CN220553696U - Tunable green laser - Google Patents
Tunable green laser Download PDFInfo
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- CN220553696U CN220553696U CN202322024983.XU CN202322024983U CN220553696U CN 220553696 U CN220553696 U CN 220553696U CN 202322024983 U CN202322024983 U CN 202322024983U CN 220553696 U CN220553696 U CN 220553696U
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- 239000013078 crystal Substances 0.000 claims abstract description 68
- 238000005086 pumping Methods 0.000 claims abstract description 9
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052769 Ytterbium Inorganic materials 0.000 claims description 18
- 230000005540 biological transmission Effects 0.000 claims description 16
- -1 ytterbium ion Chemical class 0.000 claims description 12
- NAWDYIZEMPQZHO-UHFFFAOYSA-N ytterbium Chemical compound [Yb] NAWDYIZEMPQZHO-UHFFFAOYSA-N 0.000 claims description 9
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 6
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 5
- 239000000292 calcium oxide Substances 0.000 claims description 5
- 239000000498 cooling water Substances 0.000 claims description 4
- FYEDOTFGYHQLDV-UHFFFAOYSA-N B([O-])([O-])[O-].[O-2].[Gd+3].[Ca+2] Chemical compound B([O-])([O-])[O-].[O-2].[Gd+3].[Ca+2] FYEDOTFGYHQLDV-UHFFFAOYSA-N 0.000 claims description 3
- CXJOZXNMZAWPPX-UHFFFAOYSA-N B([O-])([O-])[O-].[O-2].[La+3].[Ca+2] Chemical compound B([O-])([O-])[O-].[O-2].[La+3].[Ca+2] CXJOZXNMZAWPPX-UHFFFAOYSA-N 0.000 claims description 3
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 claims description 3
- 229910001369 Brass Inorganic materials 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 239000010951 brass Substances 0.000 claims description 3
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 3
- ZYCNQNXMWCTETO-UHFFFAOYSA-N calcium oxygen(2-) yttrium(3+) borate Chemical compound [O-2].[Y+3].B([O-])([O-])[O-].[Ca+2] ZYCNQNXMWCTETO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 150000002910 rare earth metals Chemical class 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 230000010355 oscillation Effects 0.000 abstract description 2
- 230000010354 integration Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 6
- 230000003287 optical effect Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
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Abstract
The utility model discloses a tunable green laser, comprising: the laser device comprises a pumping source, a 45-degree dichroic mirror, a 0-degree dichroic mirror, a self-frequency doubling laser crystal, a wavelength tuning element, a total reflection mirror and an output cavity mirror; the power output of the pump light is controlled by adjusting the current, the pump light is emitted into the self-frequency doubling laser crystal after passing through the 45-degree dichroic mirror, the fundamental frequency light is generated in the resonant cavity, the green laser output is realized through the frequency doubling effect of the self-frequency doubling laser crystal, the loss of different wavelengths in the cavity is changed by adjusting the angle of the F-P etalon, and the oscillation of different fundamental frequency lights in the cavity is realized, so that the output of different frequency doubling lights is obtained. The utility model solves the tunability of the output wavelength of the self-frequency-doubling green laser, solves the problems of higher cost and complex adjustment of the laser made of the traditional two crystals in the prior art, and has the advantages of low cost, small volume, simple structure, light weight, integration and the like.
Description
Technical Field
The utility model relates to the field of laser and nonlinear crystal devices, in particular to a tunable green laser.
Background
At present, most of the modes for obtaining the tunable green laser are modes for combining laser crystals and nonlinear crystals, the frequency conversion is carried out on infrared laser with a wave band of 1 mu m, the frequency conversion is formed by nonlinear frequency conversion processes such as frequency multiplication or frequency summation, the frequency multiplication or frequency summation process needs to match the angles, polarization states and the like of the laser crystals and the nonlinear crystals, and the adjustment is complex. Meanwhile, the nonlinear optical crystal is a core component in the optical frequency converter and is also the most expensive component in the optical frequency converter, so compared with a laser manufactured by the traditional two crystals, the nonlinear optical crystal has higher cost and complex adjustment.
Accordingly, there is an urgent need for improvement in the currently existing shortfalls to solve the above-mentioned problems.
Disclosure of Invention
The utility model overcomes the defects of the prior art and provides a tunable green laser.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a tunable green laser, comprising:
the pumping source is a diode laser with emission wavelength of 940-980 nm;
a 45 ° dichroic mirror positioned at an output end of the pump source, comprising: a flat mirror and a first dielectric film plated on the surface of the flat mirror;
a 0 ° dichroic mirror at an output end of the 45 ° dichroic mirror, comprising: the flat mirror and the second dielectric film are plated on the surface of the flat mirror;
the self-frequency multiplication laser crystal is arranged between the 45-degree dichroic mirror and the 0-degree dichroic mirror, and is ytterbium ion doped calcium oxide rare earth borate salt crystal, and the light transmission direction of the self-frequency multiplication crystal is the direction with the maximum effective nonlinear coefficient of the crystal;
a wavelength tuning element located at an output end of the 0-degree dichroic mirror; the wavelength tuning element is one or more of an F-P etalon and a birefringent filter;
a total reflection mirror at the output end of the wavelength tuning element, comprising: the flat mirror and the third dielectric film are plated on the surface of the flat mirror;
the output cavity mirror and the full reflection mirror form a fundamental frequency laser resonant cavity, and the output cavity mirror comprises: the flat mirror and the fourth dielectric film plated on the surface of the flat mirror.
In a preferred embodiment of the present utility model, the ytterbium ion doped calcium oxide rare earth borate crystal is one or more of ytterbium doped calcium oxide gadolinium borate, ytterbium doped calcium oxide lanthanum borate and ytterbium doped calcium oxide yttrium borate, wherein the ytterbium ion doping concentration is 1at.% to 50at.%.
In a preferred embodiment of the present utility model, the light passing surface of the self-frequency doubling crystal is square, rectangular or circular.
In a preferred embodiment of the utility model, the light transmission direction of the self-frequency doubling crystal is the length direction of the crystal, and the length is 0.5mm-50mm; the width or diameter of the light-passing surface is 0.4mm-10mm.
In a preferred embodiment of the present utility model, the cutting direction of the self-frequency doubling crystal is the optimum phase matching direction along the effective nonlinear coefficient of the non-principal plane.
In a preferred embodiment of the present utility model, the first dielectric film includes a dielectric film highly transparent to the pump light 940nm to 980nm and a dielectric film highly reflective to 1000 nm to 1100nm and 500nm to 550nm at 45 ° incidence.
In a preferred embodiment of the present utility model, the second dielectric film includes a dielectric film highly reflecting the pump light 940nm-980nm and the frequency-doubled light 500nm-550nm and a dielectric film highly transmitting the pump light 1000-1100 nm.
In a preferred embodiment of the present utility model, the third dielectric film is a dielectric film highly reflecting the pump light 940nm-980nm, the frequency doubling light 500nm-550nm and the fundamental frequency light 1000-1100 nm.
In a preferred embodiment of the present utility model, the fourth dielectric film includes a dielectric film highly reflecting the pump light 940nm-980nm and the fundamental light 1000 nm-1100 nm and having a high transmission for the frequency doubling light 500nm-550 nm.
In a preferred embodiment of the present utility model, the self-frequency doubling laser crystal is wrapped on a heat sink; the heat sink is made of red copper or brass, and circulating cooling water or a TEC refrigerating sheet is connected to the heat sink.
The utility model solves the defects existing in the background technology, and has the following beneficial effects:
(1) The utility model provides a tunable green laser, which can obtain green laser output with different wavelengths by adjusting the position, angle and other parameters of a wavelength tuning element only by using one crystal, realizes the tunability of the output wavelength of the green laser, and solves the problems of higher cost and complex adjustment of the traditional two-crystal laser in the prior art.
(2) The tunable green laser output can be realized structurally by adopting a crystal structure, so that the fundamental frequency laser generation process and the frequency doubling process occur in one crystal, the continuous tuning of the fundamental frequency laser is realized by using the wavelength tuning element, the continuous tuning of the green laser is further realized, the number of optical crystals is reduced, the complexity of the laser is reduced, and the stability is improved while the cost is reduced.
Drawings
The utility model is further described below with reference to the drawings and examples;
FIG. 1 is a schematic view of a laser structure of a preferred embodiment 1 of the present utility model;
FIG. 2 is a spectrum of green laser light of the preferred embodiment 1 of the present utility model;
in the figure: 1. a pump source; 2. a 45 DEG dichroic mirror; 3. self-frequency-doubling laser crystal; 4. a 0 dichroic mirror; 5. a wavelength tuning element; 6. a total reflection mirror; 7. and outputting the cavity mirror.
Detailed Description
The utility model will now be described in further detail with reference to the drawings and examples, which are simplified schematic illustrations of the basic structure of the utility model, which are presented only by way of illustration, and thus show only the structures that are relevant to the utility model.
The utility model provides a tunable green laser, comprising:
the pumping source is a diode laser with emission wavelength of 940-980 nm;
a 45 ° dichroic mirror at an output of the pump source, comprising: a flat mirror and a first dielectric film plated on the surface of the flat mirror; the device is used for transmitting the pump light and reflecting fundamental frequency light and frequency doubling light; the first dielectric film comprises a dielectric film which is highly transparent to pump light 940nm-980nm at 45 DEG incidence and a dielectric film which is highly reflective to pump light 1000-1100nm and 500nm-550 nm;
a 0 ° dichroic mirror at an output of the 45 ° dichroic mirror, comprising: a flat mirror and a second dielectric film plated on the surface of the flat mirror; the device is used for transmitting the fundamental frequency light and reflecting the frequency multiplication light and the pump light; the second dielectric film comprises a dielectric film with high reflection for pump light 940nm-980nm and frequency multiplication light 500nm-550nm and a dielectric film with high transmission for pump light 1000-1100 nm;
the self-frequency multiplication laser crystal is arranged between the 45-degree dichroic mirror and the 0-degree dichroic mirror, and is ytterbium ion doped calcium oxide rare earth borate salt crystal, and the light transmission direction of the self-frequency multiplication crystal is the direction with the maximum effective nonlinear coefficient of the crystal;
a wavelength tuning element at the output of the 0 DEG dichroic mirror; the wavelength tuning element is one or more of an F-P etalon and a birefringent filter; the device is used for tuning the wavelength of fundamental frequency light, and then tuning the wavelength of green laser;
a total reflection mirror at an output end of the wavelength tuning element, comprising: a flat mirror and a third dielectric film plated on the surface of the flat mirror; for reflecting pump light, fundamental frequency light and frequency-doubled light; the third dielectric film is a dielectric film with high reflection to pump light 940nm-980nm, frequency doubling light 500nm-550nm and fundamental frequency light 1000-1100 nm;
the output cavity mirror and the full reflection mirror form a fundamental frequency laser resonant cavity, and the output cavity mirror comprises: a flat mirror and a fourth dielectric film plated on the surface of the flat mirror; the fourth dielectric film comprises a dielectric film which is highly reflective to the pump light 940nm-980nm and the fundamental frequency light 1000-1100nm and has high transmission to the frequency doubling light 500nm-550 nm.
The utility model can obtain green laser output with different wavelengths by adjusting the position, angle and other parameters of the wavelength tuning element by only using one crystal, realizes the tunability of the output wavelength of the green laser, and solves the problems of higher cost and complex adjustment of the traditional laser manufactured by two crystals in the prior art.
The ytterbium ion doped calcium oxide rare earth borate crystal is one or more of ytterbium doped calcium oxide gadolinium borate, ytterbium doped calcium oxide lanthanum borate and ytterbium doped calcium oxide yttrium borate, wherein the ytterbium ion doping concentration is 1at percent to 50at percent.
The light transmission surface of the self-frequency doubling crystal is square, rectangular or circular; the light transmission direction of the self-frequency doubling crystal is the length direction of the crystal, and the length is 0.5mm-50mm; the width or diameter of the light-passing surface is 0.4mm-10mm. Preferably, the self-frequency doubling crystal has a length of 6mm-10mm, the crystal light-passing surface is square, and the side length of the square is 1mm-3mm; preferably, heat sink cooling is adopted on four non-light-passing surfaces of the self-frequency doubling crystal.
The cutting direction of the self-frequency doubling crystal is the optimal phase matching direction along the effective nonlinear coefficient of the non-main plane. Preferably, the optimal phase matching direction is in the range of (120++10°) from the principal axis direction (Z axis) where the crystal refractive index is maximum and in the range of- (40++10°) from the principal axis direction (X axis) where the crystal refractive index is minimum.
In the utility model, the self-frequency doubling laser crystal is wrapped on the heat sink; the heat sink is made of red copper or brass, and circulating cooling water or a TEC refrigerating sheet is connected in the heat sink.
The tunable green laser output can be realized by adopting a crystal structure, so that the fundamental frequency laser generation process and the frequency doubling process occur in one crystal, and the continuous tuning of the fundamental frequency laser is realized by using the wavelength tuning element, so that the continuous tuning of the green laser is realized.
Example 1:
as shown in fig. 1, a schematic diagram of the laser structure of the preferred embodiment 1 is shown, including a pump source 1, a 45 ° dichroic mirror 2, a self-frequency doubling laser crystal 3, a 0 ° dichroic mirror 4, a wavelength tuning element 5, a total reflection mirror 6, and an output cavity mirror 7, all of which are arranged as shown in fig. 1.
In the present embodiment, the self-frequency doubling laser crystal 3 is Yb 3+ Yb with ion doping concentration of 15 at.%:the YCOB crystal is cut along the class I phase matching angle of 1030nm frequency multiplication, the cutting angle is (113 degrees, 39 degrees), the cross section of the crystal is square with the width of 3mm, and the length of the crystal along the light transmission direction is 6mm.
In the present embodiment, the 45 ° dichroic mirror 2 includes: a flat mirror and a first dielectric film plated on the surface of the flat mirror; the first dielectric film includes a dielectric film highly transparent to pump light 940nm to 980nm at 45 DEG incidence and a dielectric film highly reflective to 1000 nm to 1100nm and 500nm to 550 nm.
The 0 ° dichroic mirror 4 includes: a flat mirror and a second dielectric film plated on the surface of the flat mirror; the second dielectric film comprises a dielectric film with high reflection to pump light 940nm-980nm and frequency multiplication light 500nm-550nm and a dielectric film with high transmission to pump light 1000-1100 nm.
The total reflection mirror 6 includes: a flat mirror and a third dielectric film plated on the surface of the flat mirror; the third dielectric film is a dielectric film with high reflection to the pump light 940nm-980nm, the frequency doubling light 500nm-550nm and the fundamental frequency light 1000-1100 nm.
The output cavity mirror 7 includes: a flat mirror and a fourth dielectric film plated on the surface of the flat mirror; the fourth dielectric film comprises a dielectric film which is highly reflective to the pump light 940nm-980nm and the fundamental frequency light 1000-1100nm and has high transmission to the frequency doubling light 500nm-550 nm.
In this embodiment, the wavelength tuning element 5 is an F-P etalon; the self-frequency doubling laser crystal 3 is wrapped with a heat sink, and circulating cooling water is filled in the heat sink to stabilize the temperature of the self-frequency doubling laser crystal 3 within a certain range.
The power supply of the near pumping source 1 is turned on, the power output of pumping light is controlled by adjusting the current on the pumping source 1, the pumping light emitted by the pumping source 1 is emitted into the self-frequency doubling laser crystal 3 after passing through the 45-degree dichroic mirror 2, fundamental frequency light is generated in the resonant cavity, green laser output is realized through the frequency doubling effect of the self-frequency doubling laser crystal 3, the loss of different wavelengths in the cavity is changed by adjusting the angle of the F-P etalon, and the oscillation of different fundamental frequency light in the cavity is realized, so that the output of different frequency doubling lights is obtained. The spectra of several green lasers output are shown in fig. 2.
Example 2:
the structure of this embodiment is as shown in embodiment 1, except that in this embodiment, the wavelength tuning element 5 is a birefringent filter.
Example 3:
the structure of this embodiment is as in embodiment 1, except that in this embodiment, the self-frequency doubling laser crystal 3 is Yb 3+ Yb: gdCOB crystal with ion doping concentration of 15at.% is cut along class I phase matching angle of 1030nm frequency multiplication, and the cutting angle is (113 degrees, 50 degrees).
The above-described preferred embodiments according to the present utility model are intended to suggest that, from the above description, various changes and modifications can be made by the person skilled in the art without departing from the scope of the technical idea of the present utility model. The technical scope of the present utility model is not limited to the description, but must be determined according to the scope of claims.
Claims (10)
1. A tunable green laser, comprising:
the pumping source (1) is a diode laser with emission wavelength of 940-980 nm;
a 45 ° dichroic mirror (2) located at the output of the pump source (1), comprising: a flat mirror and a first dielectric film plated on the surface of the flat mirror;
a 0-degree dichroic mirror (4) located at an output end of the 45-degree dichroic mirror (2), comprising: the flat mirror and the second dielectric film are plated on the surface of the flat mirror;
the self-frequency-doubling laser crystal (3) is arranged between the 45-degree dichroic mirror (2) and the 0-degree dichroic mirror (4) and is a ytterbium ion doped calcium borate oxygen rare earth salt crystal, and the light transmission direction of the self-frequency-doubling laser crystal is the direction with the maximum effective nonlinear coefficient of the crystal;
a wavelength tuning element (5) located at the output of the 0 DEG dichroic mirror (4); the wavelength tuning element (5) is one or more of an F-P etalon and a birefringent filter;
-a total reflection mirror (6) at the output of the wavelength tuning element (5), comprising: the flat mirror and the third dielectric film are plated on the surface of the flat mirror;
an output cavity mirror (7) and the full reflection mirror form a fundamental frequency laser resonant cavity, comprising: the flat mirror and the fourth dielectric film plated on the surface of the flat mirror.
2. A tunable green laser according to claim 1, wherein: the ytterbium ion doped calcium oxide rare earth borate crystal is one or more of ytterbium doped calcium oxide gadolinium borate, ytterbium doped calcium oxide lanthanum borate and ytterbium doped calcium oxide yttrium borate, wherein the ytterbium ion doping concentration is 1 at% -50 at%.
3. A tunable green laser according to claim 1, wherein: the light transmission surface of the self-frequency doubling laser crystal is square, rectangular or round.
4. A tunable green laser according to claim 3, wherein: the light transmission direction of the self-frequency-doubling laser crystal is the length direction of the crystal, and the length is 0.5mm-50mm; the width or diameter of the light-passing surface is 0.4mm-10mm.
5. A tunable green laser as defined in claim 4, wherein: the cutting direction of the self-frequency doubling laser crystal is the optimal phase matching direction along the effective nonlinear coefficient of the non-main plane.
6. A tunable green laser according to claim 1, wherein: the first dielectric film comprises a dielectric film which is highly transparent to pump light 940nm-980nm at 45 DEG incidence and a dielectric film which is highly reflective to pump light 1000-1100nm and 500nm-550 nm.
7. A tunable green laser according to claim 1, wherein: the second dielectric film comprises a dielectric film with high reflection to pump light 940nm-980nm and frequency multiplication light 500nm-550nm and a dielectric film with high transmission to pump light 1000-1100 nm.
8. A tunable green laser according to claim 1, wherein: the third dielectric film is a dielectric film with high reflection to pump light 940nm-980nm, frequency doubling light 500nm-550nm and fundamental frequency light 1000-1100 nm.
9. A tunable green laser according to claim 1, wherein: the fourth dielectric film comprises a dielectric film which is highly reflective to pump light 940nm-980nm and fundamental frequency light 1000-1100nm and has high transmission to frequency doubling light 500nm-550 nm.
10. A tunable green laser according to claim 5, wherein: the self-frequency doubling laser crystal (3) is wrapped on the heat sink; the heat sink is made of red copper or brass, and circulating cooling water or a TEC refrigerating sheet is connected to the heat sink.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322024983.XU CN220553696U (en) | 2023-07-31 | 2023-07-31 | Tunable green laser |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322024983.XU CN220553696U (en) | 2023-07-31 | 2023-07-31 | Tunable green laser |
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| Publication Number | Publication Date |
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| CN220553696U true CN220553696U (en) | 2024-03-01 |
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| CN202322024983.XU Active CN220553696U (en) | 2023-07-31 | 2023-07-31 | Tunable green laser |
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| CN (1) | CN220553696U (en) |
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2023
- 2023-07-31 CN CN202322024983.XU patent/CN220553696U/en active Active
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