CN213660862U - Compact nanosecond ultraviolet laser - Google Patents
Compact nanosecond ultraviolet laser Download PDFInfo
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- CN213660862U CN213660862U CN202022810307.1U CN202022810307U CN213660862U CN 213660862 U CN213660862 U CN 213660862U CN 202022810307 U CN202022810307 U CN 202022810307U CN 213660862 U CN213660862 U CN 213660862U
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Abstract
The utility model discloses a compact nanosecond ultraviolet laser, include: the resonant cavity comprises a fundamental frequency generation light path, an ultraviolet generation light path, a light beam separation light path and a Q-switching switch; the fundamental frequency generation optical path is used for generating fundamental frequency laser; the ultraviolet generating light path is used for carrying out frequency doubling on the fundamental frequency laser to generate frequency-doubled laser; performing triple frequency on the frequency-doubled laser to generate ultraviolet laser, and emitting the ultraviolet laser and the residual fundamental frequency laser and frequency-doubled laser; the beam splitting optical path is used for splitting the ultraviolet laser, the residual fundamental frequency laser and the frequency doubling laser, so that the residual fundamental frequency laser still oscillates in the resonant cavity, the residual frequency doubling laser is collected, and the ultraviolet laser is output; the Q-switch is used for outputting nanosecond pulses, so that the ultraviolet laser is output as nanosecond pulses. The utility model discloses can avoid not thorough ultraviolet laser reflection of beam split to return the resonant cavity and damage the crystal medium, can practice thrift the cost again and obtain compact structure.
Description
Technical Field
The utility model relates to a laser technical field especially relates to a compact nanosecond ultraviolet laser.
Background
In laser technology, ultraviolet lasers have important roles in the fields of precision machining, laser weapons, data storage, and scientific research. Particularly in the glass cutting technology, because glass has strong ultraviolet absorption, ultraviolet laser can break molecular bonds of the glass more easily, and the problems of surface edge breakage, material melting and the like can be avoided by cold processing.
The existing frequency doubling technology is divided into two modes of intracavity frequency doubling and extracavity frequency doubling, and the intracavity frequency doubling efficiency is higher than the extracavity frequency doubling because the intracavity energy density is high in the intracavity frequency doubling. When the ultraviolet light is applied to an ultraviolet laser, the ultraviolet light can be obtained by first carrying out frequency doubling on the fundamental frequency light through the nonlinear crystal and then carrying out frequency tripled frequency (or quadrupled frequency). Typical frequency doubling nonlinear crystals include KTP crystals, LBO crystals and the like. The traditional intracavity frequency doubling ultraviolet laser adopts a straight cavity and a coated dichroic mirror mode to separate ultraviolet light, frequency doubling light and fundamental frequency light.
The utility model discloses the people discovers that foretell technique has following technical problem at least:
(1) the reflectivity and the transmissivity of the dichroic mirror are not 100%, a part of ultraviolet light can be reflected on the surface, and the ultraviolet light is reflected in the straight cavity to easily damage the laser crystal.
(2) When a single prism separates ultraviolet light, since the dispersion ratio of the single beam splitter prism is low, a laser with a large length is used for separating ultraviolet light, and the whole structure is not compact enough.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the embodiment of the application provides a compact nanosecond ultraviolet laser, which can prevent incomplete light splitting and ultraviolet light from being reflected back to a resonant cavity to damage a laser crystal, and can save cost to obtain a compact structure.
The embodiment of the application provides a compact nanosecond ultraviolet laser, includes: the resonant cavity comprises a fundamental frequency generation light path, an ultraviolet generation light path, a light beam separation light path and a Q-switching switch;
the fundamental frequency generation optical path is used for generating fundamental frequency laser;
the ultraviolet generating light path is used for carrying out frequency doubling on the fundamental frequency laser to generate frequency-doubled laser; performing triple frequency on the frequency-doubled laser to generate ultraviolet laser, and emitting the ultraviolet laser and the residual fundamental frequency laser and frequency-doubled laser;
the beam splitting optical path is used for splitting the ultraviolet laser, the residual fundamental frequency laser and the frequency doubling laser, so that the residual fundamental frequency laser still oscillates in the resonant cavity, the residual frequency doubling laser is collected, and the ultraviolet laser is output;
the Q-switch is used for outputting nanosecond pulses, so that ultraviolet laser is output as nanosecond pulse ultraviolet laser.
Further, the ultraviolet generating light path sequentially comprises a frequency tripling crystal and a frequency doubling crystal;
the frequency doubling crystal is used for carrying out frequency doubling on the fundamental frequency laser to generate frequency doubling laser;
the frequency tripling crystal is used for performing frequency tripling on frequency doubled laser and residual fundamental frequency laser to generate ultraviolet laser.
Further, the ultraviolet generating light path comprises a light beam shifter, and the light beam shifter is arranged between the frequency doubling crystal and the frequency tripling crystal; and adjusting the position of a light beam focus point on the frequency tripling crystal through the light beam shifter.
Further, the beam splitting optical path comprises a beam splitting prism assembly, and the beam splitting prism assembly and the ultraviolet generating optical path form a V-shaped structure; and separating the ultraviolet laser, the fundamental frequency laser and the frequency doubling laser according to different wavelengths through the light splitting prism assembly.
Further, the fundamental frequency generation optical path comprises a pumping component, a dichroic mirror, a laser crystal, a first resonant cavity reflector and a second resonant cavity reflector;
the pumping assembly is used for generating pumping light;
the dichroic mirror is used for transmitting the pump light and reflecting the fundamental laser emitted by the laser crystal;
under the excitation of pump light, the gain medium of the laser crystal generates population inversion to generate fundamental laser;
the first resonant cavity reflector reflects fundamental frequency laser and frequency multiplication laser;
the second resonant cavity reflector and the first resonant cavity reflector form a flat cavity, and the second resonant cavity reflector reflects fundamental laser.
Further, the Q-switch is placed between the second resonant cavity reflector and the laser crystal, so that the fundamental laser is output as nanosecond pulse laser, and the ultraviolet laser generated by triple frequency is output as nanosecond pulse ultraviolet laser.
Further, the pumping assembly comprises a collimating focusing lens group and a pumping source; the pump source is used for generating pump light; the collimation focusing lens group is used for focusing the pump light in the laser crystal.
Further, the beam splitting optical path further includes a blackbody cavity, and the remaining frequency doubled laser separated by the beam splitting prism assembly is collected through the blackbody cavity.
Further, the beam splitting optical path comprises an ultraviolet reflecting mirror, and the ultraviolet laser separated by the beam splitting prism component is reflected by the ultraviolet reflecting mirror.
The compact nanosecond ultraviolet laser provided in the embodiment of the application has the following technical effects at least:
1. the fundamental frequency generation light path, the ultraviolet generation light path and the light beam separation light path are adopted, so that the crystal medium can be prevented from being damaged when ultraviolet laser is reflected back into the resonant cavity due to incomplete light splitting in the laser light beam, and the fundamental frequency laser can be recycled to oscillate in the resonant cavity, so that the cost is saved, and a compact structural design is obtained.
2. Because the double-frequency crystal and the triple-frequency crystal are adopted, the fundamental laser generates ultraviolet laser under the action of frequency doubling.
3. Due to the adoption of the light splitting prism assembly, the ultraviolet laser, the fundamental frequency laser and the frequency doubling laser are effectively separated, so that the fundamental frequency laser is effectively recycled, the frequency doubling laser is collected, and the ultraviolet laser is output.
4. Because of the adoption of the Q-switch, nanosecond pulse ultraviolet laser is output.
5. The fundamental frequency laser is recovered and then continuously oscillated in the resonant cavity, and the frequency-doubled laser is regarded as the loss in the cavity. And the frequency doubling efficiency is improved to obtain the ultraviolet laser with higher energy density.
Drawings
Fig. 1 is a diagram of a compact nanosecond laser according to an embodiment of the present application;
fig. 2 is a schematic diagram illustrating an operation principle of a beam splitter prism according to an embodiment of the present application.
Reference numerals:
the device comprises a first resonant cavity reflector 1, a frequency doubling crystal 2, a beam shifter 3, a frequency tripling crystal 4, a first beam splitter prism 5, a second beam splitter prism 6, an ultraviolet reflector 7, a blackbody cavity 8, a second resonant cavity reflector 9, a Q-switch 10, a laser crystal 11, a dichroic mirror 12, a collimating focusing lens group 13 and a pumping source 14.
Detailed Description
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
Referring to fig. 1, an embodiment of the present application provides a compact nanosecond ultraviolet laser, including: the resonant cavity comprises a fundamental frequency generation light path, an ultraviolet generation light path, a light beam separation light path and a Q-switch. The fundamental frequency generation optical path is used for generating fundamental frequency laser. The ultraviolet generating light path is used for carrying out frequency doubling on the fundamental frequency laser to generate frequency-doubled laser; performing triple frequency on the frequency-doubled laser to generate ultraviolet laser; and the ultraviolet laser, the residual fundamental frequency laser and the frequency doubling laser are emitted. The beam splitting optical path is used for splitting the ultraviolet laser, the residual fundamental frequency laser and the frequency doubling laser, so that the residual fundamental frequency laser still oscillates in the resonant cavity, the residual frequency doubling laser is collected, and the ultraviolet laser is output; the Q-switch is used for outputting nanosecond pulses, so that the ultraviolet laser is output as nanosecond pulses. The technical scheme of the embodiment can avoid that the crystal medium is damaged when ultraviolet laser is reflected back into the resonant cavity due to incomplete light splitting in the laser beam; the fundamental frequency laser can be recycled to the resonant cavity for oscillation, so that the cost is saved, and a compact structural design is obtained.
The ultraviolet generating light path in the embodiment sequentially comprises a frequency tripling crystal 4 and a frequency doubling crystal 2. The frequency doubling crystal 2 is used for doubling the frequency of the fundamental laser to generate frequency doubled laser. The frequency tripling crystal 4 is used for performing frequency tripling on the frequency doubled laser and the residual fundamental frequency laser to generate ultraviolet laser.
In the technical scheme in this embodiment, frequency doubling and frequency tripling processing is performed on the fundamental laser through the frequency doubling crystal 2 and the frequency tripling crystal 4 to obtain the final ultraviolet laser. In one embodiment, the frequency doubling crystal 2 and the frequency tripling crystal 4 are coaxially and sequentially arranged in the ultraviolet generating light path. Further, when the fundamental laser is incident, the transmission direction of the fundamental laser is not matched with the placing angle of the frequency tripling crystal 4, and the fundamental laser directly enters the frequency doubling crystal 2 to perform frequency doubling after passing through the frequency tripling crystal 4. The fundamental frequency laser generates frequency doubling laser in the frequency doubling crystal 2 due to the matching of the propagation angles, and the frequency doubling efficiency can reach about 50%. The fundamental frequency generation light path comprises a first resonant cavity reflector 1, the frequency doubling laser and the residual fundamental frequency laser emitted by the frequency doubling crystal 2 are reflected by the first resonant cavity reflector 1, and at the moment, when the transmission direction of the frequency doubling laser and the residual fundamental frequency laser is matched with the placing angle of the frequency doubling crystal 2, the frequency doubling treatment is carried out again, and then the frequency doubling laser and the residual fundamental frequency laser enter a frequency tripling crystal 4. Because the generation of the ultraviolet laser can be obtained by sequentially carrying out frequency doubling, frequency tripling/frequency quadrupling on the fundamental frequency laser through the nonlinear crystal, the ultraviolet laser is generated when the frequency doubled laser and the rest fundamental frequency laser carry out frequency tripling treatment in the frequency tripling crystal 4, and the frequency doubled laser carries out frequency tripling treatment. When the frequency tripling crystal 4 is used for frequency tripling, the frequency doubling efficiency cannot reach 100%, so that the light beam emitted from the frequency tripling crystal 4 contains ultraviolet laser, residual frequency doubled laser and residual base frequency laser by adding the residual base frequency laser.
In one embodiment, the frequency doubling crystal 2 is a class I matched crystal, which may be a nonlinear crystal including LBO, KTP, KT × P. The frequency tripling crystal 4 adopts I I type matching crystal, and the II type matching crystal can adopt nonlinear crystal including LBO, KTP and KTP. In one embodiment, the frequency doubling crystal 2 and the frequency tripling crystal 4 are respectively placed in a temperature control device, and the temperature control device can adopt PID (thermal integration sphere) or TEC (thermoelectric cooler) temperature control.
The ultraviolet generation light path in the embodiment includes a light beam shifter 3, the light beam shifter 3 is arranged between the frequency doubling crystal 2 and the frequency tripling crystal 4, and the position of a light beam focus point on the frequency tripling crystal 4 is adjusted through the light beam shifter 3. The light beam shifter 3 can adopt a medium strip for receiving and can change the position of a light beam, and because ultraviolet laser generated by frequency tripling easily damages the crystal, the focusing position of the light beam needs to be changed after the ultraviolet laser is used for a period of time, so that the frequency tripling crystal 4 is fully utilized. Further, the beam shifter 3 is a beam shifting bar, and the beam shifting bar is adjusted to shift the focus position of the beam entering the frequency tripling crystal 4, that is, the shift amount between the generated beams is changed. Therefore, after the frequency tripling crystal 4 operates for a period of time, the position of the focus point on the frequency tripling crystal 4 needs to be changed by adjusting the light beam shifter 3 so as to ensure long-time operation. Further, the beam shifter 3 is also used to adjust the displacement between the frequency-doubled laser and the remaining fundamental laser.
The beam splitting light path in the embodiment comprises a beam splitting prism component, and the beam splitting prism component and the ultraviolet generating light path form a V-shaped structure; and separating the ultraviolet laser, the fundamental frequency laser and the frequency doubling laser according to different wavelengths through the light splitting prism assembly. In the embodiment, the light splitting prism assembly and the ultraviolet generation light path form a V-shaped structure to avoid reflection of ultraviolet laser. In one embodiment, the beam splitter prism assembly comprises a plurality of beam splitter prisms, and each beam splitter prism is made of CaF with a structural vertex angle of 60 degrees2、F2And N-SF 11. Namely, the beam splitting prism adopts an isosceles prism with an apex angle of about 60 degrees. Preferably, the beam splitting prism assembly includes two beam splitting prisms. In one embodiment, the laser beam exiting frequency tripling crystal 4 enters the beam splitting prism assembly at a minimum deflection angle and brewster.
In the embodiment, the light splitting prism assembly and the ultraviolet generation light path form a V-shaped structure to avoid reflection of ultraviolet laser. Further, the beam splitter prism in the beam splitting optical path adopts a high dispersion beam splitter prism. The triple-frequency laser beam enters the refraction edge of the beam splitting prism assembly at the minimum deviation angle and the Brewster, the incident light and the emergent light are symmetrical through the minimum deviation angle, the aberration is reduced, and better laser spot quality is obtained. Reflection is reduced for laser beams incident at the brewster angle, thereby reducing losses. The prism splitting principle in this embodiment is as shown in fig. 2, and the splitting prism in this embodiment adopts an isosceles triangle, and the structure vertex angle α thereof is set to be about 60 °. Incident angle i1And exit angle i'2Is the deflection angle of the beam splitter prism, then the minimum deflection angle θ is i1+i′2- α. Under the premise of a minimum deviation angle, the angular dispersion ratio of a single beam splitter prism is as follows:
then, the dispersion ratios of the m prisms are:
when the angular dispersion rate needs to be improved, the number of the beam splitter prisms is increased. Furthermore, the minimum prism angle incidence is selected to ensure that the light path is symmetrical and the aberration generated by the prism is minimum. CaF can be adopted as the high dispersion beam-splitting prism assembly in the embodiment2、F2And a beam splitter prism made of a material such as N-SF 11.
In this embodiment, the laser beam output after triple frequency multiplication is incident on the beam splitter at the brewster angleAnd when the laser beam is P polarized light, the reflectivity of the first surface of the beam splitting prism assembly is 0. The calculation formula of the Brewster angle is as follows:
the beam splitting optical path in this embodiment includes a blackbody cavity 8, and the remaining frequency doubled laser separated by the beam splitting prism assembly is collected through the blackbody cavity 8. Further, since the present embodiment is used for emitting the ultraviolet laser, after the ultraviolet laser is removed and emitted, the residual fundamental frequency laser is used for recycling, and the residual frequency doubled laser is treated as the waste light. For example, if the fundamental frequency laser is the fundamental frequency infrared laser, the fundamental frequency infrared laser generates green light after being frequency-doubled, but the final purpose is ultraviolet laser, the green light is further frequency-tripled to generate ultraviolet laser, and due to the limitation of frequency doubling efficiency, the residual fundamental frequency infrared laser and the green light are also present, at this time, the green light processed by the waste light is collected through the blackbody cavity 8, and the fundamental frequency infrared laser is recycled to the fundamental frequency generation optical path to oscillate so as to further enter the ultraviolet generation optical path for frequency doubling again, thereby improving the laser conversion efficiency and reducing the waste light.
The beam splitting optical path in this embodiment includes an ultraviolet reflecting mirror 7, and reflects the ultraviolet laser light split by the beam splitting prism assembly by the ultraviolet reflecting mirror 7. In the embodiment, the ultraviolet laser is effectively separated and led out through the light splitting prism group, so that the fundamental laser continuously oscillates in the resonant cavity, and the frequency doubling laser is regarded as the intra-cavity loss, thereby improving the frequency doubling efficiency and obtaining the ultraviolet laser with higher energy density.
The fundamental frequency generation optical path in the embodiment includes a pumping component, a dichroic mirror 12, a laser crystal 11, a first resonant cavity mirror 1, and a second resonant cavity mirror 9; the pumping assembly is used for generating pumping light; the dichroic mirror 12 is used for transmitting the pump light and reflecting the fundamental laser light emitted by the laser crystal 11; under the excitation of the pump light, the gain medium of the laser crystal 11 undergoes population inversion to generate fundamental laser; the first resonator mirror 1 reflects fundamental laser light and frequency-doubled laser light. Corresponding to the ultraviolet generating light path, the first resonant cavity reflector 1 is used for reflecting the frequency doubling laser and the residual base frequency laser, so that the frequency doubling laser and the residual base frequency laser enter the frequency doubling crystal again for frequency doubling treatment, then enter the frequency doubling crystal 4 for frequency tripling treatment, and then generate ultraviolet laser and emit the ultraviolet laser. The second resonator mirror 9 and the first resonator mirror 1 form a flat cavity, and the second resonator mirror 9 reflects the fundamental laser light so that the fundamental laser light oscillates in the flat cavity. Furthermore, the flat cavity structure is sensitive to the alignment of laser beam transmission, and the adjustment precision requirement is high, so that the flat cavity structure has good directivity. In one embodiment, the laser crystal 11 is placed in a water-cooled heat sink and the temperature is controlled at 24 ± 1 ℃.
The Q-switch 10 in this embodiment is placed between the second resonator mirror 9 and the laser crystal 11, and outputs the fundamental laser light as nanosecond pulse laser light by the generated nanosecond pulse, so that the ultraviolet laser light generated by the triple frequency is output as nanosecond pulse ultraviolet laser light. Further, the Q-switch 10 may be an electro-optical Q-switch or an acousto-optical Q-switch, so that the fundamental laser is output as the nanosecond pulse laser by the regulation of the electro-optical Q-switch or the acousto-optical Q-switch, and the nanosecond pulse ultraviolet laser is finally generated.
In one embodiment, the pumping assembly comprises a collimating focusing lens group 13, a pumping source 14; the pump source 14 is used for generating pump light; the collimating and focusing lens group 13 is used to focus the pump light into the laser crystal 11. The pump source 14 may employ an LD pump source.
For example, the fundamental frequency laser is a fundamental frequency infrared laser, and generates a frequency doubling green light after frequency doubling treatment and generates an ultraviolet laser after frequency tripling treatment. Further, the process of emitting ultraviolet laser light using the present embodiment is as follows: the pumping source 14 is incident into the laser crystal 11 through the collimating and focusing lens group 13 and the dichroic mirror 12, and the gain medium of the laser crystal 11 undergoes population inversion under the excitation of pumping light to generate fundamental frequency infrared laser, and the fundamental frequency infrared laser oscillates in the resonant cavity. The fundamental laser enters the triple frequency crystal 4 and the beam shifter 3 through the beam splitting prism component. When the fundamental frequency infrared laser passes through the triple frequency crystal 4, the fundamental frequency infrared laser directly passes through the double frequency crystal 2 because of the mismatching of angles, and the fundamental frequency infrared laser passes through the double frequency crystal 2 and then generates double frequency laser, namely, double frequency green light through the angle matching, and the double frequency efficiency reaches about 50%. The frequency doubling green light and the base frequency infrared laser are reflected at the second resonant cavity mirror, the base frequency infrared laser and the frequency doubling green light enter the frequency tripling crystal 4 after passing through the frequency doubling crystal 2, ultraviolet laser is generated by frequency tripling and is emitted from the frequency tripling crystal 4, and the emitted laser beam contains the base frequency infrared light, the frequency doubling green light and the required frequency tripling ultraviolet laser. And separating the laser with different wavelengths by a group of high-dispersion light-splitting prism groups, and outputting ultraviolet laser. The frequency doubling green light enters a black body cavity 8 for collecting waste light after separation, fundamental frequency infrared laser enters the surface of a dichroic mirror 12 and returns to a resonant cavity for oscillation, a Q-switch 10 generates pulse laser, nanosecond ultraviolet laser is finally output, and the ultraviolet laser is output through an ultraviolet reflector 7. After the operation is carried out for a period of time, the position of a focusing point on the frequency tripling crystal 4 is changed by adjusting the light beam displacement sheet so as to ensure long-time operation.
While the preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made to the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (9)
1. A compact nanosecond uv laser, comprising: the resonant cavity comprises a fundamental frequency generation light path, an ultraviolet generation light path, a light beam separation light path and a Q-switching switch;
the fundamental frequency generation optical path is used for generating fundamental frequency laser;
the ultraviolet generating light path is used for carrying out frequency doubling on the fundamental frequency laser to generate frequency-doubled laser; performing triple frequency on the frequency-doubled laser to generate ultraviolet laser, and emitting the ultraviolet laser and the residual fundamental frequency laser and frequency-doubled laser;
the beam splitting optical path is used for splitting the ultraviolet laser, the residual fundamental frequency laser and the frequency doubling laser, so that the residual fundamental frequency laser still oscillates in the resonant cavity, the residual frequency doubling laser is collected, and the ultraviolet laser is output;
the Q-switch is used for outputting nanosecond pulses, so that ultraviolet laser is output as nanosecond pulse ultraviolet laser.
2. The compact nanosecond uv laser according to claim 1, wherein the uv generating optical path comprises a frequency tripling crystal, a frequency doubler crystal in that order;
the frequency doubling crystal is used for carrying out frequency doubling on the fundamental frequency laser to generate frequency doubling laser;
the frequency tripling crystal is used for performing frequency tripling on frequency doubled laser and residual fundamental frequency laser to generate ultraviolet laser.
3. The compact nanosecond uv laser according to claim 2, wherein said uv generating path comprises a beam displacer disposed between said frequency doubling crystal and said frequency tripling crystal; and adjusting the position of a light beam focus point on the frequency tripling crystal through the light beam shifter.
4. The compact nanosecond ultraviolet laser as set forth in claim 2, wherein said beam splitting circuit comprises a beam splitting prism assembly, said beam splitting prism assembly and said ultraviolet generating circuit forming a V-configuration; and separating the ultraviolet laser, the fundamental frequency laser and the frequency doubling laser according to different wavelengths through the light splitting prism assembly.
5. The compact nanosecond ultraviolet laser as set forth in claim 4, wherein said fundamental frequency generation optical path comprises a pumping assembly, a dichroic mirror, a laser crystal, a first resonator mirror, a second resonator mirror;
the pumping assembly is used for generating pumping light;
the dichroic mirror is used for transmitting the pump light and reflecting the fundamental laser emitted by the laser crystal;
under the excitation of pump light, the gain medium of the laser crystal generates population inversion to generate fundamental laser;
the first resonant cavity reflector reflects fundamental frequency laser and frequency multiplication laser;
the second resonant cavity reflector and the first resonant cavity reflector form a flat cavity, and the second resonant cavity reflector reflects fundamental laser.
6. The compact nanosecond ultraviolet laser as set forth in claim 5, wherein said Q-switch is disposed between said second resonator mirror and said laser crystal for outputting said fundamental laser light as nanosecond pulsed laser light, so that said triple frequency generated ultraviolet laser light is output as nanosecond pulsed ultraviolet laser light.
7. The compact nanosecond ultraviolet laser as set forth in claim 6, wherein said pump assembly comprises a collimating focusing lens group, a pump source; the pump source is used for generating pump light; the collimation focusing lens group is used for focusing the pump light in the laser crystal.
8. The compact nanosecond ultraviolet laser as set forth in claim 4, wherein said beam splitting optical path comprises a blackbody cavity through which remaining frequency doubled laser light split by said beam splitting prism assembly is collected.
9. The compact nanosecond ultraviolet laser as set forth in claim 4, wherein said beam splitting optical path comprises an ultraviolet mirror through which ultraviolet laser light split by said beam splitting prism assembly is reflected.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116826500A (en) * | 2023-04-24 | 2023-09-29 | 广东光机高科技有限责任公司 | Dual-wavelength output laser for marking aerial cable |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116826500A (en) * | 2023-04-24 | 2023-09-29 | 广东光机高科技有限责任公司 | Dual-wavelength output laser for marking aerial cable |
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