Device convenient for adjusting resonant cavity of dye laser

Abstract

The utility model discloses a dye laser resonant cavity device convenient to adjust, which comprises a base, a dye cell, a broadening assembly, a grating, a first reflecting mirror, a second reflecting mirror and a ball screw driving assembly, laser beams enter from the dye cell and form a fluorescence spectrum, the fluorescence spectrum is screened by the grating and then enters the first reflecting mirror, and the first reflecting mirror and the second reflecting mirror are connected through the ball screw driving assembly. The first reflector plays a role in tuning, the rotation angle of the first reflector can be adjusted through the motor of the ball screw under the driving of the ball screw, the rotation error is small, the tuning function of different wavelengths is achieved, the system can output different wavelengths, and then the target light source returns to the grating, the broadening assembly and the second reflector. Part of the light is reflected back from the second reflector to form resonance, and part of the light penetrates through the second reflector to amplify the power of the light source after resonance, and the light source is emitted from the light path outlet. The dye laser solves the problems that a resonant cavity of an existing dye laser cannot be adjusted, a grating cannot be replaced, the precision is low, and the occupied space is large.

Description

Technical Field

[0001] The utility model belongs to the technical field of dye lasers, and relates to a device for facilitating the adjustment of a dye laser resonator. Background Art

[0002] A dye laser is a classic single-frequency pulsed tunable laser. The working principle of a dye laser is that a strong laser pulse excites a specific dye to generate a broadband fluorescence spectrum. A grating pair, which is the core device, selects a specific spectral line to generate a single-frequency pulsed laser in a set resonator. This single-frequency laser is further amplified and output as a dye laser. The built-in grating pair can be precisely tuned to achieve specific precise spectral lines. The outstanding feature of a dye laser compared with other lasers is that the laser wavelength is tunable. In order to achieve precise tuning and obtain a narrower linewidth, a resonator with a wavelength selection device is required. Commonly used wavelength selection devices include gratings, prisms, F-P etalons, birefringent filters, distributed feedback devices, electronically tunable elements, etc.

[0003] However, in existing dye lasers, after the resonator is adjusted, the grating becomes stuck and cannot be replaced, resulting in errors that cannot be adjusted. In addition, the overall structure of the existing dye laser resonator is relatively bulky and occupies a large space. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a device for facilitating the adjustment of a dye laser resonator, which solves the problems of the existing dye laser resonator being unable to be adjusted, unable to replace the grating, having low precision, and occupying a large space.

[0005] The technical scheme adopted by the utility model is as follows:

[0006] A dye laser resonator device convenient for adjustment, comprising a base, a dye cell, a broadening component, a grating, a first reflector, a second reflector and a ball screw drive component. A resonator chamber is provided at the top of the base, and the resonator chamber is provided with an optical path outlet. The dye cell, the broadening component, the grating, the first reflector and the second reflector are all built in the resonator chamber. The dye cell receives a laser beam and generates a fluorescence spectrum. The fluorescence spectrum sequentially passes through the broadening component, the grating and the first reflector. The grating is detachably connected with an adjustment mechanism. The first reflector is adapted to reflect the received target light source back to the grating along the original path. The target light source sequentially passes through the grating, the broadening component, the dye cell and the second reflector to form resonance. A part of the target light source is reflected by the second reflector and another part passes through the second reflector. The second reflector is connected with an adjustment mirror holder. The broadening component is adapted to thicken the target light source. The drive block of the ball screw drive component is connected with the first reflector through a crank arm to drive the first reflector to rotate and adjust the incident angle. The crank arm is rotatably connected to the inner wall of the resonator chamber.

[0007] Further, the drive motor of the ball screw drive component is a servo motor.

[0008] Further, the grating is bolted to the adjustment mechanism.

[0009] Further, the grating is snap-connected to the adjustment mechanism.

[0010] Further, the first reflector is a strip-shaped reflector.

[0011] Further, the broadening component includes a plurality of right-angled triangular prisms arranged in sequence along the light path.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] The resonant cavity device of the present utility model includes a base, a dye cell, a broadening component, a grating, a first reflector, a second reflector, and a ball screw drive component. During operation, a laser beam enters from the front of the dye cell, and the formed fluorescence spectrum passes through the grating. The adjusting mechanism can adjust the grating and can replace the grating. The grating plays a role in screening wavelengths. Then it enters the first reflector. For the first reflector, the first-order diffracted light of different wavelengths has different incident angles. Therefore, when the first reflector is rotated so that the incident angle of a certain wavelength is zero, the light of this wavelength can return to the resonant cavity with low loss and form oscillations. The first reflector thus plays a tuning role. Driven by the ball screw, the rotation angle of the first reflector can be adjusted by the motor of the ball screw, with a small rotation error, realizing the tuning function for different wavelengths, enabling the system to output different wavelengths. After that, the target light source returns to the grating, the broadening component, and the second reflector. Part of the light is reflected back from the second reflector to form resonance, and part of the light passes through the second reflector, and the light source with amplified power after resonance is emitted from the optical path outlet. Under the condition of outputting the same power, the space occupation is small. This application solves the problems of the existing dye laser resonant cavity being unable to be adjusted, unable to replace the grating, having low precision, and large space occupation. Description of the Drawings

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings, where:

[0015] Figure 1 It is a schematic structural diagram of a device for facilitating the adjustment of a dye laser resonant cavity according to an embodiment of the present utility model;

[0016] Figure 2 It is a rear view of a device for facilitating the adjustment of a dye laser resonant cavity according to an embodiment of the present utility model.

[0017] Markings in the figure:

[0018] 10 - Base; 11 - Resonant cavity chamber;

[0019] 20 - Dye cell;

[0020] 30 - Broadening component; 31 - Right-angled triangular prism;

[0021] 40 - Grating; 41 - Adjusting mechanism;

[0022] 50 - First reflector;

[0023] 60 - Second reflector; 61 - Adjusting mirror mount

[0024] 70 - Ball screw drive assembly; 71 - Drive block; 72 - Crank arm. Detailed implementation mode

[0025] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model, that is, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Usually, the components of the embodiments of the present utility model described and shown in the accompanying drawings herein can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents the selected embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present utility model.

[0027] It should be noted that relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0028] As described in the background art, however, in existing dye lasers, after adjusting the resonant cavity, the grating becomes stuck and cannot be replaced, resulting in errors that cannot be adjusted. In addition, the overall structure of the resonant cavity of existing dye lasers is relatively bulky and occupies a large space.

[0029] Based on this, the inventor created a device for facilitating the adjustment of the resonant cavity of a dye laser in this application to solve the above technical problems.

[0030] The features and performance of the present utility model will be further described in detail below in conjunction with the embodiments.

[0031] Embodiment

[0032] Please refer to Figure 1 、Figure 2 , a dye laser resonator device convenient for adjustment, comprising a base 10, a dye cell 20, a broadening component 30, a grating 40, a first reflector 50, a second reflector 60 and a ball screw drive component 70. A resonator chamber 11 is provided at the top of the base 10, and the resonator chamber 11 is provided with an optical path outlet. For example, the optical path outlet can be a round hole. The dye cell 20, the broadening component 30, the grating 40, the first reflector 50 and the second reflector 60 are all built into the resonator chamber 11. The dye cell 20 receives a laser beam and generates a fluorescence spectrum, and the fluorescence spectrum sequentially passes through the broadening component 30, the grating 40 and the first reflector 50. The grating 40 is detachably connected with an adjusting mechanism 41, and the adjusting mechanism 41 can adjust the grating 40 to screen light of a target wavelength. Since the larger the number of lines of the grating 40, the higher the resolution, the output light wavelength is narrower, which is called a narrow-band laser. On the contrary, it is a wide-band laser. By detachably connecting the grating 40 to the adjusting mechanism 41, when different gratings 40 are replaced, the bandwidth of the resonator can be tuned. For example, the grating 40 can be snap-connected to the adjusting mechanism 41 or bolt-connected to the adjusting mechanism 41, and the present invention is not limited thereto.

[0033] The first reflector 50 is adapted to reflect the received target light source back to the grating 40 along the original path. For example, the first reflector 50 can be a strip-shaped reflector. The target light source forms resonance sequentially through the grating 40, the broadening component 30, the dye cell 20 and the second reflector 60. A part of the target light source is reflected from the second reflector 60 and another part passes through the second reflector 60. The second reflector 60 is connected with an adjusting mirror holder 61. The broadening component 30 is adapted to thicken the target light source. For example, the broadening component 30 can include a plurality of right-angled triangular prisms 31 arranged in sequence along the light, or can be a cylindrical mirror, and the present invention is not limited thereto. The driving block 71 of the ball screw drive component 70 is connected with the first reflector 50 through a crank arm 72 to drive the first reflector 50 to rotate and adjust the incident angle, and the crank arm 72 is rotatably connected to the inner wall of the resonator chamber 11. Here, that is to say, when the motor of the ball screw drive component 70 drives the driving block 71 to move along the screw, the crank arm 72 is driven to rotate, thereby driving the first reflector 50 to rotate and adjust the angle.

[0034] The resonant cavity device of the present utility model includes a base 10, a dye cell 20, a broadening component 30, a grating 40, a first reflector 50, a second reflector 60, and a ball screw drive component 70. During operation, a laser beam enters from the front of the dye cell 20, and the formed fluorescence spectrum passes through the grating 40. The adjusting mechanism 41 can adjust the grating 40 and can replace the grating 40. The grating 40 functions to screen wavelengths, and then enters the first reflector 50. For the first reflector 50, the first-order diffracted light of different wavelengths has different incident angles. Thus, when the first reflector 50 is rotated so that the incident angle of a certain wavelength is zero, the light of this wavelength can return to the resonant cavity with low loss and form an oscillation. The first reflector 50 then plays a tuning role. Driven by the ball screw, the rotation angle of the first reflector 50 can be adjusted by the motor of the ball screw, with a small rotation error, realizing the tuning function for different wavelengths, enabling the system to output different wavelengths. After that, the target light source returns through the grating 40, the broadening component 30, and the second reflector 60. Part of the light is reflected back by the second reflector 60 to form resonance, and part of the light passes through the second reflector 60, and the light source with amplified power after resonance is emitted from the optical path outlet. Under the condition of outputting the same power, the space occupation is small. This application solves the problems that the resonant cavity of the existing dye laser cannot be adjusted, the grating 40 cannot be replaced, the accuracy is low, and the space occupation is large.

[0035] In another embodiment, the drive motor of the ball screw drive component 70 is a servo motor. With such a setting, the rotation of the servo motor can be controlled by software, thereby driving the screw to rotate and finally driving the bar-shaped reflector to rotate, so as to achieve precise control of the rotation angle of the first reflector 50 and reduce the rotation error.

[0036] The above are only the preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. Any modifications, equivalent replacements, and improvements made by those skilled in the art within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A dye laser resonant cavity device that is easy to adjust, characterized in that: The invention comprises a base, a dye pool, a widening component, a grating, a first reflector, a second reflector and a ball screw drive component. A resonant cavity is arranged on the top of the base, and an optical path outlet is arranged in the resonant cavity. The dye pool, the widening component, the grating, the first reflector and the second reflector are all built in the resonant cavity. The dye pool receives a laser beam and generates a fluorescence spectrum, and the fluorescence spectrum passes through the widening component, the grating and the first reflector in sequence. The grating is detachably connected with an adjustment mechanism. The first reflector is suitable for reflecting the received target light source to the grating along the original path. The target light source passes through the grating, the widening component, the dye pool and the second reflector in sequence to form resonance. Part of the target light source is reflected from the second reflector and another part passes through the second reflector. The second reflector is connected with an adjustment mirror frame. The widening component is suitable for thickening the target light source. The driving block of the ball screw drive component is connected with the first reflector through a curved arm to drive the first reflector to rotate and adjust the incident angle. The curved arm is rotatably connected to the inner wall of the resonant cavity.

2. The dye laser resonant cavity device that is easy to adjust according to claim 1, characterized in that: The driving motor of the ball screw driving assembly is a servo motor.

3. The dye laser resonant cavity device that is easy to adjust according to claim 1, characterized in that: The grating is connected to the adjustment mechanism by bolts.

4. The dye laser resonant cavity device that is easy to adjust according to claim 1, characterized in that: The grating is snap-connected to the adjustment mechanism.

5. The dye laser resonant cavity device that is easy to adjust according to claim 1, characterized in that: The first reflector is a strip reflector.

6. The dye laser resonant cavity device that is easy to adjust according to claim 1, characterized in that: The widening component includes a plurality of right-angle prisms arranged in sequence along the light.

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