A dual-wavelength high-power narrow pulse width laser suitable for water and land detection

Abstract

The utility model relates to the technical field of laser, disclose a kind of dual-wavelength high-power narrow pulse width laser suitable for water and land detection, including cabinet, the light path cavity is arranged in the cabinet, heat source installation cavity and the heat dissipation air duct layer being arranged between the light path cavity and the heat source installation cavity;Optical path module, including the seed source module, amplifier module, frequency doubling module and beam expanding module sequentially arranged along optical path, the optical path module is arranged in the light path cavity;Heat source module, including the amplifier pump source and seed pump source being arranged in the heat source installation cavity, the seed pump source is electrically connected with the seed source module, amplifier pump source is electrically connected with the amplifier module, heat dissipation module, including heat dissipation air duct tooth block and temperature control unit, the heat dissipation air duct tooth block is arranged in the heat dissipation air duct layer, and the temperature control unit includes two groups of refrigerator respectively connected with the amplifier pump source and with the seed pump source.

Description

Technical Field

[0001] This utility model relates to the field of laser technology, and in particular to a dual-wavelength high-power narrow pulse width laser suitable for land and water exploration. Background Technology

[0002] With the development of integrated land-sea lidar technology, the system needs to simultaneously emit dual-band lasers: blue-green light (to penetrate water) and near-infrared light (to detect land / water surfaces). To meet the needs of deep-sea exploration, the blue-green band requires high pulse energy (usually generated by frequency doubling of near-infrared lasers); while the near-infrared band needs to maintain high power to support high-resolution three-dimensional imaging of the water surface or underwater.

[0003] The shortcomings of existing laser modules are as follows: 1. Heat dissipation bottleneck: High-power lasers generate concentrated heat during operation, and traditional heat dissipation structures struggle to achieve temperature balance within a small volume. Furthermore, most laser sources with high heat sources share a cavity with the optical path system. Due to temperature rise, laser energy output is limited (especially significantly affecting the efficiency of frequency-doubled green light). The module undergoes thermal deformation, causing optical path misalignment, leading to decreased module accuracy or even failure. 2. Difficult debugging: Precise adjustment is required for optical path collimation and beam combining, but modular packaging lacks internal adjustment space, resulting in low assembly tolerance and reduced yield. 3. Poor environmental adaptability: Airborne or shipborne environments are subject to vibration, temperature changes, electromagnetic interference, and moisture and dust corrosion. Conventional modules lack sufficient sealing and shielding, leading to signal drift or device failure. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a dual-wavelength high-power narrow pulse width laser suitable for land and water detection. It has the advantages of efficient heat dissipation, good optical path tunability and high protection level, and is suitable for aviation, surface and underwater photoelectric detection platforms.

[0005] The technical solution of this utility model is: a dual-wavelength high-power narrow pulse width laser suitable for land and water exploration, including a chassis, wherein an optical path cavity, a heat source mounting cavity and a heat dissipation air duct layer are provided inside the chassis; The optical path module includes a seed source module, an amplifier module, a frequency doubling module, and a beam expander module arranged sequentially along the optical path. The optical path module is disposed in the optical path cavity and is used to synchronously output dual-band laser. The heat source module includes an amplification pump source and a seed pump source disposed in the heat source mounting cavity. The seed pump source is electrically connected to the seed source module, and the amplification pump source is electrically connected to the amplifier module, for providing a dual-wavelength laser heat source. The heat dissipation module includes a heat dissipation air duct tooth block and a temperature control unit. The heat dissipation air duct tooth block is disposed in the heat dissipation air duct layer, and the temperature control unit includes two sets of coolers respectively connected to the amplification pump source and the seed pump source.

[0006] As can be seen from the above scheme, the optical path cavity and the heat source mounting cavity are located in two separate cavities, thereby preventing the various modules in the optical path module from undergoing thermal deformation due to heat, which would cause the optical path to shift and ensure the output accuracy of the optical path module.

[0007] The optical path module further includes an optical path adjustment structure, which includes a three-axis adjustment module and an adjustment mounting block disposed on the three-axis adjustment module. The three-axis adjustment module includes an adjustment base, a limiting seat disposed on the adjustment base, and a lifting adjustment block. One side of the adjustment base is connected to the limiting seat through a first elastic element, and the other side is provided with a pressure block on the outside of the limiting seat. The pressure block has a first inclined surface on its inner side, and the limiting seat has a second inclined surface adapted to the first inclined surface. The pressure block has a first mounting hole passing through the first inclined surface, and a fastener that abuts against the second inclined surface is inserted into the first mounting hole. The adjustment base has first adjustment waist-shaped holes on the front and rear sides of the limiting seat. An adjustment assembly is disposed between the limiting seat and the lifting adjustment block. The adjustment assembly includes a second elastic element and a clamping screw. One end of the second elastic element is connected to the upper surface of the limiting seat, and the other end is connected to the bottom of the lifting adjustment block. The clamping screw abuts against the top of the lifting adjustment block through the second mounting hole on the limiting seat. Therefore, the three-axis adjustment module is used to adjust the X-axis, Y-axis and Z-axis. The first pressure block drives the limiting block to squeeze the first elastic element in the horizontal direction, thereby adjusting the mounting block in the horizontal direction. The lifting adjustment block is used to adjust the mounting block in the vertical direction by adjusting the limiting seat. The adjusting base adjusts the limiting seat back and forth through the first adjusting waist-shaped hole.

[0008] The adjusting mounting block has a rotating shaft hole at the center of the connecting frame block. The adjusting mounting block is mounted on the lifting adjusting block. The adjusting base has an opening adapted to the adjusting mounting block. The lifting adjusting block has a mounting shaft hole coaxial with the rotating shaft hole. The upper surface of the adjusting mounting block has a first adjusting member, a first offset locking member, a second adjusting member, and a second offset locking member. The first adjusting member and the first offset locking member are connected to the upper surface of the adjusting mounting block via a first connecting block. The second adjusting member and the second offset locking member are connected to the upper surface of the adjusting mounting block via a second connecting block. Therefore, the rotating shaft hole and the mounting shaft hole are coaxially arranged for mounting optical elements on the connecting frame block. The first and second adjusting members are used to adjust the pitch and yaw angles of the connecting frame block. The first and second offset locking members are used to lock the first and second adjusting members after angle adjustment.

[0009] The chassis is equipped with a top cover at the opening of the optical path cavity and a bottom cover at the opening of the heat source mounting cavity. Conductive sealing rings are embedded on both ends of the chassis. Therefore, the conductive sealing rings are used to ensure the electromagnetic shielding performance of the chassis.

[0010] A window is provided on the outer surface of the chassis corresponding to the beam expander module. Therefore, the window is used for the laser beam to be output after passing through the beam expander module.

[0011] The heat dissipation module also includes a heat dissipation fan and a heat dissipation cover plate. The heat dissipation fan is disposed in the heat dissipation duct layer, and the heat dissipation cover plate is fastened to the outer wall of the heat dissipation duct layer. The heat dissipation cover plate is provided with heat dissipation channels corresponding to the heat dissipation fan.

[0012] The outer surface of the chassis is also provided with a fan power supply interface, a control interface and a power supply interface, and the fan power supply interface is electrically connected to the cooling fan. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of this utility model; Figure 3 This is another internal structural schematic diagram of the present invention; Figure 4 This is a schematic diagram of the optical path adjustment structure; Figure 5 This is a schematic diagram of the adjustment mounting block; Figure 6 This is a schematic diagram of the three-axis adjustment module. Detailed Implementation

[0014] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0015] like Figures 1 to 6 As shown, this utility model is a dual-wavelength high-power narrow pulse width laser suitable for land and water exploration, including a chassis 1, wherein an optical path cavity 11, a heat source mounting cavity 12 and a heat dissipation air duct layer 13 are disposed between the optical path cavity 11 and the heat source mounting cavity 12. The optical path module 2 includes a seed source module 21, an amplifier module 22, a frequency doubling module 23, and a beam expander module 24 arranged sequentially along the optical path. The optical path module 2 is disposed in the optical path cavity 11 and is used to synchronously output dual-band laser. The heat source module includes an amplifying pump source 31 and a seed pump source 32 disposed in the heat source mounting cavity 12. The seed pump source 32 is electrically connected to the seed source module 21, and the amplifying pump source 31 is electrically connected to the amplifier module 22, for providing a dual-wavelength laser heat source. The heat dissipation module includes a heat dissipation duct tooth block 41 and a temperature control unit. The heat dissipation duct tooth block 41 is disposed within the heat dissipation duct layer 13. The temperature control unit includes two sets of coolers 42 connected to the amplification pump source 31 and the seed pump source 32, respectively. The coolers 42 are disposed between the heat source module and the heat dissipation duct layer 13. In this embodiment, the chassis 1 adopts a fully sealed aluminum alloy shell, and the interface adopts metallized ceramic feedthrough terminals to achieve IP67 protection (dustproof and waterproof); the inner electromagnetic shielding liner (conductive silicone + metal mesh) has a shielding effectiveness ≥60dB, blocking internal and external electromagnetic interference. The beam expansion module 24 is a beam expander. The cold surface of the cooler 42 contacts the heat source module, and the hot surface contacts the heat dissipation duct tooth block for heat dissipation. It integrates thermoelectric cooler (TEC) closed-loop temperature control with a temperature control accuracy of ±0.5℃ to ensure wavelength stability under high power.

[0016] The optical path module further includes an optical path adjustment structure, which includes a three-axis adjustment module 5 and an adjustment mounting block 6 disposed on the three-axis adjustment module 5. The three-axis adjustment module 5 includes an adjustment base 51, a limiting seat 52 disposed on the adjustment base 51, and a lifting adjustment block 53. One side of the adjustment base 51 is connected to the limiting seat 52 via a first elastic element 54, and the other side is provided with a pressure block 55 on the outer side of the limiting seat 52. A first inclined surface is provided on the inner side of the pressure block 55, and a second inclined surface 521 adapted to the first inclined surface is provided on the limiting seat 52. The pressure block 55 is provided with a through-hole for the first inclined surface 521. A first mounting hole with an inclined surface is provided, and a fastener 56 is inserted into the first mounting hole to press against the second inclined surface 521. The adjusting base 51 is provided with a first adjusting waist-shaped hole 511 on the front and rear sides of the limiting seat 52. An adjusting assembly is provided between the limiting seat 52 and the lifting adjusting block 53. The adjusting assembly includes a second elastic element 57 and a clamping screw 58. One end of the second elastic element 57 is connected to the upper surface of the limiting seat 52, and the other end is connected to the bottom of the lifting adjusting block 53. The clamping screw 58 abuts against the top of the lifting adjusting block 53 through the second mounting hole 522 on the limiting seat 52. In this embodiment, the adjustment base 51 is fixed to the mounting holes on the bottom plate of the optical path cavity 11 of the chassis 1 at different positions of the first adjustment waist-shaped hole 511, thereby realizing the front and rear adjustment of the adjustment base 51. A reflector module is provided between the frequency doubling module 23 and the beam expanding module 24. The reflector module includes three sets of reflectors for extending the optical path. The reflector module is set on the optical path adjustment structure. The optical path adjustment structure is used to adjust the installation angle to adjust the light path, thereby performing online calibration of the optical path.

[0017] The adjusting mounting block 6 has a rotating shaft hole 60 at the center of the connecting frame block 7. The adjusting mounting block 6 is mounted on the lifting adjusting block 53. The adjusting base has an opening 50 adapted to the adjusting mounting block 6. The lifting adjusting block 53 has a mounting shaft hole 531 coaxial with the rotating shaft hole 60. The upper end face of the adjusting mounting block 6 is provided with a first adjusting member 61, a first offset locking member 62, a second adjusting member 63, and a second offset locking member 64. The first adjusting member 61 and the first offset locking member 62 are connected to the upper end face of the adjusting mounting block 6 via a first connecting block. The second adjusting member 63 and the second offset locking member 64 are connected to the upper end face of the adjusting mounting block 6 via a second connecting block. In this embodiment, the connecting frame block 7 limits the reflective lens or optical component through the rotating shaft hole 60, and the first adjusting member 61 and the second adjusting member 63 are used for pitch and yaw angle adjustment.

[0018] The chassis 1 is equipped with a top cover 111 at the opening of the optical path cavity 11, and a bottom cover 121 at the opening of the heat source mounting cavity 12. Conductive sealing rings 10 are embedded in both ends of the chassis 1. In this embodiment, the conductor sealing ring 10 is a nickel-carbon conductive sealing ring.

[0019] A window 15 is provided on the outer surface of the chassis 1 corresponding to the beam expander module 24.

[0020] The heat dissipation module also includes a cooling fan 43 and a heat dissipation cover 44. The cooling fan 43 is correspondingly disposed within the heat dissipation duct layer 13, and the heat dissipation cover 44 is fastened to the outer wall of the heat dissipation duct layer 13. The heat dissipation cover 44 is provided with heat dissipation channels 441 corresponding to the cooling fan 43. In this embodiment, the heat dissipation cover 44 is fastened to the chassis 1 and fixedly connected by screws. The heat dissipation cover 44 can be replaced with a fully enclosed cover for convenient operation in various scenarios.

[0021] The outer surface of the chassis 1 is also provided with a fan power supply interface 16, a control interface 17 and a power supply interface 18, and the fan power supply interface 16 is electrically connected to the cooling fan 43.

[0022] Finally, it should be emphasized that the above description is not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A dual-wavelength high-power narrow-pulse laser suitable for land and water exploration, characterized in that: Includes a chassis (1), wherein an optical path cavity (11), a heat source mounting cavity (12), and a heat dissipation air duct layer (13) are provided inside the chassis (1). The optical path module (2) includes a seed source module (21), an amplifier module (22), a frequency doubling module (23), and a beam expander module (24) arranged sequentially along the optical path. The optical path module (2) is disposed in the optical path cavity (11) and is used to synchronously output dual-band laser. The heat source module includes an amplification pump source (31) and a seed pump source (32) disposed in the heat source mounting cavity (12). The seed pump source (32) is electrically connected to the seed source module (21), and the amplification pump source (31) is electrically connected to the amplifier module (22) to provide a dual-wavelength laser heat source. The heat dissipation module includes a heat dissipation air duct tooth block (41) and a temperature control unit. The heat dissipation air duct tooth block (41) is disposed in the heat dissipation air duct layer (13). The temperature control unit includes two sets of coolers (42) respectively connected to the amplification pump source (31) and the seed pump source (32).

2. A dual-wavelength high-power narrow-pulse laser suitable for land and water exploration according to claim 1, characterized in that: The optical path module further includes an optical path adjustment structure, which includes a three-axis adjustment module (5) and an adjustment mounting block (6) disposed on the three-axis adjustment module (5). The three-axis adjustment module (5) includes an adjustment base (51), a limiting seat (52) disposed on the adjustment base (51), and a lifting adjustment block (53). One side of the adjustment base (51) is connected to the limiting seat (52) through a first elastic element (54), and the other side is provided with a pressure block (55) on the outside of the limiting seat (52). The pressure block (55) is provided with a first inclined surface on its inner side, and the limiting seat (52) is provided with a second inclined surface (521) adapted to the first inclined surface. The pressure block (55) is provided with a through-hole for the optical path adjustment block (53). The first mounting hole on the first inclined surface is provided with a fastener (56) that abuts against the second inclined surface (521). The adjusting base (51) is provided with a first adjusting waist-shaped hole (511) on the front and rear sides of the limiting seat (52). An adjusting component is provided between the limiting seat (52) and the lifting adjusting block (53). The adjusting component includes a second elastic element (57) and a clamping screw (58). One end of the second elastic element (57) is connected to the upper surface of the limiting seat (52), and the other end is connected to the bottom of the lifting adjusting block (53). The clamping screw (58) abuts against the top of the lifting adjusting block (53) through the second mounting hole (522) on the limiting seat (52).

3. A dual-wavelength high-power narrow-pulse laser suitable for land and water exploration according to claim 2, characterized in that: The adjusting mounting block (6) has a rotating shaft hole (60) at the center of the connecting frame block (7). The adjusting mounting block (6) is mounted on the lifting adjusting block (53). The limiting seat (52) has an opening (50) adapted to the adjusting mounting block (6). The lifting adjusting block (53) has a mounting shaft hole (531) coaxial with the rotating shaft hole (60). The upper end face of the adjusting mounting block (6) is provided with a first adjusting member (61), a first offset locking member (62), a second adjusting member (63), and a second offset locking member (64). The first adjusting member (61) and the first offset locking member (62) are provided on the upper end face of the adjusting mounting block (6) through a first connecting block. The second adjusting member (63) and the second offset locking member (64) are provided on the upper end face of the adjusting mounting block (6) through a second connecting block.

4. A dual-wavelength high-power narrow-pulse laser suitable for land and water exploration according to claim 1, characterized in that: The chassis (1) is equipped with a top cover (111) at the opening of the optical path cavity (11), and the chassis (1) is equipped with a bottom cover (121) at the opening of the heat source mounting cavity (12). Conductive sealing rings (10) are embedded on both ends of the chassis (1).

5. A dual-wavelength high-power narrow-pulse laser suitable for land and water exploration according to claim 4, characterized in that: The outer surface of the chassis (1) is provided with a window (15) corresponding to the beam expansion module (24).

6. A dual-wavelength high-power narrow-pulse laser suitable for land and water exploration according to claim 1, characterized in that: The heat dissipation module also includes a heat dissipation fan (43) and a heat dissipation cover plate (44). The heat dissipation fan (43) is disposed in the heat dissipation duct layer (13), and the heat dissipation cover plate (44) is fastened to the outer wall of the heat dissipation duct layer (13). The heat dissipation cover plate (44) is provided with heat dissipation channels (441) corresponding to the heat dissipation fan (43).

7. A dual-wavelength high-power narrow-pulse laser suitable for land and water exploration according to claim 6, characterized in that: The outer surface of the chassis (1) is also provided with a fan power supply interface (16), a control interface (17) and a power supply interface (18), and the fan power supply interface (16) is electrically connected to the cooling fan (43).

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