CN209418972U - A kind of tunable micro-slice laser of 1342nm - Google Patents
A kind of tunable micro-slice laser of 1342nm Download PDFInfo
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- CN209418972U CN209418972U CN201920371751.2U CN201920371751U CN209418972U CN 209418972 U CN209418972 U CN 209418972U CN 201920371751 U CN201920371751 U CN 201920371751U CN 209418972 U CN209418972 U CN 209418972U
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Abstract
The utility model discloses a kind of tunable micro-slice lasers of 1342nm, including shell, the intracorporal 880nmLD pumping source of the shell and laser crystal is arranged in coaxial spaced, and pumping source refrigeration mechanism and laser crystal refrigeration mechanism, pumping source enters in the laser crystal from front surface a face-pumping to be exported from the face rear surface b, the face the front surface a plating 880nm and 1064nm anti-reflection film and 1342nm high-reflecting film of the laser crystal, the face rear surface b plating 1064nm, 880nm anti-reflection film and 1342nm transflection film of crystal.The 1342nm micro-slice laser of the utility model has the characteristics that single longitudinal mode, narrow linewidth, frequency-tunable, high light beam quality, because of chamber length, only uses the hysteroscope of two end faces as resonant cavities of crystal that single longitudinal mode output can be realized, structure is simple, convenient for tuning.Crystal temperature effect is controlled with semiconductor chilling plate TEC, laser can be realized in the continuously adjustable of a small range, frequency stabilization, no Mode-hopping Phenomena.
Description
Technical field
The utility model belongs to field of laser device technology, and in particular to a kind of tunable micro-slice laser of 1342nm.
Background technique
Single-frequency laser has many advantages, such as single longitudinal mode, narrow linewidth, frequency stabilization, high light beam quality, is widely used in laser
The fields such as radar, laser medicine, optical communication, environmental monitoring.And micro-slice laser because chamber length, it is compact-sized the features such as, be
Obtain a kind of main path of single-frequency laser.
In semiconductor pumped microchip intracavity frequency doubling laser, common micro-slice laser comprising laser gain
Medium, such as Nd:YVO4 and the frequency doubling non-linear's crystal for meeting Type II phase-matching condition, as KTP and front and back chamber film S1,
S2, since endovenous laser longitudinal mode is competed with pump light intensities and temperature change, to keep longitudinal mode in laser cavity continuous
Jump, therefore usually moment generates transition to the frequency multiplication optical power of its output.In practical applications, it is often desirable that output frequency doubled light function
Rate has more gentle consecutive variations with pumping current or temperature, the largely shadow of power jump problem existing for intracavity frequency doubling laser
The application of this microchip structure intracavity frequency doubling device is rung.
Micro-slice laser is a kind of laser device with solid micro cavity configuration, and typical structure is by various membrane systems point
It is not plated on two light passing end faces of gain media, two end faces of crystal are the front and back Cavity surface for constituting resonant cavity, are formed miniature
Vibrate chamber.The crystal thickness of micro-slice laser is only very short in several millimeter magnitudes, that is, the optical length of resonant cavity, thus
The longitudinal mode spacing for capableing of starting of oscillation is increased, then realizes that single longitudinal mode exports by the limitation of the gain curve of optical gain medium.
But the existing general power of micro-slice laser is smaller, power only number milliwatts or ten number milliwatts are not able to satisfy nuclear industry neck
The experiment requirement in domain.
Utility model content
The purpose of the utility model is to overcome the deficiencies in the prior art, provide a kind of tunable microchip laser of 1342nm
Device has the characteristics that the tunable micro-slice laser of 1342nm of single longitudinal mode, narrow linewidth, frequency-tunable, high light beam quality.
The utility model is achieved through the following technical solutions:
A kind of tunable micro-slice laser of 1342nm, including shell, it is intracorporal that the shell is arranged in coaxial spaced
880nmLD pumping source and laser crystal and pumping source refrigeration mechanism and laser crystal refrigeration mechanism, pumping source is from front surface a
Face-pumping enters in the laser crystal to be exported from the face rear surface b, the face front surface a of laser crystal plating 880nm and
1064nm anti-reflection film and 1342nm high-reflecting film, the face rear surface b plating 1064nm, 880nm anti-reflection film and 1342nm transflection film of crystal.
In the above-mentioned technical solutions, the laser crystal is Nd:YVO4 laser crystal.
In the above-mentioned technical solutions, the laser crystal with a thickness of 0.4mm, doping concentration 1%.
In the above-mentioned technical solutions, the laser crystal is flat column.
In the above-mentioned technical solutions, the face the rear surface b 1342nm reflectivity of laser crystal is 92%.
In the above-mentioned technical solutions, the shell and the laser crystal have been oppositely disposed light hole, described
Light hole at be provided with shaping mirror.
In the above-mentioned technical solutions, the shell and the pumping source have been oppositely disposed power supply hole, described
Power supply adapter is provided at power supply hole.
In the above-mentioned technical solutions, pumping source refrigeration mechanism includes to support pumping source described in positioning and by red copper gold
The pumping source bracket for belonging to preparation, the pumping source semiconductor chilling plate for being bonded or being inlaid in the pumping source bracket, Yi Jiyong
To carry the adjustable frames of the pumping source bracket.
In the above-mentioned technical solutions, laser crystal refrigeration mechanism includes to support laser crystal described in positioning and by purple
The crystal holer of copper metal preparation, the pumping source crystalline semiconductor refrigeration for being bonded or being inlaid in the laser crystal bracket
Piece.
In the above-mentioned technical solutions, be formed on the crystal holer with the matched positioning chamber of the laser crystal,
The bottom center of the positioning chamber is formed with perforation.
In the above-mentioned technical solutions, the distance between laser crystal and pumping source are 0.5-1.5cm.
It the advantages of the utility model and has the beneficial effect that
The 1342nm micro-slice laser of the utility model has single longitudinal mode, narrow linewidth, frequency-tunable, high light beam quality etc.
Feature only uses the hysteroscope of two end faces as resonant cavities of crystal that single longitudinal mode output can be realized because of chamber length, and structure is simple,
Convenient for tuning.Crystal temperature effect is controlled with semiconductor chilling plate TEC, laser can be realized in the continuously adjustable of a small range,
Frequency stabilization, no Mode-hopping Phenomena.The utility model pumps Nd:YVO4 laser crystal with 880nm LD pumping source, and it is mono- to obtain 80mW
Frequently tunable 1342nm laser output.
Detailed description of the invention
Fig. 1 is the mechanical structure sectional view of micro-slice laser.
Fig. 2 is the face a and b of laser crystal.
1. the peace of 3. semiconductor pumping sources of TEC cooling piece (LD) of 2. semiconductor pumping sources (LD) of semiconductor pumping sources (LD)
Fill 7. laser crystal of TEC cooling piece of 6. laser crystal of mounting seat .5. laser crystal of 4. semiconductor pumping sources of bracket (LD)
8. output light of mounting bracket 9. power supply adapter of shaping mirror, 10. laser monolithic case
It for those of ordinary skill in the art, without creative efforts, can be according to above attached
Figure obtains other relevant drawings.
Specific embodiment
In order to make those skilled in the art better understand the scheme of the utility model, combined with specific embodiments below into one
Step illustrates the technical solution of the utility model.
Embodiment one
A kind of tunable micro-slice laser of 1342nm of the utility model, including shell are co-axially located at the shell
Interior 880nmLD pumping source and laser crystal and pumping source refrigeration mechanism and laser crystal refrigeration mechanism, pumping source is from preceding table
Face a face-pumping enters in the laser crystal to be exported from the face rear surface b, and 880nm is plated in the face front surface a of the laser crystal
With 1064nm anti-reflection film and 1342nm high-reflecting film, the face rear surface b plating 1064nm, 880nm anti-reflection film and 1342nm transflection of crystal
Film.The face the rear surface b 1342nm reflectivity of laser crystal is 92%.Wherein, the transmitance of transflection film is more crucial, determines laser
The size of power output, but specifically used much transmitances and pumping source laser crystal and chamber length etc. have relationship, need to design
Optimum transmission, for example we are using 20% transmitance etc., according to the adjustment of each laser.
Transmiting membrane material, there is no limit as long as meet me to the requirement such as transmitance and face type.
Wherein, laser crystal is the gain media of laser, can go out broadband by 880nm semiconductor diode pump source excitation
Fluorescence Spectra, and the short cavity as laser, two end faces of crystal are the front and back Cavity surface for constituting resonant cavity, form micro-oscillating
Chamber.Laser crystal and pumping source spacing have optimum position, and the distance is very crucial to directly affect watt level.Guarantee to pump
Source focus predetermined position in crystal, need to test determination, generally in 1cm or so, such as 0.5-1.5cm.
Further, the laser crystal is Nd:YVO4 laser crystal, and laser crystal size is 0.4mm*7mm*5mm,
0.4mm is the thickness of laser crystal, doping concentration 1%.Pumping source uses 880nm semiconductor diode pump source 1, outgoing
The absorption line of 880nm wave band of laser, spectrum and Nd:YVO4 laser crystal is corresponding, can inspire broadband fluorescence spectrum,
880nmLD pumping effectively reduces the thermal lensing effect of crystal compared to tradition 808nmLD pumping energy.
The 1342nm micro-slice laser of the utility model has single longitudinal mode, narrow linewidth, frequency-tunable, high light beam quality etc.
Feature only uses the hysteroscope of two end faces as resonant cavities of crystal that single longitudinal mode output can be realized because of chamber length, and structure is simple,
Convenient for tuning.Crystal temperature effect is controlled with semiconductor chilling plate TEC, laser can be realized in the continuously adjustable of a small range,
Frequency stabilization, no Mode-hopping Phenomena.The utility model pumps Nd:YVO4 laser crystal with 880nm LD pumping source, and it is mono- to obtain 80mW
Frequently tunable 1342nm laser output.
Embodiment two
Specifically, the shell and the laser crystal have been oppositely disposed light hole, at the light hole
It is provided with shaping mirror, the shell and the pumping source have been oppositely disposed power supply hole, are arranged at the power supply hole
There is power supply adapter.For output light by exporting after the face the b output of laser crystal through shaping mirror 8, shaping mirror 8 can double as entire laser
Window lens, it is ensured that the closure of laser entirety makes laser from external interference, and entire laser stability increases
Add.Power supply adapter 9 and pumping source 1 are run wires to, and are mounted on laser enclosure 10, and entire laser enclosure is totally-enclosed,
Extraneous interference is avoided, guarantees the stability of laser entirety.
Embodiment three
Pumping source refrigeration mechanism includes the pumping source to support positioning described and the pumping source branch standby by red copper made of metal
Frame, the pumping source semiconductor chilling plate for being bonded or being inlaid in the pumping source bracket, and to carry the pumping
The adjustable frames of source bracket.Laser crystal refrigeration mechanism includes to support laser crystal described in positioning and by red copper metal
The crystal holer of preparation, the pumping source crystalline semiconductor cooling piece for being bonded or being inlaid in the laser crystal bracket.
Specifically, the laser crystal 5 is mounted on 1 front end of pumping source, center is contour.Laser crystal 5 is mounted on red copper
On bracket 7, semiconductor chilling plate 6 is mounted under laser crystal 5, to crystal temperature effect accurate temperature controlling.The pumping source 1 is mounted
Bracket 3 clamps, and entire bracket is made of red copper metal, and as being heat sink, rapid heat dissipation, TEC semiconductor chilling plate 2 is arranged at bottom
Carry out temperature control.Mounting bracket 3 is fixed on pedestal 4, can front and back up and down adjustment.
Whole laser enclosure uses totally-enclosed and TEC cooling piece accurate temperature controlling, makes laser not by external environment
It influences, guarantees the stability of laser entirety.Microchip crystal inherently laser cavity, so being both to cavity to the refrigeration of microplate
Refrigeration.Laser crystal 5 is mounted on red copper bracket 7, but also as heat sink, heat dissipation rapidly.Semiconductor chilling plate 6 is mounted on sharp
Under luminescent crystal 5, to crystal temperature effect accurate temperature controlling, temperature is adjusted, optical maser wavelength can be made to change, reach laser in a certain range
It can be with continuous tuning.TEC refrigeration ensure that the accurate temperature controlling long to laser medium and chamber, to ensure that laser output
Frequency stability.
The central wavelength that semiconductor pumping sources 1 export can change with the drift of temperature, and its output power also can be with
The fluctuation of operating current and fluctuate, this all will affect the stability that laser medium exports the absorption of pump light and laser.
TEC semiconductor chilling plate 2 is mounted on pumping source 1 in the following, to semiconductor accurate temperature controlling, its temperature is made to keep stablizing.1 quilt of pumping source
The mounting bracket 4 of semiconductor pumping sources (LD) clamps, and entire bracket is made of red copper metal, and as being heat sink, rapid heat dissipation, more
The stabilization of good holding temperature.The fixed LD pumping source 1 of the mounting seats 4 of semiconductor pumping sources (LD), can front and back up and down adjustment, side
Just to the efficient pumping of laser cavity.
The course of work of 1342nm micro-slice laser are as follows: inspire broadband fluorescence in the pumping to laser crystal 5 of LD pumping source 1
Spectrum, former and later two surfaces of laser crystal 5 are used as two hysteroscopes of laser resonator again, are pump coupling mirror close to pumping source 1,
Another side is laser output mirror.Two end face resonance of the fluorescence being excited through laser crystal generate 1342nm laser.Because of laser
Crystal is only 0.4mm thickness, that is, the optical length of resonant cavity is very short, so that the longitudinal mode spacing for capableing of starting of oscillation is increased, then
Realize that single longitudinal mode is exported by the limitation of the gain curve of optical gain medium.Gain curve is the attribute of crystal itself, is had
LD pumped crystal just has excitation fluorescence and comes out.Gain spectra width is certain, and the adjacent longitudinal mode spacing in spectrum increases, greatly
Only one longitudinal mode, as single longitudinal mode in breadth of spectrum line.
The chamber length of common laser chamber is 10cm or more length, and two other hysteroscopes, additional crystal at least is needed to carry out group
At laser cavity.The utility model is that there are two hysteroscopes, and only by two surface composition laser cavities of crystal itself, crystal is very thin,
Only 0.4mm, two neighboring longitudinal mode spacing is just more much larger than common lasers, does not need other any optical elements, (common to swash
Light device realizes single longitudinal mode by three optical elements at least), so that it may realize that single longitudinal mode exports.
The spatially relative terms such as "upper", "lower", "left", "right" have been used in embodiment for ease of explanation, have been used for
Relationship of the elements or features relative to another elements or features shown in explanatory diagram.It should be understood that in addition to figure
Shown in except orientation, spatial terminology is intended to include the different direction of device in use or operation.For example, if in figure
Device be squeezed, the element for being stated as being located at other elements or feature "lower" will be located into other elements or feature "upper".
Therefore, exemplary term "lower" may include both upper and lower orientation.Device, which can be positioned in other ways, (to be rotated by 90 ° or position
In other orientation), it can be interpreted accordingly used herein of the opposite explanation in space.
Moreover, the relational terms of such as " first " and " second " or the like are used merely to one with another with identical
The component of title distinguishes, without necessarily requiring or implying between these components there are any this actual relationship or
Sequentially.
Illustrative description has been done to the utility model above, it should explanation, in the core for not departing from the utility model
In the case where the heart, it is any it is simple deformation, modification or other skilled in the art can not spend creative work etc.
The protection scope of the utility model is each fallen with replacement.
Claims (10)
1. a kind of tunable micro-slice laser of 1342nm, it is characterised in that: including shell, the shell is arranged in coaxial spaced
Interior 880nmLD pumping source and laser crystal and pumping source refrigeration mechanism and laser crystal refrigeration mechanism, pumping source is from preceding table
Face a face-pumping enters in the laser crystal to be exported from the face rear surface b, and 880nm is plated in the face front surface a of the laser crystal
With 1064nm anti-reflection film and 1342nm high-reflecting film, the face rear surface b plating 1064nm, 880nm anti-reflection film and 1342nm transflection of crystal
Film.
2. the tunable micro-slice laser of a kind of 1342nm according to claim 1, it is characterised in that: the laser crystal
For Nd:YVO4 laser crystal.
3. the tunable micro-slice laser of a kind of 1342nm according to claim 1, it is characterised in that: the laser crystal
With a thickness of 0.4mm, doping concentration 1%.
4. the tunable micro-slice laser of a kind of 1342nm according to claim 1, it is characterised in that: the laser crystal
For flat column.
5. the tunable micro-slice laser of a kind of 1342nm according to claim 1, it is characterised in that: the rear table of laser crystal
The face face b 1342nm reflectivity is 92%.
6. the tunable micro-slice laser of a kind of 1342nm according to claim 1, it is characterised in that: the shell and institute
The laser crystal stated has been oppositely disposed light hole, is provided with shaping mirror at the light hole.
7. the tunable micro-slice laser of a kind of 1342nm according to claim 1, it is characterised in that: the shell and institute
The pumping source stated has been oppositely disposed power supply hole, is provided with power supply adapter at the power supply hole.
8. the tunable micro-slice laser of a kind of 1342nm according to claim 1, it is characterised in that: pumping source refrigeration mechanism
Including being bonded or being inlaid in the pump to support pumping source described in positioning and the pumping source bracket standby by red copper made of metal
Pumping source semiconductor chilling plate in the bracket of Pu source, and the adjustable frames to carry the pumping source bracket.
9. the tunable micro-slice laser of a kind of 1342nm according to claim 1, it is characterised in that: laser crystal refrigeration machine
Structure includes the laser crystal to support positioning described and the crystal holer standby by red copper made of metal, is bonded or is inlaid in and is described
Pumping source crystalline semiconductor cooling piece in laser crystal bracket.
10. the tunable micro-slice laser of a kind of 1342nm according to claim 9, it is characterised in that: the crystal branch
It is formed on frame and is formed with perforation, laser with the matched positioning chamber of the laser crystal, the bottom center of the positioning chamber
The distance between crystal and pumping source are 0.5-1.5cm.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109962399A (en) * | 2019-03-22 | 2019-07-02 | 核工业理化工程研究院 | 1342nm is tunable micro-slice laser |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109962399A (en) * | 2019-03-22 | 2019-07-02 | 核工业理化工程研究院 | 1342nm is tunable micro-slice laser |
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