CN118299902A - Visible light laser with optical fiber output - Google Patents
Visible light laser with optical fiber output Download PDFInfo
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- CN118299902A CN118299902A CN202410460738.XA CN202410460738A CN118299902A CN 118299902 A CN118299902 A CN 118299902A CN 202410460738 A CN202410460738 A CN 202410460738A CN 118299902 A CN118299902 A CN 118299902A
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 67
- 230000008878 coupling Effects 0.000 claims abstract description 18
- 238000010168 coupling process Methods 0.000 claims abstract description 18
- 238000005859 coupling reaction Methods 0.000 claims abstract description 18
- 230000001105 regulatory effect Effects 0.000 claims abstract description 15
- 230000003287 optical effect Effects 0.000 claims abstract description 14
- 230000008859 change Effects 0.000 claims abstract description 8
- 239000013078 crystal Substances 0.000 claims description 44
- 239000000835 fiber Substances 0.000 claims description 21
- 230000010287 polarization Effects 0.000 claims description 9
- GQYHUHYESMUTHG-UHFFFAOYSA-N lithium niobate Chemical compound [Li+].[O-][Nb](=O)=O GQYHUHYESMUTHG-UHFFFAOYSA-N 0.000 claims description 4
- WSMQKESQZFQMFW-UHFFFAOYSA-N 5-methyl-pyrazole-3-carboxylic acid Chemical compound CC1=CC(C(O)=O)=NN1 WSMQKESQZFQMFW-UHFFFAOYSA-N 0.000 claims description 3
- WYOHGPUPVHHUGO-UHFFFAOYSA-K potassium;oxygen(2-);titanium(4+);phosphate Chemical compound [O-2].[K+].[Ti+4].[O-]P([O-])([O-])=O WYOHGPUPVHHUGO-UHFFFAOYSA-K 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 5
- 239000010408 film Substances 0.000 description 21
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- 229910052594 sapphire Inorganic materials 0.000 description 1
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- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
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Abstract
The invention discloses a visible light laser with optical fiber output, which comprises a fundamental frequency light source, a frequency doubling component, a light spot compensation component and an optical fiber output component; the flare compensation component comprises at least one first lens and a position adjustment unit; the fundamental frequency light source is used for outputting fundamental frequency laser, the fundamental frequency laser is incident to the frequency multiplication component to generate frequency multiplication laser, the frequency multiplication laser is incident to the light spot compensation component, the light spot of the frequency multiplication laser is regulated by the light spot compensation component and then coupled to the optical fiber output component, and the optical fiber output component is used for outputting the frequency multiplication laser; the adjusting unit is used for adjusting the position of the first lens in the direction parallel to the first direction so as to change the beam waist of the frequency doubling laser; the first direction is the optical axis direction of the first lens. The optical fiber output visible light laser provided by the invention can compensate thermal lens effects under different powers through adjusting frequency multiplication laser, and stable optical fiber coupling output with high efficiency and high power is generated.
Description
Technical Field
The invention relates to the technical field of visible light lasers, in particular to a visible light laser with optical fiber output.
Background
The visible light laser mainly has the schemes of direct output of a semiconductor, frequency multiplication of a solid laser, frequency multiplication of an optical fiber laser and the like. The fiber laser frequency doubling laser has the advantages of simple structure, narrow line width, good beam quality and the like, and has wide application prospect in the fields of atomic cooling, nonlinear optical research, titanium sapphire pumping and the like.
The single-frequency fiber laser has the advantages of linear polarization, single frequency, single transverse mode and the like, in order to maintain the single-mode linear polarization characteristic, the coupling fiber needs to be a single-mode polarization maintaining fiber, such as PM460-HP fiber, but the fiber core of the coupling fiber is small (the diameter is 3 mu m), and the requirements on the adjustment and stability of coupling are extremely high; after the visible light is required to be output in a frequency doubling mode, the visible light is collimated and focused to the center of a fiber core of the optical fiber through a coupling lens group, and the divergence angle and the beam waist diameter of a focal point of the end face of the optical fiber can be matched with the mode of the optical fiber, but the periodic polarized crystal linearly absorbs fundamental frequency light and frequency doubling light, so that a thermal lens effect can be generated at high power, the light spot mode of the coupling end face of the optical fiber changes, and the coupling efficiency of the optical fiber is reduced.
The existing single-frequency visible light optical fiber frequency doubling scheme mainly comprises resonance frequency doubling and single-pass frequency doubling based on periodic polarized crystals, wherein most of the frequency doubling scheme is direct space collimation output, optical fiber coupling is rarely performed, the frequency doubling scheme is inconvenient to use, and the frequency doubling device for optical fiber coupling output commercially available in the market has the defects of low output power, unstable power and the like.
Disclosure of Invention
The invention provides a visible light laser output by an optical fiber, which outputs visible light of a space after frequency multiplication based on fundamental frequency laser output by a fundamental frequency light source, and the different positions of a lens are regulated by a position regulating unit to match light beams required by optical fiber couplers under different powers.
According to a first aspect of the present invention, there is provided an optical fiber output visible light laser, including a fundamental frequency light source, a frequency doubling component, a flare compensation component and an optical fiber output component; the flare compensation component comprises at least one first lens and a position adjustment unit;
The fundamental frequency light source is used for outputting fundamental frequency laser, the fundamental frequency laser is incident to the frequency multiplication component to generate frequency multiplication laser, the frequency multiplication laser is incident to the facula compensation component, the facula compensation component adjusts the facula of the frequency multiplication laser and then is coupled to the optical fiber output component, and the optical fiber output component is used for outputting the frequency multiplication laser;
Wherein the position adjusting unit is used for adjusting the position of the first lens in a direction parallel to a first direction so as to change the beam waist of the frequency doubling laser; the first direction is an optical axis direction of the first lens.
Optionally, the flare compensation component further comprises a second lens and a third lens;
The frequency multiplication laser is regulated by the first lens to be incident to the second lens, and the third lens is used for collecting the regulated frequency multiplication laser and emitting the regulated frequency multiplication laser to the optical fiber output assembly.
Optionally, the frequency doubling component comprises a frequency doubling crystal and a temperature control furnace;
The frequency doubling crystal is used for forming mixed laser after frequency doubling of the fundamental frequency laser and making the mixed laser incident to the facula compensation component; the temperature control furnace is used for bearing the frequency doubling crystal and keeping the frequency doubling crystal at a quasi-phase matching requirement temperature point.
Optionally, the incident surface and the emergent surface of the frequency doubling crystal are both provided with antireflection films for the fundamental frequency laser wave band and the frequency doubling laser wave band.
Optionally, the frequency multiplication assembly further comprises a half-wave plate, a focusing element and a light splitting element, wherein the half-wave plate, the focusing element, the frequency multiplication crystal and the light splitting element are coaxially arranged in sequence;
The half-wave plate is used for changing the polarization state of the fundamental frequency laser and then making the fundamental frequency laser incident to the focusing element;
The focusing element is used for focusing fundamental frequency laser emitted by the half-wave plate and making the fundamental frequency laser incident to the frequency doubling crystal;
the beam splitting element is used for splitting the mixed laser emitted by the frequency doubling crystal into a fundamental frequency laser beam and a frequency doubling laser beam;
the frequency multiplication laser beam is incident to the light spot compensation assembly, and the fundamental frequency laser beam is transmitted to an area outside the light spot compensation assembly.
Optionally, the frequency doubling crystal is any one of periodically polarized lithium niobate, periodically polarized lithium tantalate and periodically polarized potassium titanyl phosphate.
Optionally, the surface of the half-wave plate and the surface of the focusing element are both provided with an antireflection film of a fundamental laser band.
Optionally, the light splitting element is provided with an antireflection film for the fundamental frequency laser band, an antireflection film for the frequency doubling laser band, or the light splitting element is provided with an antireflection film for the fundamental frequency laser band, and an antireflection film for the frequency doubling laser band.
Optionally, the optical fiber output assembly includes a coupler with a tail fiber and a visible light output head, and an output end of the tail fiber of the coupler is connected with the visible light output head;
the coupler is used for coupling the frequency multiplication laser emitted by the facula compensation component into the tail fiber, and the frequency multiplication laser is output from the visible light output head.
Optionally, the visible light output head is a collimation output head.
The invention discloses a visible light laser with optical fiber output, which comprises a fundamental frequency light source, a frequency doubling component, a light spot compensation component and an optical fiber output component; the flare compensation component comprises at least one first lens and a position adjustment unit; the fundamental frequency light source is used for outputting fundamental frequency laser, the fundamental frequency laser is incident to the frequency multiplication component to generate frequency multiplication laser, the frequency multiplication laser is incident to the light spot compensation component, the light spot of the frequency multiplication laser is regulated by the light spot compensation component and then coupled to the optical fiber output component, and the optical fiber output component is used for outputting the frequency multiplication laser; the adjusting unit is used for adjusting the position of the first lens in the direction parallel to the first direction so as to change the beam waist of the frequency doubling laser; the first direction is the optical axis direction of the first lens. The visible light laser output by the optical fiber provided by the invention outputs visible light of a space after frequency multiplication based on the fundamental frequency laser output by the fundamental frequency light source, and the different positions of the lens are regulated by the position regulating unit to match the light beams required by the optical fiber coupler under different powers.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention or to delineate the scope of the invention. Other features of the present invention will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a visible light laser with optical fiber output according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of another optical fiber output visible light laser according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another optical fiber output visible light laser according to an embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present invention may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution of the present invention are achieved, and the present invention is not limited herein.
In the prior art, after the frequency doubling component is adjusted to the optimal coupling efficiency at low power, the coupling efficiency tends to decrease along with the increase of the frequency doubling power, because as the power increases, the linear absorption heat generation in the frequency doubling crystal causes obvious thermal lens effect, so that output light spots change, further the light spots on the end face of the coupler deviate from the state when the optimal coupling efficiency, the frequency doubling efficiency decreases, and the coupler is seriously damaged.
Fig. 1 is a schematic structural diagram of a visible light laser with optical fiber output provided in an embodiment of the present invention, and referring to fig. 1, the embodiment of the present invention provides a visible light laser with optical fiber output, which includes a fundamental frequency light source 1, a frequency doubling component 2, a light spot compensation component 3 and an optical fiber output component 4; the flare compensation assembly 3 comprises at least one first lens 31 and a position adjustment unit 32; the fundamental frequency light source 1 is used for outputting fundamental frequency laser, the fundamental frequency laser is incident to the frequency doubling component 2 to generate frequency doubling laser, the frequency doubling laser is incident to the light spot compensation component 3, the light spot of the frequency doubling laser is regulated by the light spot compensation component 3 and then coupled to the optical fiber output component 4, and the optical fiber output component 4 is used for outputting the frequency doubling laser; wherein the position adjusting unit 32 is used for adjusting the position of the first lens 31 in parallel to the first direction to change the beam waist of the frequency-doubled laser light; the first direction is the optical axis direction of the first lens 31.
Specifically, the visible light laser output by the optical fiber provided by the embodiment of the invention comprises a fundamental frequency light source 1, wherein the fundamental frequency light source 1 is specifically used for emitting fundamental frequency laser, and can emit fundamental frequency light with a wavelength of 1064 nanometers in an exemplary manner; the frequency doubling component 2 is specifically configured to frequency-double the fundamental frequency laser emitted by the fundamental frequency light source 1, that is, frequency-double the fundamental frequency laser into frequency-doubled laser, which may be, for example, 2 frequency-doubled, that is, frequency-doubled laser with a wavelength of 532 nm after the fundamental frequency laser is frequency-doubled by the frequency doubling component 2;
The flare compensation component 3 comprises at least one first lens 31 and a position adjustment unit 32, after the fundamental frequency laser emitted by the fundamental frequency light source 1 is incident to the frequency multiplication component 2, the fundamental frequency laser generates frequency multiplication laser after being subjected to frequency multiplication by the frequency multiplication component 2, the frequency multiplication laser is incident to the flare compensation component 3, the flare compensation component 3 adjusts the flare of the frequency multiplication laser and is coupled to the optical fiber output component 4, and finally the optical fiber output component 4 outputs the frequency multiplication laser, and the flare compensation component 3 adjusts the flare of the frequency multiplication laser according to the specific principle that: the first lens 31 is controlled by the position adjusting unit 32 to perform displacement in the first direction, so that the beam waist of the frequency-doubling laser can be changed, the beam waist refers to the place with the smallest beam radius in the laser beam propagation direction, and the beam waist of the frequency-doubling laser is changed to adjust the light spot of the frequency-doubling laser, so that the thermal lens effect caused by the linear absorption and heat generation in the frequency-doubling assembly 2 along with the rising of power in the frequency-doubling assembly 2 is compensated. And finally, outputting the compensated frequency-doubled laser by the optical fiber output assembly 4.
The visible light laser output by the optical fiber provided by the embodiment of the invention outputs visible light of a space after frequency multiplication based on the fundamental frequency laser output by the fundamental frequency light source, and the different positions of the lens are regulated by the position regulating unit to match the light beams required by the optical fiber coupler under different powers.
Fig. 2 is a schematic structural diagram of another optical fiber output visible light laser according to an embodiment of the present invention, and referring to fig. 2, the optical spot compensation assembly 3 further includes a second lens 33 and a third lens 34; the frequency-doubled laser is modulated by the first lens 31 and is incident on the second lens 33, and the third lens 34 is used for collecting the modulated frequency-doubled laser and outputting the modulated frequency-doubled laser to the optical fiber output assembly 4.
Specifically, in fig. 2, the red filled portion represents the fundamental frequency laser light, the green filled portion represents the frequency-doubled laser light, the spot compensation assembly 3 further includes a second lens 33 and a third lens 34, after the frequency-doubled laser light is incident on the first lens 31, the position adjustment unit 32 controls the position of the first lens 31 in the first direction X to change the beam waist size of the frequency-doubled laser light, then the adjusted frequency-doubled laser light is incident on the second lens 33, and the third lens 34 receives the adjusted frequency-doubled laser light and outputs the frequency-doubled laser light to the optical fiber output assembly 4, which may be exemplified by convex lenses or the like, and the embodiment of the present invention is not limited thereto.
With continued reference to fig. 2, the frequency doubling assembly 2 optionally includes a frequency doubling crystal 21 and a temperature controlled oven 22; the frequency doubling crystal 21 is used for doubling the fundamental frequency laser to form mixed laser and incidence the mixed laser to the facula compensation component 3; the temperature control furnace 22 is used for carrying the frequency doubling crystal 21 and keeping the frequency doubling crystal 21 at a quasi-phase matching requirement temperature point.
Specifically, the function of the frequency doubling crystal 21 is to convert the input fundamental frequency laser into laser with higher frequency, this process requires that the temperature inside the frequency doubling crystal 21 is kept stable, and because excessive temperature changes may cause phase mismatch, thereby affecting the frequency doubling efficiency, the frequency doubling crystal 21 and the temperature control furnace 22 are two components that are tightly matched, so that the stability and efficiency of the laser at the time of high power output are ensured together. The frequency doubling assembly 2 includes a frequency doubling crystal 21 and a temperature control furnace 22, wherein the frequency doubling crystal 21 is used for frequency doubling the fundamental frequency laser and outputting mixed laser containing the fundamental frequency laser and the frequency doubling laser, it is understood that although the frequency doubling crystal 21 and the temperature control furnace 22 can frequency double the fundamental frequency laser and convert the fundamental frequency laser into laser with higher frequency, the conversion efficiency is not 100%, therefore, the laser emitted by the frequency doubling crystal 21 is mixed laser, the mixed laser is incident into the spot compensation assembly 3, and the temperature control furnace 22 is used for bearing the frequency doubling crystal 21 and keeping the temperature of the frequency doubling crystal 21 at a temperature point required by quasi-phase matching. The setting of the temperature point can be designed according to practical conditions.
Optionally, the incident surface and the exit surface of the frequency doubling crystal 21 are both provided with antireflection films for the fundamental frequency laser band and the frequency doubling laser band.
Specifically, the antireflection film is an optical film for reducing reflection loss at the surface of an optical element, thereby improving the transmittance of an optical system. The incident surface and the emergent surface of the frequency doubling crystal 21 are provided with antireflection films for the fundamental frequency laser wave band and the frequency doubling laser wave band, so that the loss of transmission of the fundamental frequency laser and the frequency doubling laser can be reduced better, and the transmissivity can be improved.
With continued reference to fig. 2, optionally, the frequency doubling component 2 further includes a half-wave plate 23, a focusing element 24 and a beam splitting element 25, where the half-wave plate 23, the focusing element 24, the frequency doubling crystal 21 and the beam splitting element 25 are coaxially arranged in sequence along the first direction X; the half-wave plate 23 is used for changing the polarization state of the fundamental laser and then making the fundamental laser incident on the focusing element 24; the focusing element 24 is used for focusing the fundamental frequency laser emitted by the half-wave plate 23 and making the fundamental frequency laser incident on the frequency doubling crystal 21; the beam splitting element 25 is configured to split the mixed laser beam emitted from the frequency doubling crystal 21 into a fundamental frequency laser beam and a frequency doubling laser beam; the frequency-doubled laser beam is incident to the flare compensation component 3, and the fundamental frequency laser beam is transmitted to an area outside the flare compensation component 3.
Optionally, the embodiment of the present invention further includes a fundamental frequency light collimation output head 5.
Specifically, the half-wave plate 23 is an optical element that can change the polarization state of light, and uses the characteristics of a birefringent crystal to realize control of the phase difference of light. The frequency doubling component 2 comprises a half wave plate 23, a focusing element 24 and a light splitting element 25, wherein the half wave plate 23, the focusing element 24, the frequency doubling crystal 21 and the light splitting element 25 are coaxially arranged along an optical axis in sequence; the half-wave plate 23 is used for changing the polarization state of the fundamental frequency laser emitted from the collimation output head 5, and making the fundamental frequency laser with changed polarization state incident on the focusing element 24, the focusing element 24 is used for focusing the fundamental frequency laser emitted from the half-wave plate 23 and making the fundamental frequency laser incident into the frequency doubling crystal 21, and the beam splitting element 25 is used for splitting the mixed laser emitted from the frequency doubling crystal 21 into a fundamental frequency laser beam and a frequency doubling laser beam; the frequency-doubled laser beam is incident to the flare compensation component 3, and the fundamental frequency laser beam is transmitted to an area outside the flare compensation component 3.
Alternatively, the frequency doubling crystal 21 may be any one of periodically poled lithium niobate (Periodically Poled Lithium Niobate, PPLN), periodically poled lithium tantalate (Periodically Poled Stoichiometric LiTaO, PPSLT), and periodically poled potassium titanyl phosphate (Periodically Poled KTP, PPKTP).
Optionally, the surface of the half-wave plate 23 and the surface of the focusing element 24 are both provided with an antireflection film of the fundamental laser band.
Specifically, the antireflection films of the fundamental frequency laser wave bands are arranged on the surfaces of the half-wave plate 23 and the focusing element 24, so that loss of fundamental frequency laser during transmission of the half-wave plate 23 and the focusing element 24 can be reduced, and the transmissivity of the optical system can be increased.
Optionally, the light splitting element 25 is provided with an antireflection film for the fundamental frequency laser band, an antireflection film for the frequency doubling laser band, or the light splitting element 25 is provided with an antireflection film for the fundamental frequency laser band, an antireflection film for the frequency doubling laser band.
Specifically, the light splitting element 25 is provided with an antireflection film for the fundamental frequency laser band, an antireflection film for the frequency-doubled laser band, and as shown in fig. 2, the reflection of the fundamental frequency laser band in the mixed laser is high; high transmission to the frequency multiplication laser wave band in the mixed laser.
FIG. 3 is a schematic diagram of another optical fiber output visible light laser according to an embodiment of the present invention; as shown in fig. 3, the spectroscopic element 25 is provided with an antireflection film for the fundamental laser band and an antireflection film for the frequency-doubled laser band.
Specifically, the light splitting element 25 is provided with an antireflection film for the fundamental frequency laser band, an antireflection film for the frequency multiplication laser band, and high transmittance for the fundamental frequency laser band in the mixed laser; high reflection to the frequency multiplication laser wave band in the mixed laser.
Referring to fig. 2-3, the optical fiber output assembly 4 optionally includes a coupler 41 with a pigtail and a visible light output head 42, where an output end of the pigtail of the coupler 41 is connected to the visible light output head 42; the coupler 41 is used for coupling the frequency multiplication laser emitted by the facula compensation assembly 3 into the tail fiber, and the frequency multiplication laser is output from the visible light output head 42.
Specifically, coupler 41 is an optical fiber device for coupling optical signals from free space into an optical fiber. The visible light output head 42 is a device capable of emitting visible light, the optical fiber output assembly 4 comprises a coupler 41 with a tail fiber and the visible light output head 42, the tail fiber output end of the coupler 41 is connected with the visible light output head 42, the coupler 41 is used for coupling frequency multiplication laser emitted by the facula compensation assembly 3 into the tail fiber, and the frequency multiplication laser is output from the visible light output head 42.
Optionally, the visible light output head is a collimation output head.
According to the embodiment of the invention, the position of the first lens in the optical axis direction is adjusted by the position adjusting unit to compensate the thermal lens effect generated by the frequency doubling component during working, the position of the first lens is calibrated under each power, the optimal coupling efficiency is realized during high-power frequency doubling output, and the high-power optical fiber output frequency doubling laser is realized.
The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (10)
1. The visible light laser with the optical fiber output is characterized by comprising a fundamental frequency light source, a frequency doubling component, a light spot compensation component and an optical fiber output component; the flare compensation component comprises at least one first lens and a position adjustment unit;
The fundamental frequency light source is used for outputting fundamental frequency laser, the fundamental frequency laser is incident to the frequency multiplication component to generate frequency multiplication laser, the frequency multiplication laser is incident to the facula compensation component, the facula compensation component adjusts the facula of the frequency multiplication laser and then is coupled to the optical fiber output component, and the optical fiber output component is used for outputting the frequency multiplication laser;
Wherein the position adjusting unit is used for adjusting the position of the first lens in a direction parallel to a first direction so as to change the beam waist of the frequency doubling laser; the first direction is an optical axis direction of the first lens.
2. The fiber output visible laser of claim 1, wherein the spot compensation assembly further comprises a second lens and a third lens;
The frequency multiplication laser is regulated by the first lens to be incident to the second lens, and the third lens is used for collecting the regulated frequency multiplication laser and emitting the regulated frequency multiplication laser to the optical fiber output assembly.
3. The fiber output visible laser of claim 1, wherein the frequency doubling component comprises a frequency doubling crystal and a temperature controlled oven;
The frequency doubling crystal is used for forming mixed laser after frequency doubling of the fundamental frequency laser and making the mixed laser incident to the facula compensation component; the temperature control furnace is used for bearing the frequency doubling crystal and keeping the frequency doubling crystal at a quasi-phase matching requirement temperature point.
4. The optical fiber output visible light laser according to claim 3, wherein the incident surface and the exit surface of the frequency doubling crystal are provided with antireflection films for fundamental frequency laser bands and frequency doubling laser bands.
5. The optical fiber output visible light laser according to claim 3, wherein the frequency doubling component further comprises a half-wave plate, a focusing element and a light splitting element, and the half-wave plate, the focusing element, the frequency doubling crystal and the light splitting element are coaxially arranged in sequence;
The half-wave plate is used for changing the polarization state of the fundamental frequency laser and then making the fundamental frequency laser incident to the focusing element;
The focusing element is used for focusing fundamental frequency laser emitted by the half-wave plate and making the fundamental frequency laser incident to the frequency doubling crystal;
the beam splitting element is used for splitting the mixed laser emitted by the frequency doubling crystal into a fundamental frequency laser beam and a frequency doubling laser beam;
the frequency multiplication laser beam is incident to the light spot compensation assembly, and the fundamental frequency laser beam is transmitted to an area outside the light spot compensation assembly.
6. The optical fiber output visible light laser according to claim 3, wherein the frequency doubling crystal is any one of periodically polarized lithium niobate, periodically polarized lithium tantalate, and periodically polarized potassium titanyl phosphate.
7. The optical fiber output visible light laser according to claim 5, wherein the surface of the half wave plate and the surface of the focusing element are both provided with an antireflection film of a fundamental laser band.
8. The optical fiber output visible light laser according to claim 5, wherein the light splitting element is provided with an antireflection film for a fundamental frequency laser band, an antireflection film for a frequency doubling laser band, or an antireflection film for a fundamental frequency laser band, an antireflection film for a frequency doubling laser band.
9. The optical fiber output visible light laser according to claim 1, wherein the optical fiber output assembly comprises a coupler with a tail fiber and a visible light output head, and an output end of the tail fiber of the coupler is connected with the visible light output head;
the coupler is used for coupling the frequency multiplication laser emitted by the facula compensation component into the tail fiber, and the frequency multiplication laser is output from the visible light output head.
10. The fiber output visible light laser of claim 9, wherein the visible light output head is a collimated output head.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410460738.XA CN118299902A (en) | 2024-04-17 | 2024-04-17 | Visible light laser with optical fiber output |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410460738.XA CN118299902A (en) | 2024-04-17 | 2024-04-17 | Visible light laser with optical fiber output |
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