CN217362130U - Femtosecond pulse nonlinear compression device based on multi-pass cavity - Google Patents
Femtosecond pulse nonlinear compression device based on multi-pass cavity Download PDFInfo
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- CN217362130U CN217362130U CN202221547234.4U CN202221547234U CN217362130U CN 217362130 U CN217362130 U CN 217362130U CN 202221547234 U CN202221547234 U CN 202221547234U CN 217362130 U CN217362130 U CN 217362130U
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Abstract
The application relates to a femtosecond pulse nonlinear compression device based on a multi-way cavity, which is used for realizing nonlinear compression of pulses and comprises a cover body and a bottom plate; the cover body and the bottom plate are enclosed to form a closed compression chamber, and a concave mirror assembly, an inlet mirror assembly and an outlet mirror assembly are arranged in an inner cavity of the compression chamber; the laser is guided into the concave mirror assembly at a preset angle through the guide-in mirror assembly, is reflected to the guide-out mirror assembly for multiple times in the concave mirror assembly, and is output by the guide-out mirror assembly; the front end of the cover body is provided with an incident window, the rear end of the cover body is provided with an emergent window, and the incident window and the emergent window are arranged oppositely; the bottom plate both sides symmetry is seted up outer gas port, and the top is seted up interior gas port, and the quantity of outer gas port is a plurality of, and the quantity of interior gas port matches with the quantity of outer gas port to the pipeline is linked together. Through the mode of seting up interior gas port and outer gas port at the device bottom plate, fill different gas to compressing in the chamber, satisfy the nonlinear interaction of laser and gas, because the gas port is seted up at the bottom plate, can effectively avoid filling the intracavity device vibration that the gassing in-process air current too big leads to, realize the purpose of hoisting device stability.
Description
Technical Field
The application relates to the technical field of compression after pulse, in particular to a femtosecond pulse nonlinear compression device based on a multi-channel cavity.
Background
The ultra-short pulse laser is widely applied to the technical fields of instant imaging, laser processing, laser surgery and the like, CPA (chirped-pulse amplification) and OPCPA (optical parametric chirped-pulse amplification) are main technical means for generating the ultra-short pulse laser, and the pulse of the laser is limited to dozens to hundreds of femtoseconds due to the phenomena of gain narrowing, energy backflow, phase mismatch and the like in the laser generation process. The femtosecond pulse nonlinear compression device based on the multi-pass cavity is combined with the pulse post-compression technology of the dispersion compensation technology, so that the efficiency is high, the nonlinear accumulation amount is flexible, and the further compression of the pulse can be effectively realized.
Traditional femtosecond pulse nonlinear compression technology cavity based on many logical chambeies is cylindrical, and whole cavity only is fixed on the desktop with the fulcrum that sets up in both ends, and fills the gas vent setting in cavity top or side, and the air current of filling the gassing can direct action on inside lens, influences the stability of device.
SUMMERY OF THE UTILITY MODEL
In view of this, the present application provides a femtosecond pulse nonlinear compression device based on a multi-pass cavity, which achieves nonlinear compression of femtosecond pulses while improving the stability of the device.
According to one aspect of the application, a femtosecond pulse nonlinear compression device based on a multi-pass cavity is provided, which is used for realizing nonlinear compression of pulses and comprises a cover body and a bottom plate;
the cover body and the bottom plate are enclosed to form a closed compression chamber, and a concave mirror assembly, an inlet mirror assembly and an outlet mirror assembly are arranged in an inner cavity of the compression chamber; the laser is guided into the concave mirror assembly at a preset angle through the guiding mirror assembly, is reflected to the guiding mirror assembly for multiple times in the concave mirror assembly, and is output by the guiding mirror assembly;
the front end of the cover body is provided with an incident window, the rear end of the cover body is provided with an emergent window, and the incident window and the emergent window are arranged oppositely;
the two sides of the bottom plate are symmetrically provided with external air ports, the top of the bottom plate is provided with a plurality of internal air ports, the number of the internal air ports is matched with that of the external air ports, a pipeline is laid between the external air ports and the internal air ports, and the pipeline is communicated with the external air ports and the internal air ports;
handles are symmetrically arranged on the front side and the rear side of the top end of the cover body and are fixedly connected with the cover body.
In a possible implementation manner, the exit window and the entrance window have the same structure, the entrance window is disposed at a position of the cover body close to the bottom plate, and the exit window and the entrance window are in central symmetry.
In a possible implementation manner, the concave mirror assembly comprises a first concave mirror and a second concave mirror, the second concave mirror has the same structure as the first concave mirror, and the second concave mirror and the first concave mirror are symmetrically arranged on the front side and the rear side of the central position of the compression chamber.
In one possible implementation, the introducer mirror assembly includes a first introducer mirror and a second introducer mirror;
the first lead-in mirror is arranged on one side, close to the incident laser, of the second concave mirror;
the second lead-in mirror is arranged between the first concave mirror and the second concave mirror, and the second lead-in mirror is positioned at the rear end of the first concave mirror and close to the position of the incident laser;
in one possible implementation, the exit mirror assembly includes a first exit mirror and a second exit mirror;
the first leading-out mirror and the second leading-in mirror have the same structure, the first leading-out mirror is arranged between the first concave mirror and the second concave mirror, and the first leading-out mirror is positioned at the position, close to the laser emergent position, of the second concave mirror;
the second leading-out mirror and the first leading-in mirror are identical in structure, and the second leading-out mirror is arranged on one side, close to the emergent laser, of the second concave mirror.
In a possible implementation manner, the inner cavity of the compression chamber is also provided with a first connecting piece;
the number of the first connecting pieces is five, one end of each of the five first connecting pieces is connected with the first concave mirror, the first leading-in mirror, the second leading-in mirror, the first leading-out mirror and the second leading-out mirror, and the other end of each of the five first connecting pieces is connected with the bottom plate.
In a possible implementation manner, the inner cavity of the compression chamber is also provided with a translation piece and a second connecting piece;
one end of the second connecting piece is connected with one end of the second concave mirror, the other end of the second connecting piece is connected with one end of the translation piece, and the other end of the translation piece is connected with the bottom plate.
In a possible implementation manner, fixing parts are arranged on two sides of the bottom plate, one end of each fixing part is penetrated by a screw and fixedly connected with the bottom plate, and the other end of each fixing part can be connected with the optical platform by penetrating the screw.
In a possible implementation manner, the front end and the rear end of the cover body are provided with a first standby window and a second standby window;
the first standby window and the second standby window are in central symmetry.
In one possible implementation, the cover is made of aluminum, and the bottom plate is made of stainless steel.
The beneficial effects of the femtosecond pulse nonlinear compression device based on the multi-channel cavity of the embodiment of the application are as follows: a closed compression chamber is formed in a mode that the cover body surrounds the bottom plate, and the concave mirror assembly, the leading-in mirror assembly and the leading-out mirror assembly are arranged in an inner cavity of the compression chamber. Specifically, the laser is reflected to the concave mirror assembly through the introduction mirror assembly, is reflected to the derivation mirror assembly for multiple times in an optical cavity formed by the concave mirror assembly, and is finally output by the derivation mirror assembly. The two sides of the bottom plate are symmetrically provided with outer air ports, the top of the bottom plate is provided with an inner air port, and the outer air ports are communicated with the inner air port through pipelines. Gas is filled into the vacuum chamber through the inner and outer gas ports, and the laser and the filled gas perform nonlinear interaction. It should be pointed out that, with inside and outside gas port setting at the bottom plate, can effectively avoid filling the gassing in-process, because each subassembly of compression chamber inner chamber and light path vibration and drift that the air current is too big leads to, hoisting device's stability.
Other features and aspects of the present application will become apparent from the following detailed description of exemplary embodiments, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments, features, and aspects of the application and, together with the description, serve to explain the principles of the application.
FIG. 1 shows a top view of the internal structure of an embodiment of the present application;
FIG. 2 shows an external schematic of an embodiment of the present application;
FIG. 3 illustrates a schematic top view of an embodiment of the present application;
FIG. 4 shows a schematic side view of an embodiment of the present application;
FIG. 5 shows a schematic view of a backplane structure according to an embodiment of the present application;
fig. 6 shows a schematic view of a connector body of an embodiment of the present application.
Detailed Description
Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. In the drawings, like reference numbers indicate functionally identical or similar elements. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
It will be understood, however, that the terms "central," "longitudinal," "lateral," "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the present application or for simplicity of description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be considered limiting of the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.
Furthermore, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present application. It will be understood by those skilled in the art that the present application may be practiced without some of these specific details. In some instances, methods, means, elements and circuits that are well known to those skilled in the art have not been described in detail so as not to obscure the present application.
FIG. 1 shows a top view of the internal structure of an embodiment of the present application; FIG. 2 shows an external schematic of an embodiment of the present application; FIG. 3 shows a schematic top view of an embodiment of the present application; FIG. 4 shows a schematic side view of an embodiment of the present application; FIG. 5 shows a schematic view of a backplane structure of an embodiment of the present application; fig. 6 shows a schematic view of a connector body of an embodiment of the present application.
As shown in FIG. 1, the multi-pass cavity-based femtosecond pulse nonlinear compression device is used for realizing post-compression of pulses and comprises: a cover body 200, a bottom plate 300; the housing 200 and the bottom plate 300 enclose a closed compression chamber 100, and a concave mirror assembly 210, an inlet mirror assembly 220 and an outlet mirror assembly 230 are arranged in the inner cavity of the compression chamber 100; the laser is guided into the concave mirror assembly 210 through the guiding mirror assembly 220 at a preset angle, is reflected to the guiding mirror assembly 230 for multiple times in the concave mirror assembly 210, and is output by the guiding mirror assembly 230; the front end of the cover body 200 is provided with an incident window 120, the rear end of the cover body 200 is provided with an exit window 130, and the incident window 120 and the exit window 130 are arranged oppositely; the two sides of the bottom plate 300 are symmetrically provided with the outer air ports 600, the top of the bottom plate 300 is provided with the inner air ports 700, the number of the outer air ports 600 is multiple, the number of the inner air ports 700 is matched with the number of the outer air ports 600, a pipeline 800 is laid between the outer air ports 600 and the inner air ports 700, and the pipeline 800 is communicated with the outer air ports 600 and the inner air ports 700; handles 400 are symmetrically arranged at the front side and the rear side of the top end of the cover body 200, and the handles 400 are fixedly connected with the cover body 200.
In this embodiment, the housing 200 is screwed to the base plate 300 and sealed with a gasket to form a closed compression chamber 100, in which a vacuum state is formed, and the concave mirror assembly 210, the inlet mirror assembly 220 and the outlet mirror assembly 230 are disposed inside the compression chamber 100. The front end of the cover body 200 of the device is provided with an incident window 120, laser enters the compression chamber 100 through the incident window 120, and it should be noted that after the laser enters the compression chamber 100 through the incident window 120, the incident laser is guided into the concave mirror assembly 210 through the guiding mirror assembly 220 at a preset angle, and is reflected to the guiding mirror assembly 230 for multiple times in an optical cavity formed by the concave mirror assembly 210, and the laser is guided out through the guiding mirror assembly 230 and finally is emitted out of the cavity through the exit window 130. Handles 400 are symmetrically arranged at the front side and the rear side of the top end of the cover body 200, so that the cover body 200 can be opened to adjust all components in the compression cavity 100.
It should be noted that, because the ionization threshold of the gas is much higher than that of the solid material, which is suitable for the nonlinear compression of the laser system with high peak power, the two sides of the bottom plate 300 are symmetrically provided with the outer gas ports 600, the top end of the bottom plate 300 is provided with the inner gas port 700, and the inner gas ports and the outer gas ports are communicated through the pipeline 800, so as to achieve the purpose of filling the gas into the vacuum chamber. Wherein, the quantity of inside and outside gas port is the same, is a plurality of, can carry out nimble change to the quantity of inside and outside gas port according to actual conditions, and the spare gas port is sealed can. It should be noted that the gas filled in the compression cavity 100 is an inert gas, specifically, helium, krypton, etc., and different gases have different nonlinear refractive indexes, so that the amount of broadening of the laser spectrum can be changed by changing the type of the gas in the cavity and the gas pressure and changing the accumulation amount of the nonlinear effect of the laser single-pass interaction, and the detection of the gas pressure in the cavity can be realized by connecting a barometer to the external gas port 600.
It should be noted that, by arranging the outer air port 600 and the inner air port 700 on the bottom plate 300, the vibration and drift of each component and light path in the chamber caused by excessive air flow during the inflation and deflation process can be effectively avoided, thereby improving the stability and repeatability of the device.
In one embodiment, the exit window 130 and the entrance window 120 have the same structure, the entrance window 120 is disposed at a position of the cover 200 close to the bottom plate 300, and the exit window 130 and the entrance window 120 are centrosymmetric.
In this embodiment, the window sheets of the exit window 130 and the entrance window 120 are both coated with high transmittance films, so that the laser transmission loss can be effectively reduced.
In one embodiment, the concave mirror assembly 210 includes a first concave mirror 111 and a second concave mirror 112, and the second concave mirror 112 has the same structure as the first concave mirror 111 and is symmetrically disposed at the front and rear sides of the center of the compression chamber 100.
In this embodiment, the first concave mirror 111 and the second concave mirror 112 are coaxially disposed to form an optical cavity, and the laser light is reflected back and forth between the first concave mirror 111 and the second concave mirror 112, so that the optical path of the laser light can be increased, thereby increasing the interaction length of the laser light and the gas, and increasing the accumulation amount of the nonlinear effect. It should be noted that the curvatures of the first concave mirror 111 and the second concave mirror 112 are the same, and the curvatures and the calibers can be changed according to different requirements, so that the first concave mirror and the second concave mirror can be flexibly used.
In one embodiment, lead-in mirror assembly 220 includes a first lead-in mirror 113 and a second lead-in mirror 114; the first introduction mirror 113 is provided on the second concave mirror 112 on the side closer to the incident laser beam; the second introducing mirror 114 is arranged between the first concave mirror 111 and the second concave mirror 112, and the second introducing mirror 114 is positioned at the rear end of the first concave mirror 111 near the position of the incident laser;
in this embodiment, after entering the compression chamber 100 through the entrance window 120, the laser light passes through the first introduction mirror 113 and the second introduction mirror 114 in sequence and is reflected, and enters the optical cavity formed by the first concave mirror 111 and the second concave mirror 112, so as to achieve the purpose of reflecting the laser light back and forth.
In one particular embodiment, the exit mirror assembly 230 includes a first exit mirror 115 and a second exit mirror 116; the first leading-out mirror 115 and the second leading-in mirror 114 have the same structure, the first leading-out mirror 115 is arranged between the first concave mirror 111 and the second concave mirror 112, and the first leading-out mirror 115 is positioned at the position, close to the position of the outgoing laser, of the second concave mirror 112; the second exit mirror 116 has the same structure as the first entrance mirror 113, and the second exit mirror 116 is disposed on the side of the second concave mirror 112 close to the emitted laser beam.
In this embodiment, the laser beam that has sufficiently acted on the gas sequentially passes through the first exit mirror 115 and the second exit mirror 116 to be reflected, and then exits the cavity through the exit window 130, and then the laser pulse is compressed by combining the dispersion compensation technique.
In one embodiment, the compression chamber lumen is further provided with a first connector 170; the number of the first connecting members is five, one end of each of the five first connecting members 170 is connected to the first concave mirror 111, the first introduction mirror 113, the second introduction mirror 114, the first exit mirror 115, and the second exit mirror 116, and the other end is connected to the base plate 300.
In this embodiment, the first concave mirror 111, the first introduction mirror 113, the second introduction mirror 114, the first derivation mirror 115, and the second derivation mirror 116 are all connected to the base plate 300 by the first connection member 170. Specifically, the first connector 170 is a vacuum frame. The first concave mirror 111, the first introduction mirror 113, the second introduction mirror 114, the first lead-out mirror 115, and the second lead-out mirror 116 are optical elements made of glass, and the actual use environment in the chamber is vacuum, so that the vacuum mirror holder is required for the support purpose.
It should be further noted that, the mirror surfaces of the first introduction mirror 113, the second introduction mirror 114, the first concave mirror 111, the second concave mirror 112, the first exit mirror 115, and the second exit mirror 114 are all plated with high-reflectivity plating layers, so that the overall transmission efficiency can reach over 90%, and the transmission efficiency of the laser is effectively improved. Wherein, the high-reflectivity film layer plated on the surface of each reflector corresponds to the wavelength of the incident laser.
In one embodiment, the inner cavity of the compression chamber 100 is further provided with a translation member 160 and a second connection member 180; one end of the second connecting member 180 is connected to one end of the second concave mirror 112, the other end thereof is connected to one end of the translation member 160, and the other end of the translation member 160 is connected to the base plate 300.
In this embodiment, one end of the second connecting member 180 is fixed to the second concave mirror 112, and the other end is fixed to the translating member 160, and then the second connecting member is fixed to the base plate 300 by the translating member 160, wherein the translating member 160 is a one-dimensional translation stage. It should be noted here that the width and pulse width of the output laser spectrum can be flexibly controlled by changing the distance between the first concave mirror 111 and the second concave mirror 112, so that the translation member is provided to finely adjust the distance between the two concave mirrors. Specifically, the translation member 160 is equipped with an adjusting knob, when the knob is rotated clockwise, the second concave mirror 112 moves horizontally leftwards along with the translation member, and when the knob is rotated anticlockwise, the second concave mirror 112 moves horizontally rightwards along with the translation member 160, so that the distance between the two concave mirrors is reduced or increased, and the size of the non-linear effect accumulation amount is flexibly changed.
In one embodiment, the fixing members 500 are disposed on both sides of the bottom plate 300, one end of the fixing member 500 is screwed to be fixedly connected to the bottom plate 300, and the other end thereof can be connected to the optical platform by screwing.
In this embodiment, the fixing member 500 is a pressing block, a through hole is formed in the center of one side of the pressing block and is fixedly connected to the bottom plate by a screw, circular arc-shaped through holes are symmetrically formed in the bottom of the pressing block and are respectively formed by the screws, so that the fixing connection with the optical platform is achieved, and the stability of the device can be effectively improved.
In one embodiment, the front and rear ends of the housing 200 are provided with a first backup window 140 and a second backup window 150; the first spare window 140 and the second spare window 150 are centrosymmetric.
In this embodiment, the laser incident direction can be changed according to different requirements, so that the laser is incident from the first standby window 140 and exits from the second standby window 150, thereby meeting the use requirements of different application scenarios.
In one embodiment, the cover 200 is made of aluminum and the base 300 is made of stainless steel.
In this embodiment, the cover body 200 of the device is made of aluminum, the bottom plate 300 is made of stainless steel, and the two are connected by using screws and sealing rings, so that the air tightness and stability of the device can be guaranteed while the cost is reduced.
In summary, in the further compression process of the laser, the cover 200 and the bottom plate 300 enclose the multi-cavity femtosecond pulse nonlinear compression device to form the closed vacuum compression chamber 100, and the introducing mirror assembly 220, the concave mirror assembly 210 and the deriving mirror assembly 230 are all arranged inside the cavity. Because the ionization threshold of the gas is far higher than that of a solid material and is suitable for the nonlinear compression of a laser system with high peak power, a pipeline 800 is arranged inside the device bottom plate 300 to communicate the outer gas port 600 and the inner gas port 700, and inert gas is filled into the cavity. The laser enters the cavity through the entrance window 120, is guided into the concave mirror assembly 210 at a preset angle by the guide-in mirror assembly 220, is reflected to the guide-out mirror assembly 230 for multiple times in the optical cavity of the concave mirror assembly 210, and is output by the guide-out mirror assembly 230. The kind of gas in the cavity, the gas pressure and the distance between the concave mirrors all affect the accumulation amount of the nonlinear effect, so that the device can be flexibly controlled according to different requirements. The inner and outer air ports are arranged on the bottom plate, so that the vibration and drift of each component and an optical path in the inner cavity of the compression chamber caused by overlarge airflow can be effectively avoided in the air inflation and deflation process, and the stability of the device is improved.
Having described embodiments of the present application, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (10)
1. A femtosecond pulse nonlinear compression device based on a multi-channel cavity is used for realizing nonlinear compression of pulses and is characterized by comprising a cover body and a bottom plate;
the cover body and the bottom plate are enclosed to form a closed compression chamber, and a concave mirror assembly, an inlet mirror assembly and an outlet mirror assembly are arranged in an inner cavity of the compression chamber; the laser is guided into the concave mirror assembly at a preset angle through the guiding mirror assembly, is reflected to the guiding mirror assembly for multiple times in the concave mirror assembly, and is output by the guiding mirror assembly;
the front end of the cover body is provided with an incident window, the rear end of the cover body is provided with an emergent window, and the incident window and the emergent window are arranged oppositely;
the two sides of the bottom plate are symmetrically provided with external air ports, the top of the bottom plate is provided with a plurality of internal air ports, the number of the internal air ports is matched with that of the external air ports, a pipeline is laid between the external air ports and the internal air ports, and the pipeline is communicated with the external air ports and the internal air ports;
handles are symmetrically arranged on the front side and the rear side of the top end of the cover body and are fixedly connected with the cover body.
2. The multi-pass-cavity-based femtosecond pulse nonlinear compression device as recited in claim 1, wherein the exit window and the entrance window are identical in structure, the entrance window is arranged at a position of the cover body close to the bottom plate, and the exit window and the entrance window are in central symmetry.
3. The multi-through cavity-based femtosecond pulse nonlinear compression device as claimed in claim 1, wherein the concave mirror assembly comprises a first concave mirror and a second concave mirror, and the second concave mirror is the same as the first concave mirror in structure and symmetrically arranged at the front side and the rear side of the central position of the compression chamber.
4. The multi-pass cavity based femtosecond pulse nonlinear compression device according to claim 3, wherein the introducer mirror assembly comprises a first introducer mirror and a second introducer mirror;
the first lead-in mirror is arranged on one side, close to the incident laser, of the second concave mirror;
the second leading-in mirror is arranged between the first concave mirror and the second concave mirror, and the second leading-in mirror is positioned at the position, close to the incident laser, of the rear end of the first concave mirror.
5. The multi-pass cavity based femtosecond pulse nonlinear compression device according to claim 4, wherein the derivation mirror assembly comprises a first derivation mirror and a second derivation mirror;
the first leading-out mirror and the second leading-in mirror have the same structure, the first leading-out mirror is arranged between the first concave mirror and the second concave mirror, and the first leading-out mirror is positioned at the position, close to the laser emergent position, of the second concave mirror;
the second leading-out mirror and the first leading-in mirror are identical in structure, and the second leading-out mirror is arranged on one side, close to the emergent laser, of the second concave mirror.
6. The multi-pass cavity based femtosecond pulse nonlinear compression device according to claim 5, wherein a first connector is further arranged in the inner cavity of the compression chamber;
the number of the first connecting pieces is five, one end of each of the five first connecting pieces is connected with the first concave mirror, the first leading-in mirror, the second leading-in mirror, the first leading-out mirror and the second leading-out mirror, and the other end of each of the five first connecting pieces is connected with the bottom plate.
7. The multi-pass cavity based femtosecond pulse nonlinear compression device according to claim 6, wherein the inner cavity of the compression chamber is further provided with a translation piece and a second connecting piece;
one end of the second connecting piece is connected with one end of the second concave mirror, the other end of the second connecting piece is connected with one end of the translation piece, and the other end of the translation piece is connected with the bottom plate.
8. The multi-cavity-based femtosecond pulse nonlinear compression device as claimed in claim 1, wherein fixing pieces are arranged on both sides of the bottom plate, one end of each fixing piece is fixedly connected with the bottom plate through a screw, and the other end of each fixing piece can be connected with an optical platform through a screw.
9. The femtosecond pulse nonlinear compression device based on the multi-pass cavity as recited in claim 1, wherein a first standby window and a second standby window are arranged at the front end and the rear end of the cover body;
the first spare window and the second spare window are in central symmetry.
10. The multi-pass cavity based femtosecond pulse nonlinear compression device according to any one of claims 1 to 9, wherein the cover body is made of aluminum, and the base plate is made of stainless steel.
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| CN202221547234.4U CN217362130U (en) | 2022-06-20 | 2022-06-20 | Femtosecond pulse nonlinear compression device based on multi-pass cavity |
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| CN202221547234.4U CN217362130U (en) | 2022-06-20 | 2022-06-20 | Femtosecond pulse nonlinear compression device based on multi-pass cavity |
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| CN217362130U true CN217362130U (en) | 2022-09-02 |
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| CN202221547234.4U Active CN217362130U (en) | 2022-06-20 | 2022-06-20 | Femtosecond pulse nonlinear compression device based on multi-pass cavity |
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