CN219496860U - Compression device of femtosecond pulse - Google Patents

Abstract

The utility model discloses a compression device of femtosecond pulses, and relates to the technical field of femtosecond pulses. The utility model comprises a top cover, an inserting block and a rectangular base, wherein the top surface of the rectangular base is provided with a groove with two ends penetrating in the diagonal direction, and the inserting block is matched with the middle of the groove in a clearance way; the middle top surface of the inserting block is provided with inserting grooves, a plurality of groups of clamping grooves are arranged on the side wall of the inserting block at the position of the inserting grooves along the horizontal sideline direction in an array mode, one group of clamping grooves are used for sliding insertion of the same sheet body used for nonlinear spectrum broadening, and the sheet body used for nonlinear spectrum broadening is arranged in parallel with the side wall of the groove. The utility model can realize that the light beam keeps Brewster angle incidence and the gap among a plurality of elements for nonlinear spectrum broadening is flexibly and conveniently adjusted, and the femtosecond pulse compression operation is simple and has good practicability.

Description

Compression device of femtosecond pulse

Technical Field

The utility model belongs to the technical field of femtosecond pulses, and particularly relates to a compression device of the femtosecond pulses.

Background

The femtosecond optical pulse has wide application, and the application of the femtosecond optical pulse comprises optical frequency measurement, high-resolution atomic clock, signal processing, accurate ranging and astronomy, and under the same power, the narrower femtosecond pulse has higher peak power and is favored by wide application, so that the realization of the narrower femtosecond pulse has important significance. The compression of high-energy femtosecond pulses is a common mode for obtaining pulses below 100 femtoseconds in the industry by adopting elements for nonlinear spectrum broadening, and the compression mode has certain requirements on the arrangement angle of the elements for nonlinear spectrum broadening and the interval between quartz plates.

First, the femtosecond laser beam is to be incident on the element for nonlinear spectrum broadening at Brewster angle; secondly, the interval of the quartz plates is adjusted according to the size of the incident light spot, the incident pulse width and the energy.

However, when the existing compression femtosecond pulse is performed, a bracket is often manually placed on an optical platform, and elements for nonlinear spectrum broadening are placed on the bracket, and one bracket can only place one element for nonlinear spectrum broadening, so that the placement angle of each element for nonlinear spectrum broadening (to meet Brewster angle incidence) and the interval between the elements for nonlinear spectrum broadening need to be independently adjusted, manual debugging is very troublesome and has limited precision, and repeated realization is difficult.

Accordingly, there is a need for improvements in the art to address the above-described problems.

Disclosure of Invention

The utility model aims to provide a compression device for femtosecond pulses, which can realize that light beams keep Brewster angle incidence and is convenient for inter-element gap adjustment for nonlinear spectrum broadening, and solves the problems that the existing compression device for the femtosecond pulses is inconvenient in incident angle adjustment and inconvenient in element interval adjustment for nonlinear spectrum broadening in actual use.

In order to solve the technical problems, the utility model is realized by the following technical scheme:

the utility model relates to a femtosecond pulse compression device, which comprises a top cover, an inserting block and a rectangular base, wherein a groove with two ends penetrating through is formed in the top surface of the rectangular base along the diagonal direction, and the inserting block is in clearance fit with the middle of the groove;

the middle top surface of the inserting block is provided with inserting grooves, a plurality of groups of clamping grooves are arranged on the side wall of the inserting block at the position of the inserting grooves along the horizontal sideline direction in an array mode, one group of clamping grooves are used for sliding insertion of the same sheet body used for nonlinear spectrum broadening, and the sheet body used for nonlinear spectrum broadening is arranged in parallel with the side wall of the groove.

Further, the width of the clamping groove is 2mm, and the interval between two adjacent clamping grooves is 1mm.

Further, the thickness of the sheet body for nonlinear spectral broadening is 1mm or/and 2mm.

Further, the sheet body for nonlinear spectrum broadening is a quartz sheet or a sapphire sheet.

Further, a top cover is arranged above the insertion block, a locking through hole is formed in the top cover at the position of the sheet body for nonlinear spectrum broadening, the locking through hole is used for spiral matching of a locking bolt, and one end of the locking bolt is abutted against the top surface of the sheet body for nonlinear spectrum broadening.

Further, first threaded through holes are formed in two sides of the top cover, first threaded blind holes are coaxially formed in the inserting blocks at the positions of the first threaded through holes, and the first threaded blind holes and the first threaded through holes are fixed in a matched mode through fixing bolts.

Further, a second threaded through hole is formed in the insertion block, a second threaded blind hole is coaxially formed in the rectangular base at the position of the second threaded through hole, and the second threaded blind hole and the second threaded through hole are fixed in a matched mode through a fixing bolt.

Further, the top surfaces of the other two corner positions of the rectangular base which is provided with the grooves are provided with positioning grooves.

The utility model has the following beneficial effects:

1. when the utility model is used, through the arrangement of the plurality of clamping grooves arranged in the array along the same direction, the sheet bodies for nonlinear spectrum broadening are all kept at the same angle, so that when the light beam is vertically incident with the edge of the rectangular base, when the first sheet body for nonlinear spectrum broadening is at the Brewster angle after the light beam is incident, the angles of the other sheet bodies for nonlinear spectrum broadening and the light beam are all at the Brewster angle, thereby avoiding the one-by-one adjustment of staff.

2. When the device is used, through the arrangement of the plurality of clamping grooves arranged in the same direction in an array manner, a worker can selectively insert the sheet bodies for nonlinear spectrum broadening into the plurality of clamping grooves, so that the flexible adjustment of the spacing of the sheet bodies for nonlinear spectrum broadening is realized, the arrangement and adjustment mode is convenient, and the labor intensity of the worker is effectively reduced.

Of course, it is not necessary for any one product to practice the utility model to achieve all of the advantages set forth above at the same time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the overall structure of a compression device for femtosecond pulses;

FIG. 2 is an exploded view of the structure of FIG. 1;

fig. 3 is a perspective view of the device with light incident.

In the drawings, the list of components represented by the various numbers is as follows:

1. a top cover; 2. inserting blocks; 3. a plate for nonlinear spectral broadening; 4. a rectangular base; 101. locking the through hole; 102. a first threaded through hole; 201. a first threaded blind hole; 202. a second threaded through hole; 203. a clamping groove; 401. a positioning groove; 402. a groove; 403. and a second threaded blind hole.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.

Referring to fig. 1 and 2, the present utility model is a compression device for femtosecond pulse, which comprises a top cover 1, an insert block 2 and a rectangular base 4, wherein a groove 402 with two ends penetrating is formed on the top surface of the rectangular base 4 along the diagonal direction, and the insert block 2 is in clearance fit in the groove 402;

the top surface of the middle part of the inserting block 2 is provided with a slot, the side wall of the inserting block 2 at the slot position is provided with a plurality of groups of clamping grooves 203 along the horizontal sideline direction, one group of clamping grooves 203 are used for sliding insertion of the same sheet body 3 for nonlinear spectrum broadening, the interval between the sheet bodies 3 for nonlinear spectrum broadening can be flexibly and adjustably in millimeter magnitude, the debugging process is simple and easy to reproduce, and the sheet bodies 3 for nonlinear spectrum broadening and the side wall of the groove 402 are arranged in parallel.

The width of each clamping groove 203 is 2mm, and the interval between two adjacent clamping grooves 203 is 1mm so as to meet millimeter-order interval adjustment;

the thickness of the sheet body 3 for nonlinear spectrum broadening is 1mm or/and 2mm, and the sheet body 3 for nonlinear spectrum broadening is a quartz sheet or a sapphire sheet;

in use, when the beam of light is at the brewster angle with the first plate 3 for nonlinear spectral broadening, the beam of light is at the brewster angle with each plate 3 for nonlinear spectral broadening after injection, as shown in fig. 3, γ is the incident beam, and α is the brewster angle.

As shown in fig. 2, a top cover 1 is arranged above the insert block 2, a locking through hole 101 is formed in the top cover 1 at the position of the sheet body 3 for nonlinear spectrum broadening, the locking through hole 101 is used for screw fit of a locking bolt, and one end of the locking bolt is abutted against the top surface of the sheet body 3 for nonlinear spectrum broadening, so that limiting and fixing of the sheet body 3 for nonlinear spectrum broadening can be realized;

the two sides of the top cover 1 are provided with first threaded through holes 102, the plug block 2 at the position of the first threaded through holes 102 is coaxially provided with first threaded blind holes 201, and the first threaded blind holes 201 and the first threaded through holes 102 are matched and fixed through fixing bolts, so that the detachable connection between the top cover 1 and the plug block 2 can be realized;

the second threaded through hole 202 is formed in the insertion block 2, the second threaded blind hole 403 is coaxially formed in the rectangular base 4 at the position of the second threaded through hole 202, and the second threaded blind hole 403 and the second threaded through hole 202 are matched and fixed through a fixing bolt, so that detachable connection between the insertion block 2 and the rectangular base 4 can be realized;

the top surfaces of the other two corner positions of the rectangular base 4 with the grooves 402 are provided with positioning grooves 401, and the positioning grooves 401 can realize the integral fixation of the device;

when the device is used, a worker firstly realizes the cooperation and fixation between the insert block 2 and the rectangular base 4 through the fixing bolts, then inserts the sheet body 3 for nonlinear spectrum broadening into the clamping groove 203 according to the needs, finally realizes the cooperation and fixation between the insert block 2 and the top cover 1 through the fixing bolts, and after the operation is completed, the whole device is fixed, so that the compression operation of the follow-up femtosecond pulse is facilitated.

The foregoing is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, and any modification, equivalent replacement, and improvement of some of the technical features described in the foregoing embodiments are all within the scope of the present utility model.

Claims (8)

1. A compression device for femtosecond pulses, characterized in that: the novel socket comprises a top cover (1), an inserting block (2) and a rectangular base (4), wherein a groove (402) with two ends penetrating through is formed in the top surface of the rectangular base (4) along the diagonal direction, and the inserting block (2) is in clearance fit in the groove (402);

the middle top surface of the plug block (2) is provided with a slot, a plurality of groups of clamping grooves (203) are arranged on the side wall of the plug block (2) at the slot position along the horizontal sideline direction in an array mode, one group of clamping grooves (203) are used for sliding insertion of the same sheet body (3) used for nonlinear spectrum broadening, and the sheet body (3) used for nonlinear spectrum broadening is arranged in parallel with the side wall of the groove (402).

2. A compression device for femtosecond pulses according to claim 1, wherein the width of the clamping groove (203) is 2mm, and the interval between two adjacent clamping grooves (203) is 1mm.

3. A compression device for femtosecond pulses according to claim 1 or 2, wherein the thickness of the sheet body (3) for nonlinear spectral broadening is 1mm or/and 2mm.

4. A compression device for femtosecond pulses according to claim 3, wherein the sheet body (3) for nonlinear spectral broadening is a quartz sheet or a sapphire sheet.

5. The compression device of femtosecond pulses according to claim 2 or 4, wherein a top cover (1) is arranged above the insert block (2), a locking through hole (101) is formed in the top cover (1) at the position of the sheet body (3) for nonlinear spectrum broadening, the locking through hole (101) is used for screw matching of a locking bolt, and one end of the locking bolt is abutted against the top surface of the sheet body (3) for nonlinear spectrum broadening.

6. The femtosecond pulse compression device according to claim 5, wherein the two sides of the top cover (1) are provided with first threaded through holes (102), the insert block (2) at the position of the first threaded through holes (102) is coaxially provided with first threaded blind holes (201), and the first threaded blind holes (201) and the first threaded through holes (102) are fixed by matching of fixing bolts.

7. The femtosecond pulse compression device according to claim 6, wherein a second threaded through hole (202) is formed in the insert block (2), a second threaded blind hole (403) is coaxially formed in the rectangular base (4) at the position of the second threaded through hole (202), and the second threaded blind hole (403) and the second threaded through hole (202) are fixed in a matched manner through a fixing bolt.

8. The compression device of femtosecond pulse according to claim 1 or 7, wherein positioning grooves (401) are formed on the top surfaces of the other two corner positions of the rectangular base (4) with the grooves (402) formed oppositely.