CN1160836C - Miniaturized femto-second solid laser oscillator - Google Patents
Miniaturized femto-second solid laser oscillator Download PDFInfo
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- CN1160836C CN1160836C CNB011103655A CN01110365A CN1160836C CN 1160836 C CN1160836 C CN 1160836C CN B011103655 A CNB011103655 A CN B011103655A CN 01110365 A CN01110365 A CN 01110365A CN 1160836 C CN1160836 C CN 1160836C
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Abstract
The present invention relates to a solid laser oscillator, comprising a focusing lens, a laser crystal, two dual-color medium film concave reflecting mirrors for the anti-reflection of pumping laser and the total reflection of the femtosecond oscillation laser broadband, three broadband total reflecting mirrors with small angles, a vertical broadband total reflecting mirror, a planar output mirror, two quartz prisms, a climb mirror, a gold-coated mirror and a base. The present invention is cabinet in structure, narrow in outputting laser impulse width, broad in light spectrum, and simple in mode-locking start-up; the present invention has the advantages of adjustable impulse width, dual-directional output, automatic spatial dispersion compensation, easy repeated production and assemblage, high reliability, low cost, etc.
Description
Technical field
The present invention relates to laser technology field, particularly relate to a kind of solid self mode locking laser oscillator.
Background technology
In laser technology research, ultrashort laser pulse discloses the dynamic (dynamical) unique property of material transient state as the sign of the human time period that can control and in microcosmos, is one of the most popular laser research contents always.At present, people by pulse compression technique at the obtainable short pulse width of laboratory institute near 4fs (1fs=10
-15Second), its application study has been penetrated into the forefront problem of subjects such as physics, chemistry, biology, communication, and and then caused many new subjects, formation and development as subjects such as high field physics, femtochemistry, the big Capacity Optical communications of ultrahigh speed, 1999, U.S. scientist A.Zewail obtained Nobel chemistry Prize because of its initiative work with femtosecond laser research chemical reaction.Just because of the ubiquitous application of femtosecond laser, many scientists describe it and are " seeking the key of answer ".
Being used to produce the topmost technological means of ultrashort laser pulse is the laser mode locking technology.Come out so far from laser, locked mode has successively experienced main locked mode modes such as active mode locking, passive mode locking, synchronous pump locked mode, collision locked mode, coupling cavity locked mode (extra-pulse locked mode), kerr lens mode locking, used laser medium develops into the broadband solid laser material of today by initial arrowband Solid State Laser, broadband dye laser, pulsewidth in less than the time in 40 years from nanosecond (10
-15Second) magnitude proceeds to the dipped beam cycle (～3 femtosecond).But, become practical and reliable application study instrument on the real meaning of femtosecond laser, should give the credit to ti sapphire laser self mode locking technology at the beginning of the nineties, be discovery (document 1, D.E.Spence, P.N.Kean, the W.Sibbert of kerr lens technology; Opt Lett.Vol.16 (1991) 42), the appearance of this technology, not only make original femtosecond laser only the power output of tens of milliwatts improved nearly two magnitudes and reached the degree of practicality, and require to compare with traditional mode-locked laser complicated technology, its structure is almost the same with common laser simple, this revolutionary breakthrough is for femtosecond laser provides the mature technique basis to productization development.
Need and the practical and reliable achievement in research Spectra-Physics (S-P) (document 2. based on femtosecond laser application study widely
Http:// www.splasers.com/), relevant company (document 3.
Http:// www.cohcrcntinc.com/) played just exploitation as far back as 1994 and released the prism of pulsewidth femtosecond more than 100 to dispersion compensation femto second titanium precious stone laser product and Related product, though the up-to-date product output of S-P has further shortened to 35 femtoseconds again, but compare (～5fs) (document 4:GSteinmeyer with present laboratory best result, D.H.Sutter, L.Gallmann, N.Matuschek, U.Keller; Science, Vol.286 (1999) 1507), the both has bigger gap, and particularly bulky, inconvenience is moved.At these shortcomings, technology university, Austria Vienna, Switzerland industrial technology university start on the basis of mode-locking technique research at its chirped mirror compensation of dispersion technology, semiconductor saturated absorption speculum respectively in recent years, successively by registration Femtolasers Produktions GmbH company (Ao Dili) (document 5.
Http:// www.femtolasers.com/) and Time-Bandwidth company (Switzerland), (document 6.
Http:// www.timebandwidth.com/) and Related product, released the new product that volume is simplified, particularly Austrian Femtolasers Produktions GmbH company is by unique chirped mirror technology, its product pulsewidth is only about 20 femtoseconds, once be the unique utility goods less than 100 femtoseconds of pulsewidth, but this chirped mirror laser is except that cost costliness, each output parameter are difficult to unification, its locked mode is difficult for starting, pulsewidth can not be regulated, and is unfavorable for the practical operation use.
We have realized the stable mode-locking output of pulsewidth 13fs, (document 7: Wei Zhiyi, Zhang Jie, Xia Jiangfan, Feng Baohua, Zhang Xiulan, Qiu Yang in employing prism in 1997 to the chromatic dispersion compensation technique on the basis of studying the locked mode titanium precious stone laser for many years; " Chinese science " A, Vol.43 (2000) No.10), leading domestic, the international most advanced level of tool as a result.After further adopting chirped mirror, obtained the result of 8.5fs, on this basis, we are by the practicability design of innovation, and it is adjustable to succeed in developing output pulse width, the shortest novel solid femtosecond laser product model machine that reaches 18fs.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art, pass through the practicability conceptual design invented, a kind of solid self mode locked fs laser oscillator with special performance is provided, and the present invention realizes by introducing three low-angle plane of incidence broadband total reflective mirrors, also comprises: a condenser lens, a laser crystal, two concave mirrors, a vertical broadband total reflective mirror, a flat output mirror, two quartz prisms, climb a mirror and a gold-plated mirror.This invention structure compact, pulse is wide, and locked mode starts simple and easy, and it is adjustable to have pulsewidth, two-way output, compensation space chromatic dispersion automatically, the reliability height, therefore low cost and other advantages is with a wide range of applications.
The detailed technical scheme of the present invention is as follows.
As shown in Figure 1, a kind of miniaturized femto-second solid laser oscillator, comprise a condenser lens 1, a laser crystal 2, the first plano-concave total reflective mirror 3, the second plano-concave total reflective mirror 4, plane, first low-angle broadband total reflective mirror 5, plane, second low-angle broadband total reflective mirror 6, plane, the 3rd low-angle broadband total reflective mirror 7, plane, vertical broadband total reflective mirror 8, a flat output mirror 9, first quartz prism 10, second quartz prism 11, the mirror 12 of climbing, a gold-plated mirror 13 and a base plate, by the described first plano-concave total reflective mirror 3, the described second plano-concave total reflective mirror 4, plane, described first low-angle broadband total reflective mirror 5, plane, described second low-angle broadband total reflective mirror 6, plane, described the 3rd low-angle broadband total reflective mirror 7, vertical plane, broadband total reflective mirror 8 and flat output mirror 9 are formed resonant cavity, also can describedly climb mirror 12 and described gold-plated mirror 13, their purposes be to guarantee the oscillating laser bundle is climbed can be behind the segment distance from the output of resonant cavity top, according to different needs, can select plane, vertical broadband total reflective mirror 8 or flat output mirror 9 as outgoing mirror, the concrete parameter of element is as follows: base plate is of a size of 550 * 200mm, and the focal length of described condenser lens 1 is 8～13cm; Described laser crystal 2 is of a size of 4 * 4 * 5mm for the ti sapphire crystal of Brewster's angle cutting; The described first plano-concave total reflective mirror 3 is 100mm for radius of curvature, bore is 12.7mm, thickness is that the crown glass of 6mm, the described second plano-concave total reflective mirror 4 are 100mm for radius of curvature, bore is 12.7mm, thickness is the crown glass of 6mm, the concave surface of wherein said plano-concave total reflective mirror 3 is coated with the double-colored deielectric-coating of and wavelength 700～900nm total reflection anti-reflection to 532nm, and the back side is coated with the anti-reflection film of 532nm pump light; The concave surface of described plano-concave total reflective mirror 4 is coated with the broadband deielectric-coating that 700～900nm wave band is all-trans; Plane, described first low-angle broadband total reflective mirror 5, plane, described second low-angle broadband total reflective mirror 6, plane, described the 3rd low-angle broadband total reflective mirror 7 are the crown glass substrate of thickness 4mm, are coated with under 3～10 ° of incidence angles the broadband deielectric-coating to wavelength 700～900nm total reflection; Described broadband vertical plane total reflective mirror 8 is the crown glass substrate of thickness 4mm, is coated with under the vertical incidence broadband deielectric-coating to wavelength 700～900nm total reflection; Described flat output mirror 9 is the fused quartz substrate of thickness 2mm, half sheet cutting, is coated with under the vertical incidence in 750～850nm wave band transmitance and is 10% deielectric-coating; Described first prism 10, described second prism 11 for the quartz prism of Brewster's angle cutting, prism to relative distance be 54cm, the vertical device of forming 12 of climbing of described two level crossings is the gold-plated mirror of size 20 * 20mm, and described gold-plated mirror 13 is of a size of 20 * 20mm.
All element is installed on the negative, and concrete installation requirement is as follows:
The concrete parameter of element is as follows: base plate is of a size of 550 * 200mm, and the focal length of described condenser lens 1 is 8～13cm; Described laser crystal 2 is of a size of 4 * 4 * 5mm for the ti sapphire crystal of Brewster's angle cutting; The described first plano-concave total reflective mirror 3 is 100mm for radius of curvature, bore is 12.7mm, thickness is that the crown glass of 6mm, the described second plano-concave total reflective mirror 4 are 100mm for radius of curvature, bore is 12.7mm, thickness is the crown glass of 6mm, the concave surface of wherein said plano-concave total reflective mirror 3 is coated with the double-colored deielectric-coating of and wavelength 700～900nm total reflection anti-reflection to 532nm, and the back side is coated with the anti-reflection film of 532nm pump light; The concave surface of described plano-concave total reflective mirror 4 is coated with the broadband deielectric-coating that 700～900nm wave band is all-trans; Plane, described first low-angle broadband total reflective mirror 5, plane, described second low-angle broadband total reflective mirror 6, plane, described the 3rd low-angle broadband total reflective mirror 7 are the crown glass substrate of thickness 4mm, are coated with under 3～10 ° of incidence angles the broadband deielectric-coating to wavelength 700～900nm total reflection; Described broadband vertical plane total reflective mirror 8 is the crown glass substrate of thickness 4mm, is coated with the broadband deielectric-coating that under the vertical incidence wavelength 700～900nm is all-trans; Described flat output mirror 9 is the fused quartz substrate of thickness 2mm, half sheet cutting, is coated with under the vertical incidence in 750～850nm wave band transmitance and is 10% deielectric-coating; Described first prism 10, described second prism 11 for the quartz prism of Brewster's angle cutting, prism to relative distance be 54cm, the vertical device of forming 12 of climbing of described two level crossings is the gold-plated mirror of size 20 * 20mm, and described gold-plated mirror 13 is of a size of 20 * 20mm.
All element is installed on the base plate.Concrete installation requirement: described condenser lens 1 is placed on the adjusting bracket of scalable lifting and position, the left and right sides, and adjusting bracket is placed on the translation stage of 40 * 40mm, described plano-concave total reflective mirror 3 is positioned on the adjustable micropositioning stage of bidimensional, and another described plano-concave total reflective mirror 4 is positioned on the translation stage of the adjustable micropositioning stage of bidimensional and 40 * 40mm.Described laser crystal 2 is positioned on the crystal adjusting bracket and horizontal rotating table of scalable pitching and angle, the water-cooled circulation is inserted with rubber tube in the two ends of adjusting bracket, rotates described laser crystal and is placed on the common focus of described first plano-concave total reflective mirror 3 and the described second plano-concave total reflective mirror 4 with Brewster's angle.The position adjustments of described condenser lens 1 guarantees that pumping laser just focuses on the germ nucleus, plane, described vertical broadband total reflective mirror 8 and described flat output mirror 9 are placed respectively on the adjustable micropositioning stage of bidimensional, galianconism distance from described plano-concave total reflective mirror 4 to described plane total reflective mirror 8 is about 73cm, long-armed distance from described plano-concave total reflective mirror 3 to described flat output mirror 9 is 100cm, plane, described first low-angle broadband total reflective mirror 5, plane, described second low-angle broadband total reflective mirror 6, plane, described the 3rd low-angle broadband total reflective mirror 7 places respectively on the adjustable micropositioning stage of bidimensional, the described first plano-concave total reflective mirror 3, the described second plano-concave total reflective mirror 4, plane, described first low-angle broadband total reflective mirror 5, plane, described second low-angle broadband total reflective mirror 6, plane, described the 3rd low-angle broadband total reflective mirror 7, vertical plane, broadband total reflective mirror 8 and flat output mirror 9 are formed resonant cavity, plane, described first low-angle broadband total reflective mirror 5, plane, described second low-angle broadband total reflective mirror 6, the position of plane, described the 3rd low-angle broadband total reflective mirror 7 determines to guarantee that resonant cavity two brachiums are respectively 100cm and 73cm, the described device 12 of climbing places after the described flat output mirror 9, described gold-plated mirror 13 places on two micropositioning stages of laser generation light path top 5mm, on the extended line of laser long arm end (prism end), put a plane total reflective mirror in advance, install or when debugging laser generation again first like this, only need to make described first prism 10 withdraw from light path shown in Figure 1 by the outer micrometer head of rotary laser lid, can realize laser generation quickly and easily, after restoring prism once more, just be not difficult to have realized locked mode.
Two drift angles are that 69 ° first quartz prism 10, second quartz prism 11 placed and this quartz prism be opposite on the adjusting bracket and translation stage of scalable pitching and angle for Brewster's angle, the design that the translation stage of wherein said quartz prism 10 is elected vertical adjusting as, moved horizontally, its micrometer head extend to outside the laser oscillator loam cake; Regulating described plane total reflective mirror 8 and described flat output mirror 9 makes incident light rays return along former road; Making the relative distance of the described first plano-concave total reflective mirror 3, the described second plano-concave total reflective mirror 4 is 10.5～11cm, can only realize the startup and the pulse-width regulated of locked mode, change long arm end and insert quartz prism can change laser to the degree of depth of described quartz prism 10 or described quartz prism 11 output pulse width by rotating micrometer head.
Regulate described plane total reflective mirror 8 and described flat output mirror 9 incident light rays is returned along former road, then can realize the continuous oscillation of titanium precious stone laser.
Further optimize the relative position of described plano-concave total reflective mirror 4 and the focal position in the described laser crystal, that is: making the relative distance of the described first plano-concave total reflective mirror 3, the described second plano-concave total reflective mirror 4 is that 10.5～11cm (allows small difference, because the centre wavelength difference of issuable mode locking pulse), the distance of 4 of described laser crystal 2 and the described first plano-concave total reflective mirror 3, the described second plano-concave total reflective mirrors is than the inverse ratio that is the length arm.Above-mentioned steps is the cavity shape structure of regulating resonant cavity, make oscillator near locked mode district (hot spot of this moment presents strip and flashes shakiness), under the Kerr effect in described laser crystal and the acting in conjunction of corresponding cavity structure, just can realize that locked mode has turned round.Laser is from the jump to locked mode can be by means of laterally moving of described quartz prism 10 realized continuously.
Whole laser generation light path is 5cm apart from the height of base plate.
The laser pulse of output is after described mirror 12 reflections of climbing, improving about 10mm also reflects in the laser cavity top along the position that is parallel to oscillation light from described flat output mirror 9, notice that the flat output mirror 9 described in our design is half mirrors, guaranteed laser square from it entering in the laser cavity after described mirror 12 reflections of climbing like this, and through the first low-angle level crossing 5, the second low-angle level crossing 6, the 3rd low-angle level crossing 7 is secondary reflection and described first prism 10 again, after the transmission of described second prism 11, output to outside the Laser Devices by described gold-plated mirror 13 reflections, thereby reach the space dispersive strict compensation of output pulse width.
In order to produce short as far as possible light pulse, the present invention adopts a quartz prism described first quartz prism 10, second quartz prism 11 to be compensated the chromatic dispersion of laser crystal.According to the thickness of employing crystal, calculating can get the full remuneration that can realize when distance between the two prisms is 54cm (the right distance of prism can calculate by relevant document, books) crystalline dispersion, and the short pulse duration of being exported is 18 femtoseconds only.Regulate two prisms and insert the degree of light path, then can change the laser output pulse width easily.
Because the present invention adopts prism to the chromatic dispersion compensation technique,, avoided the shortcoming of (Femtolasers Produktions GmbH company product) locked mode startup difficulty in the chirped mirror scheme in conjunction with the practical design of its translation stage.
All femtosecond laser products only can be exported from an end at present.The present invention can select output easily as required owing to adopted the mirror return technique of climbing, and realizes that the two ends of femtosecond pulse are exported respectively, thereby satisfies the requirement of using, studying.The specific implementation process is: when wishing that femtosecond pulse when galianconism end (no chromatic dispersion end) is exported, adopts described flat output mirror 9 as the plane total reflective mirror, plane, described vertical broadband total reflective mirror 8 is as flat output mirror; When wishing that femtosecond pulse is from long arm end (chromatic dispersion end, that right end of prism is promptly arranged) when exporting, except that plane, described vertical broadband total reflective mirror 8 as the total reflective mirror of plane, adopt the semicircle eyeglass as 9 of flat output mirror, outside the chamber, adopt the mirror 12 of climbing again, like this after described mirror 12 reflections of climbing, femtosecond pulse will return described second quartz prism 11 by the top of half plate plane outgoing mirror 9 abreast along the vibration optical path direction, the 3rd low-angle plane total reflective mirror 7, the second low-angle plane total reflective mirror 6 and first quartz prism 10 are at last by the described gold-plated mirror 13 reflection outputs that are positioned at vibration light path top.This design is compared with the method that adds at present a pair of symmetric prisms outside the chamber again, not only saved space (only needing a pair of prism), therefore and because compensation light is parallel with oscillation light, back and forth insertion amount is identical in prism, thereby has guaranteed space dispersive strict the compensation automatically.
Laser oscillator by above-mentioned design, installation gained is measured the pulsewidth curve that can get as shown in Figure 2 through autocorrelation function analyzer.
Output laser pulse width of the present invention is narrow, short pulse duration is 18 femtoseconds only, this not only is much better than the like product of the Time-Bandwidth company (all greater than 100 femtoseconds) of S-P company (greater than 35 femtoseconds), relevant company and Switzerland, and also be only second to unique device that the Austrian Femtolasers Produktions GmbH company (the shortest 12 femtoseconds) that is shorter than 20 femtosecond products is provided at present, and pulsewidth is upwards adjustable continuously from 18 femtoseconds; Average output power is greater than 500mW.Overall structure compact of the present invention, only about 600 * 200 * 150mm of volume, though its output pulse width is slightly poorer than the product of Austrian Femtolasers Produktions GmbH company, but its volume only is about half of the said firm's product, be S-P company, relevant company product 1/3rd～4, the use so the present invention is more convenient for.At present the power output of several prods under the 5W pumping is many between 200～300mW in the world, and the present invention is under the full curing 532nm laser pumping of same power, and its locked mode average output power is greater than 500mW.The femtosecond laser product is usually owing to include prism (or chirped mirror) in the chamber, all multicomponents such as speculum, therefore first the installation, or depart from the vibration position for a certain reason need debug again the time, often complicated time-consuming, output stomidium when the present invention makes the long-armed extended line of laser do output by the galianconism end in design, make first and install or when debugging laser generation again, only need to make first prism, 10 exit opticals by the outer micrometer head of rotary laser lid, and on the long-armed extended line in device outside, put a total reflective mirror, can realize laser generation quickly and easily, and then after restoring the described quartz prism 10 of insertion again, just be not difficult to have realized locked mode, thereby guaranteed the convenience and the reliability of device.The present invention is owing to adopt the whole nation to produce element, and used dispersive compensation element is the quartz prism of standard, thus at the bottom of the cost, be easy to the duplication of production assembling.The present invention also has two-way output, automatic advantage such as compensation space chromatic dispersion, has wide application prospect, is one of best product device of combination property in the like product in the world at present.
Description of drawings
Fig. 1 is a principle of the invention structure chart,
The shortest laser pulse width curve that Fig. 2 records for the present invention,
Fig. 3 is that figure is implemented in concrete installation of the present invention,
Fig. 4 is the in kind photo of the present invention after installing.
Specific embodiment
Embodiment 1:
As shown in Figure 3, wherein each element is corresponding with Fig. 1, all is installed on the base plate that is of a size of 550 * 200mm, and concrete parameter and installation requirement that element is selected are as follows:
The focal length of described condenser lens 1 is 10cm, and bore is 2cm, and places on the adjusting bracket and translation stage of scalable lifting and position, the left and right sides.Described laser crystal 2 is of a size of 4 * 4 * 5mm for the ti sapphire crystal of Brewster's angle cutting, places on the adjusting bracket and translation stage of scalable pitching and angle.The radius of curvature of the described first plano-concave total reflective mirror 3, the described second plano-concave total reflective mirror 4 is 100mm, and bore is 12.7mm, and thickness is 6mm, and material is a crown glass, and its relative distance is about 105mm; Wherein the concave surface of the first plano-concave total reflective mirror 3 is coated with double-colored deielectric-coating anti-reflection to 532nm and that 700～900nm is all-trans, and the back side is coated with the anti-reflection film of 532nm pump light, places on the adjustable micropositioning stage of bidimensional; And the plating of the concave surface of the second plano-concave total reflective mirror 4 places on adjustable micropositioning stage of bidimensional and the translation guide rail the broadband deielectric-coating that 700～900nm wave band is all-trans.Described laser crystal 2 is positioned on the central point of the described first plano-concave total reflective mirror 3, the second plano-concave total reflective mirror 4.The position adjustments of described condenser lens 1 guarantees that pump light just focuses on the laser crystal center, its with the described first plano-concave total reflective mirror 3 apart from about 6cm.The substrate of plane, the first low-angle broadband total reflective mirror 5 under the low-angle incident, plane, second low-angle broadband total reflective mirror 6, plane, the 3rd low-angle broadband total reflective mirror 7 is bore 25.4mm, the crown glass of thickness 4mm, be coated with under 3～10 ° of incidence angles the broadband deielectric-coating of wavelength 700～900nm total reflection, place respectively on the adjustable micropositioning stage of bidimensional.Their position need guarantee to add plane total reflective mirror 8, and behind flat output mirror 9 mirrors, the length overall of resonant cavity two arms is about 110 and 70cm respectively.The substrate of described plane total reflective mirror 8 is bore 25.4mm, and the crown glass of thickness 4mm is coated with under the vertical incidence the broadband deielectric-coating of wavelength 700～900nm total reflection, places on the adjustable micropositioning stage of bidimensional.Described flat output mirror 9 is bore 25.4mm, and the fused quartz substrate of half sheet of thickness 2mm cutting is coated with under the vertical incidence in 750～850nm wave band transmitance and is 10% deielectric-coating, places on the adjustable micropositioning stage of bidimensional.First quartz prism 10, second quartz prism 11 of two Brewster's angle cuttings pressed Brewster's angle and placed, drift angle is 69 °, base size and highly be 2cm, place on the adjusting bracket and translation stage of scalable pitching and angle, the design that the translation stage of wherein said first prism 10 is elected vertical adjusting as, moved horizontally, its micrometer head extends to outside the laser loam cake.Galianconism distance from the second plano-concave total reflective mirror 4 to plane total reflective mirror 8 is about 70cm, long-armed distance from the first plano-concave total reflective mirror 3 to flat output mirror 9 is about 110cm, it is right that wherein long arm end inserts quartz prism, and the relative distance that first quartz prism is 10,11 is 54cm.Delivery outlet when the extended line of laser long-armed (prism end) is done output by the galianconism end, install or when debugging laser generation again first like this, only need to make first prism exit optical by the outer micrometer head of rotary laser lid, and on the long-armed extended line in device outside, put a total reflective mirror, can realize laser generation quickly and easily, and then behind the recovery prism, just be not difficult to have realized locked mode.Two vertical devices of forming 12 of climbing of level crossing are the broadband deielectric-coating of wavelength 700～900nm total reflection of 45 ° of incidents, after the laser pulse of output reflects via the device of climbing, also reflect in the laser cavity top along the position that is parallel to oscillation light from half outgoing mirror 9 improving about 10mm.Described gold-plated mirror 13 is of a size of 20 * 20mm, place on the bidimensional micropositioning stage of laser generation light path top 5mm, the output laser pulse that is parallel to oscillating laser is behind the secondary reflection again and the transmission of prism to first quartz prism 10, second quartz prism 11 of the first low-angle plane total reflective mirror 5, the second low-angle plane total reflective mirror 6, the 3rd low-angle plane total reflective mirror 7, meet gold-plated mirror 13 reflections and output to outside the Laser Devices, reach the space dispersive strict compensation of output pulse width.Whole laser generation light path is 5cm apart from the height of base plate.
Embodiment 2:
The concrete parameter of each element and installation are as embodiment 1, but the device of climbing selects to be of a size of the plane total reflective mirror of 700～900nm wave band 45 being spent the incident all-dielectric films that is coated with of 20 * 20mm.
Embodiment 3:
The concrete parameter of each element and installation are as embodiment 1.But adopt 9 for the plane total reflective mirror, get bore 25.4mm, the crown glass substrate of thickness 4mm is coated with under the vertical incidence broadband deielectric-coating to wavelength 700～900nm total reflection; Adopt 8 to be flat output mirror, get bore 25.4mm, the fused quartz substrate of thickness 2mm is coated with under the vertical incidence in 750～850nm wave band transmitance and is 10% deielectric-coating.Mirror 12 and gold-plated mirror 13 need not to climb this moment.
Claims (2)
1. miniaturized femto-second solid laser oscillator, it is characterized in that: comprise a condenser lens (1), a laser crystal (2), the first plano-concave total reflective mirror (3), the second plano-concave total reflective mirror (4), first low-angle broadband plane total reflective mirror (5), second low-angle broadband plane total reflective mirror (6), the 3rd low-angle broadband plane total reflective mirror (7), vertical broadband plane total reflective mirror (8), a flat output mirror (9), first quartz prism (10), second quartz prism (11), the device of climbing (12), a gold-plated mirror (13) and a base plate, the concrete parameter of element is as follows: base plate is of a size of 550 * 200mm, and the focal length of described condenser lens (1) is 80～130mm, described laser crystal (2) is of a size of 4 * 4 * 5mm for the ti sapphire crystal of Brewster's angle cutting; The described first plano-concave total reflective mirror (3), the described second plano-concave total reflective mirror (4) all are that radius of curvature is 100mm, bore is 12.7mm, thickness is the crown glass of 6mm, the concave surface of the wherein said first plano-concave total reflective mirror (3) is coated with the anti-reflection double-colored deielectric-coating that reaches the light total reflection of wavelength 700～900nm of the light of wavelength 532nm, and the back side is coated with the anti-reflection anti-reflection film of wavelength 532nm pump light; The concave surface of the described second plano-concave total reflective mirror (4) is coated with the broadband deielectric-coating to the light total reflection of wavelength 700～900nm; Described first low-angle broadband plane total reflective mirror (5), described second low-angle broadband plane total reflective mirror (6), described the 3rd low-angle broadband plane total reflective mirror (7) all are the crown glass substrates of thickness 4mm, and being coated with incidence angle is that 3～10 °, wavelength are the broadband deielectric-coating of the light total reflection of 700～900nm; Described vertical broadband plane total reflective mirror (8) is that thickness is the crown glass substrate of 4mm, and being coated with the vertical incidence wavelength is the broadband deielectric-coating of the light total reflection of 700～900nm; Described flat output mirror (9) is that thickness is the fused quartz substrate of 2mm, the cutting of half sheet, and being coated with wavelength under the vertical incidence is the light transmission rate of 750～850nm
It is 10% deielectric-coating; Described first quartz prism (10), described second quartz prism (11) for the quartz prism of Brewster's angle cutting, prism to relative distance be 54cm, the device (12) of climbing is made up of two gold-plated level crossings of mutual positioned vertical, gold-plated level crossing in the described device of climbing (12) is of a size of 20 * 20mm, and described gold-plated mirror (13) is of a size of 20 * 20mm;
All element is installed on the base plate; Concrete installation requirement: described condenser lens (1) is placed on the adjusting bracket of scalable lifting and position, the left and right sides, and adjusting bracket is placed on the translation stage of 40 * 40mm, the described first plano-concave total reflective mirror (3) is positioned on the adjustable micropositioning stage of bidimensional, and the described second plano-concave total reflective mirror (4) is positioned on the translation stage of the adjustable micropositioning stage of bidimensional and 40 * 40mm; Described laser crystal (2) is positioned on the crystal adjusting bracket and horizontal rotating table of scalable luffing angle, the water-cooled circulation is inserted with rubber tube in the two ends of adjusting bracket, rotates described laser crystal and is placed on the common focus of described first plano-concave total reflective mirror (3) and the described second plano-concave total reflective mirror (4) with Brewster's angle; The position adjustments of described condenser lens (1) guarantees that pumping laser just focuses on the germ nucleus, described vertical broadband plane total reflective mirror (8) and described flat output mirror (9) are placed respectively on the adjustable micropositioning stage of bidimensional, galianconism distance from the described second plano-concave total reflective mirror (4) to described vertical broadband plane total reflective mirror (8) is 73cm, long-armed distance from the described first plano-concave total reflective mirror (3) to described flat output mirror (9) is 100cm, or described vertical broadband plane total reflective mirror (8) is replaced by a flat output mirror, its substrate is that thickness is 2mm, the fused quartz of half sheet cutting, being coated with wavelength under the vertical incidence is that the transmitance of the light of 750～850nm is 10% deielectric-coating, described flat output mirror this moment (9) is replaced by vertical plane, a broadband total reflective mirror, its substrate is that thickness is the crown glass of 4mm, being coated with the vertical incidence wavelength is the broadband deielectric-coating that the light of 700～900nm is all-trans
But the location parameter of described vertical broadband plane total reflective mirror (8), described flat output mirror (9) is constant at this moment; Described first low-angle broadband plane total reflective mirror (5), described second low-angle broadband plane total reflective mirror (6), described the 3rd low-angle broadband plane total reflective mirror (7) places respectively on the adjustable micropositioning stage of bidimensional, the described first plano-concave total reflective mirror (3), the described second plano-concave total reflective mirror (4), described first low-angle broadband plane total reflective mirror (5), described second low-angle broadband plane total reflective mirror (6), described the 3rd low-angle broadband plane total reflective mirror (7), vertical plane, broadband total reflective mirror (8) and flat output mirror (9) are formed resonant cavity, described first low-angle broadband plane total reflective mirror (5), described second low-angle broadband plane total reflective mirror (6), the position of described the 3rd low-angle broadband plane total reflective mirror (7) determines to guarantee that resonant cavity two brachiums are respectively 100cm and 73cm, the described device of climbing (12) places described flat output mirror (9) afterwards, and described gold-plated mirror (13) places on the bidimensional micropositioning stage of laser generation light path top 5mm; Two drift angles are that 69 ° first quartz prism (10), second quartz prism (11) placed for Brewster's angle and these two quartz prisms are opposite on the adjusting bracket and translation stage of scalable luffing angle, the design that the translation stage of wherein said first quartz prism (10) is elected vertical adjusting as, moved horizontally, its micrometer head extend to outside the laser oscillator loam cake; Regulate described vertical broadband plane total reflective mirror (8) and described flat output mirror (9) makes incident light rays return along former road; Making the relative distance of the described first plano-concave total reflective mirror (3), the described second plano-concave total reflective mirror (4) is 10.5～11cm,
Whole laser generation light path is 5cm apart from the height of base plate.
2. by the described miniaturized femto-second solid laser oscillator of claim 1, it is characterized in that: what the device of climbing (12) adopted is to be the broadband deielectric-coating of the light total reflection of 700～900nm to the wavelength with 45 ° of incidents.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011103655A CN1160836C (en) | 2001-04-09 | 2001-04-09 | Miniaturized femto-second solid laser oscillator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011103655A CN1160836C (en) | 2001-04-09 | 2001-04-09 | Miniaturized femto-second solid laser oscillator |
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| CN1160836C true CN1160836C (en) | 2004-08-04 |
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| CNB011103655A Expired - Fee Related CN1160836C (en) | 2001-04-09 | 2001-04-09 | Miniaturized femto-second solid laser oscillator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100375346C (en) * | 2003-12-31 | 2008-03-12 | 中国科学院西安光学精密机械研究所 | Core pluggable unit for multi-wavelength cross mode locking femtosecond laser |
| US8018979B2 (en) * | 2007-10-04 | 2011-09-13 | Femtolasers Produktions Gmbh | Mode-locked short pulse laser resonator and short pulse laser arrangement |
| CN105186275B (en) * | 2015-10-13 | 2019-04-02 | 中国科学院物理研究所 | The carrier envelope phase locking device of femtosecond pulse |
| CN105576491B (en) * | 2016-03-14 | 2019-03-26 | 大恒新纪元科技股份有限公司 | A kind of femtosecond laser oscillator |
| CN107863681A (en) * | 2017-11-23 | 2018-03-30 | 黑龙江工程学院 | A kind of four mirror ring resonator laser pulse width automatic compression methods |
| CN107994455A (en) * | 2017-11-23 | 2018-05-04 | 黑龙江工程学院 | A kind of multichannel end pumping narrow spaces thin slice solid state laser |
| CN108521069A (en) * | 2018-03-11 | 2018-09-11 | 中国科学院西安光学精密机械研究所 | A kind of ultrafast laser non-coherent detection and self-stabilization system |
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