Laser for realizing high-power pumping stable output based on temperature gradient spectrum broadening

Abstract

The invention belongs to the technical field of lasers, and particularly relates to a laser for achieving high-power pumping stable output based on temperature gradient spectrum broadening. Comprising a total reflection mirror, a gain medium, an output mirror, a vapor chamber, a right trapezoid prism heat sink, a bar module, a first temperature probe, a second temperature probe, a first TEC, a second TEC, an environment temperature detector, a wire, an information processing module, a regulation and control module and a driving power supply, wherein the total reflection mirror and the output mirror form an optical resonant cavity. Through the temperature gradient distribution of the right trapezoid prism heat sink, the bar module is induced to generate a thermally induced spectrum broadening effect, and the temperature gradient range of the laser during high-power working is regulated and controlled through the TEC, so that the broad spectrum emission of pump light is realized, a plurality of characteristic absorption peaks can be covered at the same time, and the high-power pumping efficiency of the laser is improved during high-power pumping. And efficient energy conversion and stable laser output are realized.

Description

Technical Field

[0001] The present invention relates to the technical field of lasers, specifically a laser that realizes stable output of high-power pumping based on temperature-gradient spectral broadening. Background Art

[0002] With the rapid development of laser technology, lasers have been widely used in fields such as scientific research, communication, and medical treatment. Especially in the research and development of high-power lasers, the absorption efficiency of laser crystals for pump light directly affects the power, efficiency, and stability of lasers. Traditional single-wavelength pumped lasers have problems such as narrow bandwidth and limited excitation efficiency, making it difficult to meet the high-power requirements of modern laser systems. Broad-spectrum pumping can provide a wider range of energy input, improving the efficiency and stability of lasers. Although there have been studies attempting to expand the pump spectrum by methods such as increasing the gain medium and nonlinear optical effects, these technologies often suffer from problems such as low efficiency, complex systems, and high costs. Therefore, how to achieve high-power pumping through optimizing the system structure and ensure the stability of laser output remains a key technical problem to be solved urgently. Summary of the Invention

[0003] (I) Technical Problems to be Solved

[0004] In view of the deficiencies of the prior art, the present invention provides a laser that realizes stable output of high-power pumping based on temperature-gradient spectral broadening, solving the problems raised in the above background art.

[0005] (II) Technical Solutions

[0006] The present invention specifically adopts the following technical solutions to achieve the above object:

[0007] A laser that realizes stable output of high-power pumping based on temperature-gradient spectral broadening, comprising a total reflector, a gain medium, an output mirror, a heat pipe, a right trapezoidal prism heat sink, a bar module, a first temperature probe, a second temperature probe, a first TEC, a second TEC, an ambient temperature detector, wires, an information processing module, a regulation module, and a driving power supply, wherein the total reflector and the output mirror form an optical resonator;

[0008] A total reflector, a gain medium, and an output mirror are sequentially arranged from left to right along the optical path direction. The heat spreader is placed parallel to the lower side of the gain medium. A plurality of right trapezoidal prism heat sinks are sequentially placed on the heat spreader along the optical path propagation direction. The main rectangular side of the right trapezoidal prism heat sink is placed closely against the first TEC and the second TEC. The first TEC and the second TEC are respectively arranged directly below the first temperature probe and the second temperature probe, and are both closely attached and installed on the upper surface of the heat spreader. The inclined rectangular sides of the right trapezoidal prism heat sink are sequentially placed with bar modules. The drive power supply is arranged on the right trapezoidal prism heat sink. The first temperature probe and the second temperature probe are respectively placed at the end of the right trapezoidal prism heat sink far from the main rectangular side and the end close to the main rectangular side;

[0009] The environmental temperature detector, the first temperature probe, the second temperature probe, the first TEC, the second TEC, the regulation module, and the drive power supply are all connected to the information processing module through wires.

[0010] Further, the first TEC is used to regulate the temperature of the long right-angled side end of the right trapezoidal prism heat sink, and the second TEC is used to regulate the temperature of the short right-angled side end of the right trapezoidal prism heat sink.

[0011] Further, the side of the total reflector close to the gain medium is coated with a total reflection film of the output laser wavelength. Both ends of the gain medium are coated with an antireflection film of the output laser wavelength. The side of the output mirror close to the gain medium is coated with an antireflection film of the output laser wavelength.

[0012] Further, the environmental temperature detector is used to detect the temperature of the environment where the laser is located. The drive power supply is used to provide a stable and controllable current to the bar module, and can send the magnitude of the current currently loaded on the bar module to the information processing module. The information processing module is used to receive the temperature values detected by the environmental temperature detector, the first temperature probe, and the second temperature probe, as well as the current value loaded on the bar module by the drive power supply, and can make a judgment on whether to start the regulation mechanism according to a preset threshold, and send a regulation signal or a non-regulation signal to the regulation module. The regulation module receives the regulation signal or the non-regulation signal sent by the information processing module and regulates the temperature change of the first TEC and the second TEC.

[0013] Further, the heat spreader and the right trapezoidal prism heat sink achieve thermal coupling. Under high-power pumping conditions, a longitudinal temperature gradient distribution is established inside the heat sink through directional heat conduction: a low-temperature region is formed in the region close to the heat spreader, and a high-temperature region is formed in the region far from the heat spreader, so as to form a continuous temperature gradient field on the inclined rectangular side of the right trapezoidal prism heat sink.

[0014] Furthermore, the bar module is placed on the inclined rectangular side of the right trapezoidal prism heat sink. The longitudinal temperature gradient distribution established by the inclined plane of the heat sink induces a thermally induced spectral broadening effect in the bar module, thereby achieving a broad-spectrum emission of the pump light. The absorption spectrum of the gain medium exhibits multiple characteristic absorption peaks. The broad-spectrum emission light generated by the bar module matches the absorption spectrum of the gain medium, can simultaneously cover multiple characteristic absorption peaks, and realizes efficient energy conversion and stable laser output during high-power pumping.

[0015] (III) Beneficial effects

[0016] Compared with the prior art, the present invention provides a laser for achieving stable output of high-power pumping based on temperature-gradient spectral broadening, and has the following beneficial effects:

[0017] Through the temperature gradient distribution of the right trapezoidal prism heat sink, the present invention induces a thermally induced spectral broadening effect in the bar module, and regulates the temperature gradient range of the laser during high-power operation through the TEC, thereby achieving a broad-spectrum emission of the pump light, which can simultaneously cover multiple characteristic absorption peaks, and realizes efficient energy conversion and stable laser output during high-power pumping. It provides strong technical support for research and applications in related fields. Description of the drawings

[0018] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 is a partially enlarged view of the present invention;

[0020] Figure 3 is an absorption spectrum diagram of the Nd:YAG crystal;

[0021] Figure 4 is a temperature gradient distribution diagram of the right trapezoidal prism heat sink;

[0022] Figure 5 is an output wavelength diagram of the bar module at different temperatures;

[0023] Figure 6 is an emission wavelength distribution diagram of all bar modules;

[0024] Figure 7 is a working flow chart of the present invention.

[0025] In the figure: 1, total reflection mirror; 2, gain medium; 3, output mirror; 4, heat spreader; 5, right trapezoidal prism heat sink; 6, bar module; 7, first temperature probe; 8, second temperature probe; 9, first TEC; 10, second TEC; 11, ambient temperature detector; 12, wire; 13, information processing module; 14, regulation module; 15, drive power supply. Detailed implementation manners

[0026] Next, in combination with the accompanying drawings in the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] Embodiment

[0028] As Figure 1-7 shown, a laser for realizing stable output of high-power pumping based on temperature-gradient spectral broadening proposed in an embodiment of the present invention includes a total reflection mirror 1, a gain medium 2, an output mirror 3, a heat pipe 4, a right trapezoidal prism heat sink 5, a bar module 6, a first temperature probe 7, a second temperature probe 8, a first TEC 9, a second TEC 10, an ambient temperature detector 11, a wire 12, an information processing module 13, a regulation module 14, and a driving power supply 15, wherein the total reflection mirror 1 and the output mirror 3 form an optical resonator; it should be noted here that TEC is the abbreviation of Thermoelectric Cooler, and its Chinese meaning is thermoelectric cooler.

[0029] Among them, the total reflection mirror 1, the gain medium 2, and the output mirror 3 are arranged in sequence from left to right along the optical path direction. The heat pipe 4 is placed parallel to the lower side of the gain medium 2. A plurality of right trapezoidal prism heat sinks 5 are placed in sequence along the optical path propagation direction on the heat pipe 4. The main rectangular side surface of the right trapezoidal prism heat sink 5 is placed closely against the first TEC 9 and the second TEC 10. The first TEC 9 and the second TEC 10 are respectively arranged directly below the first temperature probe 7 and the second temperature probe 8, and are both tightly attached to the upper surface of the heat pipe 4. The bar module 6 is placed on the inclined rectangular side surface of the right trapezoidal prism heat sink 5 in sequence. The driving power supply 15 is arranged on the right trapezoidal prism heat sink 5. The first temperature probe 7 and the second temperature probe 8 are respectively placed at the end of the right trapezoidal prism heat sink 5 far from the main rectangular side surface and the end close to the main rectangular side surface;

[0030] The ambient temperature detector 11, the first temperature probe 7, the second temperature probe 8, the first TEC 9, the second TEC 10, the regulation module 14, and the driving power supply 15 are all connected to the information processing module 13 through the wire 12.

[0031] In this embodiment, the first TEC 9 is used to regulate the temperature of the long right-angle side surface end of the right trapezoidal prism heat sink 5, and the second TEC 10 is used to regulate the temperature of the short right-angle side surface end of the right trapezoidal prism heat sink 5.

[0032] In this embodiment, a 1064 nm total reflection film of the output laser wavelength is coated on the side of the total reflection mirror 1 close to the gain medium 2. The gain medium 2 is a Nd:YAG crystal, and 1064 nm antireflection films of the output laser wavelength are coated on both ends of the gain medium 2. A 1064 nm antireflection film with a transmittance of 48% of the output laser wavelength is coated on the side of the output mirror 3 close to the gain medium 2.

[0033] In this embodiment, the ambient temperature detector 11 is used to detect the temperature of the environment where the laser is located. The drive power supply 15 is used to provide a stable and controllable current for the bar module 6, and can send the magnitude of the current currently loaded on the bar module 6 to the information processing module 13. The information processing module 13 is used to receive the temperature values detected by the ambient temperature detector 11, the first temperature probe 7, and the second temperature probe 8, as well as the current value loaded on the bar module 6 by the drive power supply 15, and can make a judgment on whether to start the regulation mechanism according to a preset threshold, and send a regulation signal or a non-regulation signal to the regulation module 14. The regulation module 14 receives the regulation signal or the non-regulation signal sent by the information processing module 13 and regulates the temperature changes of the first TEC 9 and the second TEC 10.

[0034] In this embodiment, the heat pipe 4 is thermally coupled with the right-angled trapezoidal prism heat sink 5. Under high-power pumping conditions, a longitudinal temperature gradient distribution is established inside the heat sink through directional heat conduction: a low-temperature region is formed in the area close to the heat pipe 4, and a high-temperature region is formed in the area far from the heat pipe 4, so as to form a continuous temperature gradient field on the oblique rectangular side surface of the right-angled trapezoidal prism heat sink 5, as Figure 4 shown.

[0035] In this embodiment, the bar module 6 is placed on the oblique rectangular side surface of the right-angled trapezoidal prism heat sink 5. Through the longitudinal temperature gradient distribution established by the heat sink inclined surface, the bar module 6 is induced to generate a thermally induced spectral broadening effect, so as to realize the wide-spectrum emission of the pump light, as Figure 5 、 Figure 6 shown; the absorption spectrum of the gain medium 2 presents multiple characteristic absorption peaks, as Figure 3 shown; the wide-spectrum emission light generated by the bar module 6 matches the absorption spectrum of the gain medium 2, can cover multiple characteristic absorption peaks at the same time, and realizes efficient energy conversion and stable laser output during high-power pumping.

[0036] The process of the laser of the present invention realizing high-power stable output is as follows:

[0037] S1: The laser is turned on.

[0038] S2: The information processing module 13 obtains the temperature values detected by the environmental temperature detector 11, the first temperature probe 7, and the second temperature probe 8, as well as the current value loaded by the drive power supply 15 onto the bar module 6, and transmits the obtained information to the information processing module 13.

[0039] S3: The information processing module 13 determines whether the current environmental temperature exceeds the set threshold, whether the current loaded by the drive power supply 15 exceeds the set threshold, and whether the temperature difference detected by the first temperature probe 7 and the second temperature probe 8 exceeds the preset temperature gradient threshold. If any one of them exceeds the set threshold, the information processing module 13 sends a signal to start the regulation mechanism to the regulation module 13; if all conditions do not exceed the set threshold, the information processing module 13 does not transmit a signal to the regulation module 13.

[0040] S4: The regulation module 13 receives the regulation mechanism signal and transmits the signal to the first TEC 9 and the second TEC 10. The first TEC 7 and the second TEC 8 change the temperature to adjust the temperature gradient of the right trapezoidal prism heat sink 5 to the set range. At the same time, the right trapezoidal prism heat sink 5 real-time feeds back the current temperature gradient range through the first temperature probe 7 and the second temperature probe 8 to ensure that the temperature gradient range of the right trapezoidal prism heat sink 5 is within the set range.

[0041] S5: When the information processing module 13 determines that all conditions do not exceed the threshold, it stops transmitting regulation information, and the bar module 6 emits pump light of different wavelengths, and the laser operates normally at high power.

[0042] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A laser that realizes stable output of high-power pumping based on temperature-gradient spectral broadening, characterized in that: It includes a total reflection mirror (1), a gain medium (2), an output mirror (3), a heat pipe (4), a right trapezoidal prism heat sink (5), a bar module (6), a first temperature probe (7), a second temperature probe (8), a first TEC (9), a second TEC (10), an ambient temperature detector (11), a wire (12), an information processing module (13), a regulation module (14), and a drive power supply (15); Among them, the total reflection mirror (1), the gain medium (2), and the output mirror (3) are arranged in sequence from left to right along the optical path. The heat pipe (4) is placed parallel to the lower side of the gain medium (2). A plurality of right trapezoidal prism heat sinks (5) are placed in sequence along the optical path propagation direction on the heat pipe (4). The main rectangular side of the right trapezoidal prism heat sink (5) is placed close to the first TEC (9) and the second TEC (10). The first TEC (9) and the second TEC (10) are respectively arranged directly below the first temperature probe (7) and the second temperature probe (8), and are both tightly attached to the upper surface of the heat pipe (4) for installation. The inclined rectangular sides of the right trapezoidal prism heat sink (5) are sequentially placed with bar modules (6). The drive power supply (15) is arranged on the right trapezoidal prism heat sink (5). The first temperature probe (7) and the second temperature probe (8) are respectively placed at the end of the right trapezoidal prism heat sink (5) far from the main rectangular side and the end close to the main rectangular side; The ambient temperature detector (11), the first temperature probe (7), the second temperature probe (8), the first TEC (9), the second TEC (10), the regulation module (14), and the drive power supply (15) are all connected to the information processing module (13) through the wire (12).

2. The laser for achieving stable output of high-power pump based on spectral broadening of temperature gradient according to claim 1, wherein: The first TEC (9) is used to regulate the temperature of the long right-angled side end of the right trapezoidal prism heat sink (5), and the second TEC (10) is used to regulate the temperature of the short right-angled side end of the right trapezoidal prism heat sink (5).

3. The laser for achieving stable output of high-power pump based on spectral broadening by temperature gradient as claimed in claim 1, wherein: The side of the total reflection mirror (1) close to the gain medium (2) is coated with a total reflection film of the output laser wavelength. The two ends of the gain medium (2) are coated with an antireflection film of the output laser wavelength. The side of the output mirror (3) close to the gain medium (2) is coated with an antireflection film of the output laser wavelength.

4. The laser for achieving stable output of high-power pump based on spectral broadening by temperature gradient as claimed in claim 1, wherein: The ambient temperature detector (11) is used to detect the temperature of the environment where the laser is located. The drive power supply (15) is used to provide a stable and controllable current for the bar module (6), and can send the magnitude of the current currently loaded on the bar module (6) to the information processing module (13). The information processing module (13) is used to receive the temperature values detected by the ambient temperature detector (11), the first temperature probe (7), and the second temperature probe (8), and the current value loaded on the bar module (6) by the drive power supply (15), and can make a judgment on whether to start the regulation mechanism according to a preset threshold, and send a regulation signal or a non-regulation signal to the regulation module (14). The regulation module (14) receives the regulation signal or the non-regulation signal sent by the information processing module (13) and regulates the temperature change of the first TEC (9) and the second TEC (10).

5. The laser for achieving stable output of high-power pump based on spectral broadening of temperature gradient according to claim 1, characterized in that: The heat pipe (4) is thermally coupled with the right-angled trapezoidal prism heat sink (5). Under high-power pumping conditions, a longitudinal temperature gradient distribution is established inside the heat sink through directional heat conduction: a low-temperature region is formed in the area close to the heat pipe (4), and a high-temperature region is formed in the area far from the heat pipe (4), so as to form a continuous temperature gradient field on the inclined rectangular side surface of the right-angled trapezoidal prism heat sink (5).

6. The laser for achieving stable output of high-power pump based on spectral broadening by temperature gradient as claimed in claim 1, wherein: The bar module (6) is placed on the inclined rectangular side surface of the right-angled trapezoidal prism heat sink (5). Through the longitudinal temperature gradient distribution established by the inclined surface of the heat sink, the bar module (6) is induced to generate a thermally induced spectral broadening effect, so as to realize the wide-spectrum emission of the pump light; the absorption spectrum of the gain medium (2) presents multiple characteristic absorption peaks; the wide-spectrum emission light generated by the bar module (6) matches the absorption spectrum of the gain medium (2), and can cover multiple characteristic absorption peaks at the same time, realizing efficient energy conversion and stable laser output during high-power pumping.

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