All-solid-state timestamp marking device

Abstract

This invention discloses an all-solid-state timestamp marking device, comprising a pulsed laser generation module, a multi-stage coupling delay module, and an output shaping module. This device transmits pulsed laser signals through an all-solid-state medium, utilizing a gradient splitting ratio design and a solid-state waveguide coupling structure to achieve high-precision timing delay output while reducing transmission loss. An end-face microlens group focuses and shapes the output signal, effectively suppressing glare interference and controlling the spot size. This invention features high safety, strong environmental adaptability, high consumable utilization, and excellent signal output quality, solving the problems of laser transmission safety, system stability, and manufacturing cost in existing technologies.

Description

Technical Field

[0001] This invention belongs to the field of timestamp marking technology, and in particular to an all-solid-state timestamp marking device. Background Technology

[0002] In the field of scientific research, the observation and analysis of the motion state and rapid changes of high-speed objects are of great significance. Due to the persistence of vision in the human eye, direct observation of these high-speed phenomena has inherent limitations; therefore, high-speed photography equipment has emerged. High-speed photography equipment possesses high temporal resolution, enabling real-time tracking and recording of the occurrence and development of high-speed changes, providing an effective technical means for the study of high-speed motion processes. Among these, the high-speed camera is the core equipment supporting high-speed photography technology.

[0003] Existing high-speed cameras, limited by the inherent charge migration rate, struggle to record sub-microsecond physical phenomena and processes, and cannot meet the ultra-high precision time resolution requirements of high-speed motion trajectory experiments. Furthermore, they struggle to balance the coupling relationship between temporal and spatial resolution. With technological advancements, high-speed framing cameras have emerged, effectively overcoming the aforementioned shortcomings of ordinary high-speed cameras by collaboratively controlling the exposure sequence of different image planes through optical framing structures and electronic control modules. Specifically, high-speed framing cameras can shorten the continuous exposure time interval caused by the inherent limitations of charge-coupled devices (CCDs), achieving a time magnification effect and thus improving the camera's temporal resolution. This allows them to record transient physical processes that are not directly perceptible to the human eye.

[0004] The core working principle of a high-speed frame-splitting camera is to achieve high-speed frame-splitting shooting by controlling the exposure sequence of different image planes, thus creating a fixed time interval between each image. However, due to factors such as the camera's assembly precision and mechanical tolerances, when externally triggered image acquisition is performed on the frame-splitting camera, the delay time between receiving the external trigger signal and starting the exposure of the frame is uncertain. This makes it impossible to accurately determine the exposure sequence interval of the frame-splitting images, severely affecting the camera's temporal resolution and the effectiveness and reliability of the acquired images, thereby limiting the accuracy of high-speed process analysis based on frame-splitting images. Against this backdrop, a timestamp device has emerged. Its core function is to quantitatively analyze the external trigger delay characteristics of high-speed frame-splitting cameras, providing data support for correcting exposure sequence deviations.

[0005] Currently, existing time characteristic measurement devices and systems still have many technical shortcomings, as follows:

[0006] (1) Defects in laser signal transmission method: The laser signal output by the laser is expanded by a beam expander and then transmitted to the input end face of the fiber array through the air medium. This transmission method has two core problems: First, the required laser power is relatively large, and there are significant safety hazards when the laser signal propagates in the air medium; second, the laser signal suffers severe energy loss after beam expansion and transmission through the air medium. In order to ensure that the laser signal with sufficient energy enters the input end of the fiber array, a laser with higher power needs to be selected, forming a vicious cycle of "power demand - energy loss".

[0007] (2) Poor system environmental adaptability: Since the laser signal is transmitted by using a beam expander in conjunction with an air medium, the system has extremely stringent requirements for the working environment. Even slight disturbances in the environment can cause significant energy loss in the laser signal, and the system's adaptability is severely limited when the working environment is changed, making it difficult to meet the needs of multiple application scenarios.

[0008] (3) The delay structure is not designed properly: the delay part adopts an optical fiber array structure, which has obvious defects: each laser signal output with different delay parameters requires a separate optical fiber to be made, resulting in extremely low material utilization efficiency; when n delayed laser signals are needed, n optical fibers need to be made accordingly, which not only makes the device bulky, but also greatly increases the manufacturing and maintenance costs.

[0009] (4) Poor laser signal output quality: During the transmission of laser signal inside the optical fiber, repeated reflection and refraction can easily lead to distortion of the output spot shape; at the same time, the output of the optical fiber array directly outputs the laser signal, which has obvious glare interference. All of the above problems will affect the image acquisition effect and result in insufficient accuracy of the time characteristic measurement results. Summary of the Invention

[0010] The purpose of this invention is to address the four major shortcomings of the prior art by proposing an all-solid-state timestamp marking device, which aims to simultaneously solve technical problems such as security risks in laser signal transmission, poor system environmental adaptability, low efficiency of consumable utilization, and poor laser signal output quality.

[0011] The technical solution to achieve the purpose of this invention is: an all-solid-state timestamp marking device, the device comprising a pulsed laser generation module, a multi-level coupling delay module, and an output shaping module;

[0012] The pulsed laser generating module is used to output pulsed laser signals;

[0013] The multi-level coupling delay module is connected to the pulsed laser generation module and is used to receive the pulsed laser signal and perform beam splitting and delay processing to form a multi-channel pulsed laser signal with a preset timing difference.

[0014] The output shaping module is arranged on the output end face of the multi-stage coupling delay module and is used to focus and shape the multiple pulsed laser signals before outputting them.

[0015] The transmission path of the pulsed laser signal is entirely located within a solid medium.

[0016] Furthermore, the pulsed laser generating module is connected to the multi-stage coupling delay module via a sealed connection assembly to achieve a detachable and sealed transmission connection, forming a sealed laser transmission channel.

[0017] Furthermore, the pulsed laser generation module employs a pulsed laser with a pigtail output.

[0018] Furthermore, the sealing connection assembly includes a connecting flange, one end of which is detachably connected to the fiber optic output end of the pulsed laser, and the other end is fixedly connected to the input end of the multi-stage coupling delay module; the sealing connection assembly also includes sealing gaskets disposed at the connection points of the connecting flange with the pulsed laser generation module and the multi-stage coupling delay module respectively, and the connection method adopts a sealing structure combining snap-fit ​​positioning and threaded locking.

[0019] Furthermore, the multi-stage coupling delay module internally includes multi-stage beam-splitting delay units distributed along the signal transmission path. Each beam-splitting delay unit is coupled to the others via a solid-state waveguide structure. This allows for beam splitting of the input pulsed laser signal and the introduction of a preset timing delay, thereby forming multiple pulsed laser signals with timing gradients at the output end. The number of stages, n, of the beam-splitting delay units is:

[0020] .

[0021] Furthermore, each of the optical splitting delay units adopts a gradient splitting ratio design, and as the number of signal transmission stages increases, the energy extraction ratio of the optical splitting delay unit is gradually increased so that the intensity of the output signal at each stage is kept within a preset balance range, thereby achieving energy balance of the output signal at each stage.

[0022] Furthermore, the multi-stage coupling delay module achieves timing delay by controlling the physical length difference of the solid-state transmission medium between different stages of optical splitting delay units; wherein, the delay time difference between adjacent output signals is a preset fixed value.

[0023] Furthermore, the output shaping module includes multiple shaping elements that correspond one-to-one with the output ports of the multi-stage beam splitting delay unit, used to focus and shape each timing pulse laser signal before outputting it.

[0024] Furthermore, the multiple shaping elements employ multiple independent microlenses; the numerical aperture of the microlenses matches the numerical aperture of the solid-state transmission medium in the multi-stage coupling delay module, and the microlenses are fixed to the output end face of each stage of the beam splitting delay unit.

[0025] Furthermore, the device also includes an insulating housing, in which the pulsed laser generating module and the multi-stage coupling delay module are independently encapsulated within their respective insulating housings, and a light-transmitting window is provided on the insulating housing containing the multi-stage coupling delay module at the position corresponding to the output shaping module.

[0026] Compared with the prior art, the significant advantages of this invention are:

[0027] (1) The transmission mode takes into account both safety and low loss: The present invention innovatively adopts a full solid-state transmission design, which restricts the pulsed laser signal to be transmitted in a solid medium throughout the entire process. On the one hand, it eliminates the radiation safety hazards caused by the propagation of high-power lasers in the air; on the other hand, it avoids signal scattering loss caused by dust, airflow and other factors in the air medium. It can ensure effective signal strength without the need to select a high-power laser, breaking the vicious cycle of "power demand-energy loss" in the existing technology.

[0028] (2) Strong environmental adaptability of the device: Through the sealed connection design of the connecting flange, the modular encapsulation protection of the outer shell and the all-solid transmission path, the device of the present invention can effectively isolate external environmental interference and greatly reduce the sensitivity to external environmental disturbances; at the same time, the components of the device are firmly connected and highly adaptable. When changing the working scene, it can be quickly adapted without complicated re-adjustment, meeting the measurement needs in multiple scenarios and solving the core defect of poor environmental adaptability of the existing technology.

[0029] (3) Integrated design: The present invention adopts a multi-level coupled delay integrated structure. Through the collaborative design of gradient beam splitting delay unit and fused tapered coupling structure, only one integrated structure is needed to realize the output of laser signals with different timing delays at multiple levels. There is no need to separately manufacture multiple optical fibers, which greatly improves the efficiency of consumable utilization. At the same time, the overall size of the device is reduced, and the processing and manufacturing cost of core components is reduced.

[0030] (4) Excellent signal output quality: In view of the problems of laser signal output spot distortion and severe glare interference in the existing technology, the present invention adds end face microlens group and adopts precise matching design. Through the focusing and shaping effect of microlens, not only is glare interference effectively suppressed, but also the size of the convergence point spot is controlled, avoiding various problems caused by the spot being too large or too small, ensuring that the output signal energy is concentrated and the signal-to-noise ratio is stable, and providing high-quality timestamp signals, thereby improving the accuracy and reliability of measurement results.

[0031] The present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of an all-solid-state timestamp marking device in one embodiment.

[0033] Figure 2 This is a design diagram of a multi-level coupling delay module in one embodiment.

[0034] Figure 3 This is a gradient-based splitting ratio parameter diagram of the splitting delay unit in one embodiment.

[0035] Figure 4 This is a mechanical structure diagram of a multi-stage coupling delay module in one embodiment.

[0036] Figure 5 This is an optical design diagram of the end-face microlens in one embodiment.

[0037] Figure 6 This is a geometric image analysis diagram of the end-face microlens in one embodiment. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0039] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0040] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0041] In one embodiment, combined Figure 1 A fully solid-state timestamp marking device is provided, the device comprising a pulsed laser generation module, a multi-stage coupling delay module, and an output shaping module;

[0042] The pulsed laser generating module 1 is used to output pulsed laser signals;

[0043] The multi-level coupling delay module 3 is connected to the pulsed laser generation module and is used to receive the pulsed laser signal and perform beam splitting and delay processing to form a multi-channel pulsed laser signal with a preset timing difference.

[0044] The output shaping module 4 is arranged on the output end face of the multi-stage coupling delay module and is used to focus and shape the multiple pulsed laser signals before outputting them.

[0045] The transmission path of the pulsed laser signal is entirely located within a solid medium.

[0046] Furthermore, in one embodiment, the pulsed laser generating module is connected to the multi-stage coupling delay module via a sealed connection assembly to achieve a detachable, sealed transmission connection, forming a sealed laser transmission channel.

[0047] Preferably, in some embodiments, the pulsed laser generation module employs a pulsed laser with a pigtail output. The wavelength range of the laser signal output by the pulsed laser source is 895nm-915nm, the pulse width is 100ns, the trigger delay is precisely controlled at 1ns, and the output power is 25mW, which can fully meet the core requirements of low-loss transmission and timing marking. More preferably, the pigtail of the pulsed laser with pigtail output is a multimode fiber with a core diameter of 100μm. Here, the pulsed laser signal is directly output through the multimode pigtail, eliminating the need for transmission through air, thus fundamentally avoiding the energy loss and safety hazards associated with air transmission.

[0048] Preferably, in some embodiments, the sealing connection assembly includes a connecting flange 2, one end of which is detachably connected to the output end of the pulsed laser pigtail, and the other end is fixedly connected to the input end of the multi-stage coupling delay module. The sealing connection assembly also includes (nitrile rubber) sealing gaskets disposed at the connections between the connecting flange and the pulsed laser generation module and the multi-stage coupling delay module, respectively. The connection method employs a sealing structure combining snap-fit ​​positioning and threaded locking to achieve dustproof and waterproof functions. During assembly, the multimode pigtail output end of the pulsed laser is inserted into one end of the connecting flange. After snap-fit ​​positioning, the connecting flange locking nut is rotated to achieve threaded locking, ensuring the coaxiality of the pigtail and the connecting flange. Then, the other end of the connecting flange is connected to the input end of the multi-stage coupling delay module, also using a dual fixing method of "snap-fit ​​positioning + threaded locking" to press the sealing gasket tightly against the surface, ultimately completing the construction of the sealed transmission channel.

[0049] Preferably, the connecting flange is, but not limited to, an FC / PC type flange, which has an insertion loss ≤0.2dB and a return loss ≥60dB, and has low transmission loss and high reflection suppression characteristics.

[0050] Furthermore, in one embodiment, the multi-level coupling delay module is provided with multi-level beam splitting delay units distributed along the signal transmission path. Each level of beam splitting delay unit is coupled to each other through a solid waveguide structure to perform beam splitting processing on the input pulsed laser signal and introduce a preset timing delay, thereby forming multiple pulsed laser signals with timing gradients at the output end face.

[0051] Preferably, in some embodiments, the number of stages n of the spectral delay unit is:

[0052] .

[0053] Preferably, in some embodiments, the solid-state waveguide structure is a fused biconical solid-state waveguide structure.

[0054] Preferably, in some embodiments, the signal of the multi-stage coupling delay module is transmitted through an optical fiber, and the optical splitting delay unit is coupled to the transmission optical fiber through a fused biconical taper solid waveguide structure.

[0055] Preferably, in some embodiments, the beam splitting delay units at each stage employ a gradient splitting ratio design, and as the signal transmission stage increases, the energy extraction ratio of the beam splitting delay units is gradually increased to keep the intensity of the output signal at each stage within a preset balance range, thereby achieving energy balance of the output signal at each stage. Here, the splitting ratio of each beam splitting delay unit is determined based on the coupling loss calculation of the fused conical solid waveguide structure.

[0056] Preferably, in some embodiments, the multi-stage coupling delay module achieves timing delay by controlling the difference in physical length of the solid-state transmission medium between different stages of optical splitting delay units; wherein, the delay time difference between adjacent output signals is a preset fixed value (preferably, a preset minimum delay accuracy). Preferably, the solid-state transmission medium is multimode optical fiber with a core diameter of 100 μm, a core refractive index of 1.45, a numerical aperture of 0.12, and a transmission loss of 0.03 dB / km; the coupling loss of the fused biconical taper solid waveguide structure is 0.3 dB.

[0057] For example, the multi-level coupling delay module has 1 to 10 levels, and the delay time difference between two adjacent levels is fixed at 100 ns.

[0058] The laser signal is first incident on the first-stage beam splitting delay unit, which splits a portion of the signal by 10% of the beam split. The remaining 90% of the signal is transmitted to the second-stage beam splitting delay unit through a fused biconical coupling structure, and so on, completing 10 stages of beam splitting. At the same time, by taking advantage of the difference in the transmission fiber length between each stage of beam splitting delay unit, the signal after each stage of beam splitting forms a time delay of 100ns. That is, the time difference between the output signals of the first and second stages is 100ns, the time difference between the second and third stages is 100ns, and so on, and the 10 stages of signals ultimately form a total time span of 1000ns.

[0059] Combination Figure 2 The diagram shows a design scheme of a multi-level coupling delay module provided in this embodiment. This part adopts an integrated structure of 10-level optical splitting delay units. The timing delay is achieved by designing the difference in the length of the transmission optical fiber between non-adjacent optical splitting delay units. The delay time difference between two adjacent pulse laser signals is fixed at 100ns, and the 10-level signals eventually form a total timing delay of 1000ns.

[0060] Figure 3 This diagram illustrates the gradient splitting ratio parameters of the beam splitting delay unit provided in this embodiment. Each stage of the beam splitting delay unit employs a gradient splitting ratio design. The beam splitting delay unit and the transmission fiber are coupled using a fused taper process, with coupling loss controlled to 0.3 dB. The splitting ratio calculation method takes the first-stage beam splitting delay unit as an example: With a laser signal input energy of 100%, after loss in the coupling region of the first-stage beam splitting delay unit, the energy attenuates to 93.3%. The splitting ratio is set to 10%:90%, meaning the output energy of this stage is 9.33%, and the remaining 83.97% of the energy is transmitted to the next stage. To ensure that the output energy of each stage of the beam splitting delay unit is close to the ideal value, the splitting ratio of the first four stages is set to 10%:90%. The output energy of the fourth stage beam splitting delay unit is 5.52%. If the fifth stage still uses a splitting ratio of 10%:90%, its output energy will be less than 5%, which cannot meet the signal detection requirements. Therefore, the splitting ratio needs to be increased—the fifth and sixth stages use a splitting ratio of 20%:80%, and the seventh and eighth stages use splitting ratios of 30%:70% and 40%:60%, respectively. As the remaining energy gradually decreases, the energy extraction ratio needs to be significantly increased. Therefore, the ninth stage beam splitting delay unit uses a splitting ratio of 60%:40%, and the remaining energy is directly used as the output energy of the tenth stage beam splitting delay unit. This gradient splitting ratio design ensures that the output signal intensity of each stage of the beam splitting delay unit is within a reasonable range, avoiding both excessive brightness leading to signal saturation and excessive darkness leading to a low signal-to-noise ratio, thus ensuring the accuracy of the timestamp marking.

[0061] Furthermore, in one embodiment, the output shaping module includes a plurality of shaping elements corresponding one-to-one with the output ports of the multi-stage beam splitting delay unit, used to focus and shape each timing pulse laser signal before outputting it.

[0062] Preferably, in some embodiments, the multiple shaping elements employ multiple independent microlenses; the numerical aperture of the microlenses matches the numerical aperture of the solid-state transmission medium in the multi-stage coupling delay module, and the microlenses are fixed to the output end face of each stage of the beam-splitting delay unit. Preferably, the focal length of the microlens is 25 μm.

[0063] Preferably, the microlens is fixed to the output end face by means of, but not limited to, adhesive bonding (such as photoresist bonding).

[0064] Preferably, the microlens controls the focal spot size of the output pulsed laser signal to 60μm to suppress glare interference and improve the signal-to-noise ratio.

[0065] like Figure 4 The diagram shown is a mechanical structure diagram of the multi-stage coupling delay section provided in this embodiment. During assembly, a layer of UV-curable photoresist is first uniformly applied to the output end face of the multi-stage coupling delay module. Then, 10 independent microlenses (corresponding to 10 stages of the coupling delay module) are aligned with the output ports of each stage of the beam-splitting delay unit. The positions are calibrated using an optical alignment instrument to ensure that the coaxiality error between the center of the microlens and the center of the output port is ≤5μm. After adjustment, the photoresist is irradiated with UV light of wavelength 365nm at a power of 10mW / cm² for 30s to cure the photoresist and achieve a firm fixation of the microlenses.

[0066] Figure 5 This is the optical design diagram of the end-face microlens provided in this embodiment. The laser signal propagates forward to the output end face via total internal reflection within the core of the multimode fiber, and is then focused and shaped by the microlens before being output. Each microlens corresponds precisely to the output port of the first-stage beam splitting delay unit. Preferably, the microlens are convex lenses with positive optical power, a focal length of 250 μm, and a mechanical aperture of 100 μm, and their numerical aperture matches the numerical aperture of the multimode fiber. The microlenses are made of H-LAK50A optical glass material, which has a refractive index of 1.6421 and an Abbe number of 58.40, effectively reducing chromatic aberration and ensuring focusing accuracy.

[0067] Figure 6The figure shows a geometric image analysis of the end-face microlens provided in this embodiment. As can be seen from the figure, after the laser signal is focused and shaped by the microlens, glare interference is effectively suppressed, and the size of the convergence point spot is controlled to 60μm. This design can avoid the increase in optical signal loss due to the expansion of the field of view of the receiving system caused by the spot being too small, while preventing the optical signal energy from being dispersed and the signal-to-noise ratio from being too large. This ensures that the output signal energy is concentrated and the signal-to-noise ratio is stable, providing a high-quality timestamp signal and significantly improving the accuracy and reliability of the measurement results.

[0068] Furthermore, in one embodiment, the device further includes an insulating housing, wherein the pulsed laser generating module and the multi-stage coupling delay module are each independently encapsulated in their respective insulating housings, and a light-transmitting window is provided on the insulating housing containing the multi-stage coupling delay module at a position corresponding to the output shaping module.

[0069] In summary, this invention provides a high-performance all-solid-state timestamp marking device through clear core component selection, precise assembly process design, and reasonable timing parameter planning, successfully achieving all-solid-state transmission and timing output of pulsed laser signals. By transmitting the pulsed laser signal entirely within a solid-state medium, this invention effectively reduces transmission loss and improves the device's anti-interference capability and security. Through innovative gradient-type beam splitting multi-stage coupling delay design and end-face microlens group collaborative design, it significantly improves laser signal utilization efficiency while substantially reducing device manufacturing costs. This invention effectively solves the core defects of existing technologies, such as significant transmission security risks, poor environmental adaptability, low consumable utilization, and poor output quality. It possesses significant advantages such as high security, strong environmental adaptability, high consumable utilization, and excellent output quality, and can be widely applied in fields such as high-speed framing camera external trigger delay characteristic measurement.

[0070] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention without departing from its spirit and scope should be included within the protection scope of the present invention.

Claims

1. A fully solid-state timestamp marking device, characterized in that, The device includes a pulsed laser generation module, a multi-stage coupling delay module, and an output shaping module; The pulsed laser generating module is used to output pulsed laser signals; The multi-level coupling delay module is connected to the pulsed laser generation module and is used to receive the pulsed laser signal and perform beam splitting and delay processing to form a multi-channel pulsed laser signal with a preset timing difference. The output shaping module is arranged on the output end face of the multi-stage coupling delay module and is used to focus and shape the multiple pulsed laser signals before outputting them. The transmission path of the pulsed laser signal is entirely located within a solid medium. The multi-stage coupling delay module internally comprises multi-stage beam-splitting delay units distributed along the signal transmission path. Each beam-splitting delay unit is coupled to the others via a solid-state waveguide structure. This allows for beam splitting of the input pulsed laser signal and the introduction of a preset timing delay, thereby forming multiple pulsed laser signals with timing gradients at the output end. The number of stages, n, of the beam-splitting delay units is: ； Each of the optical splitting delay units adopts a gradient splitting ratio design, and as the number of signal transmission stages increases, the energy extraction ratio of the optical splitting delay unit is gradually increased to keep the intensity of the output signal at each stage within a preset balance range, so as to achieve energy balance of the output signal at each stage. The multi-level coupling delay module achieves timing delay by controlling the physical length difference of the solid-state transmission medium between different levels of optical splitting delay units; wherein, the delay time difference between adjacent output signals is a preset fixed value; The output shaping module includes multiple shaping elements that correspond one-to-one with the output ports of the multi-stage beam splitting delay unit, used to focus and shape each sequential pulse laser signal before outputting it. The shaping elements employ multiple independent microlenses; the numerical aperture of the microlenses matches the numerical aperture of the solid-state transmission medium in the multi-stage coupling delay module, and the microlenses are fixed to the output end face of each stage of the beam splitting delay unit.

2. The all-solid-state timestamp marking device according to claim 1, characterized in that, The pulsed laser generating module is connected to the multi-stage coupling delay module via a sealed connection component to achieve a detachable and sealed transmission connection, forming a sealed laser transmission channel.

3. The all-solid-state timestamp marking device according to claim 2, characterized in that, The pulsed laser generation module uses a pulsed laser with a pigtail output.

4. The all-solid-state timestamp marking device according to claim 2, characterized in that, The sealing connection assembly includes a connecting flange, one end of which is detachably connected to the output end of the pulsed laser pigtail, and the other end is fixedly connected to the input end of the multi-stage coupling delay module; the sealing connection assembly also includes sealing gaskets disposed at the connection points of the connecting flange with the pulsed laser generation module and the multi-stage coupling delay module respectively, and the connection method adopts a sealing structure combining snap-fit ​​positioning and threaded locking.

5. The all-solid-state timestamp marking device according to claim 1, characterized in that, The device also includes an insulating housing, in which the pulsed laser generating module and the multi-stage coupling delay module are independently encapsulated within their respective insulating housings, and a light-transmitting window is provided on the insulating housing containing the multi-stage coupling delay module at the position corresponding to the output shaping module.

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