CN108123355B - A kind of laser system of Wavelength tunable - Google Patents
A kind of laser system of Wavelength tunable Download PDFInfo
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- CN108123355B CN108123355B CN201711391237.7A CN201711391237A CN108123355B CN 108123355 B CN108123355 B CN 108123355B CN 201711391237 A CN201711391237 A CN 201711391237A CN 108123355 B CN108123355 B CN 108123355B
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- reflecting mirror
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- gain medium
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
- H01S3/0941—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a laser diode
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/102—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling the active medium, e.g. by controlling the processes or apparatus for excitation
- H01S3/1026—Controlling the active medium by translation or rotation, e.g. to remove heat from that part of the active medium that is situated on the resonator axis
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- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Lasers (AREA)
Abstract
The present invention relates to a kind of laser systems of Wavelength tunable, including profile pump device, the laser gain medium being placed in inside profile pump device, the first reflecting mirror placed along transverse direction, second reflecting mirror and third reflecting mirror arranged in parallel, the outgoing mirror placed in a longitudinal direction；Profile pump device is equipped with semiconductor laser diode, the pump light directive laser gain medium that semiconductor laser diode issues；Profile pump device is equipped with the first opening and the second opening, and flaky laser gain medium has orthogonal first straight seamed edge and the second straight seamed edge；Along longitudinal projection, the first straight seamed edge is fallen in the range of the first opening, and the first opening is fallen in the range of the first reflecting mirror；Along transverse projection, the second straight seamed edge is fallen in the range of the second opening, and the second opening is fallen in the range of the second reflecting mirror.Laser system of the invention is compact-sized, small in size, line width, Wavelength tunable, belongs to laser technology field.
Description
Technical field
The present invention relates to laser technology field more particularly to a kind of laser systems of Wavelength tunable.
Background technique
Currently, the first is by certain elements (such as grating, color there are mainly two types of the methods of realization optical maser wavelength tuning
Dissipate prism etc.) change wavelength corresponding to resonant cavity low-loss area to change the wavelength of laser, second is certain by changing
External parameter (such as magnetic field, temperature) makes the energy shift of laser transition.These methods have the characteristics that one it is common, be exactly necessary
It adds additional instrument or element and realizes Wavelength tunable, not only increase the cost of laser system, also add the damage of resonant cavity
Consumption, so that system becomes complicated and unstable.
Summary of the invention
For the technical problems in the prior art, the object of the present invention is to provide it is a kind of it is compact-sized, small in size,
The laser system of the Wavelength tunable of line width.
In order to achieve the above object, the present invention adopts the following technical scheme:
A kind of laser system of Wavelength tunable, including profile pump device, the laser gain being placed in inside profile pump device are situated between
Matter, along the first reflecting mirror that transverse direction is placed, the second reflecting mirror and third reflecting mirror arranged in parallel, along longitudinal direction
The outgoing mirror that direction is placed；The angle of second reflecting mirror and the first reflecting mirror is 45 °, and the angle of the second reflecting mirror and outgoing mirror is
45°；Profile pump device is equipped with semiconductor laser diode, and the pump light directive laser gain that semiconductor laser diode issues is situated between
Matter；Profile pump device is equipped with the first opening and the second opening, and flaky laser gain medium has orthogonal first
Straight seamed edge and the second straight seamed edge；Along longitudinal projection, the first straight seamed edge is fallen in the range of the first opening, and the first opening falls in the
In the range of one reflecting mirror；Along transverse projection, the second straight seamed edge is fallen in the range of the second opening, and the second opening falls in second
In the range of reflecting mirror.
Further, profile pump device includes water-cooling subbase, cooling piece, crystal gasket, crystal tabletting, pumping lid, half
Conductor Laser diode；The upper surface of water-cooling subbase is equipped with groove, and cooling piece is embedded in groove, and crystal gasket is mounted on water cooling
The upper surface of pedestal, laser gain medium are placed on the upper surface of crystal gasket, the shape and laser gain medium of crystal tabletting
Shape be adapted, the crystal tabletting for compressing laser gain medium edge is fixed on crystal gasket, hollow pumping lid
It is covered with the surrounding of crystal gasket, semiconductor laser diode is mounted on the top of pumping lid；It pumps and is set on the side covered
There is the first opening, another side for pumping lid is equipped with the second opening, where the side and the second opening where the first opening
Side be mutually perpendicular to.
Further, the inside of water-cooling subbase is equipped with U-shaped water circulation channel.
Further, being equipped with indium foil between the lower surface of laser gain medium and the upper surface of crystal gasket.
Further, pumping lid lower end is surrounded by bolt hole, crystal gasket is surrounded by through-hole, water-cooling subbase
Upper surface is surrounded by bolt hole；Pumping lid, crystal gasket, water-cooling subbase are screwed together by bolt.
Further, profile pump device further includes heat-sensitive sensor, a side of crystal gasket is equipped with notch, heat
Dependent sensor is mounted in the notch of crystal gasket.
Further, laser system further includes displacement platform, profile pump device is mounted on displacement platform.
Further, being coated on the first reflecting mirror, the second reflecting mirror, third reflecting mirror anti-to pump light and fundamental frequency light
The first medium film penetrated is coated on outgoing mirror to pump light reflection, to the second medium film of fundamental frequency light part projection.
Further, the inside of a part insertion pumping lid of semiconductor laser diode, semiconductor laser diode
Pumping is bolted on to cover.
Generally speaking, the present invention has the advantage that
Laser gain medium is processed into Perrin-cloth Rocca prism shape by the present invention, does not need additionally to add optics member
Part can be achieved with the laser output of tunable and narrow tape；By the way of profile pump device, thermal lensing effect is effectively reduced
It influences, laser output stability is high；Compact overall structure, the mode for adjusting Output of laser wavelength is simple, passes through rotating side face-pumping
Pu device.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of this laser system.
Fig. 2 is that the light of specific wavelength passes through the schematic diagram of laser gain medium.
Fig. 3 is that the light of two beam different wave lengths passes through the schematic diagram of laser gain medium.
Fig. 4 is the explosive view of profile pump device.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be further described in detail.
It is now attached to what is occurred in Figure of description for the ease of uniformly checking each appended drawing reference inside Figure of description
Icon note is unitedly described as follows:
1 is laser gain medium, and 2 be profile pump device, and 3 be the first reflecting mirror, and 4 be the second reflecting mirror, and 5 reflect for third
Mirror, 6 be outgoing mirror, and 101 be the first straight seamed edge, and 102 be the second straight seamed edge, and 201 be water-cooling subbase, and 202 be cooling piece, and 203 are
Crystal gasket, 204 be crystal tabletting, and 205 be pumping lid, and 206 be semiconductor laser diode, and 207 be water circulation channel, 208
It is the groove of water-cooling subbase for the first opening, 209,210 be the notch of crystal gasket.
For sake of convenience, now hereafter described direction is provided as follows: the hereafter left and right in described transverse direction i.e. Fig. 1
Direction, the hereafter up and down direction in described longitudinal direction, that is, Fig. 1.
In conjunction with shown in Fig. 1 to Fig. 4, a kind of laser system of Wavelength tunable, including profile pump device, laser gain medium,
First reflecting mirror, the second reflecting mirror, third reflecting mirror, outgoing mirror.Laser gain medium is placed in the inside of profile pump device, and first
Reflecting mirror is placed along transverse direction, and the second reflecting mirror and third reflecting mirror are parallel to each other, and the second reflecting mirror is located at third reflection
The top of mirror, outgoing mirror are placed in a longitudinal direction.
As shown in connection with fig. 1, the second reflecting mirror and third mirror tilt are placed, and tilt angle is 45 °, i.e., and in Fig. 1
The angle of horizontal plane is 45 °.The angle of second reflecting mirror and the first reflecting mirror is 45 °, the angle of the second reflecting mirror and outgoing mirror
It is 45 °.Profile pump device is equipped with semiconductor laser diode, the pump light directive laser gain that semiconductor laser diode issues
Medium.Profile pump device is equipped with the first opening and the second opening, and flaky laser gain medium has orthogonal the
One straight seamed edge and the second straight seamed edge.Along longitudinal projection, i.e., viewed from above in Fig. 1, the first straight seamed edge falls in the first opening
In the range of, the first opening is fallen in the range of the first reflecting mirror.Along transverse projection, i.e., in Fig. 1, see from left to right, the
Two straight seamed edges are fallen in the range of the second opening, and the second opening is fallen in the range of the second reflecting mirror.It can guarantee laser in this way
Gain matrix generate laser pass through first opening and the first reflecting mirror of directive, pass through second opening and the second reflecting mirror of directive.
As shown in connection with fig. 4, profile pump device includes water-cooling subbase, cooling piece, crystal gasket, crystal tabletting, pumping lid, half
Conductor Laser diode.The upper surface of water-cooling subbase is equipped with groove, and cooling piece is embedded in groove, and cooling piece is placed in groove
Afterwards, the upper surface of cooling piece and the upper surface of water-cooling subbase are concordant.As shown in connection with fig. 4, crystal gasket is mounted on water-cooling subbase
Upper surface, laser gain medium are disposed horizontally in the upper surface of crystal gasket, the shape and laser gain medium of crystal tabletting
Shape be adapted, the crystal tabletting for compressing laser gain medium edge is fixed on crystal gasket；That is crystal tabletting
Chamfered shape will match with laser gain medium, and crystal tabletting can be hollow or have opening port, and crystal tabletting is pressing against
Then crystal tabletting is fixed on crystal gasket by the profile of laser gain medium with screw.Hollow pumping lid is covered with crystal
The edge contour of the surrounding of gasket, i.e. pumping lid lower end is pressing against the edge of crystal gasket, and semiconductor laser diode is mounted on pump
The top of Pu lid.It pumping the side covered and is equipped with the first opening, another side for pumping lid is equipped with the second opening,
The side where side and the second opening where first opening is mutually perpendicular to, and the two sides are adjacent.
The inside of water-cooling subbase is equipped with U-shaped water circulation channel.It is passed through cooling water to the inside of water-cooling subbase, can be taken away
Heat, cooling water reduces the temperature of cooling piece, and then reduces the temperature of crystal gasket and laser gain medium, so that laser
The operating temperature of gain media is in optimum state.
Indium foil is equipped between the lower surface of laser gain medium and the upper surface of crystal gasket.Indium foil is a kind of very soft
Material, due to some factors, the lower surface of laser gain medium might not be very smooth, therefore can be on the ground of out-of-flatness
Upper indium foil pads in side, so as to which laser gain medium is kept good planarization.
Pumping lid lower end is surrounded by bolt hole, and crystal gasket is surrounded by through-hole, and the four of water-cooling subbase upper surface
Week is equipped with bolt hole；Pumping lid, crystal gasket, water-cooling subbase are screwed together by bolt.
Profile pump device further includes heat-sensitive sensor, and a side of crystal gasket is equipped with notch, heat-sensitive sensor peace
In the notch of crystal gasket.Heat-sensitive sensor can detecte temperature information, so as to know laser gain medium
Operating temperature.
Laser system further includes displacement platform, and profile pump device is mounted on displacement platform.Displacement platform is accurate displacement platform, is led to
Laser gain medium can be rotated by crossing precision displacement table, to change some straight seamed edge of laser gain medium and the folder of laser beam
Angle.
First reflecting mirror, the second reflecting mirror are coated on third reflecting mirror and are situated between to the first of pump light and fundamental frequency light reflection
Plasma membrane is coated on outgoing mirror to pump light reflection, to the second medium film of fundamental frequency light part projection.That is the first reflecting mirror, second
First medium film on reflecting mirror, third reflecting mirror all has high reflection to pump light and fundamental frequency light.Second on outgoing mirror is situated between
For plasma membrane to pump light high reflection, the second medium film on outgoing mirror projects fundamental frequency light part.
The inside of a part insertion pumping lid of semiconductor laser diode, semiconductor laser diode are bolted
It is covered in pumping.
The working principle of this laser system: semiconductor laser diode launches pump light, and then pump light is covered from pumping
Hollow part pass through, be then irradiated on laser gain medium so that laser gain medium generate fundamental frequency light, laser increase
The fundamental frequency light that beneficial medium generates is divided into two-way:
The first via: fundamental frequency light a part that laser gain medium generates comes out from the first straight seamed edge, then from the first opening
Out, on the first reflecting mirror, the first reflecting mirror reflects fundamental frequency light (anti-straight up vertical irradiation (irradiating straight down)
Penetrate), then fundamental frequency light enters the first opening again, and injects laser gain medium from the first straight seamed edge, and laser gain medium has
Dispersion interaction, fundamental frequency light from the second straight seamed edge of laser gain medium come out after, only the light of specific wavelength just can be with transverse direction
Direction (horizontal direction in Fig. 1) is radiated on the second reflecting mirror (since the light of other wavelength is radiated at transverse direction
On second reflecting mirror, therefore, the light of other wavelength cannot be more back and forth in the first reflecting mirror, the second reflecting mirror, third reflecting mirror
Secondary reflection), then the light of the specific wavelength is radiated at vertically on third reflecting mirror, then the light level irradiation of the specific wavelength
On outgoing mirror, then a part (such as: transmissivity 10%) of the light of the specific wavelength is transmitted away from outgoing mirror and (is worn
Cross outgoing mirror)；The rest part of the light of the specific wavelength repeatedly recycles back and forth along original optical path, is often radiated on outgoing mirror, the spy
The long light of standing wave it is total some pass through outgoing mirror.Semiconductor laser diode continuously sends out pump light, then laser is increased
Beneficial medium persistently generates fundamental frequency light, and in the optical path, only the luminous energy of specific wavelength is multiple defeated from outgoing mirror back and forth for fundamental frequency light
Out, therefore, the light of the specific wavelength only can be increasingly stronger.It should be noted that the light of the specific wavelength refer to it is a certain specific
Determine the pole close limit of value, such as: the luminous energy near wavelength 1030nm is exported from outgoing mirror.
Second tunnel: the another part for the fundamental frequency light that laser gain medium generates comes out from the second straight seamed edge, then from second
Opening comes out, and is then laterally radiated on the second reflecting mirror, is longitudinally radiated on third reflecting mirror, is then laterally radiated at output
On mirror, but only the luminous energy of some comes out from outgoing mirror, remaining fundamental frequency light is returned along original optical path, when fundamental frequency light is irradiated
After the straight seamed edge of laser gain medium, dispersion phenomenon can be generated, then only the luminous energy of specific wavelength is longitudinally radiated at
On one reflecting mirror.Therefore, laser gain medium generate fundamental frequency light from the second straight seamed edge come out after, and pass through laser gain
After chromatic dispersion effects of medium, only the luminous energy of specific wavelength recycles back and forth in multiple times in the optical path, therefore has more next
The light of more specific wavelengths passes through outgoing mirror.
Laser gain medium is processed into the shape of dispersing prism by the present invention, such as Perrin-cloth Rocca prism.Perrin-Bu Luo
Card prism be with inventor, the naming of French instrument manufacturers Perrin and Bu Rocca.As shown in connection with fig. 2, prism quilt
The square of 4 planes is fashioned into, each correct angle in side is 90 °, 75 °, 135 ° and 60 °.Light is by 90 ° and 75 ° of straight rib
Side is incident, is totally reflected from 75 ° and 135 ° of contained sides, then leaves prism from the straight seamed edge of 90 ° and 60 °.To the light of specific wavelength,
After prism, 90 ° can be correctly deflected.Such as: as shown in connection with fig. 3, there are the two of wavelength 1020nm and wavelength 1040nm
Shu Guang is radiated in the first straight seamed edge with horizontal direction, and after prism, the light beam of wavelength 1020nm can be radiated at defeated vertically
In appearance, and the light beam of wavelength 1040nm from prism come out after, then be obliquely radiated on outgoing mirror；But if slightly by prism
The suitable angle of micro- rotation, i.e., rationally change the angle of the first straight seamed edge and horizontal direction, then the light beam of wavelength 1040nm is from rib
After mirror comes out, it can be radiated on outgoing mirror vertically, the light beam of wavelength 1020nm is then obliquely radiated on outgoing mirror instead.It wears
Lin-cloth Rocca prism is used as dispersing prism, and the refractive index difference of different wave length laser in the prism is amplified by dispersion interaction, specific
The light of wavelength can not escaped out (in entire optical path) in resonant cavity back and forth by prism, and the light of remaining wavelength is due to deviation
It is lost excessive and is unable to resonance.Therefore, Perrin-cloth Rocca prism shape laser gain medium can be used for making narrow linewidth
Laser system.Laser gain medium, profile pump device, the first reflecting mirror, the second reflecting mirror, third reflecting mirror, outgoing mirror composition
Resonant cavity and the condition for meeting stable cavity.
The method that the present invention realizes the narrow band laser system of Wavelength tunable is: by Perrin-cloth Rocca prism shape laser
Gain media is placed in profile pump device.Using precision displacement table, laser gain medium is rotated, changes optical path and laser gain is situated between
The angle of upright seamed edge.Optical path is different from the angle of laser gain medium straight seamed edge, and different wave length laser is in laser gain medium
In refractive index difference by Perrin-cloth Rocca prism dispersion interaction amplify, allow the specific wavelength of resonance also different, repercussions
It is long to be unable to resonance since deviation loss is excessive, obtain the laser of narrowband output of Wavelength tunable.Second reflecting mirror and third reflection
Mirror is turned back optical path twice, and loss of the augmenting portion wavelength in resonant cavity, the wave-length coverage for allowing to resonance is narrower, only special
Wavelength in the long pole close limit nearby of standing wave can be with resonance.
It is 10mm that the present invention, which can select right angle long side, and right angle short side is 8mm, remaining 3 angle is respectively 75 °, 135 °,
60 °, with a thickness of 4mm, Perrin-cloth Rocca prism shape, the YAG for mixing trivalent ytterbium ion concentration and being 5% with wide emission spectrum
(yag crystal) crystal is as laser gain medium.Selecting launch wavelength is two pole of semiconductor laser near 978nm
Pipe array, pump light maximum power output are 80W.First reflecting mirror, the second reflecting mirror, the deielectric-coating pair plated on third reflecting mirror
Pump light (978nm) and fundamental frequency light (1010-1050nm) all high reflections, the deielectric-coating plated on outgoing mirror is to pump light (978nm)
High reflection transmits fundamental frequency light (1010-1050nm) 10%.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, other any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the present invention,
It should be equivalent substitute mode, be included within the scope of the present invention.
Claims (7)
1. a kind of laser system of Wavelength tunable, it is characterised in that: including profile pump device, be placed in swashing inside profile pump device
Optical gain medium, along transverse direction place the first reflecting mirror, the second reflecting mirror and third reflecting mirror arranged in parallel,
The outgoing mirror placed in a longitudinal direction；The angle of second reflecting mirror and the first reflecting mirror is 45 °, the second reflecting mirror and outgoing mirror
Angle be 45 °；Profile pump device is equipped with semiconductor laser diode, and the pump light directive that semiconductor laser diode issues swashs
Optical gain medium；Profile pump device is equipped with the first opening and the second opening, and flaky laser gain medium, which has, mutually to hang down
Straight the first straight seamed edge and the second straight seamed edge；Along longitudinal projection, the first straight seamed edge is fallen in the range of the first opening, and first opens
Mouth is fallen in the range of the first reflecting mirror；Along transverse projection, the second straight seamed edge is fallen in the range of the second opening, the second opening
It falls in the range of the second reflecting mirror；
Profile pump device includes water-cooling subbase, cooling piece, crystal gasket, crystal tabletting, pumping lid, semiconductor laser diode；
The upper surface of water-cooling subbase is equipped with groove, and cooling piece is embedded in groove, and crystal gasket is mounted on the upper surface of water-cooling subbase, swashs
Optical gain medium is placed on the upper surface of crystal gasket, and the shape of crystal tabletting and the shape of laser gain medium are adapted, use
It is fixed on crystal gasket in the crystal tabletting for compressing laser gain medium edge, hollow pumping is covered with the four of crystal gasket
Week, semiconductor laser diode are mounted on the top of pumping lid；It pumps the side covered and is equipped with the first opening, pumping lid
Another side be equipped with second opening, first opening where side and second opening where side be mutually perpendicular to, and
The two sides are adjacent；
Laser system further includes displacement platform, and profile pump device is mounted on displacement platform, can rotate laser gain by displacement platform
Medium, to change some straight seamed edge of laser gain medium and the angle of laser beam.
2. a kind of laser system of Wavelength tunable described in accordance with the claim 1, it is characterised in that: the inside of water-cooling subbase is equipped with
U-shaped water circulation channel.
3. a kind of laser system of Wavelength tunable described in accordance with the claim 1, it is characterised in that: the following table of laser gain medium
Indium foil is equipped between face and the upper surface of crystal gasket.
4. a kind of laser system of Wavelength tunable described in accordance with the claim 1, it is characterised in that: the surrounding of pumping lid lower end is set
There is bolt hole, crystal gasket is surrounded by through-hole, and water-cooling subbase upper surface is surrounded by bolt hole；Pumping lid, crystal pad
Piece, water-cooling subbase are screwed together by bolt.
5. a kind of laser system of Wavelength tunable described in accordance with the claim 1, it is characterised in that: profile pump device further includes heat
One side of dependent sensor, crystal gasket is equipped with notch, and heat-sensitive sensor is mounted in the notch of crystal gasket.
6. a kind of laser system of Wavelength tunable described in accordance with the claim 1, it is characterised in that: the first reflecting mirror, second are instead
It penetrates mirror, be coated with the first medium film to pump light and fundamental frequency light reflection on third reflecting mirror, be coated on outgoing mirror to pump light
Reflection, the second medium film that fundamental frequency light part is projected.
7. a kind of laser system of Wavelength tunable described in accordance with the claim 1, it is characterised in that: semiconductor laser diode
The inside of a part insertion pumping lid, semiconductor laser diode are bolted on pumping and cover.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711391237.7A CN108123355B (en) | 2017-12-21 | 2017-12-21 | A kind of laser system of Wavelength tunable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711391237.7A CN108123355B (en) | 2017-12-21 | 2017-12-21 | A kind of laser system of Wavelength tunable |
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| CN108123355A CN108123355A (en) | 2018-06-05 |
| CN108123355B true CN108123355B (en) | 2019-05-14 |
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| US7376160B2 (en) * | 2003-11-24 | 2008-05-20 | Raytheon Company | Slab laser and method with improved and directionally homogenized beam quality |
| CN102709799B (en) * | 2012-06-18 | 2016-01-20 | 天津奇谱光电技术有限公司 | A kind of broadband continuous tunable frequency-stabilized laser |
| CN102820611B (en) * | 2012-09-05 | 2014-06-04 | 天津奇谱光电技术有限公司 | Tunable laser for outputting non-polarized light |
| CN103825195A (en) * | 2014-01-02 | 2014-05-28 | 重庆师范大学 | Broadband tunable light parameter oscillator pumping by use of vertical external cavity surface emitting laser |
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