed member. and a rocking member, and the rocking member may be movable by a predetermined length in a direction along the rocking axis with respect to the fixed member.
- FIG. 1 is a schematic configuration diagram showing a supercontinuum light source according to the first embodiment.
- FIG. 2 is a schematic configuration diagram showing a main part of the supercontinuum light source of FIG.
- FIG. 3 is a schematic configuration diagram showing a state in which the fiber module for the fiber laser device is removed in
- FIG. 4 is a perspective view showing the supercontinuum light source of FIG. 1.
- FIG. 5 is a rear view of the supercontinuum light source of FIG. 1.
- FIG. FIG. 6 is a perspective view showing the supercontinuum light source in FIG. 1 with the housing omitted.
- FIG. 7 is an exploded perspective view showing essential parts of the supercontinuum light source of FIG. 8 is an exploded perspective view of a swing member in the movable holder of FIG. 7.
- FIG. 7 is an exploded perspective view of a swing member in the movable holder of FIG. 7.
- FIG. 9 is a sectional view showing the inside of the module housing of the fiber module for the fiber laser device of FIG. 2.
- FIG. 10 is a perspective view showing the supercontinuum light source in the state of FIG. 3.
- FIG. 11 is a perspective view showing the supercontinuum light source of FIG. 10 with the housing omitted.
- 12 is an enlarged perspective view of the second opening of the supercontinuum light source of FIG. 10.
- FIG. 13 is a perspective view of the supercontinuum light source of FIG. 10 with the second fiber connector in the second orientation by the movable holder;
- FIG. 14 is another perspective view of the supercontinuum light source of FIG. 10 with the second fiber connector in the second orientation by the movable holder;
- FIG. 15 is a perspective view showing a case of observing the supercontinuum light source of FIG. 13 with a fiber scope.
- 16 is a perspective view showing a case where cleaning is performed with a cleaner in the supercontinuum light source of FIG. 13.
- FIG. FIG. 17 is a perspective view showing a movable holder and an adapter detector according to a modification.
- FIG. 18 is another perspective view showing the movable holder and the adapter detector according to the modification.
- FIG. 19 is another perspective view showing the movable holder and the adapter detector according to the modification.
- FIG. 20 is a schematic configuration diagram showing a main part of a supercontinuum light source according to the second embodiment.
- FIG. 21 is a schematic configuration diagram showing a main part of a supercontinuum light source according to the third embodiment.
- FIG. 22 is a perspective view showing a supercontinuum light source according to the fourth embodiment.
- 23 is a perspective view showing a state in which the fiber module for the fiber laser device is removed in FIG. 22.
- FIG. FIG. 24 is a cross-sectional view showing the inside of a module housing of a fiber module for a fiber laser device according to a modification.
- the supercontinuum light source 10 is a light source that generates supercontinuum light.
- the supercontinuum light source 10 constitutes a fiber laser device.
- the supercontinuum light source 10 is a broadband spectrum light source and is used for biological observation and spectroscopic analysis, for example.
- a supercontinuum light source 10 comprises a laser oscillator 5 , a fiber amplifier 20 , a wavelength shifting fiber 30 and a highly nonlinear optical fiber 50 .
- the laser oscillator 5 is a ring-type laser oscillator.
- the output end of laser oscillator 5 is connected to fiber amplifier 20 .
- the output end of fiber amplifier 20 is connected to wavelength shifting fiber 30 .
- An output end of the wavelength shift fiber 30 is connected to a highly nonlinear optical fiber 50 .
- the highly nonlinear optical fiber 50 is a highly nonlinear optical fiber that generates supercontinuum light.
- the highly nonlinear optical fiber 50 expands the spectral width of the input pulsed light by nonlinear optical effects and converts it into supercontinuum light. Supercontinuum light is output from the output end of the highly nonlinear optical fiber 50 .
- Such a supercontinuum light source 10 comprises a pumping light source 11, a wavelength division multiplexing coupler 12, an amplifying fiber 13, an output coupler 14, a fiber structure 15 and a housing 16, as shown in FIGS. .
- Pumping light source 11 , wavelength division multiplexing coupler 12 , amplifying fiber 13 , output coupler 14 and fiber structure 15 are accommodated within housing 16 .
- the pumping light source 11 , the wavelength division multiplexing coupler 12 , the amplifying fiber 13 , the output coupler 14 and the fiber structure 15 constitute optical elements for oscillating laser light, and constitute the laser oscillator 5 .
- the excitation light source 11 is, for example, a laser diode.
- the excitation light source 11 outputs excitation light.
- the excitation light source 11 has a fiber 21 .
- Wavelength division multiplexing coupler 12 has fiber 22 and fiber 29 .
- the wavelength division multiplex coupler 12 reflects pumping light input from the pumping light source 11 via the fiber 21 and outputs the reflected light to the fiber 22 .
- the wavelength division multiplex coupler 12 transmits the laser light input from the fiber 28 of the fiber structure 15 via the fiber 29 and outputs the laser light to the fiber 22 .
- Fiber 29 constitutes a second fiber.
- the amplification fiber 13 absorbs the excitation light input through the fiber 22 and emits laser light.
- the amplification fiber 13 is, for example, an erbium-doped fiber (EDF: Erbium-Doped Fiber) in which the core is doped with erbium (Er).
- EDF Erbium-Doped Fiber
- Output coupler 14 has fibers 23 , 24 and 26 .
- the output coupler 14 divides the laser light input from the amplification fiber 13 via the fiber 23 at a predetermined ratio, outputs a part of the laser light to the fiber 26, and outputs the other part of the laser light to the fiber 24.
- output to The laser light output to the fiber 24 is output to the outside as output light.
- Fiber 26 constitutes a second fiber.
- the fiber structure 15 is a structure with a saturable absorber K.
- the saturable absorber K is a material whose optical transparency changes depending on the incident light intensity.
- the saturable absorber K includes a sheet-shaped resin material and a plurality of carbon nanotubes dispersed in the resin material. A material having excellent heat resistance is used as the resin material. Carbon nanotubes have a saturable absorption characteristic that absorbs light in the 1560 nm band and the absorption decreases when the incident light intensity reaches a high level.
- the fiber structure 15 has fibers 27,28. Fibers 27 and 28 constitute the first fiber.
- the tips of the fibers 27, 28 are butted against each other, and the saturable absorber K is arranged between the tips of the fibers 27, 28.
- the saturable absorber K absorbs the incident light.
- the absorption of the saturable absorber K decreases and the incident light is transmitted through the saturable absorber K. Since the amplitude of the oscillating laser light fluctuates with time at a high frequency due to noise components, light with a high level of incident light intensity is transmitted without being absorbed by the saturable absorber K, and becomes pulsed light.
- the pulsed light is superimposed on the circulating continuous light, stimulating emission is promoted, the intensity is increased, and the saturable absorber K is easily transmitted.
- pulsed light grows and circulates in this way, pulsed light is generated by the saturable absorption characteristics of the saturable absorber K, the fiber nonlinear effect, and the chromatic dispersion effect.
- the fiber structure 15 outputs laser light as pulsed light that has passed through the saturable absorber K to the fiber 29 via the fiber 28 .
- the fiber structure 15 has a first fiber connector 31A provided at the end of the fiber 27 and a first fiber connector 31B provided at the end of the fiber 28.
- the wavelength division multiplexing coupler 12 has a second fiber connector 32B provided at the end of the fiber 29.
- FIG. The output coupler 14 has a second fiber connector 32A at the end of the fiber 26. As shown in FIG.
- the first fiber connector 31A and the second fiber connector 32A can be connected via an adapter 79.
- FIG. The first fiber connector 31B and the second fiber connector 32B can be connected via an adapter 79.
- the fiber structure 15 constituting the first optical element and the output coupler 14 constituting the second optical element can be optically connected via the first fiber connector 31A and the second fiber connector 32A.
- the fiber 27 connected to the fiber structure 15 and the fiber 26 connected to the output coupler 14 can be optically connected.
- the fiber structure 15 constituting the first optical element and the wavelength division multiplexing coupler 12 constituting the second optical element can be optically connected via the first fiber connector 31B and the second fiber connector 32B. is.
- the fiber 28 connected to the fiber structure 15 and the fiber 29 connected to the wavelength division multiplexing coupler 12 can be optically connected.
- the fiber structure 15 is accommodated in a module housing 61 and modularized as a fiber module 60 for a fiber laser device.
- the fiber module 60 (module housing 61 ) for the fiber laser device is detachably attached to the supercontinuum light source 10 .
- a “module” means, for example, one or a plurality of elements (parts and devices) that are functionally or structurally aggregated.
- forward and backward are for convenience based on the illustrated directions.
- vertical direction (“upper” and “lower”) are directions perpendicular to the front-to-rear direction and are for convenience based on the directions shown.
- a direction perpendicular to both the front-rear direction and the up-down direction is also referred to as a “width direction”.
- the housing 16 has a rectangular box shape elongated in the front-rear direction.
- a bracket BR for mounting the supercontinuum light source 10 is fixed to the lower part of the side wall of the housing 16 .
- a first opening 71 is formed in the upper wall 16 a of the housing 16 .
- the upper wall 16a is a wall portion of the housing 16 that faces and is adjacent to a movable holder 76, which will be described later.
- the first opening 71 here is formed in the upper wall 16 a of the housing 16 at a position closer to the center in the front-rear direction. The first opening 71 penetrates vertically so as to communicate the inside and outside of the housing 16 .
- the first opening 71 has a rectangular shape.
- a cover C ⁇ b>0 (see FIG. 12 ) is detachably attached to the first opening 71 so as to close the first opening 71 .
- the first opening 71 is closed by the cover C0.
- a second opening (opening) 72 is formed in the rear wall (wall) 16b of the housing 16.
- the second opening 72 here is formed on the upper side of the rear wall 16 b of the housing 16 .
- the second opening 72 penetrates in the front-rear direction so as to communicate the inside and outside of the housing 16 .
- the second opening 72 has a rectangular shape elongated in the width direction.
- the second opening 72 constitutes an attachment opening through which the fiber laser device fiber module 60 is inserted in the housing 16 .
- the supercontinuum light source 10 includes a first partition (partition plate) 73, a second partition plate (support plate) 74, a fan 75, a fan 75, and a A movable holder 76 , a holding portion 78 and an adapter 79 are provided.
- the first partition plate 73 is a plate-like member that vertically partitions the inside of the housing 16 and is fixed to the housing 16 with screws or the like.
- the first partition plate 73 partitions the inside of the housing 16 into a first space R1 on the lower side and a second space R2 above the first space R1.
- the second partition plate 74 is a plate-like member that vertically partitions the second space R2 inside the housing 16, and is fixed to the housing 16 with screws or the like.
- the second partition plate 74 partitions the second space R2 into a lower second space R21 on the lower side and a second upper space R22 above the second lower space R21.
- the fan 75 pumps the air in the first space R1.
- the fan 75 is fixed to the rear portion of the first space R1 inside the housing 16 .
- the fan 75 pressure-feeds the air sucked from the outside through the intake port H0 forward.
- an axial fan is used as the fan 75.
- the movable holder 76 is arranged inside the housing 16 .
- the movable holder 76 is provided on the second partition plate 74 inside the housing 16 (inside the upper second space R22).
- the movable holder 76 holds the second fiber connectors 32A, 32B and allows the second fiber connectors 32A, 32B to be oriented in a first direction and a second direction. move to change between
- the orientation of the fiber connectors 32A, 32B corresponds, for example, to the optical axis direction of the ends of the fibers 29, 26 to which the fiber connectors 32A, 32B are provided.
- Movable holder 76 can be manually operated by a user, for example.
- the first orientation is when the fiber structure 15 is optically connected to the wavelength division multiplexing coupler 12 and the output coupler 14 (that is, the fiber module 60 for the fiber laser device). are attached).
- the first direction is the direction along the second partition plate 74 .
- the first orientation is rearward.
- the second orientation is the orientation of the second fiber connectors 32A, 32B that expose the end faces of the fibers 29, 26 through the first openings 71.
- the second orientation is the orientation perpendicular to the second partition plate 74 .
- the second orientation is upward.
- To be exposed through the first opening 71 means, for example, to appear from the first opening 71 , to be visible from the first opening 71 , and to be seen or exposed from the first opening 71 .
- the movable holder 76 is moved so that the second fiber connectors 32A and 32B are oriented in the second direction, the end faces of the fibers 29 and 26 are protruded from the first opening 71 and the fibers 29 and 26 are projected outward from the first opening 71. is positioned outside the housing 16 through the first opening 71 .
- the movable holder 76 has a fixed member 81 fixed on the second partition plate 74 inside the housing 16 (see FIG. 4), and a hinge 83 with respect to the fixed member 81. and a swinging member 82 to which it is connected.
- the hinge 83 can swing around a swing axis 83x extending in the width direction on the other hinge plate side with respect to the one hinge plate side.
- the structure of the hinge 83 here is a structure without backlash (minimized).
- the fixing member 81 is a plate-like member.
- the fixing member 81 extends in the width direction while the vertical direction is the thickness direction.
- the fixing member 81 is formed with a long hole 81a elongated in the front-rear direction.
- the fixing member 81 is fixed to the second partition plate 74 with screws through the long holes 81a. That is, the fixing member 81 is fixed so as to be movable in the front-rear direction within the housing 16 .
- One hinge plate side of the hinge 83 is attached to both ends of the fixing member 81 in the width direction.
- the swing member 82 is a member that can swing relative to the fixed member 81 about the swing shaft 83x of the hinge 83.
- the rocking member 82 is provided with second fiber connectors 32A and 32B.
- the swinging member 82 has a base plate 84, a pair of connector mounting portions 85 and a magnetic plate 86. As shown in FIG.
- the base plate 84 is a bent plate-shaped member, and includes a bottom plate 84x, side plates 84y, and an upper plate 84z.
- a pair of bottom plates 84x are provided and have a flat plate shape.
- the other hinge plate side of the hinge 83 is attached to the bottom plate 84x.
- the side plate 84y is provided perpendicular to the bottom plate 84x.
- the side plate 84y has dimensions corresponding to the fixing member 81 in the width direction.
- a pair of rectangular holes 84h through which the second fiber connectors 32A and 32B are inserted are formed in the side plate 84y so as to be spaced apart from each other in the width direction.
- a pair of slits 84s through which a mounting plate 88 (to be described later) is inserted is formed in the side plate 84y so as to be spaced apart from each other in the width direction.
- the rectangular hole 84h and the slit 84s communicate with each other.
- the upper plate 84z is provided perpendicular to the side plate 84y and has a flat plate shape.
- a magnetic plate 86 is fixed to the upper plate 84z.
- the connector mounting portion 85 includes a body portion 87 and a mounting plate 88.
- the main body portion 87 has a block-like outer shape.
- the body portion 87 is fixed to the side plate 84y of the base plate 84 with screws.
- the body portion 87 is formed with a recess 87x into which the second fiber connector 32A is fitted.
- the recess 87x communicates with the rectangular hole 84h of the side plate 84y.
- the body portion 87 is formed with a groove portion 87y through which the fiber 29 is inserted.
- the groove 87y communicates with the recess 87x.
- the mounting plate 88 is fixed to the body portion 87 with screws so as to block the recess 87x and the groove 87y.
- the magnetic plate 86 is fixed to the upper plate 84z of the base plate 84 with screws.
- the magnetic plate 86 is made of a magnetic material. That is, at least a portion of the movable holder 76 is made of a magnetic material.
- the magnetic plate 86 is a member that can be connected to the holding portion 78 by magnetic force.
- the magnetic plate 86 has a plate shape elongated in the width direction.
- the holding portion 78 is provided inside the housing 16 .
- the holding portion 78 is fixed onto the second partition plate 74 via a stay ST.
- the holding portion 78 is made of a magnetic material.
- the holding part 78 can be magnetically connected to the magnetic plate 86 of the movable holder 76 when the movable holder 76 is moved so that the second fiber connectors 32A and 32B are oriented in the second direction ( See Figure 13). Thereby, the movable holder 76 is held by the magnetic force of the holding portion 78 so as to maintain the second orientation.
- the adapter 79 is provided between the first fiber connector 31A and the second fiber connector 32A.
- the first fiber connector 31A is inserted into the adapter 79 so that the first fiber connector 31A and the second fiber connector 32A (that is, the end of the fiber 27 and the end of the fiber 26) are optically connected. and engaged and a second fiber connector 32A is inserted and engaged.
- the adapter 79 is provided between the first fiber connector 31B and the second fiber connector 32B.
- the first fiber connector 31B is inserted into the adapter 79 so that the first fiber connector 31B and the second fiber connector 32B (that is, the end of the fiber 28 and the end of the fiber 29) are optically connected. and engaged and a second fiber connector 32B is inserted and engaged.
- a fiber tube 18 is provided near the movable holder 76 inside the housing 16 .
- the fiber tube 18 is a flexible cylindrical member.
- the fiber tube 18 is fixed on the second partition plate 74 by the tape material 19 .
- Fibers 26 and 29 are passed through the fiber tube 18 .
- a polyimide tape for example, is used as the tape material 19 .
- the supercontinuum light source 10 of this embodiment includes a fiber module 60 for a fiber laser device in which the fiber structure 15 is modularized.
- a fiber module 60 for a fiber laser device includes a module housing 61 , a fiber structure 15 and a grip portion 62 .
- the module housing 61 has a rectangular box shape.
- a module housing 61 houses the fiber structure 15 .
- the fiber structure 15 is arranged in the central part inside the module housing 61 .
- a connector holder 64 is provided at one end of the module housing 61 .
- the connector holding part 64 holds the first fiber connectors 31A, 31B so that the ends of the first fiber connectors 31A, 31B and the fibers 27, 28 protrude from the module housing 61 .
- a rectangular rear plate 63 is fixed to the rear surface of the module housing 61 , and a grip portion 62 is provided on the rear surface of the rear plate 63 .
- the module housing 61 is detachably mounted inside the housing 16 through the second opening 72 .
- the module housing 61 is inserted through the second opening 72 from the front side (one side in the predetermined direction) of the module housing 61 .
- the fibers 27 and 28 are located on the other end side of the module housing 61 (the side where the first fiber connectors 31A and 31B and the ends of the fibers 27 and 28 protrude from the module housing 61). opposite side). Specifically, in the module housing 61 , straight portions of the fibers 27 and 28 that extend linearly are fixed on the other end side of the module housing 61 . The fibers 27 , 28 are fixed at the portion in contact with the inner surface of the module housing 61 . Fixing of the fibers 27 and 28 is realized by applying a tape material 65. FIG. A polyimide tape, for example, is used as the tape material 65 . In the illustrated example, the fibers 27 and 28 are attached to the inner surface of the module housing 61 with a tape material 65 at a plurality of locations separated from each other.
- the grip part 62 is a part that is gripped by the user.
- the grip portion 62 is provided so as to protrude from the outer surface of the rear wall 16 b of the housing 16 when the module housing 61 is mounted inside the housing 16 .
- the grip part 62 is, for example, a U-shaped member when viewed from above and below.
- the grip portion 62 is gripped by inserting a hand from above and below.
- the grip portion 62 extends rearward from one end of the rear plate 63 in the width direction, bends in the width direction, extends along the width direction, and then bends forward to extend along the width direction of the rear plate 63 . reach the end.
- the holding part 62 is held and the module housing 61 is inserted from the second opening 72 of the housing 16 .
- the module housing 61 is placed on the upper surface (mounting surface) of the second partition plate 74, and the module housing 61 is moved forward while sliding the lower surface of the module housing 61 on the upper surface of the second partition plate 74. Then, the rear plate 63 is brought into contact with the rear surface of the housing 16 .
- the first fiber connectors 31A and 31B are inserted into the adapter 79 to optically connect the fiber structure 15 and the wavelength division multiplexing coupler 12 via the first fiber connector 31A and the second fiber connector 32A,
- the fiber structure 15 and the output coupler 14 are optically connected via a first fiber connector 31B and a second fiber connector 32B.
- the rear plate 63 is attached to the housing 16 with screws N. As shown in FIG. Thus, the mounting of the module housing 61 is completed.
- the screw N is removed, the grip portion 62 is gripped, and the lower surface of the module housing 61 is slid onto the upper surface of the second partition plate 74.
- the module housing 61 is moved backward.
- the first fiber connectors 31A and 31B are removed from the adapter 79, and optical connections between the fiber structure 15 and the wavelength division multiplexing coupler 12 and the output coupler 14 are released.
- the module housing 61 is pulled out from the second opening 72 .
- the removal of the module housing 61 is completed.
- the module housing 61 has a different shape on the upper side (one side in the first direction) than on the lower side (the other side in the first direction) when viewed in the front-rear direction (predetermined direction). Specifically, when viewed from the front-rear direction, the module housing 61 has a shape in which the widthwise dimension of the upper end portion is larger than the widthwise dimension of the other portions.
- the second opening 72 corresponds to the shape of the module housing 61 .
- the second opening 72 has a different shape on the upper side than on the lower side when viewed in the front-rear direction. Specifically, when viewed from the front-rear direction, the second opening 72 has a shape in which the widthwise dimension of the upper end portion is larger than the widthwise dimension of the other portions.
- a protrusion 66 that protrudes rearward is provided on the outer surface of the rear wall 16b of the housing 16 below the edge of the second opening 72.
- the protruding portion 66 has a plate shape with a thickness direction extending in the vertical direction.
- Such projecting portion 66 covers at least part of the periphery of gripping portion 62 projecting from the outer surface of rear wall 16 b of housing 16 .
- the projecting portion 66 constitutes a canopy provided below the second opening portion 72 .
- the protruding portion 66 blocks the grip portion 62 from below and prevents a hand from being inserted into the grip portion 62 from above and below.
- the supercontinuum light source 10 includes a module guide 91 and an elastic member 92.
- the module guide 91 is a member that guides the advance and retreat of the module housing 61 entering the housing 16 through the second opening 72 .
- the module guide 91 is fixed to the rear end of the second partition plate 74 .
- the module guide 91 is a gate-shaped member that forms a space along the outer shape of the module housing 61 .
- the module guide 91 is a plate member that is bent into an inverted U shape when viewed from behind.
- the elastic member 92 is, for example, a leaf spring.
- the elastic member 92 presses the upper surface of the module housing 61 entering the housing 16 through the second opening 72 downward toward the upper surface of the second partition plate 74 .
- a pair of elastic members 92 are provided on the upper front side of the module guide 91 and are spaced apart in the width direction.
- the movable holder 76 is moved with the module housing 61 removed from the housing 16 to change the orientation of the second fiber connectors 32A and 32B from rear to upper. .
- the rear side of the swing member 82 is lifted, and the swing member 82 is swung by 90° with respect to the fixed member 81 around the swing shaft 83x of the hinge 83 .
- the state in which the second fiber connectors 32A and 32B extend in the front-rear direction is changed to a state in which the second fiber connectors 32A and 32B stand up in the vertical direction.
- the end faces of the fibers 29 and 26 protrude out from the first opening 71 and are positioned outside the housing 16 through the first opening 71 .
- the magnetic plate 86 of the rocking member 82 is magnetically connected to the holding portion 78 to hold the state of the movable holder 76 in which the second fiber connectors 32A and 32B face upward.
- a fiber scope 95 is installed, and the end faces of the fibers 29 and 26 are observed with the fiber scope 95 to confirm, for example, that the end faces of the fibers 29 and 26 are free of foreign matter and dirt.
- a cleaner 96 cleans the end faces of the fibers 29 and 26 .
- the movable holder 76 is moved to change the direction of the second fiber connectors 32A and 32B from above to behind. Specifically, the magnetic plate 86 and the holding portion 78 are disconnected by magnetic force, the rear side of the swinging member 82 is tilted backward, and the swinging member 83 swings about the swing shaft 83x of the hinge 83 with respect to the fixed member 81. The moving member 82 is swung by 90°. As a result, the state in which the second fiber connectors 32A and 32B stand up in the vertical direction is changed to the state in which the second fiber connectors 32A and 32B extend in the front-rear direction.
- the module housing 61 is attached to the housing 16, and the fiber structure 15 is optically connected to the wavelength division multiplexing coupler 12 and the output coupler 14 via the first fiber connectors 31A, 31B and the second fiber connectors 32A, 32B. . Maintenance is now complete.
- the fibers 29 and 26 can be exposed through the first opening 71 .
- the end faces of the fibers 29,26 can be accessed without pulling out the fibers 29,26. Problems such as disconnection caused by pulling out the fibers 29 and 26 can be avoided.
- the movable holder 76 orients the second fiber connectors 32A, 32B between a first orientation along the second partition plate 74 and a second orientation perpendicular to the second partition plate 74. is movable so that In this case, by moving the movable holder 76 so that the orientations of the second fiber connectors 32A, 32B are changed by 90°, the orientations of the second fiber connectors 32A, 32B are changed between the first orientation and the second orientation. can be switched with
- the first opening 71 is formed in the upper wall 16 a facing and adjacent to the movable holder 76 in the housing 16 .
- the movable holder 76 can be easily accessed through the first opening 71 .
- the fiber structure 15, which constitutes the first optical element contains a saturable absorber K. As shown in FIG. In this case, the saturable absorber K can be used as the first optical element.
- the fiber structure 15 including the saturable absorber K is modularized as a fiber laser device fiber module 60 and detachably mounted in the housing 16. In this case, for example, it is possible to remove the fiber module 60 for the fiber laser device and perform maintenance on the end faces of the fibers 26 and 29 .
- the fiber structure 15 is housed inside the module housing 61 .
- a second opening 72 is formed in the rear wall 16 b of the housing 16 .
- the module housing 61 is detachably mounted inside the housing 16 through the second opening 72 .
- the fiber structure 15 can be modularized, and the modularized fiber structure 15 can be attached and detached using the second opening 72 of the housing 16 .
- the module housing 61 is inserted through the second opening 72 from its front side.
- the module housing 61 presents a shape in which the upper side is different from the lower side when viewed in the front-rear direction.
- the second opening 72 corresponds to the shape of the module housing 61 (a shape in which the upper side is different from the lower side when viewed in the front-rear direction).
- the supercontinuum light source 10 includes an elastic member 92 that presses the module housing 61 toward the upper surface of the second partition plate 74 on which the module housing 61 is placed.
- the elastic member 92 can press the module housing 61 against the upper surface of the second partition plate 74 .
- the supercontinuum light source 10 has a grip portion 62 provided on a module housing 61 .
- the grip portion 62 is provided so as to protrude from the outer surface of the rear wall 16 b of the housing 16 when the module housing 61 is mounted inside the housing 16 .
- a projecting portion 66 covering the lower portion of the projecting grip portion 62 is provided on the outer surface of the rear wall 16 b of the housing 16 . If the gripping portion 62 is used (for example, gripped and moved) while the module housing 61 is attached inside the housing 16 , there is a possibility that the module housing 61 will be displaced. As a result, the characteristics of the supercontinuum light source 10 may change and malfunction.
- the projecting section 66 makes it difficult to grasp the gripping section 62 , thereby reducing the use of the gripping section 62 . This makes it possible to prevent the positional displacement of the module housing 61 .
- the end faces of the fibers 26 and 29 pass through the first opening 71. Located outside the housing 16 . In this case, maintenance of the end faces of the fibers 26 and 29 can be performed more easily.
- the movable holder 76 includes a magnetic plate 86 made of magnetic material.
- a holding portion 78 made of a magnetic material is provided in the housing 16 .
- the supercontinuum light source 10 comprises a fiber tube 18 fixed near a movable holder 76 within the housing 16 . Fibers 26 and 29 pass through fiber tube 18 . If the fibers 26 and 29 are directly fixed in the vicinity of the movable holder 76, the vibration of the fibers 26 and 29 can be suppressed, but the fibers 26 and 29 move greatly as the movable holder 76 moves. The movement can bend the fibers 26, 29 and adversely affect performance (eg, mode-locking can be affected).
- the vibration of the fibers 26 and 29 can be suppressed and the movable holder Even if the fibers 26 and 29 move together with the movement of 76, the movement can be allowed and the bending of the fibers 26 and 29 can be suppressed.
- the movable holder 76 is fixed to the second partition plate 74 through the elongated hole 81a (see FIG. 7), and is fixed inside the housing 16 so as to be movable in the front-rear direction. This enables adjustment of the position of the movable holder 76 in the front-rear direction.
- the movable holder 76 may be fixed so as to be movable in directions other than the front-rear direction. It becomes possible.
- the supercontinuum light source 10 includes a first partition plate 73 that divides the inside of the housing 16 into a first space R1 and a second space R2, and a fan 75 that pumps the air in the first space R1.
- the fiber structure 15, the wavelength division multiplexing coupler 12 and the output coupler 14 are arranged in the second space R2.
- the air pumped by the fan 75 should prevent dust from adhering to each structure of the fiber structure 15, the wavelength division multiplexing coupler 12 and the output coupler 14 (for example, the end faces of the fibers 26 and 29). can be done. It is possible to provide an isolation structure in which the portion where each configuration of the fiber structure 15, the wavelength division multiplexing coupler 12 and the output coupler 14 is arranged and the portion cooled by the fan 75 are separated.
- the supercontinuum light source 10 includes an adapter 79 that connects the first fiber connectors 31A, 31B and the second fiber connectors 32A, 32B.
- the adapter 79 can reliably connect the first fiber connectors 31A, 31B and the second fiber connectors 32A, 32B.
- the fiber structure 15 that constitutes the first optical element can be modularized, and the modularized fiber structure 15 can be inserted into the second aperture of the housing 16 . It is possible to attach and detach using the portion 72 . Therefore, it is possible to easily replace the fiber structure 15 . It becomes possible to modularize the fiber structure 15 (saturable absorber K) and replace it easily.
- the fiber structure 15 contains a saturable absorber K.
- the saturable absorber K can be used as the first optical element. Since the saturable absorber K needs to be replaced due to its service life, the effect of facilitating replacement is particularly effective.
- the fiber module 60 for a fiber laser device when optically connecting the fiber structure 15 to the wavelength division multiplexing coupler 12 and the output coupler 14 via the first fiber connectors 31A and 31B, for example, the first fiber connectors 31A and 31B Due to the play, the first fiber connectors 31A, 31B move and the ends of the fibers 27, 28 move in response to the movement of the first fiber connectors 31A, 31B, which can adversely affect performance.
- the fibers 27 and 28 are fixed to the module housing 61 in the fiber module 60 for the fiber laser device, movement of the fibers 27 and 28 can be suppressed.
- the fiber length from the ends of the fibers 27 and 28 to the fixing point is Due to the short length, movement of the first fiber connectors 31A, 31B and the ends of the fibers 27, 28 tends to cause the fibers 27, 28 to be largely displaced, which in turn tends to bend the fibers 27, 28, which may adversely affect the performance. be.
- the fibers 27 and 28 are fixed on the other end side (the side far from the first fiber connectors 31A and 31B) in the module housing 61, so that the fibers 27 and 28
- the fiber length increases from the end to the fixing point. Therefore, it is possible to prevent the fibers 27 and 28 from bending due to the movement of the first fiber connectors 31A and 31B and the ends of the fibers 27 and 28 . Therefore, it is possible to suppress adverse effects on performance.
- the linear portions of the fibers 27 and 28 extending linearly are fixed on the other end side inside the module housing 61 . In this case, bending of the fibers 27 and 28 can be further suppressed.
- the supercontinuum light source 10 includes a pair of movable holders 180 instead of the movable holders 76 (FIG. 4), and further includes an adapter detector 140.
- a pair of movable holders 180 are provided corresponding to each of the second fiber connectors 32A and 32B.
- a pair of movable holders 180 are independently movable.
- One movable holder 180 holds the second fiber connector 32B and moves to change the orientation of the second fiber connector 32B between a first orientation and a second orientation.
- the other movable holder 180 holds the second fiber connector 32A and moves to change the orientation of the second fiber connector 32A between a first orientation and a second orientation.
- One movable holder 180 includes a fixed member 181 and a swing member 185 connected to the fixed member 181 via a hinge 83 .
- the fixing member 181 is fixed on the second partition plate 74 .
- One hinge plate side of the hinge 83 is fixed to the fixing member 181 .
- the swing member 185 is a member that can swing with respect to the fixed member 81 .
- the other hinge plate side of the hinge 83 is fixed to the swing member 185 .
- the rocking member 185 has a block-like outer shape.
- a swing member 185 holds the second fiber connector 32B.
- a magnetic plate 186 is fixed to the upper surface of the swing member 185 .
- the magnetic plate 186 is constructed in the same manner as the magnetic plate 86 (see FIG. 7).
- the magnetic plate 186 can be magnetically coupled to the holding portion 178 included in the fixing member 181 .
- the holding portion 178 is configured in the same manner as the holding portion 78 (see FIG. 7).
- one hinge plate side and the other hinge plate side are movable by a predetermined length.
- the swing member 185 is configured to be movable by a predetermined length in the direction along the swing shaft 83x with respect to the fixed member 181 .
- the predetermined length may be a length corresponding to play between one hinge plate side and the other hinge plate side of the hinge 83, and may be, for example, 1 to 2 mm. Since the other movable holder 180 has the same configuration as the one movable holder 180, the description thereof is omitted.
- the adapter detection unit 140 includes a hinge 141 and a tilting plate 142.
- the hinge 141 tilts the tilt plate 142 around a swing axis 141x along the width direction.
- the hinge plate 141 A side which is the fixed side of the hinge 141 , is fixed on the second partition plate 74 .
- a hinge plate 141B side which is the movable side of the hinge 141, is fixed to a later-described flat plate portion 142x of the tilting plate 142. As shown in FIG. In the hinge 141 here, a force acts to pull the hinge plate 141B on the movable side downward.
- the tilting plate 142 has a flat plate portion 142x and a bent portion 142y that is continuous with the rear end of the flat plate portion 142x so as to protrude upward.
- such an adapter detector 140 is such that when the movable holder 180 is moved so that the second fiber connector 32A is oriented in the second direction, the adapter 79 is separated from the bent portion 142y. .
- the hinge plate 141A of the hinge 141 is pulled downward, the tilting plate 142 is tilted so that the front side is positioned downward with respect to the rear side, and the bent portion 142y is raised.
- the adapter 79 comes into contact with the bent portion 142y, and the bent portion 142y moves downward. Being pressed, the tilting plate 142 maintains the state along the horizontal plane. The presence of the adapter 79 can be detected by detecting the state of the tilting plate 142 .
- the bending portion 142y cannot be pressed downward, so the tilting plate 142 maintains the tilted state.
- the presence of the adapter 79 can be detected by detecting the state of the tilting plate 142 .
- the first fiber connector 31A of the fiber module 60 for the fiber laser device is brought into contact with the bent portion 142y to restrict the forward movement of the module housing 61 so that the module housing 61 is not completely inserted forward. can be done.
- An interlock mechanism (not shown) is activated while the forward movement of the module housing 61 is restricted.
- the modifications shown in FIGS. In this case, it is possible to prevent forgetting to attach the adapter 79 based on the detection result of the adapter detection unit 140 . Also, the interlock mechanism can be operated when the adapter 79 is not attached. This prevents the laser light from being emitted from the fiber module 60 for a fiber laser device when the adapter 79 is not attached. Malfunctions when the adapter 79 is not attached can be prevented, and safety can be improved.
- the swinging member 185 can move by a predetermined length relative to the fixed member 181 in the direction along the swinging axis 83x.
- the first fiber connectors 31A and 31B are aligned with the swing axis 83x with respect to the second fiber connectors 32A and 32B. Even if there is a deviation in the direction along, it is possible to move the second fiber connectors 32A and 32B (fiber module 60 for a fiber laser device) so as to eliminate the deviation.
- By providing play to the hinge 83 even if there is a positional deviation between the first fiber connectors 31A, 31B and the second fiber connectors 32A, 32B, they can be inserted into the adapter 79 by fitting them together.
- the wavelength division multiplexing coupler 12 is modularized as a fiber module 160 for a fiber laser device. It differs from the continuum light source 10 (see FIG. 2).
- the wavelength division multiplex coupler 12 has fibers 121, 29 and 122 and fiber connectors 33A, 33B and 33C provided at the ends of the fibers 121, 29 and 122.
- the excitation light source 11 has a fiber 21 and a fiber connector 34A provided at the end of the fiber 21 .
- the amplification fiber 13 has a fiber 22 and a fiber connector 35C provided at the end of the fiber 22 .
- the fiber connectors 34A, 33A are connectable, the fiber connectors 31B, 33B are connectable, and the fiber connectors 35C, 33C are connectable.
- the wavelength division multiplexing coupler 12 forming the first optical element and the fiber structure 15 forming the second optical element can be optically connected via the fiber connectors 33B and 31B.
- the wavelength division multiplexing coupler 12 forming the first optical element and the excitation light source 11 forming the second optical element can be optically connected via fiber connectors 33A and 34A.
- the wavelength division multiplexing coupler 12 forming the first optical element and the amplification fiber 13 forming the second optical element can be optically connected via fiber connectors 33C and 35C.
- the fiber connectors 33A, 33B, 33C constitute a first fiber connector
- the fiber connectors 31B, 34A, 35C constitute a second fiber connector.
- the supercontinuum light source 110 and the fiber module 160 for a fiber laser device also have the same effect as the above embodiment.
- the supercontinuum light source 210 according to the third embodiment is similar to the supercontinuum light source 210 according to the first embodiment in that the excitation light source 11 is modularized as a fiber module 260 for a fiber laser device. It differs from the light source 10 (see FIG. 2).
- the excitation light source 11 has a fiber 21 and a fiber connector 34A provided at the end of the fiber 21 .
- the wavelength division multiplex coupler 12 has a fiber 121 and a fiber connector 33 A provided at the end of the fiber 121 .
- the fiber connectors 34A, 33A are connectable. That is, the excitation light source 11 forming the first optical element and the wavelength division multiplexing coupler 12 forming the second optical element can be optically connected via fiber connectors 34A and 33A.
- the fiber module 260 for fiber laser device has a substrate 211 on which the excitation light source 11 is mounted.
- the fiber connector 34A constitutes a first fiber connector
- the fiber connector 33A constitutes a second fiber connector.
- the supercontinuum light source 210 and the fiber module 260 for a fiber laser device also have the same effect as the above embodiment.
- one aspect of the present disclosure is not limited to the above embodiments, and may be modified or applied to other things within the scope of not changing the gist described in each claim.
- the module housing 61 is detachably mounted inside the housing 16 through the second opening 72, but it is not limited to this.
- the module housing 361 (fiber module 360 for fiber laser device) is detachably attached to the housing 16 via the first opening 371. There may be.
- the module housing 361 corresponds to the module housing 61 (see FIG. 10).
- the first opening 371 corresponds to the first opening 71 (see FIG. 10).
- the first opening 371 has a size that allows the module housing 61 to come out of the housing 16 through the first opening 371 without contacting the housing 16 when the movable holder 76 is moved.
- the length from the rear edge of the first opening 371 to the movable holder 76 is greater than the dimension of the module housing 61 in the front-rear direction.
- the housing 16 does not have the second opening 72 (see FIG. 10).
- the movable holder 76 is swung by 90° to project the module housing 361 from the first opening 371 and the second fiber connector 32A. , 32B face upward (the first fiber connectors 31A and 32A face downward).
- the adapter 79 By removing the adapter 79 in this state, the module housing 361 can be removed from the housing 16 .
- a fiber module 460 having an isolator 415 is provided as shown in FIG. may
- the isolator 415 includes a saturable absorber K.
- the first optical element, the second optical element and the optical element are not particularly limited, and may be various optical elements.
- the first openings 71 and 371 are formed in the upper wall 16a facing and adjacent to the movable holder 76 in the housing 16.
- a first opening 71, 371 may be formed in the portion.
- the upper side of the module housing 61 has a different shape from the lower side when viewed in the front-rear direction.
- the present invention is not limited to this. It may be said that In short, the module housing 61 may have a different shape on one side in the first direction perpendicular to the front-rear direction than on the other side when viewed from the front-rear direction.
- the projecting portion 66 covering the lower portion of the grip portion 62 is provided on the outer surface of the housing 16, but the projecting portion 66 may cover at least a portion of the periphery of the projecting grip portion 62.
- the first fiber connector 31A and the second fiber connector 32A are connected via the adapter 79, but the adapter 79 may be omitted in some cases.
- the movable holder 76 projects the end surfaces of the fibers 29 and 26 out of the first opening 71 when the second fiber connectors 32A and 32B are moved to the second orientation. , the end surfaces of the fibers 29 and 26 are positioned outside the housing 16 through the first opening 71, but the present invention is not limited to this.
- the movable holder 76 is moved so that the second fiber connectors 32A and 32B are oriented in the second direction, if the end surfaces of the fibers 29 and 26 are exposed from the first opening 71, the housing 16 The end faces of the fibers 29, 26 may be located within.
- the interlock mechanism when the screws N (see FIG. 10) for attaching the module housings 61 and 361 to the housing 16 are not tightened, the interlock mechanism is operated to emit laser light from the fiber module 60 for a fiber laser device. You may prevent it from being done.
- the fiber modules 60, 160, 260, 360, and 460 (first optical elements) for fiber laser devices
- a lock mechanism may be further provided to prevent the device from being removed from the housing 16 .
- the lock mechanism is a safety mechanism that prevents removal of the fiber modules 60, 160, 260, 360, and 460 for the fiber laser device when the supercontinuum light sources 10, 110, 210, and 310 are in operation (for example, when the power is turned on). be.
- the lock mechanism is a mechanism using a solenoid, appears when the supercontinuum light sources 10, 110, 210, 310 are activated, engages the module housings 61, 361, and A detachment prevention pin that is buried to release the engagement when 110, 210, 310 are not in operation may be used.
- the second fiber connectors 32A and 32B may be held by a non-movable normal holder instead of the movable holder 76.
- the first optical element is housed in the module housing 61, 361 to form a module as the fiber module 60, 160, 260, 360, 460 for the fiber laser device. No need to modularize.
- each configuration in the above-described embodiments and modifications can be arbitrarily applied to each configuration in another embodiment or modification.
- One aspect of the present disclosure can also be viewed as a supercontinuum light source.
- Fiber connector (first fiber connector), 34A... fiber connector (first fiber connector, second fiber connector), 35C... fiber connector (second fiber connector) , 60, 160, 260, 360, 460... Fiber module for fiber laser device 61, 361... Module housing 62... Holding part 66... Protruding part 71, 371... First opening 72... Second opening Part (opening), 73... First partition (partition plate), 74... Second partition (support plate), 75... Fan, 76... Movable holder, 78... Holding part, 79... Adapter, 81, 181 Fixed member 82, 185 Swing member 83x Swing shaft 92 Elastic member 140 Adapter detector 415 Isolator (first optical element, second optical element, optical element), K ... saturable absorber, R1 ... first space, R2 ... second space.
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Abstract
Description
る。
図1に示されるように、スーパーコンティニューム光源10は、スーパーコンティニューム光を生成する光源である。スーパーコンティニューム光源10は、ファイバレーザ装置を構成する。スーパーコンティニューム光源10は、広帯域スペクトル光源であり、例えば生体観察及び分光分析に用いられる。スーパーコンティニューム光源10は、レーザ発振器5、ファイバ増幅器20、波長シフトファイバ30及び高非線形光ファイバ50を具備する。
図20に示されるように、第2実施形態に係るスーパーコンティニューム光源110は、波長分割多重カプラ12がファイバレーザ装置用ファイバモジュール160としてモジュール化されている点で、第1実施形態に係るスーパーコンティニューム光源10(図2参照)と異なる。
図21に示されるように、第3実施形態に係るスーパーコンティニューム光源210は、励起光源11がファイバレーザ装置用ファイバモジュール260としてモジュール化されている点で、第1実施形態に係るスーパーコンティニューム光源10(図2参照)と異なる。
Claims (17)
- 筐体と、
前記筐体内に収容され、第1ファイバ及び前記第1ファイバの端部に設けられた第1ファイバコネクタを有し、レーザ光の発振のための第1の光学要素と、
前記筐体内に収容され、第2ファイバ及び前記第2ファイバの端部に設けられた第2ファイバコネクタを有し、前記レーザ光の発振のための第2の光学要素と、
前記第2ファイバコネクタを保持すると共に、前記第2ファイバコネクタの向きが第1の向きと第2の向きとの間で変化するように可動する可動式ホルダーと、を備え、
前記第1の光学要素と前記第2の光学要素とは、前記第1ファイバコネクタ及び前記第2ファイバコネクタを介して光学的に接続可能であり、
前記筐体の壁部には、第1開口部が形成され、
前記第1の向きは、前記第1の光学要素と前記第2の光学要素とが光学的に接続されるときの前記第2ファイバコネクタの向きであり、
前記第2の向きは、前記第2ファイバの端面を前記第1開口部を介して露出させる前記第2ファイバコネクタの向きである、ファイバレーザ装置。 - 前記可動式ホルダーは、前記筐体内の支持板上に設けられ、前記支持板に沿う前記第1の向きと前記支持板に垂直な前記第2の向きとの間で前記第2ファイバコネクタの向きが変化するように可動する、請求項1に記載のファイバレーザ装置。
- 前記第1開口部は、前記筐体において前記可動式ホルダーに対向又は隣接する壁部に形成されている、請求項1又は2に記載のファイバレーザ装置。
- 前記第1の光学要素は、可飽和吸収体、励起光源又は波長分割多重カプラを含む、請求項1~3の何れか一項に記載のファイバレーザ装置。
- 前記第1の光学要素は、着脱可能に前記筐体内に取り付けられる、請求項1~4の何れか一項に記載のファイバレーザ装置。
- 前記ファイバレーザ装置で前記レーザ光を発振している場合に、前記第1の光学要素が前記筐体内から取り外されることを阻止するロック機構を更に備える、請求項5に記載のファイバレーザ装置。
- 前記第1の光学要素の少なくとも一部は、モジュール筐体内に収容され、
前記筐体の壁部には、第2開口部が形成され、
前記モジュール筐体は、前記第2開口部を介して着脱可能に前記筐体内に取り付けられる、請求項5又は6に記載のファイバレーザ装置。 - 前記モジュール筐体は、当該モジュール筐体の所定方向の一方側から前記第2開口部へ挿通され、
前記モジュール筐体は、前記所定方向から見て、前記所定方向と直交する第1方向の一方側が他方側と異なる形状を呈し、
前記第2開口部は、前記モジュール筐体の当該形状に対応する、請求項7に記載のファイバレーザ装置。 - 前記モジュール筐体を載置する載置面に向けて前記モジュール筐体を押圧する弾性部材を更に備える、請求項7又は8に記載のファイバレーザ装置。
- 前記モジュール筐体に設けられた把持部を更に備え、
前記把持部は、前記モジュール筐体が前記筐体内に取り付けられた状態で、前記筐体の外面から突き出るように設けられ、
前記筐体の外面には、突き出る前記把持部の周囲の少なくとも一部を覆う突出部が設けられている、請求項7~9の何れか一項に記載のファイバレーザ装置。 - 前記第2ファイバコネクタの向きが前記第2の向きとなるように前記可動式ホルダーを可動させた場合において、前記第2ファイバの端面は、前記第1開口部を介して前記筐体外に位置する、請求項1~10の何れか一項に記載のファイバレーザ装置。
- 前記可動式ホルダーは、その少なくとも一部が磁性材料で形成されており、
前記筐体内に設けられ、磁性材料で形成された保持部を更に備え、
前記第2ファイバコネクタの向きが前記第2の向きとなるように前記可動式ホルダーを可動させた場合において、前記可動式ホルダーは、前記保持部の磁力により、当該第2の向きを維持するように保持される、請求項1~11の何れか一項に記載のファイバレーザ装置。 - 前記筐体内における前記可動式ホルダーの付近に固定されたファイバチューブを更に備え、
前記第2ファイバは、前記ファイバチューブを挿通する、請求項1~12の何れか一項に記載のファイバレーザ装置。 - 前記可動式ホルダーは、前記筐体内に移動可能に固定されている、請求項1~13の何れか一項に記載のファイバレーザ装置。
- 前記筐体内を第1空間と第2空間とに仕切り板と、
前記第1空間内のエアを圧送するファンと、を備え、
前記第1の光学要素、前記第2の光学要素及び前記可動式ホルダーは、前記第2空間内に配置されている、請求項1~14の何れか一項に記載のファイバレーザ装置。 - 前記第1ファイバコネクタと前記第2ファイバコネクタとを接続するアダプタと、
前記アダプタの有無を検知するアダプタ検知部と、を更に備える、請求項1~15の何れか一項に記載のファイバレーザ装置。 - 前記可動式ホルダーは、前記筐体内に固定される固定部材と、前記固定部材に対して揺動軸を中心に揺動可能で且つ前記第2ファイバコネクタが設けられた揺動部材と、を含み、
前記揺動部材は、前記固定部材に対して、前記揺動軸に沿う方向に所定長移動可能である、請求項1~16の何れか一項に記載のファイバレーザ装置。
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JP2004125711A (ja) * | 2002-10-04 | 2004-04-22 | Furukawa Electric Co Ltd:The | 光コネクタの接続状態判定方法及び励起光源 |
JP2004214325A (ja) * | 2002-12-27 | 2004-07-29 | Toshiba Corp | 光ファイバ放熱装置およびその製造方法 |
JP2014223642A (ja) * | 2013-05-16 | 2014-12-04 | 株式会社アマダミヤチ | 光ファイバ伝送方式のレーザ加工装置、レーザ出射ユニット及び光ファイバ脱着方法 |
JP2017067804A (ja) | 2015-09-28 | 2017-04-06 | 国立大学法人名古屋大学 | スーパーコンティニュアム光源 |
JP2017168773A (ja) * | 2016-03-18 | 2017-09-21 | 浜松ホトニクス株式会社 | レーザ発振器及びレーザ加工装置 |
JP2021044279A (ja) * | 2019-09-06 | 2021-03-18 | 株式会社アマダ | ファイバレーザ発振器及びファイバレーザ発振器のメンテナンスシステム |
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JP2004125711A (ja) * | 2002-10-04 | 2004-04-22 | Furukawa Electric Co Ltd:The | 光コネクタの接続状態判定方法及び励起光源 |
JP2004214325A (ja) * | 2002-12-27 | 2004-07-29 | Toshiba Corp | 光ファイバ放熱装置およびその製造方法 |
JP2014223642A (ja) * | 2013-05-16 | 2014-12-04 | 株式会社アマダミヤチ | 光ファイバ伝送方式のレーザ加工装置、レーザ出射ユニット及び光ファイバ脱着方法 |
JP2017067804A (ja) | 2015-09-28 | 2017-04-06 | 国立大学法人名古屋大学 | スーパーコンティニュアム光源 |
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JP2021044279A (ja) * | 2019-09-06 | 2021-03-18 | 株式会社アマダ | ファイバレーザ発振器及びファイバレーザ発振器のメンテナンスシステム |
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