Light path system of Q-switched crystal and laser

Abstract

The invention relates to an optical path system based on a Q-switched crystal and a laser, the optical path system based on the Q-switched crystal comprises a pumping source, a working crystal, the Q-switched crystal, an output film and a total reflective mirror, the output film is attached to the side, away from the pumping source, of the Q-switched crystal, a resonant cavity is formed between the total reflective mirror and the output film, the working crystal and the Q-switched crystal are both located in the resonant cavity, and the working crystal is located in the resonant cavity. The pumping source is used for emitting pumping light, the working crystal is used for converting the pumping light, and the Q-switched crystal is used for compressing pulse width; wherein pumping light emitted by the pumping source sequentially passes through the total reflective mirror, the working crystal, the Q-switched crystal and the output film and is reflected in the resonant cavity to form laser resonance, the laser resonance is emitted from the output film, and laser output characteristics are accurately controlled under occasions, environments and working conditions with different requirements.

Description

Technical Field

[0001] The present application relates to the field of lasers, and in particular, to an optical path system based on a Q-switched crystal and a solid-state laser. Background Art

[0002] Lasers are devices that can generate laser light by amplifying stimulated emission of radiation, and have important applications in many fields. When the laser pump source and gain medium are working, they often require the laser output to be stable and the output wavelength of the laser to be accurately controlled.

[0003] However, in different environments and working conditions, the laser needs to adjust its operating parameters to maintain optimal performance. Especially for some high-precision occasions, it is difficult for existing solid-state lasers to effectively adjust and control the output characteristics of the laser. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide an optical path system and a solid-state laser based on a Q-switched crystal to solve the problem that it is difficult to effectively adjust and control the output characteristics of the laser in existing solid-state lasers.

[0005] In order to solve the above problems, the present application adopts the following technical solutions:

[0006] The present application provides an optical path system based on a Q-switched crystal, comprising: a pump source, a working crystal, a Q-switched crystal, an output film and a total reflection mirror, wherein the output film is attached to a side of the Q-switched crystal away from the pump source, a resonant cavity is formed between the total reflection mirror and the output film, the working crystal and the Q-switched crystal are both located in the resonant cavity, the pump source is used to emit pump light, the working crystal is used to convert pump light, and the Q-switched crystal is used to compress pulse width; wherein the pump light emitted by the pump source passes through the total reflection mirror, the working crystal, the Q-switched crystal and the output film in sequence, and is reflected in the resonant cavity to form laser resonance, and the laser after laser resonance is emitted from the output film.

[0007] Furthermore, the optical path system comprises a Q-switching rotating member and a mounting seat, and the working crystal, the Q-switching crystal and the Q-switching rotating member are all located on the mounting seat.

[0008] Furthermore, one of the mounting seat and the Q-switched crystal is provided with a groove, and the other is provided with a protrusion adapted to the groove.

[0009] Furthermore, the groove and the protrusion are both hemispherical.

[0010] Furthermore, the Q-switched crystal is one of a BBO crystal and a LBO crystal.

[0011] Furthermore, the Q-switching crystal is bonded to the output film.

[0012] Furthermore, the working crystal is one of Nd:YAG crystal and Nd:YLF crystal.

[0013] The present application also provides a solid-state laser, comprising any one of the above-mentioned Q-switched crystal-based optical path systems.

[0014] Compared with the prior art, the beneficial effect of the present application is that: the output film is attached to the side of the Q-switched crystal away from the pump source, a resonant cavity is formed between the total reflection mirror and the output film, the working crystal and the Q-switched crystal are both located in the resonant cavity, the pump source is used to emit pump light, the working crystal is used to convert the pump light, the Q-switched crystal is used to compress the pulse width, the pump light emitted by the pump source passes through the total reflection mirror, the working crystal, the Q-switched crystal and the output film in sequence to form laser resonance, so as to accurately control the laser output characteristics under different demand environments and working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 An optical path diagram of an optical path system based on a Q-switched crystal provided in an embodiment of the present application;

[0016] Figure 2 A schematic diagram of the structure of a solid-state laser provided in an embodiment of the present application.

[0017] Description of reference numerals:

[0018] 1. Pump source; 2. Working crystal; 3. Q-switched crystal; 4. Output membrane; 5. Total reflection mirror; 6. Mounting seat; 7. Q-switched rotating part; P, groove; Q, protrusion. DETAILED DESCRIPTION

[0019] The specific implementation methods of the present application are described in detail below with reference to the accompanying drawings.

[0020] It should be noted that, in the absence of conflict, the embodiments and technical features in the embodiments of the present application can be combined with each other, and the detailed description in the specific implementation method should be understood as an explanation of the purpose of the present application and should not be regarded as an improper limitation on the present application.

[0021] It should be understood that the orientation or position relationship is based on the orientation or position relationship shown in the drawings. These orientation terms are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application.

[0022] Figure 1 An optical path diagram of an optical path system based on a Q-switched crystal provided in an embodiment of the present application, Figure 2A schematic diagram of the structure of a solid-state laser provided in an embodiment of the present application.

[0023] like Figure 1 and Figure 2 As shown, an embodiment of the present application provides an optical path system based on a Q-switched crystal, comprising: a pump source 1, a working crystal 2, a Q-switched crystal 3, an output film 4 and a total reflection mirror 5, wherein the output film 4 is attached to the side of the Q-switched crystal 3 away from the pump source 1, a resonant cavity is formed between the total reflection mirror 5 and the output film 4, the working crystal 2 and the Q-switched crystal 3 are both located in the resonant cavity, the pump source 1 is used to emit pump light, the working crystal 2 is used to convert pump light, and the Q-switched crystal 3 is used to compress pulse width; wherein the pump light emitted by the pump source 1 passes through the total reflection mirror 5, the working crystal 2, the Q-switched crystal 3 and the output film 4 in sequence, and is reflected in the resonant cavity to form laser resonance, so as to form laser resonance, and the laser is emitted from the output film after the laser resonance.

[0024] Specifically, the pump source 1 is placed on one side of the working crystal 2. After the pump light passes through the working crystal 2, the working crystal 2 is stimulated to radiate. The Q-switched crystal 3 is placed on the other side of the working crystal 2. The output film 4 is attached to the side of the Q-switched crystal 3 away from the pump source 1 to form a resonant cavity together. The Q-switched crystal 3 is used to achieve compression and enhancement of laser pulses. The output film 4 is a semi-transparent film, and it is attached to the side of the Q-switched crystal 3 away from the pump source 1. The total reflection mirror 5 is a high reflection mirror. The total reflection mirror 5 is located at one end of the resonant cavity close to the pump source. The total reflection mirror 5 is used to reflect the pump light back to the resonant cavity for resonance. For example, the Q-switched crystal 3 is one of a BBO crystal or an LBO crystal. BBO and LBO crystals have different optical properties and damage thresholds. They are optimized and selected for specific application scenarios to improve the quality of laser output. It should be noted that in order to achieve high stability and high efficiency laser output, the distance between the total reflection mirror 5 and the output film 4 is adjusted, and suitable media and crystals are selected. In particular, the working crystal is one of Nd:YAG crystal and Nd:YLF crystal. Since both Nd:YAG and Nd:YLF crystals are high-power laser media, they can effectively absorb pump light and convert it into laser output, thereby improving the laser output power.

[0025] Through the Q-switched crystal 3, the laser output characteristics can be adjusted under different demand occasions, environments and working conditions. A resonant cavity is formed between the pump source 1, the working crystal 2, the Q-switched crystal 3, the total reflection mirror 5 and the output film 4 to enhance the laser output. The pump source 1, the working crystal 2, the Q-switched crystal 3 and the resonant cavity are in a compact system, which is conducive to reducing the size of the equipment.

[0026] In some embodiments, the optical path system includes a Q-switching rotating member 7 and a mounting seat 6 , and the working crystal 2 , the Q-switching crystal 3 and the Q-switching rotating member 7 are all located on the mounting seat 6 .

[0027] Specifically, the mounting seat 6 supports the Q-switching rotating member 7 and the working crystal 2 and the Q-switching crystal 3. The mounting seat 6 has good thermal stability and vibration isolation performance to ensure that the laser can maintain stable performance under various environments and working conditions. The Q-switching rotating member 7 adjusts the rotation of the Q-switching crystal 3 to meet the needs of laser emission. For example, the Q-switching rotating member 7 is a bolt or a screw. After adjusting the position of the Q-switching crystal 3, tighten the bolt or screw; or drive the Q-switching crystal 3 to rotate by screwing in different lengths of the bolt or screw, so as to meet the position requirements of the Q-switching crystal 3, and then control the laser output. The working crystal 2, the Q-switching crystal 3 and the Q-switching rotating member 7 are aligned on the mounting seat 6 to form an optical path. The Q-switching rotating member 7 is adjusted to drive the Q-switching crystal 3 and the output film 4 to rotate, so as to adjust the position or posture of the Q-switching crystal 3 and the output film 4, and then control the laser output.

[0028] In some embodiments, one of the mounting seat 6 and the Q-switched crystal 3 is provided with a groove P, and the other is provided with a protrusion Q adapted to the groove P.

[0029] Specifically, a groove P is provided on one side of the Q-switching crystal 3, and the shape and size of the groove P are adapted to the protrusion Q, and the protrusion Q is provided on the mounting seat 6. The shape, size and position of the protrusion Q match the groove P to ensure that they can be accurately aligned and contacted. The Q-switching crystal 3 is mounted on the mounting seat 6, with the groove P facing the protrusion Q of the Q-switching crystal 3, and the working crystal 2 is mounted on the other side of the mounting seat 6. The Q-switching rotating member 7 is rotated to drive the Q-switching crystal 3 and the output film 4 to rotate, thereby controlling the laser output.

[0030] In some embodiments, the groove P and the protrusion Q are both hemispherical, a hemispherical groove P is processed on one side of the Q-switched crystal 3, and the hemispherical shape of the groove can accurately match the protrusion Q on the mounting seat 6. The mounting seat 6 is processed with a hemispherical protrusion Q, and the shape of the protrusion Q matches the groove P on the Q-switched crystal 3 to ensure that they can be accurately aligned and contacted. By providing the hemispherical groove P and the protrusion Q, fast and accurate alignment is achieved, the adjustment time is reduced, the work efficiency is improved, and the adjustment accuracy is improved.

[0031] In some embodiments, the Q-switched crystal 3 is bonded to the output film 4, and the Q-switched crystal 3 is a Q-switched crystal with high optical quality and high stability, such as Nd:YAG or Nd:YLF crystal. The output film 4 is a semi-transparent film with high reflectivity on one side and low reflectivity on the other side. Before bonding, the bonding surfaces of the Q-switched crystal 3 and the output film 4 are cleaned to remove impurities such as dust, oil and moisture on the surface to ensure the bonding effect, and epoxy resin is applied to the bonding surfaces of the Q-switched crystal 3 and the output film 4. Appropriate pressure is applied to ensure that the bonding surfaces of the Q-switched crystal 3 and the output film 4 are in close contact. After bonding, the bonded Q-switched crystal 3 and the output film 4 are installed in the laser system for performance testing. The test content includes laser output power, stability, threshold, etc. to ensure the normal operation of the laser. By bonding the Q-switched crystal 3 to the output film 4, the structure of the optical path system can be simplified, the system complexity can be reduced, and the stability can be improved.

[0032] An embodiment of the present application also provides a solid-state laser, comprising any one of the above-mentioned Q-switched crystal-based optical path systems.

[0033] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit the same. Although the present application has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to replace some of the technical features therein by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions claimed to be protected by the present application.

Claims

1. An optical path system based on a Q-switched crystal, characterized in that: include: A pump source, a working crystal, a Q-switched crystal, an output film and a total reflection mirror, wherein the output film is attached to a side of the Q-switched crystal away from the pump source, a resonance cavity is formed between the total reflection mirror and the output film, the working crystal and the Q-switched crystal are both located in the resonance cavity, the pump source is used to emit pump light, the working crystal is used to convert pump light, and the Q-switched crystal is used to compress pulse width; wherein the pump light emitted by the pump source passes through the total reflection mirror, the working crystal, the Q-switched crystal and the output film in sequence, and is reflected in the resonance cavity to form laser resonance, and the laser is emitted from the output film after resonance.

2. The optical path system based on Q-switched crystal according to claim 1, characterized in that: The optical path system comprises a Q-switching rotating member and a mounting seat, and the working crystal, the Q-switching crystal and the Q-switching rotating member are all located on the mounting seat.

3. The optical path system based on Q-switched crystal according to claim 2, characterized in that: One of the mounting seat and the Q-switched crystal is provided with a groove, and the other is provided with a protrusion matched with the groove.

4. The optical path system based on Q-switched crystal according to claim 3, characterized in that: The groove and the protrusion are both hemispherical.

5. The optical path system based on Q-switched crystal according to claim 2, characterized in that: The Q-switched crystal is a BBO crystal or a LBO crystal.

6. The optical path system based on Q-switched crystal according to claim 1, characterized in that: The Q-switching crystal is bonded to the output film.

7. The optical path system based on Q-switched crystal according to claim 1, characterized in that: The working crystal is one of Nd:YAG crystal and Nd:YLF crystal.

8. A solid-state laser, characterized in that: An optical path system based on a Q-switched crystal comprising any one of claims 1-7.

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