CN104283101A - All-solid-state single-frequency tunable red laser - Google Patents
All-solid-state single-frequency tunable red laser Download PDFInfo
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- CN104283101A CN104283101A CN201410633186.4A CN201410633186A CN104283101A CN 104283101 A CN104283101 A CN 104283101A CN 201410633186 A CN201410633186 A CN 201410633186A CN 104283101 A CN104283101 A CN 104283101A
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Abstract
The invention discloses an all-solid-state single-frequency tunable red laser. The all-solid-state single-frequency tunable red laser comprises a laser diode, a pumping light shaping system, a resonant cavity, a gain medium, a frequency doubling crystal, a magneto-optical isolator and a frequency tuning device, wherein the laser diode is connected with the pumping light shaping system by virtue of optical fibers, light spots shaped by the pumping light shaping system are longitudinally pumped onto the gain medium, and fluorescence, excited with an infrared band, of the gain medium enters the resonant cavity. With the adoption of the all-solid-state single-frequency tunable red laser, the frequency continuous regulation of a 671nm red light is realized by the matching of an F-P etalon and piezoelectric ceramic, wherein the F-P etalon is used for crude regulation, and the piezoelectric ceramic is used for fine regulation; compared with a traditional 808nm pumping source, a 880nm pumping source adopted by the laser has the advantages that thermal lens effect of the crystal can be effectively reduced, and the conversion efficiency of the laser is improved; as the laser is in an annular cavity structure, the running is efficient and stable.
Description
Technical field
The invention belongs to a kind of red laser, be specifically related to a kind of all solid state single frequency tunable red laser.
Background technology
Laser diode (LD) end-face pump solid laser is subject to extensive concern in recent years, it has that efficiency is high, compact conformation, stable performance, life-span are long and the advantage such as all solidstate, is widely used in the fields such as laser radar, spectrum analysis, gravitational wave detection, coherent communications and quantum optices.
In general application, the most commonly 808nm optical pumping is adopted in laser diode end-face pump, and adopt 880nm laser can particle pumped to upper laser level as pump light, decrease the population of radiationless transition, reduce the energy loss that quantum imperfect tape comes, thus effectively reduce the heat load of laser medium.
In currently available technology, single frequency laser research is more, but for the tunable single frequency laser of 671nm red spectral band, because of the particularity of wavelength, narrow linewidth and tunable version, makes to be in development more than the design of this kind of laser and application.
Summary of the invention
The present invention proposes to overcome the shortcoming existed in prior art, its objective is and provides a kind of all solid state single frequency tunable red laser.
Technical scheme of the present invention is:
A kind of all solid state single frequency tunable red laser, comprise laser diode, pump light orthopedic systems, resonant cavity, gain media, frequency-doubling crystal, magneto-optic isolator and frequency tuning devices, described laser diode is connected with pump light orthopedic systems by optical fiber, the longitudinal pumping of hot spot after the shaping of pump light orthopedic systems is on gain media, and the fluorescence that gain media is inspired infrared band enters resonant cavity;
Described resonant cavity forms " 8 " word ring cavity structure by pump light input end face mirror, planar cavity mirror, concave surface chamber mirror and concave surface output cavity mirror; Pump light input end face mirror, planar cavity mirror and laser diode, pump light orthopedic systems are in same light path, concave surface chamber mirror is arranged at below pump light input end face mirror, concave surface output cavity mirror is arranged at below planar cavity mirror, and pump light input end face mirror is arranged between pump light orthopedic systems and gain media with inclination angle;
Described magneto-optic isolator is made up of Faraday rotator and 1/2nd wave plates; Faraday rotator and 1/2nd wave plates are arranged between pump light input end face mirror and planar cavity mirror, and are in same light path;
Described frequency tuning devices is made up of F-P etalon and piezoelectric ceramic; F-P etalon is arranged between concave surface chamber mirror and concave surface output cavity mirror, and is in same light path; Piezoelectric ceramic is fixed on the side of planar cavity mirror away from 1/2nd wave plates;
Described frequency-doubling crystal is arranged at the laser beam waist position between concave surface chamber mirror and concave surface output cavity mirror, and is on the right side of F-P etalon.
Described pump light orthopedic systems is made up of GRIN Lens, concave mirror, cylindrical mirror and condenser lens from left to right successively; The concave surface facing cylindrical mirror of concave mirror, the cylinder of cylindrical mirror and condenser lens (17) is oppositely arranged.
Described Faraday rotator is arranged at the side near pump light input end face mirror, and 1/2nd wave plates are arranged at the side near planar cavity mirror;
Described concave surface chamber mirror and concave surface output cavity mirror are arranged at same light path with inclination angle, and the concave surface facing planar cavity mirror of concave surface chamber mirror, the concave surface facing pump light input end face mirror of concave surface output cavity mirror.
Described pump light input end face mirror, planar cavity mirror, concave surface chamber mirror and concave surface output cavity mirror are to oscillating laser 1342nm total reflection
Described input end face mirror is coated with 880nm high permeability film near the one side of pump light orthopedic systems.
The concave surface of described concave surface output cavity mirror is coated with 671nm ruddiness high permeability film.
Described gain media is YVO
4-Nd:YVO
4bonded crystals, the both ends of the surface of gain media all plate 880nm antireflective film, 1342nm antireflective film and 1064nm antireflective film.
Described frequency-doubling crystal adopts the lbo crystal cut in I class angle automatching mode, and both ends of the surface are all coated with the double-colored anti-reflection film of 1342nm and 671nm.
The invention has the beneficial effects as follows:
The invention provides a kind of tunable, power output is higher, reliable and stable 671nm ruddiness single frequency laser, adopts F-P etalon and piezoelectric ceramic to coordinate and regulates the frequency realizing 671nm ruddiness to regulate continuously, and F-P etalon is used for coarse adjustment, piezoelectric ceramic fine tuning.Laser adopts 880nm pumping source, and compared with traditional 808nm pumping source, it can reduce the thermal lensing effect of crystal effectively, improves the conversion efficiency of laser; Laser adopts ring cavity structure, and running is efficient, stable.
Accompanying drawing explanation
Fig. 1 is the structural representation of all solid state single frequency tunable red laser of the present invention;
Fig. 2 is the structural representation of pump light orthopedic systems in the present invention.
Wherein:
1 laser diode 2 optical fiber
3 pump light orthopedic systems 4 pump light input end face mirrors
5 planar cavity mirror 6 concave surface chamber mirrors
7 concave surface output cavity mirror 8 gain medias
9 Faraday rotator 1/10th 2 wave plates
11 frequency-doubling crystal 12 F-P etalons
13 piezoelectric ceramic 14 GRIN Lens
15 concave mirror 16 cylindrical mirrors
17 condenser lenses.
Embodiment
Below in conjunction with Figure of description and embodiment, all solid state single frequency tunable red laser of the present invention is described in detail:
As shown in Figure 1, 2, a kind of all solid state single frequency tunable red laser, comprise laser diode 1, pump light orthopedic systems 3, resonant cavity, gain media 8, frequency-doubling crystal 11, magneto-optic isolator and frequency tuning devices, described laser diode 1 is connected with pump light orthopedic systems 3 by optical fiber 2, the longitudinal pumping of hot spot after pump light orthopedic systems 3 shaping is on gain media 8, and the fluorescence that gain media 8 is inspired infrared band enters resonant cavity;
Described resonant cavity forms " 8 " word ring cavity structure by pump light input end face mirror 4, planar cavity mirror 5, concave surface chamber mirror 6 and concave surface output cavity mirror 7; Input end face mirror 4, planar cavity mirror 5 are in same light path with laser diode 1, pump light orthopedic systems 3, concave surface chamber mirror 6 is arranged at below pump light input end face mirror 4, concave surface output cavity mirror 7 is arranged at below planar cavity mirror 5, and pump light input end face mirror 4 is arranged between pump light orthopedic systems 3 and gain media 8 with inclination angle;
Described magneto-optic isolator is made up of Faraday rotator 9 and 1/2nd wave plates 10; Faraday rotator 9 and 1/2nd wave plates 10 are arranged between pump light input end face mirror 4 and planar cavity mirror 5, and are in same light path; Described Faraday rotator 9 is arranged at the side near pump light input end face mirror 4, and 1/2nd wave plates 10 are arranged at the side near planar cavity mirror 5;
Described frequency tuning devices is made up of F-P etalon 12 and piezoelectric ceramic 13; F-P etalon 12 is arranged between concave surface chamber mirror 6 and concave surface output cavity mirror 7, and is in same light path; Piezoelectric ceramic 13 is fixed on the side of planar cavity mirror 5 away from 1/2nd wave plates 10;
Described frequency-doubling crystal 11 is arranged at the laser beam waist position between concave surface chamber mirror 6 and concave surface output cavity mirror 7, and is on the right side of F-P etalon 12.
Described pump light orthopedic systems 3 is made up of GRIN Lens 14, concave mirror 15, cylindrical mirror 16 and condenser lens 17 from left to right successively; The concave surface facing cylindrical mirror 16 of concave mirror 15, the cylinder of cylindrical mirror 16 and condenser lens 17 is oppositely arranged.
Described concave surface chamber mirror 6 and concave surface output cavity mirror 7 are arranged at same light path with inclination angle, and the concave surface facing planar cavity mirror 5 of concave surface chamber mirror 6, the concave surface facing pump light input end face mirror 4 of concave surface output cavity mirror 7.
Described pump light input end face mirror 4, planar cavity mirror 5, concave surface chamber mirror 6 and concave surface output cavity mirror 7 couples of oscillating laser 1342nm total reflection
Described input end face mirror 4 is coated with 880nm high permeability film near the one side of pump light orthopedic systems 3.
The concave surface of described concave surface output cavity mirror 7 is coated with 671nm ruddiness high permeability film.
Described gain media 8 is YVO
4-Nd:YVO
4bonded crystals, the both ends of the surface of gain media 8 all plate 880nm antireflective film, 1342nm antireflective film and 1064nm antireflective film.
Described frequency-doubling crystal 11 adopts the lbo crystal cut in I class angle automatching mode, and both ends of the surface are all coated with the double-colored anti-reflection film of 1342nm and 671nm.
Pumping source of the present invention is the LD laser that laser diode 1 high-power optical-fiber coupling exports, it has the features such as system pumping efficiency is high, Stability Analysis of Structures, centre wavelength 880nm, and fiber end face diameter is 400um, numerical aperture N.A. is 0.22, and maximum power output is 50W.Adopt the mode of 880nm pumped energy on particle pumped to laser, the population being used for radiationless transition can be reduced, reduce the energy loss that quantum imperfect tape comes, effectively reduce the heat build-up of laser medium, improve the Slop efficiency of laser.
Gain media 8 is YVO
4-Nd:YVO
4bonded crystals, compared with the single Nd:YV04 crystal of tradition, it has following advantage: eliminate the thermal lensing effect caused by face deformation; Avoid end face rete Yin Gaowen and thermal stress and destroyed, improve anti-light wound and explain value; Improve light one light conversion efficiency, improve the output beam quality of laser; Be specially adapted to the laser of high power semiconductor pump.
Because pump light orthopedic systems 3 is made up of a GRIN Lens, pairwise orthogonal cylindrical mirror and condenser lens, the spherical aberration of this system lenses is little, receipts optic angle is large, light gathering is strong, less focused spot size and suitable work focusing length can be obtained, to reach the better pattern matching of girdling the waist at gain media place and chamber mould.
Resonant cavity of the present invention adopts four mirrors " 8 " word ring cavity structure, and be made up of two level crossings and two concave mirrors, such light beam can form two waist spots in chamber, meets the requirement of pumping and overtone mode coupling respectively.In order to obtain high-power basic mode Laser output, meet following design criterion when designing resonant cavity: (I) TEM
00the diameter of mould must be subject to the restriction of active material, meets the pattern matching factor (about 0.8); Adopt suitable cavity resonator structure to obtain large diameter TEM
00, thus reach high light beam fill factor, curve factor, and then ensure efficient basic mode Laser output.(II) resonant cavity should be dynamic stability, and both resonant cavity was insensitive to the thermal focal change caused by pumping.(III) chamber mould must be quite insensitive to mechanical misalignment.(IV) selects suitable frequency-doubling crystal place to girdle the waist, and improves shg efficiency.
The mechanical tuning device of laser coordinates tuning composition by the F-P etalon 12 inserted in chamber and piezoelectric ceramic 13.The output frequency of laser is changed, to reach the coarse adjustment to laser frequency by the inclination angle changing F-P etalon.Due to F-P etalon be by modeling realize tuning, therefore can not realize continuous tuning.F-P etalon 12 is coordinated adjustment together with piezoelectric ceramic 13 for this reason, long to the chamber changing resonant cavity to the piezoelectric ceramic 13 be fixed on resonator mirror applies voltage, finally realize the continuous precision tuning of frequency.
The course of work of laser is as follows: the 880nm coupling pump light of laser diode 1 outgoing is to optical fiber 2 li, be transferred in pumping orthopedic systems 3 by optical fiber 2,880nm pump light to be shaped into after suitable spot size longitudinal pumping on gain media 8 through pumping orthopedic systems 3, the centre wavelength 880nm of pump source laser diode 1 overlaps with the absorption band of gain media 8, and gain media 8 is inspired the fluorescence of infrared band.1342nm infrared light is produced after the internal oscillation that fluorescence forms via input end face mirror 4, planar cavity mirror 5, concave surface chamber mirror 6 and concave surface output cavity mirror 7.Gain media 8 is YVO
4-Nd:YVO
4bonded crystals, the both ends of the surface of crystal, except plating 880nm, 1342nm antireflective film, also need plating 1064nm antireflective film for preventing the starting of oscillation in laser crystal of 1064nm light.The isolator be made up of Faraday rotator 9 and 1/2 wave plate 10 in resonant cavity makes laser Unidirectional.Frequency-doubling crystal 11 is placed on the laser beam waist position between concave surface chamber mirror 6 and concave surface output cavity mirror 7, makes 1342nm infrared light frequency multiplication be 671nm ruddiness, frequency-doubling crystal 11 adopt with I class angle automatching mode cut (
=86.1.，
=0。) lbo crystal, two ends plating 1342nm and 671nm double-colored anti-reflection film.Insert F-P etalon 12 in chamber, changed the output frequency of laser by the inclination angle changing F-P etalon, and coordinate the piezoelectric ceramic 13 be fixed on resonator mirror 5 to regulate together.Apply voltage on piezoelectric ceramic 13, realize the continuous precision tuning of frequency by the chamber length changing resonant cavity.
The invention provides a kind of tunable, power output is higher, reliable and stable 671nm ruddiness single frequency laser, adopts F-P etalon and piezoelectric ceramic to coordinate and regulates the frequency realizing 671nm ruddiness to regulate continuously, and F-P etalon is used for coarse adjustment, piezoelectric ceramic fine tuning.Laser adopts 880nm pumping source, and compared with traditional 808nm pumping source, it can reduce the thermal lensing effect of crystal effectively, improves the conversion efficiency of laser; Laser adopts ring cavity structure, and running is efficient, stable.
Claims (9)
1. an all solid state single frequency tunable red laser, comprise laser diode (1), pump light orthopedic systems (3), resonant cavity, gain media (8), frequency-doubling crystal (11), magneto-optic isolator and frequency tuning devices, it is characterized in that: described laser diode (1) is connected with pump light orthopedic systems (3) by optical fiber (2), the longitudinal pumping of hot spot after pump light orthopedic systems (3) shaping is on gain media (8), and the fluorescence that gain media (8) is inspired infrared band enters resonant cavity; Described resonant cavity forms " 8 " word ring cavity structure by pump light input end face mirror (4), planar cavity mirror (5), concave surface chamber mirror (6) and concave surface output cavity mirror (7); Pump light input end face mirror (4), planar cavity mirror (5) and laser diode (1), pump light orthopedic systems (3) are in same light path, concave surface chamber mirror (6) is arranged at pump light input end face mirror (4) below, concave surface output cavity mirror (7) is arranged at planar cavity mirror (5) below, and pump light input end face mirror (4) is arranged between pump light orthopedic systems (3) and gain media (8) with inclination angle; Described magneto-optic isolator is made up of Faraday rotator (9) and 1/2nd wave plates (10); Faraday rotator (9) and 1/2nd wave plates (10) are arranged between pump light input end face mirror (4) and planar cavity mirror (5), and are in same light path; Described frequency tuning devices is made up of F-P etalon (12) and piezoelectric ceramic (13); F-P etalon (12) is arranged between concave surface chamber mirror (6) and concave surface output cavity mirror (7), and is in same light path; Piezoelectric ceramic (13) is fixed on the side of planar cavity mirror (5) away from 1/2nd wave plates (10); Described frequency-doubling crystal (11) is arranged at the laser beam waist position between concave surface chamber mirror (6) and concave surface output cavity mirror (7), and is in F-P etalon (12) right side.
2. all solid state single frequency tunable red laser of one according to claim 1, is characterized in that: described pump light orthopedic systems (3) is made up of GRIN Lens (14), concave mirror (15), cylindrical mirror (16) and condenser lens (17) from left to right successively; The concave surface facing cylindrical mirror (16) of concave mirror (15), the cylinder of cylindrical mirror (16) and condenser lens (17) is oppositely arranged.
3. all solid state single frequency tunable red laser of one according to claim 1, it is characterized in that: described Faraday rotator (9) is arranged at the side near pump light input end face mirror (4), 1/2nd wave plates (10) are arranged at the side near planar cavity mirror (5).
4. all solid state single frequency tunable red laser of one according to claim 1, it is characterized in that: described concave surface chamber mirror (6) and concave surface output cavity mirror (7) are arranged at same light path with inclination angle, and the concave surface facing planar cavity mirror (5) in concave surface chamber mirror (6), the concave surface facing pump light input end face mirror (4) of concave surface output cavity mirror (7).
5. all solid state single frequency tunable red laser of one according to claim 1, is characterized in that: described pump light input end face mirror (4), planar cavity mirror (5), concave surface chamber mirror (6) and concave surface output cavity mirror (7) are to oscillating laser 1342nm total reflection.
6. all solid state single frequency tunable red laser of one according to claim 1, is characterized in that: described input end face mirror (4) is coated with 880nm high permeability film near the one side of pump light orthopedic systems (3).
7. all solid state single frequency tunable red laser of one according to claim 1, is characterized in that: the concave surface of described concave surface output cavity mirror (7) is coated with 671nm ruddiness high permeability film.
8. all solid state single frequency tunable red laser of one according to claim 1, is characterized in that: described gain media (8) is YVO
4-Nd:YVO
4bonded crystals, the both ends of the surface of gain media (8) all plate 880nm antireflective film, 1342nm antireflective film and 1064nm antireflective film.
9. all solid state single frequency tunable red laser of one according to claim 1, is characterized in that: described frequency-doubling crystal (11) adopts the lbo crystal cut in I class angle automatching mode, and both ends of the surface are all coated with the double-colored anti-reflection film of 1342nm and 671nm.
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Cited By (9)
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| CN104733992A (en) * | 2015-04-02 | 2015-06-24 | 山西大学 | High-power inner cavity frequency doubling single-frequency laser device |
| CN104810713A (en) * | 2015-04-01 | 2015-07-29 | 中国科学院理化技术研究所 | Unidirectional operation ring cavity internal double-pass nonlinear variable frequency laser device |
| CN107195324A (en) * | 2017-07-27 | 2017-09-22 | 山西大学 | A kind of high efficiency quantum storing device of continuous variable non-classical optical state |
| CN107579413A (en) * | 2017-09-21 | 2018-01-12 | 山西大学 | A kind of method for extending all-solid-state continuous wave single-frequency laser tuning range |
| CN108923244A (en) * | 2018-08-09 | 2018-11-30 | 核工业理化工程研究院 | The continuous light annular chamber frequency doubling system of single-frequency and frequency locking method |
| CN111244746A (en) * | 2020-01-14 | 2020-06-05 | 中国科学院福建物质结构研究所 | Laser system |
| CN111969403A (en) * | 2020-09-01 | 2020-11-20 | 山西大学 | Watt-level continuous single-frequency all-solid-state laser |
| CN113394649A (en) * | 2020-03-13 | 2021-09-14 | 核工业理化工程研究院 | 1342nm single-frequency continuous light straight cavity amplifier, amplifying system and light amplifying method thereof |
| WO2022264791A1 (en) * | 2021-06-14 | 2022-12-22 | 国立大学法人東海国立大学機構 | Wavelength-tunable laser device |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104810713A (en) * | 2015-04-01 | 2015-07-29 | 中国科学院理化技术研究所 | Unidirectional operation ring cavity internal double-pass nonlinear variable frequency laser device |
| CN104810713B (en) * | 2015-04-01 | 2017-09-19 | 中国科学院理化技术研究所 | Unidirectional annular chamber intracavitary round trip additive mixing laser |
| CN104733992A (en) * | 2015-04-02 | 2015-06-24 | 山西大学 | High-power inner cavity frequency doubling single-frequency laser device |
| CN107195324A (en) * | 2017-07-27 | 2017-09-22 | 山西大学 | A kind of high efficiency quantum storing device of continuous variable non-classical optical state |
| CN107579413A (en) * | 2017-09-21 | 2018-01-12 | 山西大学 | A kind of method for extending all-solid-state continuous wave single-frequency laser tuning range |
| CN107579413B (en) * | 2017-09-21 | 2019-02-26 | 山西大学 | A method of extension all-solid-state continuous wave single-frequency laser tuning range |
| CN108923244A (en) * | 2018-08-09 | 2018-11-30 | 核工业理化工程研究院 | The continuous light annular chamber frequency doubling system of single-frequency and frequency locking method |
| CN111244746A (en) * | 2020-01-14 | 2020-06-05 | 中国科学院福建物质结构研究所 | Laser system |
| CN113394649A (en) * | 2020-03-13 | 2021-09-14 | 核工业理化工程研究院 | 1342nm single-frequency continuous light straight cavity amplifier, amplifying system and light amplifying method thereof |
| CN111969403A (en) * | 2020-09-01 | 2020-11-20 | 山西大学 | Watt-level continuous single-frequency all-solid-state laser |
| WO2022264791A1 (en) * | 2021-06-14 | 2022-12-22 | 国立大学法人東海国立大学機構 | Wavelength-tunable laser device |
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