CN102044834A - Nonlinear mirror self-mode-locking laser - Google Patents
Nonlinear mirror self-mode-locking laser Download PDFInfo
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- 229910052769 Ytterbium Inorganic materials 0.000 claims description 4
- RSKQIWJJZRAYHJ-UHFFFAOYSA-N [O-]B([O-])[O-].O.[Gd+3] Chemical compound [O-]B([O-])[O-].O.[Gd+3] RSKQIWJJZRAYHJ-UHFFFAOYSA-N 0.000 claims description 4
- PSNPEOOEWZZFPJ-UHFFFAOYSA-N alumane;yttrium Chemical compound [AlH3].[Y] PSNPEOOEWZZFPJ-UHFFFAOYSA-N 0.000 claims description 4
- KLKGSDMHKJBSIJ-UHFFFAOYSA-N aluminum boric acid gadolinium(3+) diborate Chemical compound [Gd+3].B([O-])([O-])[O-].B(O)(O)O.B(O)(O)O.B([O-])([O-])[O-].[Al+3] KLKGSDMHKJBSIJ-UHFFFAOYSA-N 0.000 claims description 4
- NAWDYIZEMPQZHO-UHFFFAOYSA-N ytterbium Chemical compound [Yb] NAWDYIZEMPQZHO-UHFFFAOYSA-N 0.000 claims description 4
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Abstract
The invention relates to a nonlinear mirror self-mode-locked laser, which comprises a pumping source, a resonant cavity mirror and a laser self-frequency-doubling crystal; the self-frequency doubling crystal is processed into a cuboid or a cylinder along the matching direction of frequency doubling phase, and two end faces of the self-frequency doubling crystal are light-transmitting planes and are parallel to each other; plating a dielectric film which is high in transmission of pump light, high in reflection of base frequency light and high in reflection of frequency doubling light on a light-transmitting plane of the self-frequency doubling crystal as an input mirror; the other light-transmitting plane is plated with a dielectric film which is partially transparent to the fundamental frequency light and highly reflective to the frequency doubling light to be used as an output mirror; the end-face pumping mode is adopted as follows: a self-frequency doubling crystal is arranged in front of the output light of the pump source, and the end face of the self-frequency doubling crystal plated with an input mirror is arranged opposite to the output light of the pump source; the side pumping mode is adopted as follows: the pumping source is arranged on the side surface of the self-frequency doubling crystal. The laser realizes the processes of generating fundamental frequency light and generating second harmonic through a single self-frequency-doubling crystal, and has the characteristics of simple operation, reliable performance, high output power, high stability and the like.
Description
Technical field
The present invention relates to a kind of nonlinear mirror self mode locking device, particularly a kind of nonlinear mirror self mode-locked laser based on self-frequency doubling laser crystal.
Background technology
Mode-locked laser is owing to have characteristics such as pulse duration narrow (psec even femtosecond magnitude), peak power height, be widely used in the research of high field optical physics and transient physical process, and derived a series of high science and technology such as the generation, laser plasma, laser fusion (or fission) of high order harmonic component, cosmographic simulation, laser processing, femtosecond time resolution spectral technique, femtochemistry, femtosecond biology, become the strong instrument of Science Explorations.
The generation of mode-locked laser need be regulated its loss in laser cavity, and its regulative mode comprises initiatively and passive two kinds.Wherein laser with active-passive lock mould is to utilize the saturable absorption characteristic of passive modulation element to regulate.It is a kind of passive mode locking mode that nonlinear mirror (nonlinear mirror) is carried out the locked mode modulation, the obtainable maximum power of the laser of its modulation just is subject to the optic damage threshold value by laser crystal and nonlinear crystal, and this process is the process of an optical parameter conversion, belong to the nonlinear elasticity collision, there is not the absorption of light, so the power that such laser obtains generally is higher than the mode-locked laser of semiconductor saturable absorber (being generally semiconductor saturable absorbing mirror) modulation.This modulated process is such: when the basic frequency laser of propagating along a direction in the laser cavity passes through nonlinear crystal, can be converted into second harmonic by the frequency multiplication process, when remaining basic frequency laser and second harmonic arrive output cavity mirror (generally being coated with to basic frequency laser part transmitance, to the film of second harmonic high reflectance), basic frequency laser is partly seen through, produce certain loss, second harmonic is reflected back toward along propagating in the other direction, during again by nonlinear crystal, be converted into basic frequency laser by mixing again.In this course, the part of fundamental frequency light is converted into second harmonic earlier and propagates, changes back fundamental frequency light by crystal once more along opposite direction through high reflection mirror again, the loss of this part fundamental frequency light is less, and the fundamental frequency light part that is not converted into second harmonic is because the part transmitance of outgoing mirror and loss is bigger.In the second harmonic production process, the power density of fundamental frequency light is high more, and shg efficiency will be high more, and second harmonic is reflected along in the other direction once more by nonlinear crystal the time, changes into the efficient of fundamental frequency light
The described self-frequency-doubling crystal direction that is complementary along the frequency multiplication position is processed into a cuboid or cylinder, and described cuboid or cylindrical two end faces are logical optical plane, and two logical optical planes are parallel to each other; Described resonator mirror is formed as outgoing mirror for the deielectric-coating that fundamental frequency light partly sees through, the frequency doubled light height reflects by an input mirror with in described self-frequency-doubling crystal's logical optical plane plating; Or
Described resonator mirror is high thoroughly for pump light by a logical optical plane plating the self-frequency-doubling crystal, fundamental frequency light is high instead, the high anti-deielectric-coating of frequency doubled light is formed as input mirror and an outgoing mirror; Or
Described resonator mirror is made up of an input mirror and an outgoing mirror, and at the film of the logical optical planes plating of two of this self-frequency-doubling crystal for fundamental frequency light and frequency doubled light high permeability;
Wherein, pump mode adopts end face or side to carry out pumping, adopts the end pumping mode to be: the place ahead of described pumping source output light is provided with described input mirror, described self-frequency-doubling crystal and described outgoing mirror in proper order;
Adopt the profile pump mode to be: described pumping source is arranged on described self-frequency-doubling crystal's side.
In above-mentioned technical scheme, also comprise a speculum; Described speculum is arranged on the side that the self-frequency-doubling crystal does not plate chamber mirror film in the light path, and is provided with 2 °-180 ° inclination angle, and described speculum is formed resonant cavity with incident mirror, outgoing mirror, makes the fundamental frequency optical resonance.
In above-mentioned technical scheme, also comprise a LD optical coupling part and a focusing system; Described LD optical coupling part and described focusing system are set in sequence on the light path between this described pumping source and the input mirror.
The invention provides a kind of nonlinear mirror mode-locked laser, comprise pumping source and resonator mirror; It is characterized in that: also comprise a laser self frequency-doubling crystal;
The described self-frequency-doubling crystal direction that is complementary along the frequency multiplication position is processed into a cuboid or cylinder, and described cuboid or cylindrical two end faces are logical light face, and two logical light faces are parallel to each other; Wherein, this self-frequency-doubling crystal's a logical light face is the plane, and another logical light face is cut an oblique angle, and the oblique angle is the 0.1-20 degree; Described resonator mirror is made up of an input mirror and outgoing mirror, at the film of the logical optical planes plating of two of this self-frequency-doubling crystal for fundamental frequency light and frequency doubled light high permeability; Wherein, pump mode adopts end face or side to carry out pumping, adopts the end pumping mode to be: the place ahead of described pumping source output light is provided with described input mirror, described self-frequency-doubling crystal and described outgoing mirror in proper order; Described self-frequency-doubling crystal is cut into logical light face one end at oblique angle near outgoing mirror;
Also just high more, thus form one little for high power density fundamental frequency optical loss, and for the big adjustment process of low power density loss.In actual mechanical process, generally all adopt two crystal: one as laser crystal, and in order to produce basic frequency laser, second is frequency-doubling crystal, in order to carry out second harmonic and inverse process.This has brought a lot of inconvenience to practical operation, such as: realizing that non-linear the position of laser crystal and nonlinear crystal, angle etc. all need to be optimized when mode-locked laser export, make it to mate.
Summary of the invention
The objective of the invention is to, problem at present nonlinear mirror mode-locked laser existence, thereby provide a kind of laser crystal and nonlinear crystal that adopts in the alternative traditional nonlinear mirror mode-locked laser of a self-frequency-doubling crystal, pump light injects the self-frequency-doubling crystal, by self-frequency-doubling crystal and output cavity mirror film the loss of fundamental frequency light is modulated, obtain the nonlinear mirror mode-locked laser of self mode locking laser output.This laser output power only is subject to this self-frequency-doubling crystal's optic damage threshold value, and this non-linear process is the process of optical parameter conversion, does not have the generation of heat, so can realize high power output.
The object of the present invention is achieved like this:
The invention provides a kind of nonlinear mirror self mode-locked laser, comprise pumping source and resonator mirror; It is characterized in that: also comprise a laser self frequency-doubling crystal;
The described self-frequency-doubling crystal direction that is complementary along the frequency multiplication position is processed into a cuboid or cylinder, and described cuboid or cylindrical two end faces are logical optical plane, and two logical optical planes are parallel to each other; Described resonator mirror is to be made in respectively on two logical optical planes of self-frequency-doubling crystal, wherein, in the logical optical plane plating of of self-frequency-doubling crystal for high anti-, the high anti-deielectric-coating of frequency doubled light of high saturating, the fundamental frequency light of pump light as input mirror; Another logical optical plane plating for fundamental frequency light partly see through, the deielectric-coating of the high reflection of frequency doubled light is as outgoing mirror; Wherein, pump mode adopts end face or side to carry out pumping, adopts the end pumping mode to be: the place ahead of described pumping source output light is provided with described self-frequency-doubling crystal, and this self-frequency-doubling crystal is coated with the end face of input mirror and places facing to pumping source output light;
Adopt the profile pump mode to be: described pumping source is arranged on described self-frequency-doubling crystal's side.
The invention provides a kind of nonlinear mirror mode-locked laser, comprise pumping source and resonator mirror; It is characterized in that: also comprise a laser self frequency-doubling crystal;
Adopt the profile pump mode to be: described pumping source is arranged on described self-frequency-doubling crystal's side.
The invention provides a kind of nonlinear mirror mode-locked laser, comprise pumping source and resonator mirror; It is characterized in that: also comprise a laser self frequency-doubling crystal;
The described self-frequency-doubling crystal direction that is complementary along the frequency multiplication position is processed into a cuboid or cylinder, described cuboid or cylindrical two end faces are logical light face, and two logical light faces are parallel to each other, this self-frequency-doubling crystal's a logical light face is the plane, is coated with high anti-, the high anti-film of frequency doubled light of, fundamental frequency light high saturating for pump light as input mirror on the logical light face on described plane; The logical light face of another of this self-frequency-doubling crystal is cut an oblique angle, and the oblique angle is the 0.1-20 degree; Wherein, pump mode adopts end pumping or profile pump, adopts the end pumping mode to be: the place ahead of described pumping source output light is provided with a described self-frequency-doubling crystal and an outgoing mirror in proper order; Described self-frequency-doubling crystal is cut into the film of the logical light face plating at oblique angle for fundamental frequency light and frequency doubled light high permeability, and this self-frequency-doubling crystal is cut into the logical light face end at oblique angle near outgoing mirror, and adopt the profile pump mode to be: described pumping source is arranged on described self-frequency-doubling crystal's side;
Perhaps described self-frequency-doubling crystal for be coated with on the logical light face on plane for to the high reflection of frequency doubled light, to the fundamental frequency light transmission rate be the deielectric-coating of 60-99% as outgoing mirror, the logical light face of another of this self-frequency-doubling crystal is cut an oblique angle, the oblique angle is the 0.1-20 degree; Wherein, pump mode adopts end pumping or side to carry out pumping, adopts the end pumping mode to be: the place ahead of described pumping source output light is provided with an input mirror, described self-frequency-doubling crystal in proper order; Described self-frequency-doubling crystal is cut into the film of the logical light face plating at oblique angle for fundamental frequency light and frequency doubled light high permeability; Adopt the profile pump mode to be: described pumping source is arranged on described self-frequency-doubling crystal's side;
In above-mentioned technical scheme, also comprise a speculum; Described speculum is arranged on the light path between self-frequency-doubling crystal's sharping end and the chamber mirror, and is provided with 2 °-180 ° inclination angle, and described speculum is with self-frequency-doubling crystal chamber mirror end, independently the chamber mirror is formed resonant cavity, makes the fundamental frequency optical resonance.
In above-mentioned technical scheme, also comprise a LD optical coupling part and a focusing system; Described LD optical coupling part and described focusing system are set in sequence on the light path between this described pumping source and the input mirror.
In above-mentioned technical scheme, described self-frequency-doubling crystal is neodymium-doped calcium oxygen yttrium Nd:YCa
4O (BO
3)
3(below write a Chinese character in simplified form: Nd:YCOB) or line borate oxygen gadolinium [Nd:GdCa
4O (BO
3)
3, write a Chinese character in simplified form: Nd:GdCOB], perhaps neodymium-doped tetraborate aluminium yttrium crystal (hereinafter to be referred as Nd:YAB) or aluminium tetraborate gadolinium crystal (be called for short Nd:GdAB) are perhaps mixed the line borate oxygen yttrium Yb:YCa of ytterbium
4O (BO
3)
3(below write a Chinese character in simplified form: Yb:YCOB) or line borate oxygen gadolinium [Yb:GdCa
4O (BO
3)
3, write a Chinese character in simplified form: Yb:GdCOB], perhaps mix ytterbium tetraborate aluminium yttrium crystal (hereinafter to be referred as Yb:YAB), perhaps mix ytterbium aluminium tetraborate gadolinium crystal (being called for short Yb:GdAB), wherein Nd
3+Doping content is 0.001-0.25at., Yb
3+Doping content is 0.001-0.50at..
In above-mentioned technical scheme, the thickness of described self-frequency-doubling crystal's optical direction is 0.1-50mm.
In above-mentioned technical scheme, the end face that also is included in sharping can only plate the film for fundamental frequency light and frequency doubled light high permeability.
In above-mentioned technical scheme, described pumping source is semiconductor laser diode (LD) or xenon lamp; Wherein, described semiconductor laser diode is single tube structure, array structure or surface launching structure; Semiconductor laser diode center emission wavelength is the absorbing wavelength of self-frequency-doubling crystal's correspondence, can be 785 ± 5nm, 795 ± 5nm, 812 ± 5nm, 868 ± 5nm or 888 ± 5nm as the Nd:YCOB crystal.
Nonlinear mirror self mode-locked laser provided by the invention adopts the pump light of pumping source emission to inject the self-frequency-doubling crystal, by self-frequency-doubling crystal and output cavity mirror film the loss of fundamental frequency light is modulated, and obtains the output of self mode locking laser.This nonlinear mirror self mode-locked laser has the following advantages:
(1) simple to operate, because nonlinear mirror mode-locked laser of the present invention, its core is for using a self-frequency-doubling crystal, and this self-frequency-doubling crystal's set laser and non-linear process design and regulate the output that just can realize self mode locking laser by a self-frequency-doubling crystal is optimized;
(2) can realize high power output, nonlinear mirror mode-locked laser of the present invention, its power output only is subject to self-frequency-doubling crystal's optic damage threshold value, and this non-linear process is the process of an optical parameter conversion, there is not the generation of heat, so can realize high power output;
(3) laser output is stable, because non-linear self mode-locked laser of the present invention uses single self-frequency-doubling crystal, with respect to the non-linear nonlinear mirror self mode-locked laser that adopts two crystal (laser crystal and a nonlinear crystal), the mode-locked laser output that does not have the variation of two crystal relative positions or angle and cause changes, and is therefore more stable.
Nonlinear mirror self mode-locked laser provided by the invention has characteristics such as power output height, simple to operate, stable height, can provide important light-pulse generator for ultrafast and ultra-intense laser field.
Description of drawings
Fig. 1 is the structural representation of the nonlinear mirror self mode-locked laser of LD end pumping of the present invention;
Fig. 2 is the structural representation of the nonlinear mirror self mode-locked laser of xenon lamp profile pump of the present invention;
Drawing is described as follows:
1-pumping source 2-LD optical coupling part 3-focusing system
4-input mirror 5-self-frequency-doubling crystal 6-speculum
7-outgoing mirror 8-front cavity mirror
Embodiment
The invention will be further described below in conjunction with specific embodiment, but the scope of protection of present invention is not limited to the expressed scope of embodiment.
Embodiment 1
Present embodiment utilizes a neodymium-doped calcium oxygen yttrium Nd:YCa
4O (BO
3)
3As self-frequency-doubling crystal 5; Wherein, Nd
3+Ion doping concentration is 0.1at..This self-frequency-doubling crystal 5 direction (be θ=113 °, φ=36.5 °) that is complementary along the frequency multiplication position is processed into rectangle, and this rectangle crystal length is 25mm, and sectional dimension is 5mm * 5mm, and thickness is 0.1mm.The both ends of the surface of this rectangle crystal are logical optical planes, and two logical optical planes are parallel to each other.
The input mirror 4 of the resonator mirror of present embodiment and outgoing mirror 7 are to be made in respectively on two logical optical planes of self-frequency-doubling crystal, two logical optical planes are through optical polish, wherein, in the logical optical plane plating of of self-frequency-doubling crystal for high anti-, the high anti-deielectric-coating of frequency doubled light of high saturating, the fundamental frequency light of pump light (promptly for high saturating, 1060nm of 808nm and 530 high anti-films) as input mirror 4; Another logical optical plane plating for fundamental frequency light partly see through, the deielectric-coating of the high reflection of frequency doubled light is as outgoing mirror 7, promptly is 80% deielectric-coating to the high reflection of 0.525-0.55 μ m and to 1.05-1.1 μ m reflectivity.Wherein, pump mode adopts end face or side to carry out pumping, adopt the end pumping mode to be: the place ahead of described pumping source 1 output light is provided with this self-frequency-doubling crystal 5, and this self-frequency-doubling crystal 5 places facing to the output light of pumping source 1 as the end face of input mirror, with reference to figure 1.
Adopt the profile pump mode to be: described pumping source 1 is arranged on described self-frequency-doubling crystal's 5 top, with reference to figure 2.
The pumping source 1 of present embodiment adopts single tube structural semiconductor laser diode, and this semiconductor laser diode center emission wavelength is the absorbing wavelength of self-frequency-doubling crystal's 5 correspondences, is 811 ± 5nm.
Embodiment 2
Utilize emission wavelength for the semiconductor laser diode of 812nm as pumping source 1, with Nd:YCOB self-frequency-doubling crystal 5 as laser working medium and frequency-doubling crystal, adopt cavity configuration as shown in Figure 1 to make nonlinear mirror self mode-locked laser of the present invention.
The green glow self mode-locked laser of present embodiment comprises: laser diode pumping source 1, Nd:YCOB self-frequency-doubling crystal 5, LD optical coupling part 2, focusing system 3 resonant cavity mirrors, and independently form by input mirror 4, speculum 6 and outgoing mirror 7 by one for the resonator mirror of present embodiment; Wherein, this LD optical coupling part 2 and focusing system 3 are set in sequence on the light path between this pumping source 1 and the input mirror 4, between input mirror 4 and the speculum 6 self-frequency-doubling crystal 5 are set, and outgoing mirror 7 before the speculum 6 reflective roads is with reference to figure 1.The Nd:YCOB self-frequency-doubling crystal's 5 of present embodiment Nd
3 +Ion concentration is 0.001at., and this self-frequency-doubling crystal 5 is along frequency multiplication phase matched direction processing, and machining angle is θ=90 °, rectangular shape is cut in φ=35 °, and sectional dimension is 5mm * 5mm, thickness is 0.1mm, and two end faces of cuboid are logical light face, and are plane parallel to each other.A logical light face of self-frequency-doubling crystal 5 is as the end face of pump light incident, and this end face is coated with the deielectric-coating that pump light 812nm, fundamental frequency light 1.05-1.1 μ m and three wave band height of frequency doubled light 0.525-0.55 μ m are seen through.Go up plating instead the self-frequency-doubling crystal near the end face (being another logical light face of self-frequency-doubling crystal 5) of outgoing mirror to pump light 812nm height, and to fundamental frequency light 1.05-1.1 μ m and the high saturating deielectric-coating of frequency doubled light 0.525-0.55 mu m waveband, such film system helps the abundant absorption of pump light, improve pump intensity, improve lasing efficiency.The resonator mirror of present embodiment is by the laser cavity theory, calculate, input mirror 4 is flat mirror, speculum 5 is the concave mirror of curvature 500mm, outgoing mirror 7 is flat mirror, wherein input mirror 4 surface platings are with high saturating to 812nm, to 1.05-1.1 μ m, 0.525-0.55 the deielectric-coating of the high reflection of μ m, speculum 6 in resonant cavity curved surface and plating with to 1.05-1.1 μ m, 0.525-0.55 the deielectric-coating of the high reflection of μ m, the face of outgoing mirror 7 in resonant cavity plates the deielectric-coating to the high reflection of 0.525-0.55 μ m and to 1.05-1.1 μ m reflectivity to be 60%, distance between input mirror 4 and the speculum 6 is 400-490mm, distance between speculum 6 and the outgoing mirror 7 is 400-490mm, and the angle of speculum 6 and outgoing mirror 7 is about 10 °.After pump power reaches laser threshold and locked mode threshold value, can directly export the nonlinear mirror mode-locked laser.
The LD optical coupling part 2 of present embodiment adopts 400 commercially available μ m silica fibers; Focusing system 3 adopts the focusing system of this area routine, for example adopts two systems that form for the high saturating lens of pump light.
Described resonator mirror, as outgoing mirror and outgoing mirror, the distance between the selection of its curvature and the chamber mirror can be calculated acquisition by the design theory of laserresonator, and this theory is that laser field is known theory, and this is that those skilled in the art can implement.
Embodiment 3: as embodiment 2 described structures, different is to use Nd
3+Ion doping concentration is the Nd:YCOB self-frequency-doubling crystal 5 of 0.25at., and this self-frequency-doubling crystal 5 is processed into cylindrical, and its machining angle is θ=148 °, φ=0 °, and crystal diameter is 6mm, length is 50mm.The face of outgoing mirror 7 in resonant cavity plates the deielectric-coating to the high reflection of 0.525-0.55 μ m and to 1.05-1.1 μ m reflectivity to be 99%.
Embodiment 4: as described in embodiment 2, different is that self-frequency-doubling crystal 5 selects Nd:GdCOB for use, Nd
3+Ion doping concentration is 0.001at., and machining angle is θ=90 °, φ=46 °, and self-frequency-doubling crystal 5 is cut into cylindric, and sectional dimension is
Mm, thickness are 5mm, near 0.1 ° of oblique angle of an end-grain cutting of outgoing mirror.
Embodiment 5: as described in embodiment 4, different the is self-frequency-doubling crystal's of Nd:GdCOB machining angle is θ=160 °, φ=0 °, Nd
3+Ion doping concentration is 0.1at..And this self-frequency-doubling crystal 5 for be coated with on the logical light face on plane for to the high reflection of frequency doubled light, to the fundamental frequency light transmission rate be the deielectric-coating of 60-99% as outgoing mirror, the logical light face of another of this self-frequency-doubling crystal 5 is cut an oblique angle, the oblique angle is 12 degree; Wherein, pump mode adopts end pumping: the place ahead of pumping source 1 output light is provided with a flat mirror in proper order as input mirror 4, self-frequency-doubling crystal 5; This self-frequency-doubling crystal 5 cuts the logical light at an oblique angle facing to the setting of pumping source input light; Self-frequency-doubling crystal 5 is cut into the film of the logical light face plating at oblique angle for fundamental frequency light and frequency doubled light high permeability.
Perhaps the profile pump mode is: pumping source 1 adopts xenon lamp, and pumping source 1 is arranged on self-frequency-doubling crystal 5 side, with reference to figure 2.
Embodiment 6: as structure as described in the embodiment 5, self-frequency-doubling crystal's 5 one logical light faces of different is Nd:GdCOB are cut an oblique angle, and the oblique angle is 20 degree, and the logical light face at oblique angle is as the pump optical input surface; Machining angle be θ=113 °, φ=47.5 °, Nd
3+Ion doping concentration is 0.25at..
Embodiment 7: structure shown in embodiment 2, embodiment makes one in order to produce the nonlinear mirror self mode locking laser output that wavelength is 0.9-1 μ m.The plating of this self-frequency-doubling crystal's 5 both ends of the surface is with to 812nm, 1.05-1.1 μ m, 0.9-1 the high saturating deielectric-coating of μ m and 0.45-0.5 mu m waveband, input mirror 4 is flat mirror, the surface plating is with high saturating to 812nm and 1.05-1.1 μ m, deielectric-coating to 0.9-1 μ m and the high reflection of 0.45-0.5 μ m, speculum 6 is that a radius of curvature is the concave mirror of 500mm, curved surface in resonant cavity and plating with high saturating to 1.05-1.1 μ m, deielectric-coating to 0.9-1 μ m and the high reflection of 0.45-0.5 μ m, outgoing mirror 7 is a flat mirror, and the face plating in resonant cavity is with high saturating to 1.05-1.1 μ m, it to the high reflection of 0.45-0.5 μ m and to 0.9-1 μ m reflectivity 80% deielectric-coating.Self-frequency-doubling crystal's 5 cut direction are the I class frequency multiplication direction that 0.94 μ m is converted to 0.47 μ m.Strengthen pump power, can directly export the nonlinear mirror mode-locked laser; This is that those skilled in the art can be realized.
Embodiment 8: the structure shown in embodiment 2, embodiment makes one in order to produce the self mode locking laser output that wavelength is 1.3-1.4 μ m.Different is, the plating of self-frequency-doubling crystal 5 surface is with to being coated with 812nm, 1.05-1.1 μ m, 1.3-1.4 the high saturating deielectric-coating of μ m and 0.65-0.7 mu m waveband, input mirror 4 is a flat mirror, the surface plating is with high saturating to 812nm and 1.05-1.1 μ m, deielectric-coating to 1.3-1.4 μ m and the high reflection of 0.65-0.7 mu m waveband, speculum 6 is that a radius of curvature is the concave mirror of 500mm, curved surface in resonant cavity and plating with high saturating to 1.05-1.1 μ m, deielectric-coating to 1.3-1.4 μ m and the high reflection of 0.65-0.7 mu m waveband, outgoing mirror 7 is a flat mirror, face plating in resonant cavity is with high saturating to 1.05-1.1 μ m, to the high reflection of 0.65-0.7 μ m and to 1.3-1.4 μ m reflectivity is 60% deielectric-coating, and the crystal-cut direction is the I class frequency multiplication direction that 1.33 μ m are converted to 0.67 μ m.Strengthen pump power, can directly export the output of nonlinear mirror mode-locked laser.
Embodiment 9: the structure shown in embodiment 2, and different is that the self-frequency-doubling crystal is the Nd:YAB crystal, the crystal-cut direction is the I class frequency multiplication direction that 1.06 μ m are converted to 0.53 μ m, realizes its nonlinear mirror self mode locking laser.
Embodiment 10: shown in embodiment 1, different is that the self-frequency-doubling crystal is the Nd:GdAB crystal, and the crystal-cut direction is the I class frequency multiplication direction that 1.06 μ m are converted to 0.53 μ m, realizes its nonlinear mirror self mode locking laser.
Embodiment 11: shown in embodiment 1, different is that the self-frequency-doubling crystal is Yb:YCOB, crystal both ends of the surface platings is with to 880-990nm, the high saturating film of 1015-1230nm and 0.5-0.66 μ m, input mirror 4 is a flat mirror, the surface plating is with high saturating to 880-990nm, deielectric-coating to 1015-1230nm and the high reflection of 0.5-0.66 μ m, speculum 6 is that a radius of curvature is the concave mirror of 500mm, curved surface in resonant cavity and plating with film to the high reflection of 1015-1230nm and 0.5-0.66 μ m, outgoing mirror 7 is a flat mirror, and the face in resonant cavity plates the deielectric-coating to the high reflection of 0.5-0.66 μ m and to the 1015-1230nm reflectivity to be 80%.The crystal-cut direction is the I class frequency multiplication direction that 1.08 μ m are converted to 0.54 μ m.Strengthen pump power, can directly export the nonlinear mirror mode-locked laser.
Embodiment 12: as shown in Figure 2, present embodiment is with the nonlinear mirror self mode-locked laser of xenon lamp as pumping source 1, employing profile pump mode, self-frequency-doubling crystal 5 is the Nd:YCOB crystal, doping content is 0.01-0.25at, self-frequency-doubling crystal 5 is along the I class frequency multiplication direction cutting of Nd:YCOB, be processed into cylinder, sectional dimension is
Length is 20mm, cylindrical both ends of the surface are logical light face, the deielectric-coating of two logical light faces platings so that 1.05-1.1 μ m and two wave band height of 0.525-0.5 μ m are seen through, front cavity mirror 8 and outgoing mirror 7 all are level crossings, distance is 500mm, the plating of the surface of front cavity mirror 8 is with the deielectric-coating to 1.05-1.1 μ m and the high reflection of two wave bands of 0.525-0.55 μ m, and the surface plating of outgoing mirror 7 is with to the high reflection of 0.525-0.55 μ m, and 1.05-1.1 mu m waveband reflectivity is 80% deielectric-coating.By strengthening the pump energy of xenon lamp, realize the output of nonlinear mirror self mode locking laser.
Should be noted that; those of ordinary skills can understand the detailed description of above the present invention being carried out; and may make amendment to part technical characterictic of the present invention; and not breaking away from the connotation of technical solution of the present invention, these changes all should be encompassed among the technical scheme scope that the present invention asks for protection.
Claims (10)
1. a nonlinear mirror self mode-locked laser comprises pumping source and resonator mirror; It is characterized in that: also comprise a laser self frequency-doubling crystal;
The described self-frequency-doubling crystal direction that is complementary along the frequency multiplication position is processed into a cuboid or cylinder, and described cuboid or cylindrical two end faces are logical optical plane, and two logical optical planes are parallel to each other; Described resonator mirror is to be made in respectively on two logical optical planes of self-frequency-doubling crystal, wherein, in the logical optical plane plating of of self-frequency-doubling crystal for high anti-, the high anti-deielectric-coating of frequency doubled light of high saturating, the fundamental frequency light of pump light as input mirror; Another logical optical plane plating for fundamental frequency light partly see through, the deielectric-coating of the high reflection of frequency doubled light is as outgoing mirror; Wherein, pump mode adopts end face or side to carry out pumping, adopts the end pumping mode to be: the place ahead of described pumping source output light is provided with described self-frequency-doubling crystal, and this self-frequency-doubling crystal is coated with the end face of input mirror and places facing to pumping source output light;
Adopt the profile pump mode to be: described pumping source is arranged on described self-frequency-doubling crystal's side.
2. a nonlinear mirror self mode-locked laser comprises pumping source and resonator mirror; It is characterized in that: also comprise a laser self frequency-doubling crystal;
The described self-frequency-doubling crystal direction that is complementary along the frequency multiplication position is processed into a cuboid or cylinder, and described cuboid or cylindrical two end faces are logical optical plane, and two logical optical planes are parallel to each other; Described resonator mirror is formed as outgoing mirror for the deielectric-coating that fundamental frequency light partly sees through, the frequency doubled light height reflects by an input mirror with in described self-frequency-doubling crystal's logical optical plane plating; Or
Described resonator mirror is high thoroughly for pump light by a logical optical plane plating the self-frequency-doubling crystal, fundamental frequency light is high instead, the high anti-deielectric-coating of frequency doubled light is formed as input mirror and an outgoing mirror; Or
Described resonator mirror is made up of an input mirror and an outgoing mirror, and at the film of the logical optical planes plating of two of this self-frequency-doubling crystal for fundamental frequency light and frequency doubled light high permeability;
Wherein, pump mode adopts end face or side to carry out pumping, adopts the end pumping mode to be: the place ahead of described pumping source output light is provided with described input mirror, described self-frequency-doubling crystal and described outgoing mirror in proper order;
Adopt the profile pump mode to be: described pumping source is arranged on described self-frequency-doubling crystal's side.
3. nonlinear mirror self mode-locked laser according to claim 2 is characterized in that, also comprises a speculum; Described speculum is arranged on the side that the self-frequency-doubling crystal does not plate chamber mirror film in the light path, and is provided with 2 °-180 ° inclination angle, and described speculum is formed resonant cavity with incident mirror, outgoing mirror, makes the fundamental frequency optical resonance.
4. nonlinear mirror self mode-locked laser according to claim 1 and 2 is characterized in that, also comprises a LD optical coupling part and a focusing system; Described LD optical coupling part and described focusing system are set in sequence on the light path between this described pumping source and the input mirror.
5. a nonlinear mirror self mode-locked laser comprises pumping source and resonator mirror; It is characterized in that: also comprise a laser self frequency-doubling crystal;
The described self-frequency-doubling crystal direction that is complementary along the frequency multiplication position is processed into a cuboid or cylinder, and described cuboid or cylindrical two end faces are logical light face; Wherein, this self-frequency-doubling crystal's a logical light face is the plane, and another logical light face is cut an oblique angle, and the oblique angle is the 0.1-20 degree; Described resonator mirror is made up of an input mirror and outgoing mirror, at the film of the logical optical planes plating of two of this self-frequency-doubling crystal for fundamental frequency light and frequency doubled light high permeability; Wherein, pump mode adopts end face or side to carry out pumping, adopts the end pumping mode to be: the place ahead of described pumping source output light is provided with described input mirror, described self-frequency-doubling crystal and described outgoing mirror in proper order; Described self-frequency-doubling crystal is cut into logical light face one end at oblique angle near outgoing mirror;
Adopt the profile pump mode to be: described pumping source is arranged on described self-frequency-doubling crystal's side.
6. a nonlinear mirror self mode-locked laser comprises pumping source and resonator mirror; It is characterized in that: also comprise a laser self frequency-doubling crystal;
The described self-frequency-doubling crystal direction that is complementary along the frequency multiplication position is processed into a cuboid or cylinder, described cuboid or cylindrical two end faces are logical light face, this self-frequency-doubling crystal's a logical light face is the plane, is coated with high anti-, the high anti-film of frequency doubled light of, fundamental frequency light high saturating for pump light as input mirror on the logical light face on described plane; The logical light face of another of this self-frequency-doubling crystal is cut an oblique angle, and the oblique angle is the 0.1-20 degree; Wherein, pump mode adopts end pumping or profile pump, adopts the end pumping mode to be: the place ahead of described pumping source output light is provided with a described self-frequency-doubling crystal and an outgoing mirror in proper order; Described self-frequency-doubling crystal is cut into the film of the logical light face plating at oblique angle for fundamental frequency light and frequency doubled light high permeability, and this self-frequency-doubling crystal is cut into the logical light face end at oblique angle near outgoing mirror, and adopt the profile pump mode to be: described pumping source is arranged on described self-frequency-doubling crystal's side;
Perhaps described self-frequency-doubling crystal for be coated with on the logical light face on plane for to the high reflection of frequency doubled light, to the fundamental frequency light transmission rate be the deielectric-coating of 60-99% as outgoing mirror, the logical light face of another of this self-frequency-doubling crystal is cut an oblique angle, the oblique angle is the 0.1-20 degree; Wherein, pump mode adopts end pumping or side to carry out pumping, adopt the end pumping mode to be: the place ahead of described pumping source output light is provided with an input mirror, described self-frequency-doubling crystal in proper order, and this self-frequency-doubling crystal's the logical light of cutting an oblique angle is facing to the setting of pumping source input light; Described self-frequency-doubling crystal is cut into the film of the logical light face plating at oblique angle for fundamental frequency light and frequency doubled light high permeability;
Adopt the profile pump mode to be: described pumping source is arranged on described self-frequency-doubling crystal's side;
Also comprise a speculum; Described speculum is arranged on the light path between self-frequency-doubling crystal's sharping end and the chamber mirror, and is provided with 2 °-180 ° inclination angle, and described speculum is with self-frequency-doubling crystal chamber mirror end, independently the chamber mirror is formed resonant cavity, makes the fundamental frequency optical resonance.
7. according to claim 5 or 6 described nonlinear mirror self mode-locked lasers, it is characterized in that, also comprise a LD optical coupling part and a focusing system; Described LD optical coupling part and described focusing system are set in sequence on the light path between this described pumping source and the input mirror.
8. according to claim 1,2,5 or 6 described nonlinear mirror self mode-locked lasers, it is characterized in that at described deielectric-coating be the film that helps pump light absorption, fundamental frequency light and frequency doubled light vibration, the corresponding crystal absorbing wavelength of pump light wavelength, fundamental light wave long corresponding crystal emission wavelength can be 0.94 μ m, 1.06 μ m, 1.09 μ m, 1.33 μ m or 1.08 μ m; The frequency doubled light wavelength can be 0.47 μ m, 0.53 μ m, 0.55 μ m, 0.66 μ m or 0.54 μ m.
9. according to claim 1,2,5 or 6 described nonlinear mirror self mode-locked lasers, it is characterized in that, described self-frequency-doubling crystal is neodymium-doped calcium oxygen yttrium, line borate oxygen gadolinium, neodymium-doped tetraborate aluminium yttrium crystal, aluminium tetraborate gadolinium crystal, the line borate oxygen yttrium of mixing ytterbium, line borate oxygen gadolinium, mixes the ytterbium tetraborate aluminium yttrium crystal or mix the ytterbium aluminium tetraborate gadolinium crystal, wherein Nd
3+Doping content is 0.001-0.25at., Yb
3+Doping content is 0.001-0.50at..
10. according to claim 1,2,5 or 6 described nonlinear mirror self mode-locked lasers, it is characterized in that described pumping source is semiconductor laser diode or xenon lamp; This semiconductor laser diode center emission wavelength is the absorbing wavelength of self-frequency-doubling crystal's correspondence.
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| CN102593706A (en) * | 2012-01-12 | 2012-07-18 | 中国科学院理化技术研究所 | Side-pumped round-bar-shaped self-frequency-doubling crystal laser |
| CN102801096A (en) * | 2012-08-28 | 2012-11-28 | 青岛镭视光电科技有限公司 | Automatic optical parametric oscillation laser based on calcium oxoborate crystal |
| CN105071217A (en) * | 2015-08-27 | 2015-11-18 | 山东大学 | Self-frequency-doubling all-solid-state yellow-light laser |
| JP2020528661A (en) * | 2018-12-11 | 2020-09-24 | 山東大学 | All-solid-state high-power slab laser based on phonon-band end emission |
| CN117374724A (en) * | 2023-11-27 | 2024-01-09 | 重庆师范大学 | Pulse control system of external cavity semiconductor self-mode-locking laser |
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| CN102593706A (en) * | 2012-01-12 | 2012-07-18 | 中国科学院理化技术研究所 | Side-pumped round-bar-shaped self-frequency-doubling crystal laser |
| CN102801096A (en) * | 2012-08-28 | 2012-11-28 | 青岛镭视光电科技有限公司 | Automatic optical parametric oscillation laser based on calcium oxoborate crystal |
| CN105071217A (en) * | 2015-08-27 | 2015-11-18 | 山东大学 | Self-frequency-doubling all-solid-state yellow-light laser |
| CN105071217B (en) * | 2015-08-27 | 2017-10-24 | 山东大学 | It is a kind of from frequency multiplication all-solid-state yellow laser |
| JP2020528661A (en) * | 2018-12-11 | 2020-09-24 | 山東大学 | All-solid-state high-power slab laser based on phonon-band end emission |
| EP3641081A4 (en) * | 2018-12-11 | 2021-05-05 | Shan Dong University | Phonon band edge emission-based all solid state high power slab laser |
| JP7037731B2 (en) | 2018-12-11 | 2022-03-17 | 山東大学 | All-solid-state high-power slab laser based on phonon-band end emission |
| CN117374724A (en) * | 2023-11-27 | 2024-01-09 | 重庆师范大学 | Pulse control system of external cavity semiconductor self-mode-locking laser |
| CN117374724B (en) * | 2023-11-27 | 2024-08-06 | 重庆师范大学 | Pulse control system of external cavity semiconductor self-mode-locking laser |
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